Remove version (mod) flag from releases

Internals: Store all AstDisplay etc strings in un-backslashed raw format.

.gitignore

@@ -1,3 +1,4 @@
+*~
 *.old
 *.gz
 *.gz.uu

Artistic

@@ -0,0 +1,197 @@
+Artistic License 2.0
+
+Copyright (c) 2000-2006, The Perl Foundation.
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+Preamble
+********
+
+This license establishes the terms under which a given free software
+Package may be copied, modified, distributed, and/or redistributed.  The
+intent is that the Copyright Holder maintains some artistic control over
+the development of that Package while still keeping the Package
+available as open source and free software.
+
+You are always permitted to make arrangements wholly outside of this
+license directly with the Copyright Holder of a given Package.  If the
+terms of this license do not permit the full use that you propose to
+make of the Package, you should contact the Copyright Holder and seek a
+different licensing arrangement.
+
+Definitions
+***********
+
+"Copyright Holder" means the individual(s) or organization(s) named in
+the copyright notice for the entire Package.
+
+"Contributor" means any party that has contributed code or other
+material to the Package, in accordance with the Copyright Holder's
+procedures.
+
+"You" and "your" means any person who would like to copy, distribute, or
+modify the Package.
+
+"Package" means the collection of files distributed by the Copyright
+Holder, and derivatives of that collection and/or of those files.  A
+given Package may consist of either the Standard Version, or a Modified
+Version.
+
+"Distribute" means providing a copy of the Package or making it
+accessible to anyone else, or in the case of a company or organization,
+to others outside of your company or organization.
+
+"Distributor Fee" means any fee that you charge for Distributing this
+Package or providing support for this Package to another party.  It does
+not mean licensing fees.
+
+"Standard Version" refers to the Package if it has not been modified, or
+has been modified only in ways explicitly requested by the Copyright
+Holder.
+
+"Modified Version" means the Package, if it has been changed, and such
+changes were not explicitly requested by the Copyright Holder.
+
+"Original License" means this Artistic License as Distributed with the
+Standard Version of the Package, in its current version or as it may be
+modified by The Perl Foundation in the future.
+
+"Source" form means the source code, documentation source, and
+configuration files for the Package.
+
+"Compiled" form means the compiled bytecode, object code, binary, or any
+other form resulting from mechanical transformation or translation of
+the Source form.
+
+Permission for Use and Modification Without Distribution
+********************************************************
+
+(1) You are permitted to use the Standard Version and create and use
+Modified Versions for any purpose without restriction, provided that you
+do not Distribute the Modified Version.
+
+Permissions for Redistribution of the Standard Version
+******************************************************
+
+(2) You may Distribute verbatim copies of the Source form of the
+Standard Version of this Package in any medium without restriction,
+either gratis or for a Distributor Fee, provided that you duplicate all
+of the original copyright notices and associated disclaimers.  At your
+discretion, such verbatim copies may or may not include a Compiled form
+of the Package.
+
+(3) You may apply any bug fixes, portability changes, and other
+modifications made available from the Copyright Holder.  The resulting
+Package will still be considered the Standard Version, and as such will
+be subject to the Original License.
+
+Distribution of Modified Versions of the Package as Source
+**********************************************************
+
+(4) You may Distribute your Modified Version as Source (either gratis or
+for a Distributor Fee, and with or without a Compiled form of the
+Modified Version) provided that you clearly document how it differs from
+the Standard Version, including, but not limited to, documenting any
+non-standard features, executables, or modules, and provided that you do
+at least ONE of the following:
+
+(a) make the Modified Version available to the Copyright Holder of the
+Standard Version, under the Original License, so that the Copyright
+Holder may include your modifications in the Standard Version.
+
+(b) ensure that installation of your Modified Version does not prevent
+the user installing or running the Standard Version.  In addition, the
+Modified Version must bear a name that is different from the name of the
+Standard Version.
+
+(c) allow anyone who receives a copy of the Modified Version to make the
+Source form of the Modified Version available to others under
+
+(i) the Original License or
+
+(ii) a license that permits the licensee to freely copy, modify and
+redistribute the Modified Version using the same licensing terms that
+apply to the copy that the licensee received, and requires that the
+Source form of the Modified Version, and of any works derived from it,
+be made freely available in that license fees are prohibited but
+Distributor Fees are allowed.
+
+Distribution of Compiled Forms of the Standard Version or Modified
+******************************************************************
+Versions without the Source
+***************************
+
+(5) You may Distribute Compiled forms of the Standard Version without
+the Source, provided that you include complete instructions on how to
+get the Source of the Standard Version.  Such instructions must be valid
+at the time of your distribution.  If these instructions, at any time
+while you are carrying out such distribution, become invalid, you must
+provide new instructions on demand or cease further distribution.  If
+you provide valid instructions or cease distribution within thirty days
+after you become aware that the instructions are invalid, then you do
+not forfeit any of your rights under this license.
+
+(6) You may Distribute a Modified Version in Compiled form without the
+Source, provided that you comply with Section 4 with respect to the
+Source of the Modified Version.
+
+Aggregating or Linking the Package
+**********************************
+
+(7) You may aggregate the Package (either the Standard Version or
+Modified Version) with other packages and Distribute the resulting
+aggregation provided that you do not charge a licensing fee for the
+Package.  Distributor Fees are permitted, and licensing fees for other
+components in the aggregation are permitted.  The terms of this license
+apply to the use and Distribution of the Standard or Modified Versions
+as included in the aggregation.
+
+(8) You are permitted to link Modified and Standard Versions with other
+works, to embed the Package in a larger work of your own, or to build
+stand-alone binary or bytecode versions of applications that include the
+Package, and Distribute the result without restriction, provided the
+result does not expose a direct interface to the Package.
+
+Items That are Not Considered Part of a Modified Version
+********************************************************
+
+(9) Works (including, but not limited to, modules and scripts) that
+merely extend or make use of the Package, do not, by themselves, cause
+the Package to be a Modified Version.  In addition, such works are not
+considered parts of the Package itself, and are not subject to the terms
+of this license.
+
+General Provisions
+******************
+
+(10) Any use, modification, and distribution of the Standard or Modified
+Versions is governed by this Artistic License.  By using, modifying or
+distributing the Package, you accept this license.  Do not use, modify,
+or distribute the Package, if you do not accept this license.
+
+(11) If your Modified Version has been derived from a Modified Version
+made by someone other than you, you are nevertheless required to ensure
+that your Modified Version complies with the requirements of this
+license.
+
+(12) This license does not grant you the right to use any trademark,
+service mark, tradename, or logo of the Copyright Holder.
+
+(13) This license includes the non-exclusive, worldwide, free-of-charge
+patent license to make, have made, use, offer to sell, sell, import and
+otherwise transfer the Package with respect to any patent claims
+licensable by the Copyright Holder that are necessarily infringed by the
+Package.  If you institute patent litigation (including a cross-claim or
+counterclaim) against any party alleging that the Package constitutes
+direct or contributory patent infringement, then this Artistic License
+to you shall terminate on the date that such litigation is filed.
+
+(14) Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT
+HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED
+WARRANTIES.  THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT
+PERMITTED BY YOUR LOCAL LAW.  UNLESS REQUIRED BY LAW, NO COPYRIGHT
+HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE
+OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

COPYING

@@ -1,285 +1,626 @@
-		    GNU GENERAL PUBLIC LICENSE
-		       Version 2, June 1991
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
-			    Preamble
+                            Preamble
 
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it.  (Some other Free Software Foundation software is covered by
-the GNU Library General Public License instead.)  You can apply it to
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
 your programs, too.
 
   When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
 have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
 
-  To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
 
   For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have.  You must make sure that they, too, receive or can get the
-source code.  And you must show them these terms so they know their
-rights.
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
 
-  We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
 
-  Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software.  If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
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-authors' reputations.
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
 
-  Finally, any free program is threatened constantly by software
-patents.  We wish to avoid the danger that redistributors of a free
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+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
 
   The precise terms and conditions for copying, distribution and
 modification follow.
-
-		    GNU GENERAL PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
-  0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License.  The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language.  (Hereinafter, translation is included without limitation in
-the term "modification".)  Each licensee is addressed as "you".
+                       TERMS AND CONDITIONS
 
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope.  The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
+  0. Definitions.
 
-  1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
-conspicuously and appropriately publish on each copy an appropriate
-copyright notice and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
+  "This License" refers to version 3 of the GNU General Public License.
 
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
 
-  2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
 
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+  To "modify" a work means to copy from or adapt all or part of the work
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-    whole or in part contains or is derived from the Program or any
-    part thereof, to be licensed as a whole at no charge to all third
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+  A "covered work" means either the unmodified Program or a work based
+on the Program.
 
-    c) If the modified program normally reads commands interactively
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-
-These requirements apply to the modified work as a whole.  If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
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-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
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-Thus, it is not the intent of this section to claim rights or contest
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+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
 
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
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+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
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+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
 
-  3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
+  1. Source Code.
 
-    a) Accompany it with the complete corresponding machine-readable
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-
-  4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License.  Any attempt
-otherwise to copy, modify, sublicense or distribute the Program is
-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
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+  The Corresponding Source need not include anything that users
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-  5. You are not required to accept this License, since you have not
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+same work.
 
-  6. Each time you redistribute the Program (or any work based on the
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+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
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+
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+  6. Conveying Non-Source Forms.
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+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
 this License.
 
-  7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-conditions are imposed on you (whether by court order, agreement or
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot
-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all.  For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
 
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
-apply and the section as a whole is intended to apply in other
-circumstances.
+  13. Use with the GNU Affero General Public License.
 
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices.  Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
 
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-
-  8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded.  In such case, this License incorporates
-the limitation as if written in the body of this License.
+  14. Revised Versions of this License.
 
-  9. The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time.  Such new versions will
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
 be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
 
-Each version is given a distinguishing version number.  If the Program
-specifies a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation.  If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
 
-  10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
-to ask for permission.  For software which is copyrighted by the Free
-Software Foundation, write to the Free Software Foundation; we sometimes
-make exceptions for this.  Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
 
-			    NO WARRANTY
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
 
-  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
+  15. Disclaimer of Warranty.
 
-  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGES.
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
 
-		     END OF TERMS AND CONDITIONS
-
-	Appendix: How to Apply These Terms to Your New Programs
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
 
   If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
@@ -287,15 +628,15 @@ free software which everyone can redistribute and change under these terms.
 
   To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
+state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
 
     <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) 19yy  <name of author>
+    Copyright (C) <year>  <name of author>
 
-    This program is free software; you can redistribute it and/or modify
+    This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
+    the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
@@ -304,36 +645,30 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
 
-    Gnomovision version 69, Copyright (C) 19yy name of author
-    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type `show c' for details.
 
 The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
 
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary.  Here is a sample; alter the names:
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
 
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-  <signature of Ty Coon>, 1 April 1989
-  Ty Coon, President of Vice
-
-This General Public License does not permit incorporating your program into
-proprietary programs.  If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library.  If this is what you want to do, use the GNU Library General
-Public License instead of this License.
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

COPYING.LESSER

@@ -0,0 +1,165 @@
+		   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.

Changes

@@ -3,6 +3,190 @@ Revision history for Verilator
 The contributors that suggested a given feature are shown in [].  [by ...]
 indicates the contributor was also the author of the fix; Thanks!
 
+* Verilator 3.720 2009/10/26
+
+**   Support little endian bit vectors ("reg [0:2] x;").
+
+**   Support division and modulus of > 64 bit vectors.  [Gary Thomas]
+
+***  Fix writing to out-of-bounds arrays writing element 0.
+
+**** Fix core dump with SystemVerilog var declarations under unnamed begins.
+
+**** Fix VCD files showing internal flattened hierarchy, broke in 3.714.
+
+**** Fix cell port connection to unsized integer causing false width warning.
+
+**** Fix erroring on strings with backslashed newlines, bug168. [Pete Nixon]
+
+* Verilator 3.714 2009/09/18
+
+**   Add --bbox-sys option to blackbox $system calls.
+
+**   Support generate for var++, var--, ++var, --var.
+
+***  Improved warning when "do" used as identifier.
+
+**** Don't require SYSTEMPERL_INCLUDE if SYSTEMPERL/src exists. [Gary Thomas]
+
+**** Fix deep defines causing flex scanner overflows. [Brad Dobbie]
+
+**** Fix preprocessing commas in deep parameterized macros. [Brad Dobbie]
+
+**** Fix tracing escaped dotted identifiers, bug107.
+
+**** Fix $display with uppercase %M.
+
+**** Fix --error-limit option being ignored.
+
+* Verilator 3.713 2009/08/04
+
+**   Support constant function calls for parameters. [many!]
+
+***  Support SystemVerilog "logic", bug101.  [by Alex Duller]
+
+***  Name SYMRSVDWORD error, and allow disabling it, bug103. [Gary Thomas]
+
+**** Fix escaped preprocessor identifiers, bug106. [Nimrod Gileadi]
+
+* Verilator 3.712 2009/07/14
+
+**   Patching SystemC is no longer required to trace sc_bvs.
+
+***  Support zero-width constants in concatenations.  [Jeff Winston]
+
+***  Add verilator --pins-uint8 option to use sc_in<uint8_t/uint16_t>.
+
+***  Add verilator -V option, to show verbose version.
+
+***  On WIDTH warnings, show variable name causing error.  [Jeff Winston]
+
+**** Add BLKLOOPINIT error code, and describe --unroll-count.  [Jeff Winston]
+
+* Verilator 3.711 2009/06/23
+
+**** Support decimal constants of arbitrary widths. [Mark Marshall]
+
+**** Fix error on case statement with all duplicate items, bug99. [Gary Thomas]
+
+**** Fix segfault on unrolling for's with bad inits, bug90. [Andreas Olofsson]
+
+**** Fix tristates causing "Assigned pin is neither...". [by Lane Brooks]
+
+**** Fix compiler errors under Fedora release candidate 11. [Chitlesh Goorah]
+
+* Verilator 3.710 2009/05/19
+
+**   Verilator is now licensed under LGPL v3 and/or Artistic v2.0.
+
+***  `__FILE__ now expands to a string, per draft SystemVerilog 2010(ish).
+
+**** The front end parser has been re-factored to enable more SV parsing.
+     Code should parse the same, but minor parsing bugs may pop up.
+
+**** Verilator_includer is no longer installed twice, bug48.  [Lane Brooks]
+
+**** Fix escaped identifiers with '.' causing conflicts, bug83.  [J Baxter]
+
+**** Fix define formal arguments that contain newlines, bug84. [David A]
+
+* Verilator 3.703 2009/05/02
+
+***  Fix $clog2 calculation error with powers-of-2, bug81. [Patricio Kaplan]
+
+**** Fix error with tasks that have output first, bug78.  [Andrea Foletto]
+
+**** Fix "cloning" error with -y/--top-module, bug76. [Dimitris Nalbantis]
+
+**** Fix segfault with error on bad --top-module, bug79. [Dimitris Nalbantis]
+
+**** Fix "redefining I" error with complex includes.  [Duraid Madina]
+
+**** Fix GCC 4.3.2 compile warnings.
+
+* Verilator 3.702 2009/03/28
+
+***  Add --pins-bv option to use sc_bv for all ports.  [Brian Small]
+
+***  Add SYSTEMPERL_INCLUDE envvar to assist RPM builds.  [Chitlesh Goorah]
+
+**** Report errors when duplicate labels are used, bug72.  [Vasu Kandadi]
+
+**** Fix the SC_MODULE name() to not include __PVT__.  [Bob Fredieu]
+
+* Verilator 3.701 2009/02/26
+
+**   Support repeat and forever statements.  [Jeremy Bennett]
+
+***  Add --debugi-<srcfile> option, for internal debugging. [Dennis Muhlestein]
+
+**** Fix compile issues with GCC 4.3, bug47.  [Lane Brooks]
+
+**** Fix VL_RANDom to better randomize bits.  [Art Stamness]
+
+**** Fix error messages to consistently go to stderr. [Jeremy Bennett]
+
+**** Fix left associativity for ?: operators.
+
+* Verilator 3.700 2009/01/08
+
+**   Add limited support for tristate inouts.  Written by Lane Brooks,
+     under support by Ubixum Inc.  This allows common pad ring and
+     tristate-mux structures to be Verilated.  See the documentation for
+     more information on supported constructs.
+
+**   Add --coverage_toggle for toggle coverage analysis.
+     Running coverage now requires SystemPerl 1.301 or newer.
+
+***  Add /*verilator coverage_on/_off */ to bracket coverage regions.
+
+***  Optimize two-level shift and and/or trees, +23% on one test.
+
+***  Support posedge of bit-selected signals, bug45. [Rodney Sinclair]
+
+***  Line coverage now aggregates by hierarchy automatically.
+     Previously this would be done inside SystemPerl, which was slower.
+
+**** Minor performance improvements of Verilator compiler runtime.
+
+**** Coverage of each parametarized module is counted separately. [Bob Fredieu]
+
+**** Fix creating parameterized modules when no parameter values are changed.
+
+**** Fix certain generate-if cells causing "clone" error. [Stephane Laurent]
+
+**** Fix line coverage of public functions.  [Soon Koh]
+
+**** Fix SystemC 2.2 deprecated warnings about sensitive() and sc_start().
+
+**** Fix arrayed variables under function not compiling, bug44. [Ralf Karge]
+
+**** Fix --output-split-cfuncs to also split trace code. [Niranjan Prabhu]
+
+**** Fix 'bad select range' warning missing some cases, bug43. [Lane Brooks]
+
+**** Fix internal signal names containing control characters (broke in 3.680).
+
+**** Fix compile error on Ubuntu 8.10. [Christopher Boumenot]
+
+**** Fix internal error on "output x; reg x = y;".
+
+**** Fix wrong result for read of delayed FSM signal, bug46. [Rodney Sinclair]
+
+* Verilator 3.681 2008/11/12
+
+***  Add SystemVerilog unique and priority case.
+
+**** Include Verilog file's directory name in coverage reports.
+
+**** Fix 'for' under 'generate-for' causing error; bug38. [Rafael Shirakawa]
+
+**** Fix coverage hierarchy being backwards with inlining.  [Vasu Arasanipalai]
+
+**** Fix GCC 4.3 compile error; bug35.  [Lane Brooks]
+
+**** Fix MSVC compile error; bug42.  [John Stroebel]
+
 * Verilator 3.680 2008/10/08
 
 **   Support negative bit indexes. [Stephane Laurent]
@@ -11,6 +195,8 @@ indicates the contributor was also the author of the fix; Thanks!
 ***  Suppress width warnings between constant strings and wider vectors.
      [Rodney Sinclair]
 
+**** Ignore SystemVerilog timeunit and timeprecision.
+
 **** Expand environment variables in -f input files.  [Lawrence Butcher]
 
 **** Report error if port declaration is missing; bug32. [Guy-Armand Kamendje]
@@ -1318,9 +1504,10 @@ of input ports exists for tracing.
 
 This uses outline mode in Emacs.  See C-h m [M-x describe-mode].
 
-Copyright 2001-2008 by Wilson Snyder.  This program is free software;
-you can redistribute it and/or modify it under the terms of either the GNU
-General Public License or the Perl Artistic License.
+Copyright 2001-2009 by Wilson Snyder.  This program is free software; you
+can redistribute it and/or modify it under the terms of either the GNU
+Lesser General Public License Version 3 or the Perl Artistic License
+Version 2.0.
 
 Local variables:
 mode: outline

Makefile.in

@@ -9,9 +9,10 @@
 #
 #*****************************************************************************
 #
-# Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
+# Copyright 2003-2009 by Wilson Snyder. This program is free software; you can
 # redistribute it and/or modify it under the terms of either the GNU
-# General Public License or the Perl Artistic License.
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
 #
 # Verilator is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -86,6 +87,9 @@ pkgdatadir = @pkgdatadir@
 # Directory in which to install data across multiple architectures
 datarootdir = @datarootdir@
 
+# Compile options
+CFG_WITH_DEFENV = @CFG_WITH_DEFENV@
+
 #### End of system configuration section. ####
 ######################################################################
 
@@ -100,18 +104,18 @@ DISTDEP = info Makefile
 # Files to distribute.
 DISTBIN = $(wildcard bin/verilator-*)
 
-DISTFILES_INC = $(INFOS) .gitignore COPYING *.in *.ac \
+DISTFILES_INC = $(INFOS) .gitignore Artistic COPYING COPYING.LESSER \
+	*.in *.ac \
 	Changes README TODO \
 	MANIFEST.SKIP \
 	bin/* \
 	install-sh configure mkinstalldirs *.texi \
-	include/verilated.[chv]* \
-	include/verilatedos.[chv]* \
+	include/verilated*.[chv]* \
 	include/*.in \
 	include/.*ignore \
 	.*attributes */.*attributes  */*/.*attributes \
 	src/.*ignore src/*.in src/*.cpp src/*.[chly] src/astgen src/bisonpre src/*fix \
-	src/*.pl \
+	src/*.pl src/*.pod \
 	test_*/.*ignore test_*/Makefile* test_*/*.cpp \
 	test_*/*.pl test_*/*.v test_*/*.vc test_*/vlint \
 	test_verilated/vgen*.pl \
@@ -131,6 +135,7 @@ INST_PROJ_FILES = \
 	include/verilated.[chv]* \
 	include/verilated.mk \
 	include/verilatedos.[chv]* \
+	include/verilatedsc.[chv]* \
 
 INST_PROJ_BIN_FILES = \
 	verilator_bin \
@@ -140,6 +145,12 @@ DISTFILES := $(DISTFILES_INC)
 
 VL_INST_MAN_FILES = verilator.1
 
+ifeq ($(OBJCACHE_HOSTS),)
+export OBJCACHE_JOBS :=
+else
+export OBJCACHE_JOBS := -j $(shell objcache --jobs "$(OBJCACHE_HOSTS)")
+endif
+
 all: all_nomsg msg_test
 all_nomsg: verilator_exe $(VL_INST_MAN_FILES)
 
@@ -147,7 +158,7 @@ all_nomsg: verilator_exe $(VL_INST_MAN_FILES)
 verilator_exe verilator_bin verilator_bin_dbg:
 	@echo ------------------------------------------------------------
 	@echo "making verilator in src" ; \
-	  (cd src && $(MAKE) )
+	  (cd src && $(MAKE) $(OBJCACHE_JOBS) )
 
 .PHONY:msg_test
 msg_test:
@@ -230,7 +241,6 @@ VL_INST_BIN_FILES = verilator verilator_bin verilator_bin_dbg \
 installbin:
 	$(SHELL) ${srcdir}/mkinstalldirs $(DESTDIR)$(bindir)
 	( cd bin ; $(INSTALL_PROGRAM) verilator $(DESTDIR)$(bindir)/verilator )
-	( cd bin ; $(INSTALL_PROGRAM) verilator_includer $(DESTDIR)$(bindir)/verilator_includer )
 	( cd bin ; $(INSTALL_PROGRAM) verilator_profcfunc $(DESTDIR)$(bindir)/verilator_profcfunc )
 	( $(INSTALL_PROGRAM) verilator_bin $(DESTDIR)$(bindir)/verilator_bin )
 	( $(INSTALL_PROGRAM) verilator_bin_dbg $(DESTDIR)$(bindir)/verilator_bin_dbg )
@@ -271,6 +281,10 @@ install-project: dist
 	rm $(DISTNAME).tgz
 
 install-project-quick:
+ifeq ($(CFG_WITH_DEFENV),yes)
+	@echo "%Error: Reconfigure with './configure --disable-defenv' to avoid hardcoded paths."
+	false
+endif
 	@echo "Install-project-quick (no strip) to $(DIRPROJECT)"
 	for p in $(INST_PROJ_FILES) ; do \
 	  $(INST_PROJ_CVS) $$p $(DIRPROJECT)/hw/utils/verilator/$$p; \

TODO

@@ -1,8 +1,9 @@
 // DESCRIPTION: Verilator: List of To Do issues.
 //
-// Copyright 2004-2008 by Wilson Snyder. This program is free software; you can
+// Copyright 2004-2009 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 
 
 Features:
@@ -54,6 +55,7 @@ Usability:
 Internal Code:
 	Eliminate the AstNUser* passed to all visitors; its only needed in V3Width,
 	and removing it will speed up and simplify all the other code.
+	V3Graph should be templated container type, taking in Vertex + Edge types
 
 Performance:
 	Constant propagation

bin/verilator

@@ -3,9 +3,10 @@ eval 'exec perl -wS $0 ${1+"$@"}'
   if 0;
 ######################################################################
 #
-# Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
-# General Public License or the Perl Artistic License.
+# Copyright 2003-2009 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -17,9 +18,9 @@ eval 'exec perl -wS $0 ${1+"$@"}'
 require 5.006_001;
 use warnings;
 BEGIN {
-    if (my $Project=($ENV{DIRPROJECT}||$ENV{PROJECT})) {
+    if ($ENV{DIRPROJECT} && $ENV{DIRPROJECT_PERL_BOOT}) {
 	# Magic to allow author testing of perl packages in local directory
-	require "$Project/hw/utils/perltools/boot.pl";
+	require $ENV{DIRPROJECT}."/".$ENV{DIRPROJECT_PERL_BOOT};
     }
 }
 
@@ -44,6 +45,7 @@ autoflush STDERR 1;
 
 $Debug = 0;
 my $opt_gdb;
+my $opt_gdbbt;
 
 # No arguments can't do anything useful.  Give help
 if ($#ARGV < 0) {
@@ -65,20 +67,29 @@ if (! GetOptions (
 		  # "version!"	=> \&version,	# Also passthru'ed
 		  # Switches
 		  "gdb=s"	=> \$opt_gdb,	# Undocumented debugging
+		  "gdbbt!"	=> \$opt_gdbbt,	# Undocumented debugging
 		  # Additional parameters
 		  "<>"		=> sub {},	# Ignored
 		  )) {
     pod2usage(-exitstatus=>2, -verbose=>0);
 }
 
-# Determine runtime flags
-my $vcmd =(($opt_gdb?"$opt_gdb ":"")
-	   .verilator_bin()
-	   ." ".join(' ',@Opt_Verilator_Sw)
-	   );
-
-# Run verilator
-run ($vcmd);
+# Determine runtime flags and run
+if ($opt_gdbbt && !$opt_gdb && $Debug) {
+    # Run under GDB to get gdbbt
+    run ("gdb ".verilator_bin()
+	 ." --batch --quiet"
+	 ." -ex 'run ".join(' ',@Opt_Verilator_Sw)."'"
+	 ." -ex 'set width 0'"
+	 ." -ex 'bt'"
+	 ." -ex 'c'");
+    die "%Error: --gdbbt looses the exit status; so must assume run went badly...";
+} else {
+    # Normal, non gdb
+    run (($opt_gdb?"$opt_gdb ":"")
+	 .verilator_bin()
+	 ." ".join(' ',@Opt_Verilator_Sw));
+}
 
 #----------------------------------------------------------------------
 
@@ -178,18 +189,22 @@ descriptions in the next sections for more information.
 
     --assert                    Enable all assertions
     --autoflush                 Flush streams after all $displays
+    --bbox-sys                  Blackbox unknown $system calls
     --bin <filename>            Override Verilator binary
     --cc                        Create C++ output
     --compiler <compiler-name>  Tune for specified C++ compiler
     --coverage                  Enable all coverage
     --coverage-line             Enable line coverage
+    --coverage-toggle           Enable toggle coverage
     --coverage-user             Enable PSL/SVL user coverage
     -D<var>[=<value>]           Set preprocessor define
     --debug                     Enable debugging
     --debug-check               Enable debugging assertions
+    --debugi <level>            Enable debugging at a specified level
+    --debugi-<srcfile> <level>  Enable debugging a source file at a level
     --dump-tree                 Enable dumping .tree files
     -E                          Preprocess, but do not compile
-    --error-limit <value>	Abort after this number of errors
+    --error-limit <value>       Abort after this number of errors
     --exe                       Link to create executable
     -f <file>                   Parse options from a file
     --help                      Display this help.
@@ -209,6 +224,8 @@ descriptions in the next sections for more information.
     -O<optimization-letter>     Selectable optimizations
     --output-split <bytes>      Split .cpp files into pieces
     --output-split-cfuncs <statements>   Split .ccp functions
+    --pins-bv <bits>            Specify types for top level ports
+    --pins-uint8                Specify types for top level ports
     --prefix <topname>          Name of top level class
     --profile-cfuncs            Name functions for profiling
     --private                   Debugging; see docs
@@ -222,10 +239,14 @@ descriptions in the next sections for more information.
     --trace-depth <levels>      Depth of tracing
     -U<var>                     Undefine preprocessor define
     --underline-zero            Zero signals with leading _'s
+    --unroll-count <loops>      Tune maximum loop iterations
+    --unroll-stmts <stmts>      Tune maximum loop body size
+    -V                          Verbose version and config
     -v <filename>               Verilog library
     -Werror-<message>           Convert warning to error
     -Wfuture-<message>          Disable unknown message warnings
     -Wno-<message>              Disable warning
+    -Wno-lint                   Disable all lint warnings
     -x-assign <mode>            Initially assign Xs to this value
     -y <dir>                    Directory to search for modules
 
@@ -241,7 +262,7 @@ descriptions in the next sections for more information.
 
 Specifies the Verilog file containing the top module to be Verilated.
 
-=item {file.c/cc/cpp}
+=item {file.c/.cc/.cpp/.cxx}
 
 Specifies optional C++ files to be linked in with the Verilog code.  If any
 C++ files are specified in this way, Verilator will include a make rule
@@ -262,6 +283,14 @@ After every $display or $fdisplay, flush the output stream.  This insures
 that messages will appear immediately but may reduce performance.  Defaults
 off, which will buffer output as provided by the normal C stdio calls.
 
+=item --bbox-sys
+
+Black box any unknown $system task or function calls.  System tasks will be
+simply NOPed, and system functions will be replaced by unsized zero.
+Arguments to such functions will be parsed, but not otherwise checked.
+This prevents errors when linting in the presence of company specific PLI
+calls.
+
 =item --bin I<filename>
 
 Rarely needed.  Override the default filename for Verilator itself.  When a
@@ -296,7 +325,8 @@ functions to avoid error C1061.
 
 =item --coverage
 
-Enables all forms of coverage, alias for --coverage-line, --coverage-user.
+Enables all forms of coverage, alias for "--coverage-line --coverage-toggle
+--coverage-user".
 
 =item --coverage-line
 
@@ -311,12 +341,46 @@ corresponding to each counter are written into logs/coverage.pl.
 Verilator automatically disables coverage of branches that have a $stop in
 them, as it is assumed $stop branches contain an error check that should
 not occur.  A /*verilator coverage_block_off*/ comment will perform a
-similar function on any code in that block or below.
+similar function on any code in that block or below, or /*verilator
+coverage_on/coverage_off*/ will disable coverage around lines of code.
 
 Note Verilator may over-count combinatorial (non-clocked) blocks when those
 blocks receive signals which have had the UNOPTFLAT warning disabled; for
 most accurate results do not disable this warning when using coverage.
 
+=item --coverage-toggle
+
+Specifies signal toggle coverage analysis code should be inserted.
+
+Every bit of every signal in a module has a counter inserted.  The counter
+will increment on every edge change of the corresponding bit.
+
+Signals that are part of tasks or begin/end blocks are considered local
+variables and are not covered.  Signals that begin with underscores, are
+integers, or are very wide (>256 bits total storage across all dimensions)
+are also not covered.
+
+Hierarchy is compressed, such that if a module is instantiated multiple
+times, coverage will be summed for that bit across ALL instantiations of
+that module with the same parameter set.  A module instantiated with
+different parameter values is considered a different module, and will get
+counted separately.
+
+Verilator makes a minimally-intelligent decision about what clock domain
+the signal goes to, and only looks for edges in that clock domain.  This
+means that edges may be ignored if it is known that the edge could never be
+seen by the receiving logic.  This algorithm may improve in the future.
+The net result is coverage may be lower than what would be seen by looking
+at traces, but the coverage is a more accurate representation of the
+quality of stimulus into the design.
+
+There may be edges counted near time zero while the model stabilizes.  It's
+a good practice to zero all coverage just before releasing reset to prevent
+counting such behavior.
+
+A /*verilator coverage_off/on */ comment pair can be used around signals
+that do not need toggle analysis, such as RAMs and register files.
+
 =item --coverage-user
 
 Enables user inserted functional coverage.  Currently, all functional
@@ -339,6 +403,12 @@ internal assertions, debugging messages, and intermediate form dump files.
 Rarely needed.  Enable internal debugging assertion checks, without
 changing debug verbosity.  Enabled automatically when --debug specified.
 
+=item --debugi <level>
+=item --debugi-<srcfile> <level>
+
+Rarely needed - for developer use.  Set internal debugging level globally
+or on the specified source file to the specified level.
+
 =item --dump-tree
 
 Rarely needed.  Enable writing .tree debug files.  This is enabled with
@@ -393,6 +463,9 @@ appropriate `begin_keywords.
 
 Check the files for lint violations only, do not create any other output.
 
+If the design is not to be completely Verilated see also the --bbox-sys
+option.
+
 =item --MMD
 
 Enable creation of .d dependency files, used for make dependency detection,
@@ -415,9 +488,7 @@ the same as --prefix.
 
 =item --no-pins64
 
-Specifies SystemC outputs of 33-64 bits wide should use sc_bv's instead of
-uint64_t's.  Uint64's are faster, but sc_bvs were the default until
-Verilator 3.671.
+Backward compatible alias for "--pins-bv 33".
 
 =item --no-skip-identical
 
@@ -445,20 +516,40 @@ mappings of optimizations to -O letters.
 
 Enables splitting the output .cpp/.sp files into multiple outputs.  When a
 C++ file exceeds the specified number of operations, a new file will be
-created.  In addition, any slow routines will be placed into __Slow files.
-This accelerates compilation by as optimization can be disabled on the slow
-routines, and the remaining files can be compiled on parallel machines.
-Using --output-split should have only a trivial impact on performance.
-With GCC 3.3 on a 2GHz Opteron, --output-split 20000 will result in
-splitting into approximately one-minute-compile chunks.
+created at the next function boundary.  In addition, any slow routines will
+be placed into __Slow files.  This accelerates compilation by as
+optimization can be disabled on the slow routines, and the remaining files
+can be compiled on parallel machines.  Using --output-split should have
+only a trivial impact on performance.  With GCC 3.3 on a 2GHz Opteron,
+--output-split 20000 will result in splitting into approximately
+one-minute-compile chunks.
 
 =item --output-split-cfuncs I<statements>
 
 Enables splitting functions in the output .cpp/.sp files into multiple
 functions.  When a generated function exceeds the specified number of
 operations, a new function will be created.  With --output-split, this will
-enable GCC to compile faster, at a small loss in performance that increases
-with smaller statement values.
+enable GCC to compile faster, at a small loss in performance that gets
+worse with decreasing split values.  Note that this option is stronger than
+--output-split in the sense that --output-split will not split inside a
+function.
+
+=item --pins64
+
+Backward compatible alias for "--pins-bv 65".  Note that's a 65, not a 64.
+
+=item --pins-bv I<width>
+
+Specifies SystemC inputs/outputs of greater than or equal to I<width> bits
+wide should use sc_bv's instead of uint32/uint64_t's.  The default is
+"--pins-bv 65".  Versions before Verilator 3.671 defaulted to "--pins-bv
+33".  The more sc_bv is used, the worse for performance.
+
+=item --pins-uint8
+
+Specifies SystemC inputs/outputs that are smaller than the --pins-bv
+setting and 8 bits or less should use uint8_t instead of uint32_t.
+Likewise pins of width 9-16 will use uint16_t instead of uint32_t.
 
 =item --prefix I<topname>
 
@@ -544,6 +635,16 @@ zero, as was done in Verilator 2.  Default is for all signals including
 those with underlines being randomized.  This option may be depreciated in
 future versions.
 
+=item --unroll-count I<loops>
+
+Rarely needed.  Specifies the maximum number of loop iterations that may be
+unrolled.  See also BLKLOOPINIT warning.
+
+=item --unroll-stmts I<statements>
+
+Rarely needed.  Specifies the maximum number of statements in a loop for
+that loop to be unrolled. See also BLKLOOPINIT warning.
+
 =item -Werror-I<message>
 
 Convert the specified warning message into a error message.  This is
@@ -564,10 +665,10 @@ Disable the specified warning message.
 
 =item -Wno-lint
 
-Disable all lint related warning messages.  This is equivelent to
+Disable all lint related warning messages.  This is equivalent to
 "-Wno-CASEINCOMPLETE -Wno-CASEOVERLAP -Wno-CASEX -Wno-CASEWITHX
--Wno-CMPCONST -Wno-IMPLICIT -Wno-UNDRIVEN -Wno-UNSIGNED -Wno-UNUSED
--Wno-VARHIDDEN -Wno-WIDTH".
+-Wno-CMPCONST -Wno-IMPLICIT -Wno-LITENDIAN -Wno-UNDRIVEN -Wno-UNSIGNED
+-Wno-UNUSED -Wno-VARHIDDEN -Wno-WIDTH".
 
 It is strongly recommended you cleanup your code rather than using this
 option, it is only intended to be use when running test-cases of code
@@ -594,6 +695,12 @@ will call a function to determine the value, this allows randomization of
 all Xs to find reset bugs and is the slowest, but safest for finding reset
 bugs in code.
 
+If using -x-assign unique, you may want to seed your random number
+generator such that each regression run gets a different randomization
+sequence.  Use the system's srand48() or for Windows srand() function to do
+this.  You'll probably also want to print any seeds selected, and code to
+enable rerunning with that same seed so you can reproduce bugs.
+
 =back
 
 =head1 VERILOG ARGUMENTS
@@ -632,6 +739,11 @@ example module I<x> is referenced, look in I<x>.I<ext>.
 
 Undefines the given preprocessor symbol.
 
+=item -V
+
+Shows the verbose version, including configuration information compiled
+into Verilator.  (Similar to perl -V.)
+
 =item -v I<filename>
 
 Read the filename as a Verilog library.  Any modules in the file may be
@@ -717,7 +829,7 @@ This is an example similar to the above, but using SystemPerl.
           Vour* top;
           top = new Vour("top");   // SP_CELL (top, Vour);
           top->clk(clk);           // SP_PIN  (top, clk, clk);
-          while (!Verilated::gotFinish()) { sc_start(1); }
+          while (!Verilated::gotFinish()) { sc_start(1, SC_NS); }
           exit(0);
       }
     EOF
@@ -764,6 +876,27 @@ Really, you're better off using a Makefile to do all this for you.  Then,
 when your source changes it will automatically run all of these steps.  See
 the test_sp directory in the distribution for an example.
 
+=head1 CADENCE NC-SYSTEMC EXECUTION
+
+Similar to compiling Verilated designs with gcc, Verilated designs may be
+compiled inside other simulators that support SystemC models.  One such
+simulator is Cadence's NC-SystemC, part of their Incisive Verification
+Suite.  (Highly recommended.)
+
+Using the example files above, the following command will build the model
+underneath NC:
+
+   cd obj_dir
+   ncsc_run \
+	sc_main.cpp \
+	Vour__ALLcls.cpp \
+	Vour__ALLsup.cpp \
+	verilated.cpp
+
+For larger designs you'll want to automate this using makefiles, which pull
+the names of the .cpp files to compile in from the make variables generated
+in obj_dir/Vour_classes.mk.
+
 =head1 BENCHMARKING & OPTIMIZATION
 
 For best performance, run Verilator with the "-O3 -x-assign=fast
@@ -890,10 +1023,18 @@ building the SystemC model.
 
 =item SYSTEMPERL
 
-Specifies the directory containing the Verilog-Perl distribution kit.  This
-is used to find the Verilog-Perl library and include files.  If not
+Specifies the directory containing the SystemPerl distribution kit.  This
+is used to find the SystemPerl library and include files.  If not
 specified, it will come from a default optionally specified at configure
-time (before Verilator was compiled).
+time (before Verilator was compiled).  See also SYSTEMPERL_INCLUDE.
+
+=item SYSTEMPERL_INCLUDE
+
+Specifies the directory containing the Verilog-Perl include .cpp files,
+from the src/ directory of the SystemPerl kit.  If not specified, it will
+be computed from the SYSTEMPERL environment variable if it is set, and if
+SYSTEMPERL is not set SYSTEMPERL_INCLUDE will come from a default
+optionally specified at configure time (before Verilator was compiled).
 
 =item VCS_HOME
 
@@ -1038,7 +1179,8 @@ including function call-like preprocessor defines.
 
 Verilator supports ==? and !=? operators, $bits, $countones, $error,
 $fatal, $info, $isunknown, $onehot, $onehot0, $warning, always_comb,
-always_ff, always_latch, do-while, and final.
+always_ff, always_latch, do-while, final, logic, priority case/if, and
+unique case/if.
 
 It also supports .name and .* interconnection.
 
@@ -1084,6 +1226,10 @@ formally prove the directive to be true, or failing that, will insert the
 appropriate code to detect failing cases at runtime and print an "Assertion
 failed" error message.
 
+Verilator likewise also asserts any "unique" or "priority" SystemVerilog
+keywords on case statements.  However, "unique if" and "priority if" are
+currently simply ignored.
+
 =head1 LANGUAGE EXTENSIONS
 
 The following additional constructs are the extensions Verilator supports
@@ -1095,10 +1241,14 @@ or `ifdef's may break other tools.
 =item `__FILE__
 
 The __FILE__ define expands to the current filename, like C++'s __FILE__.
+This is in the draft SystemVerilog 2009 standard (but supported by
+Verilator since 2006!)
 
 =item `__LINE__
 
-The __LINE__ define expands to the current line number, like C++'s __LINE__.
+The __LINE__ define expands to the current line number, like C++'s
+__LINE__.  This is in the draft SystemVerilog 2009 standard (but supported
+by Verilator since 2006!)
 
 =item `error I<string>
 
@@ -1205,15 +1355,27 @@ The Verilog code returns to the last language mode specified with
 
 =item /*verilator clock_enable*/
 
-Experimental use only.  Used after a signal declaration to indicate the
-signal is used to gate a clock, and the user takes responsibility for
-insuring there are no races related to it.  (Typically by adding a latch,
-and running static timing analysis.) This will cause the clock gate to be
-ignored in the scheduling algorithm, improving performance.
+Used after a signal declaration to indicate the signal is used to gate a
+clock, and the user takes responsibility for insuring there are no races
+related to it.  (Typically by adding a latch, and running static timing
+analysis.) This will cause the clock gate to be ignored in the scheduling
+algorithm, improving performance.
 
 =item /*verilator coverage_block_off*/
 
-Specifies the entire begin/end block should be ignored for coverage analysis.
+Specifies the entire begin/end block should be ignored for coverage
+analysis purposes.
+
+=item /*verilator coverage_off*/
+
+Specifies that following lines of code should have coverage disabled.
+Often used to ignore an entire module for coverage analysis purposes.
+
+=item /*verilator coverage_on*/
+
+Specifies that following lines of code should have coverage reenabled (if
+appropriate --coverage flags are passed) after being disabled earlier with
+/*verilator coverage_off*/.
 
 =item /*verilator inline_module*/
 
@@ -1234,6 +1396,7 @@ this to the signal causing a false loop may clear up the problem.
 IE, with the following
 
     reg splitme /* verilator isolate_assignments*/;
+    // Note the placement of the semicolon above
     always @* begin
       if (....) begin
          splitme = ....;
@@ -1439,9 +1602,25 @@ all variables to one at startup finds most problems.
 
 =head2 Tri/Inout
 
-As a 2 state compiler, tristate and inouts are not supported.
-Traditionally only chip "cores" are Verilated, the pad rings have been
-written by hand in C++.
+Verilator converts some simple tristate structures into two state. An assignment
+of the form:
+
+    inout driver;
+    wire driver = (enable) ? output_value : 1'bz;
+    
+Will be converted to
+
+    input driver__in;     // Value being driven in from "external" drivers
+    output driver__en;    // True if driven from this module
+    output driver__enout; // Value being driven from this module
+
+Pullup, pulldown, bufif0, bufif1, notif0, notif1 are also supported.
+External logic will be needed to combine these signals with any external
+drivers.
+
+Tristate drivers are not supported inside functions and tasks; a inout
+there will be considered a two state variable that is read and written
+instead of a four state variable.
 
 =head2 Functions & Tasks
 
@@ -1468,12 +1647,6 @@ Bit ranges must be numbered with the MSB being numbered greater or the same
 as the LSB.  Little-bit-endian busses [0:15] are not supported as they
 aren't easily made compatible with C++.
 
-=head2 32-Bit Divide
-
-The division and modulus operators are limited to 32 bits.  This can be
-easily fixed if someone contributes the appropriate wide-integer math
-functions.
-
 =head2 Gate Primitives
 
 The 2-state gate primitives (and, buf, nand, nor, not, or, xnor, xor) are
@@ -1486,17 +1659,9 @@ All specify blocks and timing checks are ignored.
 
 =head2 Array Initialization
 
-When initializing an array, you need to use non-delayed assignments.  This
-is done in the interest of speed; if delayed assignments were used, the
-simulator would have to copy large arrays every cycle.  (In smaller loops,
-loop unrolling allows the delayed assignment to work, though it's a bit
-slower than a non-delayed assignment.)  Here's an example
-
-	always @ (posedge clk)
-            if (~reset_l) begin
-                for (i=0; i<`ARRAY_SIZE; i++) begin
-		    array[i] = 0;	 // Non-delayed for verilator
-                end
+When initializing a large array, you need to use non-delayed assignments.
+Verilator will tell you when this needs to be fixed; see the BLKLOOPINIT
+error for more information.
 
 =head2 Array Out of Bounds
 
@@ -1545,10 +1710,19 @@ while, wire, xnor, xor
 
 Generally supported.
 
+=item priority if, unique if
+
+Priority and unique if's are treated as normal ifs and not asserted to be
+full nor unique.
+
 =item specify specparam
 
 All specify blocks and timing checks are ignored.
 
+=item timeunit, timeprecision
+
+All timing control statements are ignored.
+
 =item uwire
 
 Verilator does not perform warning checking on uwires, it treats the uwire
@@ -1655,6 +1829,25 @@ inside a public task.
 Ignoring this warning may make Verilator simulations differ from other
 simulators.
 
+=item BLKLOOPINIT
+
+This indicates that the initialization of an array needs to use non-delayed
+assignments.  This is done in the interest of speed; if delayed assignments
+were used, the simulator would have to copy large arrays every cycle.  (In
+smaller loops, loop unrolling allows the delayed assignment to work, though
+it's a bit slower than a non-delayed assignment.)  Here's an example
+
+	always @ (posedge clk)
+            if (~reset_l) begin
+                for (i=0; i<`ARRAY_SIZE; i++) begin
+		    array[i] = 0;	 // Non-delayed for verilator
+                end
+
+This message is only seen on large or complicated loops because Verilator
+generally unrolls small loops.  You may want to try increasing
+--unroll-count (and occasionally --unroll-stmts) which will raise the small
+loop bar to avoid this error.
+
 =item CASEINCOMPLETE
 
 Warns that inside a case statement there is a stimulus pattern for which
@@ -1689,7 +1882,7 @@ correctly.
 Warns that a case statement contains a constant with a C<x>.  Verilator is
 two-state so interpret such items as always false.  Note a common error is
 to use a C<X> in a case or casez statement item; often what the user
-instead insteaded is to use a casez with C<?>.
+instead intended is to use a casez with C<?>.
 
 Ignoring this warning will only suppress the lint check, it will simulate
 correctly.
@@ -1755,6 +1948,16 @@ Verilator cannot schedule these variables correctly.
 Ignoring this warning may make Verilator simulations differ from other
 simulators.
 
+=item LITENDIAN
+
+Warns that a vector is declared with little endian bit numbering
+(i.e. [0:7]).  Big endian bit numbering is now the overwhelming standard,
+and little numbering is now thus often due to simple oversight instead of
+intent.
+
+Ignoring this warning will only suppress the lint check, it will simulate
+correctly.
+
 =item MULTIDRIVEN
 
 Warns that the specified signal comes from multiple always blocks.  This is
@@ -1802,6 +2005,13 @@ example:
 Ignoring this warning may make Verilator simulations differ from other
 simulators.
 
+=item SYMRSVDWORD
+
+Error that a symbol matches a C++ reserved word and using this as a symbol
+name would result in odd C compiler errors.  You may disable this error
+message as you would disable warnings, but the symbol will be renamed by
+Verilator to avoid the conflict.
+
 =item TASKNSVAR
 
 Error when a call to a task or function has a output from that task tied to
@@ -1952,7 +2162,7 @@ correctly.
 =item WIDTHCONCAT
 
 Warns that based on width rules of Verilog, a concatenate or replication
-has a undeterminate width.  In most cases this violates the Verilog rule
+has a indeterminate width.  In most cases this violates the Verilog rule
 that widths inside concatenates and replicates must be sized, and should be
 fixed in the code.
 
@@ -2020,10 +2230,10 @@ Visual C++ Version 7 or newer, but this is not tested by the author.
 
 =item Can you provide binaries?
 
-Verilator is available as a RPM for SuSE and perhaps other systems; this is
-done by porters and may slightly lag the primary distribution.  If there
-isn't a binary build for your distribution, how about you set one up?
-Please contact the authors for assistance.
+Verilator is available as a RPM for SuSE, Fedora, and perhaps other
+systems; this is done by porters and may slightly lag the primary
+distribution.  If there isn't a binary build for your distribution, how
+about you set one up?  Please contact the authors for assistance.
 
 Note people sometimes request binaries when they are having problems with
 their C++ compiler. Alas, binaries won't help this, as in the end a fully
@@ -2043,15 +2253,24 @@ so your simulator shouldn't have to be -- and Verilator is closer to the
 synthesis interpretation, so this is a good thing for getting working
 silicon.
 
-=item May programs I create with Verilator remain under my own copyright?
+=item Will Verilator output remain under my own copyright?
 
-Yes, it's just like using GCC on your programs.  If you change Verilator
-itself, you must make the source code available under the GNU Public
-License.  However, the include and generated files use the GNU Lesser
-Public License, which means that files using them are NOT required to be released.
+Yes, it's just like using GCC on your programs; this is why Verilator uses
+the "GNU *Lesser* Public License Version 3" instead of the more typical
+"GNU Public License".  See the licenses for details, but in brief, if you
+change Verilator itself or the header files Verilator includes, you must
+make the source code available under the GNU Lesser Public License.
+However, Verilator output (the Verilated code) only "include"s the licensed
+files, and so you are NOT required to release any output from Verilator.
 
 You also have the option of using the Perl Artistic License, which again
-does not require you release your Verilog or generated code.
+does not require you release your Verilog or generated code, and also
+allows you to modify Verilator for internal use without distributing the
+modified version.  But please contribute back to the community!
+
+One limit is that you cannot under either license release a commercial
+simulation product incorporating Verilator without making the source code
+available.
 
 =item Why is running Verilator so slow?
 
@@ -2062,7 +2281,7 @@ using --debug), see if your machine is paging; most likely you need to run
 it on a machine with more memory.  Verilator is a full 64 bit application
 and may use more than 4GB, but about 1GB is the maximum typically needed.
 
-=item How do I generate waveforms (traces) in C++ or SystemC?
+=item How do I generate waveforms (traces) in C++?
 
 See the next question for tracing in SystemPerl mode.
 
@@ -2075,21 +2294,63 @@ untarred directory.
 In your top level C code, call Verilated::traceEverOn(true).  Then create a
 SpTraceVcdC object, and in your main loop call "trace_object->dump(time)"
 every time step, and finally call "trace_object->close()".  For an example,
-see the call to SpTraceVcdC in the test_c/sim_main.cpp file of the
-distribution.
+see below and the test_c/sim_main.cpp file of the distribution.
 
 You also need to compile SpTraceVcdC.cpp and add it to your link.  This is
 done for you if using the Verilator --exe flag.
 
-=item How do I generate waveforms (traces) in SystemPerl?
+Note you can also call ->trace on multiple Verilated objects with the same
+trace file if you want all data to land in the same output file.
+
+    #include "SpTraceVcdC.cpp"
+    ...
+    int main(int argc, char **argv, char **env) {
+        ...
+        Verilated::traceEverOn(true);
+        SpTraceVcdCFile* tfp = new SpTraceVcdCFile;
+        topp->trace (tfp, 99);
+        tfp->open ("obj_dir/t_trace_ena_cc/simx.vcd");
+        ...
+        while (sc_time_stamp() < sim_time && !Verilated::gotFinish()) {
+            main_time += #;
+            tfp->dump (main_time);
+        }
+        tfp->close();
+    }
+
+=item How do I generate waveforms (traces) in SystemC/SystemPerl?
 
 Add the --trace switch to Verilator, and make sure the SystemPerl package
 is installed.
 
-In your top level C sc_main code, call Verilated::traceEverOn(true).  Then
-create a SpTraceFile object as you would create a normal SystemC trace
-file.  For an example, see the call to SpTraceFile in the
-test_sp/sc_main.cpp file of the distribution.
+In your top level C sc_main code, include SpTraceVcd.h.  Then call
+Verilated::traceEverOn(true).  Then create a SpTraceFile object as you
+would create a normal SystemC trace file.  For an example, see the call to
+SpTraceFile in the test_sp/sc_main.cpp file of the distribution, and below.
+
+Alternatively you may use the C++ trace mechanism described in the previous
+question, however the timescale and timeprecision will not inherited from
+your SystemC settings.
+
+You'll then need to compile in Sp.cpp, which includes SpTraceVcd.cpp among
+other things.
+
+Note you can also call ->trace on multiple Verilated objects with the same
+trace file if you want all data to land in the same output file.
+
+    #include "SpTraceVcd.cpp"
+    ...
+    int main(int argc, char **argv, char **env) {
+        ...
+        Verilated::traceEverOn(true);
+        SpTraceFile* tfp = new SpTraceFile;
+        topp->trace (tfp, 99);
+        tfp->open ("obj_dir/t_trace_ena_cc/simx.vcd");
+        ...
+        sc_start(1);
+	...
+        tfp->close();
+    }
 
 =item How do I view waveforms (traces)?
 
@@ -2097,6 +2358,21 @@ Verilator makes standard VCD (Value Change Dump) files.  They are viewable
 with the public domain Dinotrace or GtkWave programs, or any of the many
 commercial offerings.
 
+=item How do I reduce the size of large waveform (trace) files?
+
+First, instead of calling SpTraceVcdCFile->open at the beginning of time,
+delay calling it until the time stamp where you want to tracing to begin.
+Likewise you can also call SpTraceVcdCFile->open before the end of time
+(perhaps a short period after you detect a verification error.)
+
+Next, add /*verilator tracing_off*/ to any very low level modules you never
+want to trace (such as perhaps library cells).  Finally, use the
+--trace-depth option to limit the depth of tracing, for example
+--trace-depth 1 to see only the top level signals.
+
+Also be sure you write your trace files to a local disk, instead of to a
+network disk.  Network disks are generally far slower.
+
 =item How do I do coverage analysis?
 
 Verilator supports both block (line) coverage and user inserted functional
@@ -2253,7 +2529,8 @@ strips array bound checks where it believes them to be unnecessary.)
 
 In the SYSTEMC example above, if you had in our.v:
 
-         input clk /*verilator public*/;
+    input clk /*verilator public*/;
+    // Note the placement of the semicolon above
 
 From the sc_main.cpp file, you'd then:
 
@@ -2346,32 +2623,43 @@ faster than many popular commercial simulators.
 Many people have provided ideas and other assistance with Verilator.
 
 The major corporate sponsors of Verilator, by providing funds or equipment
-grants, are Compaq Corporation, Digital Equipment Corporation, Maker
-Communications, Sun Microsystems, Nauticus Networks, and SiCortex.
+grants include Compaq Corporation, Digital Equipment Corporation, Intel
+Corporation, Maker Communications, MicroTune Inc., Sun Microsystems,
+Nauticus Networks, and SiCortex Inc.
 
-The people who have contributed code or other major functionality are Paul
-Wasson, Duane Galbi, and Wilson Snyder.  Major testers include Jeff Dutton,
-Ralf Karge, David Hewson, Wim Michiels, and Gene Weber.
+The people who have contributed code or other major functionality are Lane
+Brooks, Duane Galbi, Paul Wasson, and Wilson Snyder.  Major testers include
+Jeff Dutton, Ralf Karge, David Hewson, Wim Michiels, and Gene Weber.
 
 Some of the people who have provided ideas and feedback for Verilator
-include Hans Van Antwerpen, Jens Arm, David Black, Gregg Bouchard, Chris
-Boumenot, John Brownlee, Lauren Carlson, Robert A. Clark, John Deroo, Danny
-Ding, Jeff Dutton, Eugen Fekete, Sam Gladstone, Thomas Hawkins, Mike Kagen,
-Ralf Karge, Dan Katz, Sol Katzman, Gernot Koch, Steve Kolecki, Steve Lang,
-Charlie Lind, Dan Lussier, Fred Ma, Wim Michiels, John Murphy, Richard
-Myers, Paul Nitza, Lisa Noack, Renga Sundararajan, Shawn Wang, Greg Waters,
-Eugene Weber, Leon Wildman, and Mat Zeno.
+include David Addison, Hans Van Antwerpen, Vasu Arasanipalai, Jens Arm,
+Jeremy Bennett, David Black, Gregg Bouchard, Chris Boumenot, Bryan Brady,
+Lane Brooks, John Brownlee, Lauren Carlson, Robert A. Clark, Allan
+Cochrane, Gunter Dannoritzer, Bernard Deadman, John Deroo, John Dickol,
+Danny Ding, Jeff Dutton, Robert Farrell, Eugen Fekete, Sam Gladstone,
+Thomas Hawkins, David Hewson, Jae Hossell, Ben Jackson, Mike Kagen,
+Patricio Kaplan, Ralf Karge, Dan Katz, Sol Katzman, Jonathan Kimmitt,
+Gernot Koch, Steve Kolecki, Steve Lang, Stephane Laurent, Charlie Lind, Dan
+Lussier, Fred Ma, Wim Michiels, John Murphy, Richard Myers, Paul Nitza,
+Lisa Noack, Mark Nodine, Niranjan Prabhu, Oleg Rodionov, Mike Shinkarovsky,
+Rafael Shirakawa, Rodney Sinclair, John Stroebel, Emerson Suguimoto, Renga
+Sundararajan, Stefan Thiede, Steve Tong, Holger Waechtler, Shawn Wang, Greg
+Waters, Eugene Weber, Leon Wildman, Gerald Williams, Johan Wouters, and
+Ding Xiaoliang.
 
 =head1 DISTRIBUTION
 
 The latest version is available from L<http://www.veripool.org/>.
 
-Copyright 2003-2008 by Wilson Snyder.  Verilator is free software; you can
-redistribute it and/or modify it under the terms of either the GNU Lesser
-General Public License or the Perl Artistic License.
+Copyright 2003-2009 by Wilson Snyder.  Verilator is free software; you can
+redistribute it and/or modify the Verilator internals under the terms of
+either the GNU Lesser General Public License Version 3 or the Perl Artistic
+License Version 2.0.
 
 =head1 AUTHORS
 
+When possible, please instead report bugs to L<http://www.veripool.org/>.
+
 Wilson Snyder <[email protected]>
 
 Major concepts by Paul Wasson and Duane Galbi.

bin/verilator_difftree

@@ -1,18 +1,7 @@
 : # -*-Mode: perl;-*- use perl, wherever it is
 eval 'exec perl -wS $0 ${1+"$@"}'
   if 0;
-######################################################################
-#
-# Copyright 2005-2008 by Wilson Snyder <[email protected]>.  This
-# program is free software; you can redistribute it and/or modify it under
-# the terms of either the GNU Lesser General Public License or the Perl
-# Artistic License.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
+# See copyright, etc in below POD section.
 ######################################################################
 
 require 5.006_001;
@@ -32,14 +21,16 @@ use vars qw ($Debug);
 $Debug = 0;
 my $Opt_A;
 my $Opt_B;
+my $Opt_Lineno = 1;
 autoflush STDOUT 1;
 autoflush STDERR 1;
 Getopt::Long::config ("no_auto_abbrev");
 if (! GetOptions (
-		  "help"	=> \&usage,
-		  "debug"	=> \&debug,
-		  "<>"		=> \&parameter,
-		  )) {
+	  "help"	=> \&usage,
+	  "debug"	=> \&debug,
+	  "<>"		=> \&parameter,
+	  "lineno!"	=> \$Opt_Lineno,
+    )) {
     die "%Error: Bad usage, try 'verilator_difftree --help'\n";
 }
 
@@ -90,7 +81,7 @@ sub diff_file {
 
     filter ($a, $tmp_a);
     filter ($b, $tmp_b);
-    system("diff $tmp_a $tmp_b");
+    system("diff -u $tmp_a $tmp_b");
     unlink $tmp_a;
     unlink $tmp_b;
 }
@@ -105,6 +96,7 @@ sub filter {
 	next if $line =~ / This=/;
 	$line =~ s/0x[a-f0-9]+/0x/g;
 	$line =~ s/<e[0-9]+\#?>/<e>/g;
+	$line =~ s/{\d+}/{}/g if !$Opt_Lineno;
 	print $f2 $line;
     }
     $f1->close;
@@ -172,15 +164,19 @@ directories, ignoring irrelevant pointer differences.
 
 Displays this message and program version and exits.
 
+=item --nolineno
+
+Do not show differences in line numbering.
+
 =back
 
 =head1 DISTRIBUTION
 
 The latest version is available from L<http://www.veripool.org/verilator>.
 
-Copyright 2005-2008 by Wilson Snyder.  This package is free software; you
-can redistribute it and/or modify it under the terms of either the GNU
-Lesser General Public License or the Perl Artistic License.
+Copyright 2005-2009 by Wilson Snyder.  This package is free software; you can
+redistribute it and/or modify it under the terms of either the GNU Lesser
+General Public License Version 3 or the Perl Artistic License Version 2.0.
 
 =head1 AUTHORS
 

bin/verilator_includer

@@ -3,9 +3,9 @@ eval 'exec perl -wS $0 ${1+"$@"}'
   if 0;
 # DESCRIPTION: Print include statements for each ARGV
 #
-# Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
-# General Public License or the Perl Artistic License.
+# Copyright 2003-2009 by Wilson Snyder. This package is free software; you can
+# redistribute it and/or modify it under the terms of either the GNU Lesser
+# General Public License Version 3 or the Perl Artistic License Version 2.0.
 ######################################################################
 
 require 5.005;

bin/verilator_profcfunc

@@ -107,7 +107,7 @@ sub profcfunc {
 	    }
 	}
 
-	if ($vfunc =~ /__PROF__([a-zA-Z_0-9]+)__([0-9]+)\(/) {
+	if ($vfunc =~ /__PROF__([a-zA-Z_0-9]+)__l?([0-9]+)\(/) {
 	    $vfunc     = sprintf("VBlock    %s:%d", $1, $2);
 	    $groups{type}{"Verilog Blocks under $design"} += $pct;
 	    $groups{design}{$design} += $pct;
@@ -208,9 +208,9 @@ Displays this message and program version and exits.
 
 The latest version is available from L<http://www.veripool.org/>.
 
-Copyright 2007-2008 by Wilson Snyder.  This package is free software; you
-can redistribute it and/or modify it under the terms of either the GNU
-Lesser General Public License or the Perl Artistic License.
+Copyright 2007-2009 by Wilson Snyder.  Verilator is free software; you can
+redistribute it and/or modify it under the terms of either the GNU Lesser
+General Public License Version 3 or the Perl Artistic License Version 2.0.
 
 =head1 AUTHORS
 

configure.ac

@@ -1,7 +1,8 @@
 dnl DESCRIPTION: Process this file with autoconf to produce a configure script.
-dnl Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
-dnl redistribute it and/or modify it under the terms of either the GNU
-dnl General Public License or the Perl Artistic License.
+dnl
+dnl Copyright 2003-2009 by Wilson Snyder. Verilator is free software; you can
+dnl redistribute it and/or modify it under the terms of either the GNU Lesser
+dnl General Public License Version 3 or the Perl Artistic License Version 2.0.
 
 AC_INIT(src/Verilator.cpp)
 AC_CONFIG_HEADER(src/config_build.h)
@@ -72,5 +73,5 @@ AC_SUBST(pkgdatadir)
 AC_OUTPUT(Makefile src/Makefile src/Makefile_obj include/verilated.mk)
 
 AC_MSG_RESULT([])
-AC_MSG_RESULT([Now type 'make'])
+AC_MSG_RESULT([Now type 'gmake'])
 AC_MSG_RESULT([])

include/verilated.cpp

@@ -1,9 +1,10 @@
 // -*- C++ -*-
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License.
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -73,9 +74,9 @@ void vl_fatal (const char* filename, int linenum, const char* hier, const char*
 IData VL_RAND32() {
 #if defined(_WIN32) && !defined(__CYGWIN__)
     // Windows doesn't have lrand48(), although Cygwin does.
-    return (rand()<<16) | rand();
+    return (rand()<<16) ^ rand();
 #else
-    return (lrand48()<<16) | lrand48();
+    return (lrand48()<<16) ^ lrand48();
 #endif
 }
 
@@ -135,6 +136,117 @@ WDataOutP VL_ZERO_RESET_W(int obits, WDataOutP outwp) {
     return outwp;
 }
 
+//===========================================================================
+// Slow math
+
+WDataOutP _vl_moddiv_w(int lbits, WDataOutP owp, WDataInP lwp, WDataInP rwp, bool is_modulus) {
+    // See Knuth Algorithm D.  Computes u/v = q.r
+    // This isn't massively tuned, as wide division is rare
+    // for debug see V3Number version
+    // Requires clean input
+    int words = VL_WORDS_I(lbits);
+    for (int i=0; i<words; i++) owp[i]=0;
+    // Find MSB and check for zero.
+    int umsbp1 = VL_MOSTSETBITP1_W(words,lwp); // dividend
+    int vmsbp1 = VL_MOSTSETBITP1_W(words,rwp); // divisor
+    if (VL_UNLIKELY(vmsbp1==0)  // rwp==0 so division by zero.  Return 0.
+	|| VL_UNLIKELY(umsbp1==0)) {	// 0/x so short circuit and return 0
+	return owp;
+    }
+
+    int uw = VL_WORDS_I(umsbp1);  // aka "m" in the algorithm
+    int vw = VL_WORDS_I(vmsbp1);  // aka "n" in the algorithm
+
+    if (vw == 1) {  // Single divisor word breaks rest of algorithm
+	vluint64_t k = 0;
+	for (int j = uw-1; j >= 0; j--) {
+	    vluint64_t unw64 = ((k<<VL_ULL(32)) + (vluint64_t)(lwp[j]));
+	    owp[j] = unw64 / (vluint64_t)(rwp[0]);
+	    k      = unw64 - (vluint64_t)(owp[j])*(vluint64_t)(rwp[0]);
+	}
+	if (is_modulus) {
+	    owp[0] = k;
+	    for (int i=1; i<words; i++) owp[i]=0;
+	}
+	return owp;
+    }
+
+    // +1 word as we may shift during normalization
+    uint32_t un[VL_MULS_MAX_WORDS+1]; // Fixed size, as MSVC++ doesn't allow [words] here
+    uint32_t vn[VL_MULS_MAX_WORDS+1]; // v normalized
+
+    // Zero for ease of debugging and to save having to zero for shifts
+    for (int i=0; i<words; i++) { un[i]=vn[i]=0; }
+
+    // Algorithm requires divisor MSB to be set
+    // Copy and shift to normalize divisor so MSB of vn[vw-1] is set
+    int s = 31-VL_BITBIT_I(vmsbp1-1);  // shift amount (0...31)
+    uint32_t shift_mask = s ? 0xffffffff : 0;  // otherwise >> 32 won't mask the value
+    for (int i = vw-1; i>0; i--) {
+	vn[i] = (rwp[i] << s) | (shift_mask & (rwp[i-1] >> (32-s)));
+    }
+    vn[0] = rwp[0] << s;
+
+    // Copy and shift dividend by same amount; may set new upper word
+    if (s) un[uw] = lwp[uw-1] >> (32-s);
+    else un[uw] = 0;
+    for (int i=uw-1; i>0; i--) {
+	un[i] = (lwp[i] << s) | (shift_mask & (lwp[i-1] >> (32-s)));
+    }
+    un[0] = lwp[0] << s;
+
+    // Main loop
+    for (int j = uw - vw; j >= 0; j--) {
+	// Estimate
+	vluint64_t unw64 = ((vluint64_t)(un[j+vw])<<VL_ULL(32) | (vluint64_t)(un[j+vw-1]));
+	vluint64_t qhat = unw64 / (vluint64_t)(vn[vw-1]);
+	vluint64_t rhat = unw64 - qhat*(vluint64_t)(vn[vw-1]);
+
+      again:
+	if (qhat >= VL_ULL(0x100000000)
+	    || ((qhat*vn[vw-2]) > ((rhat<<VL_ULL(32)) + un[j+vw-2]))) {
+	    qhat = qhat - 1;
+	    rhat = rhat + vn[vw-1];
+	    if (rhat < VL_ULL(0x100000000)) goto again;
+	}
+
+	vlsint64_t t = 0;  // Must be signed
+	vluint64_t k = 0;
+	for (int i=0; i<vw; i++) {
+	    vluint64_t p = qhat*vn[i];  // Multiply by estimate
+	    t = un[i+j] - k - (p & VL_ULL(0xFFFFFFFF));  // Subtract
+	    un[i+j] = t;
+	    k = (p >> VL_ULL(32)) - (t >> VL_ULL(32));
+	}
+	t = un[j+vw] - k;
+	un[j+vw] = t;
+	owp[j] = qhat; // Save quotient digit
+
+	if (t < 0) {
+	    // Over subtracted; correct by adding back
+	    owp[j]--;
+	    k = 0;
+	    for (int i=0; i<vw; i++) {
+		t = (vluint64_t)(un[i+j]) + (vluint64_t)(vn[i]) + k;
+		un[i+j] = t;
+		k = t >> VL_ULL(32);
+	    }
+	    un[j+vw] = un[j+vw] + k;
+	}
+    }
+
+    if (is_modulus) { // modulus
+	// Need to reverse normalization on copy to output
+	for (int i=0; i<vw; i++) {
+	    owp[i] = (un[i] >> s) | (shift_mask & (un[i+1] << (32-s)));
+	}
+	for (int i=vw; i<words; i++) owp[i] = 0;
+	return owp;
+    } else { // division
+	return owp;
+    }
+}
+
 //===========================================================================
 // Formatting
 
@@ -539,7 +651,11 @@ IData VL_FGETS_IXQ(int obits, void* destp, QData fpq) {
     // any read data.  This means we can't know in what location the first
     // character will finally live, so we need to copy.  Yuk.
     IData bytes = VL_BYTES_I(obits);
-    char buffer[bytes];
+    char buffer[VL_TO_STRING_MAX_WORDS*VL_WORDSIZE+1];
+    // V3Emit has static check that bytes < VL_TO_STRING_MAX_WORDS, but be safe
+    if (VL_UNLIKELY(bytes > VL_TO_STRING_MAX_WORDS*VL_WORDSIZE)) {
+	vl_fatal(__FILE__,__LINE__,"","Internal: fgets buffer overrun");
+    }
 
     // We don't use fgets, as we must read \0s.
     IData got = 0;

include/verilated.h

@@ -1,9 +1,10 @@
 // -*- C++ -*-
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License.
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -191,6 +192,9 @@ extern QData  VL_RAND_RESET_Q(int obits);	///< Random reset a signal
 extern WDataOutP VL_RAND_RESET_W(int obits, WDataOutP outwp);	///< Random reset a signal
 extern WDataOutP VL_ZERO_RESET_W(int obits, WDataOutP outwp);	///< Zero reset a signal
 
+/// Math
+extern WDataOutP _vl_moddiv_w(int lbits, WDataOutP owp, WDataInP lwp, WDataInP rwp, bool is_modulus);
+
 /// File I/O
 extern IData VL_FGETS_IXQ(int sbits, void* strgp, QData fpq);
 
@@ -227,6 +231,7 @@ extern IData VL_SSCANF_IWX(int lbits, WDataInP lwp, const char* formatp, ...);
 #define VL_SET_WQ(owp,data)	{ owp[0]=(data); owp[1]=((data)>>VL_WORDSIZE); }
 #define VL_SET_WI(owp,data)	{ owp[0]=(data); owp[1]=0; }
 #define VL_SET_QW(lwp)		( ((QData)(lwp[0])) | ((QData)(lwp[1])<<((QData)(VL_WORDSIZE)) ))
+#define _VL_SET_QII(ld,rd)      ( ((QData)(ld)<<VL_ULL(32)) | (QData)(rd) )
 
 // Use a union to avoid cast-to-different-size warnings
 /// Return FILE* from QData
@@ -301,6 +306,11 @@ extern double sc_time_stamp();
 
 // EMIT_RULE: VL_ASSIGNCLEAN:  oclean=clean; obits==lbits;
 #define VL_ASSIGNCLEAN_W(obits,owp,lwp) VL_CLEAN_WW(obits,obits,owp,lwp)
+static inline WDataOutP _VL_CLEAN_INPLACE_W(int obits, WDataOutP owp) {
+    int words = VL_WORDS_I(obits);
+    owp[words-1] &= VL_MASK_I(obits);
+    return(owp);
+}
 static inline WDataOutP VL_CLEAN_WW(int obits, int, WDataOutP owp, WDataInP lwp){
     int words = VL_WORDS_I(obits);
     for (int i=0; (i < (words-1)); i++) owp[i] = lwp[i];
@@ -336,8 +346,8 @@ static inline void VL_ASSIGNBIT_QI(int, int bit, QData& lhsr, QData rhs) {
 }
 static inline void VL_ASSIGNBIT_WI(int, int bit, WDataOutP owp, IData rhs) {
     IData orig = owp[VL_BITWORD_I(bit)];
-    owp[VL_BITWORD_I(bit)] = (orig & ~(VL_UL(1)<<VL_BITBIT_I(bit))
-			    | (rhs<<VL_BITBIT_I(bit)));
+    owp[VL_BITWORD_I(bit)] = ((orig & ~(VL_UL(1)<<VL_BITBIT_I(bit)))
+			      | (rhs<<VL_BITBIT_I(bit)));
 }
 // Alternative form that is an instruction faster when rhs is constant one.
 static inline void VL_ASSIGNBIT_IO(int, int bit, CData& lhsr, IData) {
@@ -359,35 +369,45 @@ static inline void VL_ASSIGNBIT_WO(int, int bit, WDataOutP owp, IData) {
 
 //===================================================================
 // SYSTEMC OPERATORS
-// Copying verilog format to/from systemc integers and bit vectors.
-
-#define VL_ASSIGN_IS(obits,vvar,svar) { (vvar) = VL_CLEAN_II((obits),(obits),(svar).read()); }
-#define VL_ASSIGN_SI(obits,svar,vvar) { (svar).write(vvar); }
+// Copying verilog format to systemc integers and bit vectors.
 
+#define VL_ASSIGN_ISI(obits,vvar,svar) { (vvar) = VL_CLEAN_II((obits),(obits),(svar).read()); }
 #define VL_ASSIGN_QSQ(obits,vvar,svar) { (vvar) = VL_CLEAN_QQ((obits),(obits),(svar).read()); }
+
+#define VL_ASSIGN_ISW(obits,od,svar) { \
+    od = (svar.read().get_word(0)) & VL_MASK_I(obits); \
+}
+#define VL_ASSIGN_QSW(obits,od,svar) { \
+    od = (((QData)svar.read().get_word(1))<<VL_WORDSIZE | svar.read().get_word(0)) \
+	& VL_MASK_Q(obits); \
+}
+#define VL_ASSIGN_WSW(obits,owp,svar) { \
+    int words = VL_WORDS_I(obits); \
+    for (int i=0; i < words; i++) owp[i] = svar.read().get_word(i); \
+    owp[words-1] &= VL_MASK_I(obits); \
+}
+
+// Copying verilog format from systemc integers and bit vectors.
+
+#define VL_ASSIGN_SII(obits,svar,vvar) { (svar).write(vvar); }
 #define VL_ASSIGN_SQQ(obits,svar,vvar) { (svar).write(vvar); }
 
-#define VL_ASSIGN_SQ(obits,svar,rd) { \
+#define VL_ASSIGN_SWI(obits,svar,rd) { \
+    sc_bv<obits> _bvtemp; \
+    _bvtemp.set_word(0,rd); \
+    svar.write(_bvtemp); \
+}
+#define VL_ASSIGN_SWQ(obits,svar,rd) { \
     sc_bv<obits> _bvtemp; \
     _bvtemp.set_word(0,rd); \
     _bvtemp.set_word(1,rd>>VL_WORDSIZE); \
     svar.write(_bvtemp); \
 }
-#define VL_ASSIGN_QS(obits,od,svar) { \
-    od = (((QData)svar.read().get_word(1))<<VL_WORDSIZE | svar.read().get_word(0)) \
-	& VL_MASK_Q(obits); \
-}
-
-#define VL_ASSIGN_SW(obits,svar,rwp) { \
+#define VL_ASSIGN_SWW(obits,svar,rwp) { \
     sc_bv<obits> _bvtemp; \
     for (int i=0; i < VL_WORDS_I(obits); i++) _bvtemp.set_word(i,rwp[i]); \
     svar.write(_bvtemp); \
 }
-#define VL_ASSIGN_WS(obits,owp,svar) { \
-    int words = VL_WORDS_I(obits); \
-    for (int i=0; i < words; i++) owp[i] = svar.read().get_word(i); \
-    owp[words-1] &= VL_MASK_I(obits); \
-}
 
 //===================================================================
 // Extending sizes
@@ -431,7 +451,7 @@ static inline QData VL_EXTENDS_QQ(int, int lbits, QData lhs) {
 
 static inline WDataOutP VL_EXTENDS_WI(int obits, int lbits, WDataOutP owp, IData ld) {
     IData sign = VL_SIGNONES_I(lbits,ld);
-    owp[0] = ld | sign & ~VL_MASK_I(lbits);
+    owp[0] = ld | (sign & ~VL_MASK_I(lbits));
     for (int i=1; i < VL_WORDS_I(obits); i++) owp[i] = sign;
     return(owp);
 }
@@ -446,7 +466,7 @@ static inline WDataOutP VL_EXTENDS_WW(int obits, int lbits, WDataOutP owp, WData
     for (int i=0; i < VL_WORDS_I(lbits)-1; i++) owp[i] = lwp[i];
     int lmsw=VL_WORDS_I(lbits)-1;
     IData sign = VL_SIGNONES_I(lbits,lwp[lmsw]);
-    owp[lmsw] = lwp[lmsw] | sign & ~VL_MASK_I(lbits);
+    owp[lmsw] = lwp[lmsw] | (sign & ~VL_MASK_I(lbits));
     for (int i=VL_WORDS_I(lbits); i < VL_WORDS_I(obits); i++) owp[i] = sign;
     return(owp);
 }
@@ -526,38 +546,6 @@ static inline IData VL_REDXOR_W(int words, WDataInP lwp) {
     return VL_REDXOR_32(r);
 }
 
-static inline IData VL_CLOG2_I(IData lhs) {
-    // Perhaps can do better using fls GCC4 builtins
-    int n=1;
-    IData chk;
-    if (!lhs) return 0;
-    chk = lhs >> VL_UL(16); if (chk) { n += 16; lhs = chk; }
-    chk = lhs >> VL_UL(8);  if (chk) { n += 8; lhs = chk; }
-    chk = lhs >> VL_UL(4);  if (chk) { n += 4; lhs = chk; }
-    chk = lhs >> VL_UL(2);  if (chk) { n += 2; lhs = chk; }
-    chk = lhs >> VL_UL(1);  if (chk) { n += 1; lhs = chk; }
-    return n;
-}
-static inline IData VL_CLOG2_Q(QData lhs) {
-    // Perhaps can do better using fls GCC4 builtins
-    int n=1;
-    QData chk;
-    if (!lhs) return 0;
-    chk = lhs >> VL_ULL(32); if (chk) { n += 32; lhs = chk; }
-    chk = lhs >> VL_ULL(16); if (chk) { n += 16; lhs = chk; }
-    chk = lhs >> VL_ULL(8);  if (chk) { n += 8; lhs = chk; }
-    chk = lhs >> VL_ULL(4);  if (chk) { n += 4; lhs = chk; }
-    chk = lhs >> VL_ULL(2);  if (chk) { n += 2; lhs = chk; }
-    chk = lhs >> VL_ULL(1);  if (chk) { n += 1; lhs = chk; }
-    return n;
-}
-static inline IData VL_CLOG2_W(int words, WDataInP lwp) {
-    for (int i=words-1; i>=0; i--) {
-	if (lwp[i]) return VL_CLOG2_I(lwp[i])+i*VL_WORDSIZE;
-    }
-    return 0;
-}
-
 // EMIT_RULE: VL_COUNTONES_II:  oclean = false; lhs clean
 static inline IData VL_COUNTONES_I(IData lhs) {
     // This is faster than __builtin_popcountl
@@ -612,6 +600,51 @@ static inline IData VL_ONEHOT0_W(int words, WDataInP lwp) {
     return 1;
 }
 
+static inline IData VL_CLOG2_I(IData lhs) {
+    // There are faster algorithms, or fls GCC4 builtins, but rarely used
+    if (!lhs) return 0;
+    lhs--;
+    int shifts=0;
+    for (; lhs!=0; shifts++) lhs = lhs >> 1;
+    return shifts;
+}
+static inline IData VL_CLOG2_Q(QData lhs) {
+    if (!lhs) return 0;
+    lhs--;
+    int shifts=0;
+    for (; lhs!=0; shifts++) lhs = lhs >> VL_ULL(1);
+    return shifts;
+}
+static inline IData VL_CLOG2_W(int words, WDataInP lwp) {
+    IData adjust = (VL_COUNTONES_W(words,lwp)==1) ? 0 : 1;
+    for (int i=words-1; i>=0; i--) {
+	if (VL_UNLIKELY(lwp[i])) {  // Shorter worst case if predict not taken
+	    for (int bit=31; bit>=0; bit--) {
+		if (VL_UNLIKELY(VL_BITISSET_I(lwp[i],bit))) {
+		    return i*VL_WORDSIZE + bit + adjust;
+		}
+	    }
+	    // Can't get here - one bit must be set
+	}
+    }
+    return 0;
+}
+
+static inline IData VL_MOSTSETBITP1_W(int words, WDataInP lwp) {
+    // MSB set bit plus one; similar to FLS.  0=value is zero
+    for (int i=words-1; i>=0; i--) {
+	if (VL_UNLIKELY(lwp[i])) {  // Shorter worst case if predict not taken
+	    for (int bit=31; bit>=0; bit--) {
+		if (VL_UNLIKELY(VL_BITISSET_I(lwp[i],bit))) {
+		    return i*VL_WORDSIZE + bit + 1;
+		}
+	    }
+	    // Can't get here - one bit must be set
+	}
+    }
+    return 0;
+}
+
 //===================================================================
 // SIMPLE LOGICAL OPERATORS
 
@@ -750,10 +783,12 @@ static inline int _VL_CMPS_W(int lbits, WDataInP lwp, WDataInP rwp) {
 // EMIT_RULE: VL_MUL:    oclean=dirty; lclean==clean; rclean==clean;
 // EMIT_RULE: VL_DIV:    oclean=dirty; lclean==clean; rclean==clean;
 // EMIT_RULE: VL_MODDIV: oclean=dirty; lclean==clean; rclean==clean;
-#define VL_DIV_I(lhs,rhs)	(((rhs)==0)?0:(lhs)/(rhs))
-#define VL_DIV_Q(lhs,rhs)	(((rhs)==0)?0:(lhs)/(rhs))
-#define VL_MODDIV_I(lhs,rhs)	(((rhs)==0)?0:(lhs)%(rhs))
-#define VL_MODDIV_Q(lhs,rhs)	(((rhs)==0)?0:(lhs)%(rhs))
+#define VL_DIV_III(lbits,lhs,rhs)	(((rhs)==0)?0:(lhs)/(rhs))
+#define VL_DIV_QQQ(lbits,lhs,rhs)	(((rhs)==0)?0:(lhs)/(rhs))
+#define VL_DIV_WWW(lbits,owp,lwp,rwp)   (_vl_moddiv_w(lbits,owp,lwp,rwp,0))
+#define VL_MODDIV_III(lbits,lhs,rhs)	(((rhs)==0)?0:(lhs)%(rhs))
+#define VL_MODDIV_QQQ(lbits,lhs,rhs)	(((rhs)==0)?0:(lhs)%(rhs))
+#define VL_MODDIV_WWW(lbits,owp,lwp,rwp) (_vl_moddiv_w(lbits,owp,lwp,rwp,1))
 
 static inline WDataOutP VL_ADD_W(int words, WDataOutP owp,WDataInP lwp,WDataInP rwp){
     QData carry = 0;
@@ -857,31 +892,70 @@ static inline WDataOutP VL_MULS_WWW(int,int lbits,int, WDataOutP owp,WDataInP lw
     return(owp);
 }
 
-static inline IData VL_DIVS_III(int,int lbits,int, IData lhs,IData rhs) {
+static inline IData VL_DIVS_III(int lbits, IData lhs,IData rhs) {
     if (rhs==0) return 0;
     vlsint32_t lhs_signed = VL_EXTENDS_II(32, lbits, lhs);
     vlsint32_t rhs_signed = VL_EXTENDS_II(32, lbits, rhs);
     return lhs_signed / rhs_signed;
 }
-static inline QData VL_DIVS_QQQ(int,int lbits,int, QData lhs,QData rhs) {
+static inline QData VL_DIVS_QQQ(int lbits, QData lhs,QData rhs) {
     if (rhs==0) return 0;
     vlsint64_t lhs_signed = VL_EXTENDS_QQ(64, lbits, lhs);
     vlsint64_t rhs_signed = VL_EXTENDS_QQ(64, lbits, rhs);
     return lhs_signed / rhs_signed;
 }
-static inline IData VL_MODDIVS_III(int,int lbits,int, IData lhs,IData rhs) {
+static inline IData VL_MODDIVS_III(int lbits, IData lhs,IData rhs) {
     if (rhs==0) return 0;
     vlsint32_t lhs_signed = VL_EXTENDS_II(32, lbits, lhs);
     vlsint32_t rhs_signed = VL_EXTENDS_II(32, lbits, rhs);
     return lhs_signed % rhs_signed;
 }
-static inline QData VL_MODDIVS_QQQ(int,int lbits,int, QData lhs,QData rhs) {
+static inline QData VL_MODDIVS_QQQ(int lbits, QData lhs,QData rhs) {
     if (rhs==0) return 0;
     vlsint64_t lhs_signed = VL_EXTENDS_QQ(64, lbits, lhs);
     vlsint64_t rhs_signed = VL_EXTENDS_QQ(64, lbits, rhs);
     return lhs_signed % rhs_signed;
 }
 
+static inline WDataOutP VL_DIVS_WWW(int lbits, WDataOutP owp,WDataInP lwp,WDataInP rwp) {
+    int words = VL_WORDS_I(lbits);
+    IData lsign = VL_SIGN_I(lbits,lwp[words-1]);
+    IData rsign = VL_SIGN_I(lbits,rwp[words-1]);
+    IData lwstore[VL_MULS_MAX_WORDS]; // Fixed size, as MSVC++ doesn't allow [words] here
+    IData rwstore[VL_MULS_MAX_WORDS];
+    WDataInP ltup = lwp;
+    WDataInP rtup = rwp;
+    if (lsign) { ltup = _VL_CLEAN_INPLACE_W(lbits, VL_UNARYMIN_W(VL_WORDS_I(lbits), lwstore, lwp)); }
+    if (rsign) { rtup = _VL_CLEAN_INPLACE_W(lbits, VL_UNARYMIN_W(VL_WORDS_I(lbits), rwstore, rwp)); }
+    if ((lsign && !rsign) || (!lsign && rsign)) {
+	IData qNoSign[VL_MULS_MAX_WORDS];
+	VL_DIV_WWW(lbits,qNoSign,ltup,rtup);
+	_VL_CLEAN_INPLACE_W(lbits, VL_UNARYMIN_W(VL_WORDS_I(lbits), owp, qNoSign));
+	return owp;
+    } else {
+	return VL_DIV_WWW(lbits,owp,ltup,rtup);
+    }
+}
+static inline WDataOutP VL_MODDIVS_WWW(int lbits, WDataOutP owp,WDataInP lwp,WDataInP rwp) {
+    int words = VL_WORDS_I(lbits);
+    IData lsign = VL_SIGN_I(lbits,lwp[words-1]);
+    IData rsign = VL_SIGN_I(lbits,rwp[words-1]);
+    IData lwstore[VL_MULS_MAX_WORDS]; // Fixed size, as MSVC++ doesn't allow [words] here
+    IData rwstore[VL_MULS_MAX_WORDS];
+    WDataInP ltup = lwp;
+    WDataInP rtup = rwp;
+    if (lsign) { ltup = _VL_CLEAN_INPLACE_W(lbits, VL_UNARYMIN_W(VL_WORDS_I(lbits), lwstore, lwp)); }
+    if (rsign) { rtup = _VL_CLEAN_INPLACE_W(lbits, VL_UNARYMIN_W(VL_WORDS_I(lbits), rwstore, rwp)); }
+    if (lsign) {  // Only dividend sign matters for modulus
+	IData qNoSign[VL_MULS_MAX_WORDS];
+	VL_MODDIV_WWW(lbits,qNoSign,ltup,rtup);
+	_VL_CLEAN_INPLACE_W(lbits, VL_UNARYMIN_W(VL_WORDS_I(lbits), owp, qNoSign));
+	return owp;
+    } else {
+	return VL_MODDIV_WWW(lbits,owp,ltup,rtup);
+    }
+}
+
 static inline IData VL_POW_III(int, int, int rbits, IData lhs, IData rhs) {
     if (lhs==0) return 0;
     IData power = lhs;
@@ -981,16 +1055,16 @@ static inline void _VL_INSERT_WW(int, WDataOutP owp, WDataInP lwp, int hbit, int
 	    {	// Lower word
 		int oword = lword+i;
 		IData d = lwp[i]<<loffset;
-		IData od = owp[oword] & ~linsmask | d & linsmask;
-		if (oword==hword) owp[oword] = owp[oword] & ~hinsmask | od & hinsmask;
+		IData od = (owp[oword] & ~linsmask) | (d & linsmask);
+		if (oword==hword) owp[oword] = (owp[oword] & ~hinsmask) | (od & hinsmask);
 		else owp[oword] = od;
 	    }
 	    {   // Upper word
 		int oword = lword+i+1;
 		if (oword <= hword) {
 		    IData d = lwp[i]>>nbitsonright;
-		    IData od = d & ~linsmask | owp[oword] & linsmask;
-		    if (oword==hword) owp[oword] = owp[oword] & ~hinsmask | od & hinsmask;
+		    IData od = (d & ~linsmask) | (owp[oword] & linsmask);
+		    if (oword==hword) owp[oword] = (owp[oword] & ~hinsmask) | (od & hinsmask);
 		    else owp[oword] = od;
 		}
 	    }
@@ -1178,12 +1252,12 @@ static inline IData VL_SHIFTRS_III(int obits, int, int, IData lhs, IData rhs) {
     // Note the C standard does not specify the >> operator as a arithmetic shift!
     IData sign    = -(lhs >> (obits-1)); // ffff_ffff if negative
     IData signext = ~(VL_MASK_I(obits) >> rhs);   // One with bits where we've shifted "past"
-    return (lhs >> rhs) | sign & VL_CLEAN_II(obits,obits,signext);
+    return (lhs >> rhs) | (sign & VL_CLEAN_II(obits,obits,signext));
 }
 static inline QData VL_SHIFTRS_QQI(int obits, int, int, QData lhs, IData rhs) {
     QData sign    = -(lhs >> (obits-1));
     QData signext = ~(VL_MASK_Q(obits) >> rhs);
-    return (lhs >> rhs) | sign & VL_CLEAN_QQ(obits,obits,signext);
+    return (lhs >> rhs) | (sign & VL_CLEAN_QQ(obits,obits,signext));
 }
 static inline WDataOutP VL_SHIFTRS_WWI(int obits,int,int,WDataOutP owp,WDataInP lwp, IData rd) {
     int word_shift = VL_BITWORD_I(rd);
@@ -1354,61 +1428,59 @@ static inline WDataOutP VL_COND_WIWW(int obits, int, int, int,
 
 // If changing the number of functions here, also change EMITCINLINES_NUM_CONSTW
 
-#define I IData
 #define _END(obits,wordsSet) \
     for(int i=(wordsSet);i<VL_WORDS_I(obits);i++) o[i] = (IData)0x0; \
     return o
 
 #define VL_HAVE_CONST_W_1X
 static inline WDataOutP VL_CONST_W_1X(int obits, WDataOutP o,
-				      I d0) {
+				      IData d0) {
     o[0]=d0;
     _END(obits,1);  }
 #define VL_HAVE_CONST_W_2X
 static inline WDataOutP VL_CONST_W_2X(int obits, WDataOutP o,
-				      I d1,I d0) {
+				      IData d1,IData d0) {
     o[0]=d0;  o[1]=d1;
     _END(obits,2);  }
 #define VL_HAVE_CONST_W_3X
 static inline WDataOutP VL_CONST_W_3X(int obits, WDataOutP o,
-				      I d2,I d1,I d0) {
+				      IData d2,IData d1,IData d0) {
     o[0]=d0;  o[1]=d1;  o[2]=d2;
     _END(obits,3);  }
 #define VL_HAVE_CONST_W_4X
 static inline WDataOutP VL_CONST_W_4X(int obits, WDataOutP o,
-				      I d3,I d2,I d1,I d0) {
+				      IData d3,IData d2,IData d1,IData d0) {
     o[0]=d0;  o[1]=d1;  o[2]=d2;  o[3]=d3;
     _END(obits,4);  }
 #define VL_HAVE_CONST_W_5X
 static inline WDataOutP VL_CONST_W_5X(int obits, WDataOutP o,
-				      I d4,I d3,I d2,I d1,I d0) {
+				      IData d4,IData d3,IData d2,IData d1,IData d0) {
     o[0]=d0;  o[1]=d1;  o[2]=d2;  o[3]=d3;  o[4]=d4;
     _END(obits,5);  }
 #define VL_HAVE_CONST_W_6X
 static inline WDataOutP VL_CONST_W_6X(int obits, WDataOutP o,
-				      I d5,I d4,I d3,I d2,I d1,I d0) {
+				      IData d5,IData d4,IData d3,IData d2,IData d1,IData d0) {
     o[0]=d0;  o[1]=d1;  o[2]=d2;  o[3]=d3;  o[4]=d4;  o[5]=d5;
     _END(obits,6);  }
 #define VL_HAVE_CONST_W_7X
 static inline WDataOutP VL_CONST_W_7X(int obits, WDataOutP o,
-				      I d6,I d5,I d4,I d3,I d2,I d1,I d0) {
+				      IData d6,IData d5,IData d4,IData d3,IData d2,IData d1,IData d0) {
     o[0]=d0;  o[1]=d1;  o[2]=d2;  o[3]=d3;  o[4]=d4;  o[5]=d5;  o[6]=d6;
     _END(obits,7);  }
 #define VL_HAVE_CONST_W_8X
 static inline WDataOutP VL_CONST_W_8X(int obits, WDataOutP o,
-				      I d7,I d6,I d5,I d4,I d3,I d2,I d1,I d0) {
+				      IData d7,IData d6,IData d5,IData d4,IData d3,IData d2,IData d1,IData d0) {
     o[0]=d0;  o[1]=d1;  o[2]=d2;  o[3]=d3;  o[4]=d4;  o[5]=d5;  o[6]=d6;  o[7]=d7;
     _END(obits,8);  }
 #define VL_HAVE_CONST_W_9X
 static inline WDataOutP VL_CONST_W_9X(int obits, WDataOutP o,
-				      I d8,
-				      I d7,I d6,I d5,I d4,I d3,I d2,I d1,I d0) {
+				      IData d8,
+				      IData d7,IData d6,IData d5,IData d4,IData d3,IData d2,IData d1,IData d0) {
     o[0]=d0;  o[1]=d1;  o[2]=d2;  o[3]=d3;  o[4]=d4;  o[5]=d5;  o[6]=d6;  o[7]=d7;
     o[8]=d8;
     _END(obits,9);  }
 
 #undef _END
-#undef I
 
 // Debugging
 

include/verilated.mk.in

@@ -2,9 +2,9 @@
 ######################################################################
 # DESCRIPTION: Makefile commands for all verilated target files
 #
-# Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
-# Lesser General Public License or the Perl Artistic License.
+# Copyright 2003-2009 by Wilson Snyder. Verilator is free software; you can
+# redistribute it and/or modify it under the terms of either the GNU Lesser
+# General Public License Version 3 or the Perl Artistic License Version 2.0.
 ######################################################################
 
 PERL = @PERL@
@@ -89,8 +89,8 @@ endif
 ##### SystemPerl builds
 
 ifeq ($(VM_SP),1)
-  CPPFLAGS += -I$(SYSTEMPERL)/src -DSYSTEMPERL
-  VPATH    +=   $(SYSTEMPERL)/src
+  CPPFLAGS += -I$(SYSTEMPERL_INCLUDE) -DSYSTEMPERL
+  VPATH    +=   $(SYSTEMPERL_INCLUDE)
   LIBS   += -lm -lstdc++
 
   VK_CLASSES_SP = $(addsuffix .sp, $(VM_CLASSES))
@@ -110,8 +110,8 @@ endif
 ifeq ($(VM_SC),1)
   LIBS   += -lm -lstdc++
  ifeq ($(VM_TRACE),1)
-  CPPFLAGS += -I$(SYSTEMPERL)/src
-  VPATH    +=   $(SYSTEMPERL)/src
+  CPPFLAGS += -I$(SYSTEMPERL_INCLUDE)
+  VPATH    +=   $(SYSTEMPERL_INCLUDE)
  endif
 endif
 
@@ -121,8 +121,8 @@ endif
 ifeq ($(VM_PCLI),1)
   LIBS   += -lm -lstdc++
  ifeq ($(VM_TRACE),1)
-  CPPFLAGS += -I$(SYSTEMPERL)/src
-  VPATH    +=   $(SYSTEMPERL)/src
+  CPPFLAGS += -I$(SYSTEMPERL_INCLUDE)
+  VPATH    +=   $(SYSTEMPERL_INCLUDE)
  endif
 endif
 

include/verilated.v

@@ -5,9 +5,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License.
+// Version 2.0.
 //
 // This is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

include/verilatedos.h

@@ -1,9 +1,10 @@
 // -*- C++ -*-
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder. This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License.
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -86,10 +87,10 @@ typedef long  			vlsint32_t;	///< 32-bit signed type
 typedef unsigned long           vluint32_t;	///< 32-bit unsigned type
 typedef long long		vlsint64_t;	///< 64-bit signed type
 typedef unsigned long long      vluint64_t;	///< 64-bit unsigned type
-#elif defined(_WIN32) && !defined(__MINGW32__)
+#elif defined(_WIN32) && defined(_MSC_VER)
 typedef unsigned char           uint8_t;	///< 8-bit unsigned type (backward compatibility)
 typedef unsigned short int      uint16_t;	///< 16-bit unsigned type (backward compatibility)
-typedef unsigned long           uint32_t;	///< 32-bit unsigned type (backward compatibility)
+typedef unsigned int		uint32_t;	///< 32-bit unsigned type (backward compatibility)
 typedef unsigned char           vluint8_t;	///< 8-bit unsigned type
 typedef unsigned short int      vluint16_t;	///< 16-bit unsigned type
 typedef int			vlsint32_t;	///< 32-bit signed type

include/verilatedsc.h

@@ -0,0 +1,51 @@
+// -*- C++ -*-
+//*************************************************************************
+//
+// Copyright 2009-2009 by Wilson Snyder. This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License.
+// Version 2.0.
+//
+// Verilator is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+//*************************************************************************
+///
+/// \file
+/// \brief Verilator: Common include for all Verilated SystemC files
+///
+///	This file is included automatically by Verilator at the top of
+///	all SystemC files it generates.
+///
+/// Code available from: http://www.veripool.org/verilator
+///
+//*************************************************************************
+
+
+#ifndef _VERILATEDSC_H_
+#define _VERILATEDSC_H_ 1 ///< Header Guard
+
+#include "verilatedos.h"
+#include "systemc.h"
+
+//=============================================================================
+// VL_SC_BV_DATAP
+// We want to get a pointer to m_data in the sc_bv_base class,
+// but it is protected.  So make an exposing class, then use
+// cast magic to get at it.  Saves patching get_datap in SystemC.
+
+#define VL_SC_BV_DATAP(bv) (VlScBvExposer::sp_datap(bv))
+class VlScBvExposer : public sc_bv_base {
+public:
+    static uint32_t* sp_datap(const sc_bv_base& base) {
+	return static_cast<const VlScBvExposer*>(&base)->sp_datatp(); }
+    uint32_t* sp_datatp() const { return (uint32_t*)(m_data); }
+    // Above reads this protected element in sc_bv_base:
+    //   sc_digit* m_data; // data array
+};
+
+//=========================================================================
+
+#endif // guard

nodist/bisondiff

@@ -0,0 +1,85 @@
+#!/usr/bin/perl -w
+######################################################################
+#
+# Copyright 2007-2009 by Wilson Snyder.  This package is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+######################################################################
+
+# DESCRIPTION: Diff bison files
+
+use Getopt::Long;
+use IO::File;
+use strict;
+
+our $Debug;
+our $Opt_Unsup;
+
+if (! GetOptions (
+	  #"help"	=> \&usage,
+	  "debug"	=> sub { $Debug = 1; },
+	  "unsup!"	=> \$Opt_Unsup,		# Ignore unsupported
+    )) {
+    die "usage();"
+}
+
+diff($ARGV[0],$ARGV[1]);
+
+sub diff {
+    my $a=shift;
+    my $b=shift;
+
+    my $ta = "/tmp/bisondiff.$$.a";
+    my $tb = "/tmp/bisondiff.$$.b";
+
+    prep($a,$ta);
+    prep($b,$tb);
+
+    system("diff -u -w $ta $tb");
+}
+
+sub prep {
+    my $filename = shift;
+    my $wfilename = shift;
+
+    my $fh = IO::File->new("<$filename") or die "%Error: $! $filename";
+    my $fho = IO::File->new(">$wfilename") or die "%Error: $! writing $wfilename";
+
+    my %declared;
+    my %used;
+
+    my $body = 0;
+    my $rule = "";
+    my $skip = 1;
+    while (defined(my $line = $fh->getline)) {
+	if ($skip == 1) {
+	    next if $line !~ /%token/;
+	    $skip = 2;
+	}
+
+	if ($Opt_Unsup) {
+	    $line =~ s!//UNSUP!|!g;
+	    $line =~ s!(\s+)\|(\s+)!$1$2!g;  # As "UNSUP" often replaces "|"
+	}
+
+	# %type<foo>
+	$line =~ s/^(%\S+)<(\S+)>/$1/;
+	# rule<foo>
+	$line =~ s/^([a-zA-Z0-9_]+)<\S+>:/$1:/;
+	# Productions
+	$line =~ s/[ \t]{[^}]*?}/\t{}/g;
+
+	$fho->print($line);
+    }
+}
+
+# Local Variables:
+# compile-command: "./bisondiff --unsup $WUP/Verilog/Parser/VParseBison.y ../src/verilog.y"
+# End:

nodist/bisonreader

@@ -1,21 +1,16 @@
 #!/usr/bin/perl -w
 ######################################################################
 #
-# Copyright 2007-2008 by Wilson Snyder.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of either the GNU General Public License or the
-# Perl Artistic License.
+# Copyright 2007-2009 by Wilson Snyder.  This package is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
-# You should have received a copy of the Perl Artistic License
-# along with this module; see the file COPYING.  If not, see
-# www.cpan.org
-#
 ######################################################################
 
 # DESCRIPTION: Debugging of bison output
@@ -42,8 +37,8 @@ foreach my $line (<STDIN>) {
 	$rule .= $line;
 	if ($line =~ m!^\s*;\s*$!) {
 	    #print "Rule: $rule\n";
-	    ($rule =~ /^([a-zA-Z0-9_]+):(.*)$/) or die "%Error: No rule name: $1\n";
-	    my $rulename = $1; my $preaction = $2;
+	    ($rule =~ /^([a-zA-Z0-9_]+)(<\S+>)?:(.*)$/) or die "%Error: No rule name: $1\n";
+	    my $rulename = $1; my $preaction = $3;
 	    $declared{$rulename} = $lineno;
 	    $preaction =~ s/\{[^\}]*\}/ /g;
 	    #print "RULEN $rulename PA $preaction\n" if $Debug;
@@ -62,5 +57,5 @@ foreach my $line (<STDIN>) {
 }
 
 # Local Variables:
-# compile-command: "./bisonreader < verilog.y"
+# compile-command: "./bisonreader < ../src/verilog.y"
 # End:

nodist/dot_importer

@@ -143,9 +143,9 @@ Displays this message and program version and exits.
 
 =head1 DISTRIBUTION
 
-Copyright 2005-2008 by Wilson Snyder.  This package is free software; you
-can redistribute it and/or modify it under the terms of either the GNU
-Lesser General Public License or the Perl Artistic License.
+Copyright 2005-2009 by Wilson Snyder.  Verilator is free software; you can
+redistribute it and/or modify it under the terms of either the GNU Lesser
+General Public License Version 3 or the Perl Artistic License Version 2.0.
 
 =head1 AUTHORS
 

nodist/dot_pruner

@@ -184,9 +184,9 @@ Displays this message and program version and exits.
 
 =head1 DISTRIBUTION
 
-Copyright 2005-2008 by Wilson Snyder.  This package is free software; you
-can redistribute it and/or modify it under the terms of either the GNU
-Lesser General Public License or the Perl Artistic License.
+Copyright 2005-2009 by Wilson Snyder.  Verilator is free software; you can
+redistribute it and/or modify it under the terms of either the GNU Lesser
+General Public License Version 3 or the Perl Artistic License Version 2.0.
 
 =head1 AUTHORS
 

nodist/flexdiff

@@ -0,0 +1,61 @@
+#!/usr/bin/perl -w
+######################################################################
+#
+# Copyright 2007-2009 by Wilson Snyder.  This package is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+######################################################################
+
+# DESCRIPTION: Diff flex files
+
+use IO::File;
+use strict;
+
+my $Debug;
+
+diff($ARGV[0],$ARGV[1]);
+
+sub diff {
+    my $a=shift;
+    my $b=shift;
+
+    my $ta = "/tmp/flexdiff.$$.a";
+    my $tb = "/tmp/flexdiff.$$.b";
+
+    prep($a,$ta);
+    prep($b,$tb);
+
+    system("diff -u -w $ta $tb");
+}
+
+sub prep {
+    my $filename = shift;
+    my $wfilename = shift;
+
+    my $fh = IO::File->new("<$filename") or die "%Error: $! $filename";
+    my $fho = IO::File->new(">$wfilename") or die "%Error: $! writing $wfilename";
+
+    my %declared;
+    my %used;
+    my @lines;
+
+    while (defined(my $line = $fh->getline)) {
+	# Productions
+	$line =~ s/[ \t]{[^}]*?}/\t{}/g;
+	push @lines, $line;
+    }
+
+    #@lines = sort @lines;
+    $fho->print(@lines);
+}
+
+# Local Variables:
+# compile-command: "./flexdiff $WUP/Verilog/Parser/VParseLex.l ../src/verilog.l"
+# End:

nodist/invoke_iccr

@@ -40,9 +40,10 @@ invoke_iccr - Invoke tool under "modules" command
 
 =head1 DISTRIBUTION
 
-Copyright 2007-2008 by Wilson Snyder.  This package is free software; you
+Copyright 2007-2009 by Wilson Snyder.  This package is free software; you
 can redistribute it and/or modify it under the terms of either the GNU
-Lesser General Public License or the Perl Artistic License.
+Lesser General Public License Version 3 or the Perl Artistic License
+Version 2.0.
 
 =head1 AUTHORS
 

nodist/invoke_ncverilog

@@ -40,9 +40,10 @@ invoke_ncverilog - Invoke tool under "modules" command
 
 =head1 DISTRIBUTION
 
-Copyright 2007-2008 by Wilson Snyder.  This package is free software; you
+Copyright 2005-2009 by Wilson Snyder.  This package is free software; you
 can redistribute it and/or modify it under the terms of either the GNU
-Lesser General Public License or the Perl Artistic License.
+Lesser General Public License Version 3 or the Perl Artistic License
+Version 2.0.
 
 =head1 AUTHORS
 

nodist/vtree_importer

@@ -331,9 +331,9 @@ Displays this message and program version and exits.
 
 =head1 DISTRIBUTION
 
-Copyright 2005-2008 by Wilson Snyder.  This package is free software; you
-can redistribute it and/or modify it under the terms of either the GNU
-Lesser General Public License or the Perl Artistic License.
+Copyright 2005-2009 by Wilson Snyder.  Verilator is free software; you can
+redistribute it and/or modify it under the terms of either the GNU Lesser
+General Public License Version 3 or the Perl Artistic License Version 2.0.
 
 =head1 AUTHORS
 

readme.texi

@@ -26,13 +26,17 @@ This is the Verilator Package.
 @node Copyright, Description, Top, Top
 @section Copyright
 
-This package is Copyright 2003-2008 by Wilson Snyder @email{wsnyder@@wsnyder.org}.
+This package is Copyright 2003-2009 by Wilson Snyder @email{wsnyder@@wsnyder.org}.
 
-You may distribute under the terms of either the GNU General Public License
-or the Artistic License, as specified in the Perl README file.
+Verilator is free software; you can redistribute it and/or modify it
+under the terms of either the GNU Lesser General Public License
+Version 3 or the Perl Artistic License Version 2.0.  (See the
+documentation for more details.)
 
-This code is provided with no warranty of any kind, and is used entirely at
-your own risk.
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
 
 @node Description, Obtaining Distribution, Copyright, Top
 @section Description
@@ -116,8 +120,8 @@ If you will be using SystemC, download and install Verilog-Perl,
 If you will be using SystemC, download and install System-Perl,
 @url{http://search.cpan.org/search?module=SystemC::Netlist}.  Note
 you'll need to set a @samp{SYSTEMPERL} environment variable to point
-to the downloaded kit (not the installed files.)  Also, make sure to
-do a @code{make sc_patch}.
+to the downloaded kit.  Optionally also set @samp{SYSTEMPERL_INCLUDE}
+to point to the installed headers.
 
 @item
 @code{cd} to the Verilator directory containing this README.
@@ -128,8 +132,8 @@ Type @samp{./configure} to configure Verilator for your system.
 If you are configuring Verilator to be part of a RPM or other
 distribution package system, you may want to use the --enable-defenv
 configure flag.  This will take the current value of VERILATOR_ROOT,
-SYSTEMC, SYSTEMC_ARCH, and SYSTEMPERL and build them as defaults into
-the executable.
+SYSTEMC, SYSTEMC_ARCH, SYSTEMPERL, and SYSTEMPERL_INCLUDE and build
+them as defaults into the executable.
 
 @item
 Type @samp{make} to compile Verilator.

src/.gitignore

@@ -1,3 +1,4 @@
+*~
 *.old
 config_build.h
 Makefile

src/0CodeNotes.pod

@@ -0,0 +1,70 @@
+=pod
+
+=head1 NAME
+
+Verilator Source Code Notes
+
+=head1 INTRODUCTION
+
+See also the Verilator internals presentation at http://www.veripool.org.
+
+=head1 VISITOR FUNCTIONS
+
+=head2 Passing Variables
+
+There's three ways data is passed between visitor functions.
+
+1. A visitor-class member variable.  This is generally for passing "parent"
+information down to children.  m_modp is a common example.  It's set to
+NULL in the constructor, where that node (AstModule visitor) sets it, then
+the children are iterated, then it's cleared.  Children under an AstModule
+will see it set, while nodes elsewhere will see it clear.  If there can be
+nested items (for example an AstFor under an AstFor) the variable needs to
+be save-set-restored in the AstFor visitor, otherwise exiting the lower for
+will loose the upper for's setting.
+
+2. User() attributes.  Each node has 4 ->user() number or ->userp() pointer
+utility values (a common technique lifted from graph traversal packages).
+A visitor first clears the one it wants to use by calling
+AstNode::user#ClearTree(), then it can mark any node's user() with whatever
+data it wants.  Readers just call nodep->user(), but may need to cast
+appropriately, so you'll often see nodep->userp()->castSOMETYPE().  At the
+top of each visitor are comments describing how the user() stuff applies to
+that visitor class.  For example:
+
+    // NODE STATE
+    // Cleared entire netlist
+    //   AstModule::user1p()     // bool. True to inline this module
+
+This says that at the AstNetlist user1ClearTree() is called.  Each
+AstModule's is user1() is used to indicate if we're going to inline it.
+
+These comments are important to make sure a user#() on a given AstNode type
+is never being used for two different purposes.
+
+Note that calling user#ClearTree is fast, it doesn't walk the tree, so it's
+ok to call fairly often.  For example, it's commonly called on every
+module.
+
+3. Parameters can be passed between the visitors in close to the "normal"
+function caller to callee way.  This is the second "vup" parameter that is
+ignored on most of the visitor functions.  V3Width does this, but it proved
+more messy than the above and is deprecated.  (V3Width was nearly the first
+module written.  Someday this scheme may be removed, as it slows the
+program down to have to pass vup everywhere.)
+
+=head1 DEBUGGING WITH GDB
+
+The test_regress/driver.pl script accepts --gdb to start Verilator under
+gdb.
+
+To break at a specific edit number which changed a node (presumably to find
+what made a <e####> line in the tree dumps):
+
+   watch AstNode::s_editCntGbl==####
+
+=head1 DISTRIBUTION
+
+Copyright 2008-2009 by Wilson Snyder.  Verilator is free software; you can
+redistribute it and/or modify it under the terms of either the GNU Lesser
+General Public License Version 3 or the Perl Artistic License Version 2.0.

src/Makefile.in

@@ -7,9 +7,10 @@
 #
 #*****************************************************************************
 #
-# Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+# Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 # redistribute it and/or modify it under the terms of either the GNU
-# General Public License or the Perl Artistic License.
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
 #
 # Verilator is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -46,7 +47,7 @@ export OBJCACHE_JOBS := -j $(shell objcache --jobs "$(OBJCACHE_HOSTS)")
 export OBJCACHE := @objcache --read --write
 endif
 
-UNDER_GIT = $(wildcard ../.git)
+UNDER_GIT = $(wildcard ../.git/logs/HEAD)
 
 #*********************************************************************
 
@@ -78,7 +79,7 @@ prefiles::
 ifneq ($(UNDER_GIT),)	# If local git tree... Else don't burden users
 prefiles:: config_rev.h
 # This output goes into srcdir, as we need to distribute it as part of the kit.
-config_rev.h:	config_rev.pl ../.git/index
+config_rev.h:	config_rev.pl ../.git/logs/HEAD
 	$(PERL) config_rev.pl . >$@
 endif
 
@@ -87,7 +88,6 @@ clean mostlyclean distclean maintainer-clean::
 	-rm -rf obj_* *.log *.dmp *.vpd core
 	-rm -f *.o *.d perlxsi.c *_gen_*
 	-rm -f *__gen*
-	-rm -f *.yy.* y.output y.tab.[cho] *_test
 	-rm -f .objcache*
 
 distclean maintainer-clean::

src/Makefile_obj.in

@@ -7,9 +7,10 @@
 #
 #*****************************************************************************
 #
-# Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+# Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 # redistribute it and/or modify it under the terms of either the GNU
-# General Public License or the Perl Artistic License.
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
 #
 # Verilator is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -81,12 +82,19 @@ CPPFLAGS += -W -Wall -Wno-unused-parameter -Wno-char-subscripts -Werror
 #CPPFLAGS += -pedantic-errors
 endif
 
+ifneq ($(SYSTEMPERL),)	# Intuit SYSTEMPERL_INCLUDE as it's new
+ SYSTEMPERL_INCLUDE ?= $(SYSTEMPERL)/src
+#else if set, leave as-is.
+#else if SYSTEMPERL="" don't set _INCLUDE so source will figure it out
+endif
+
 # Allow RPM builds to specify hardcoded data directories
 # To do this:
 ifeq ($(CFG_WITH_DEFENV),yes)
  CPPFLAGS += -DDEFENV_SYSTEMC=\"$(SYSTEMC)\"
  CPPFLAGS += -DDEFENV_SYSTEMC_ARCH=\"$(SYSTEMC_ARCH)\"
  CPPFLAGS += -DDEFENV_SYSTEMPERL=\"$(SYSTEMPERL)\"
+ CPPFLAGS += -DDEFENV_SYSTEMPERL_INCLUDE=\"$(SYSTEMPERL_INCLUDE)\"
  ifeq ($(VERILATOR_ROOT),)	# Use what we're given, or intuit
   CPPFLAGS += -DDEFENV_VERILATOR_ROOT=\"$(pkgdatadir)\"
  else
@@ -110,7 +118,6 @@ make_info:
 clean mostlyclean distclean maintainer-clean::
 	-rm -f *.o *.d perlxsi.c *_gen_*
 	-rm -f *__gen*
-	-rm -f *.yy.* y.output y.tab.[cho] *_test
 	-rm -f obj_* .objcache*
 
 distclean maintainer-clean:: clean
@@ -136,10 +143,12 @@ RAW_OBJS = \
 	V3Cast.o \
 	V3Changed.o \
 	V3Clean.o \
+	V3ClkGater.o \
 	V3Clock.o \
 	V3Combine.o \
 	V3Const__gen.o \
 	V3Coverage.o \
+	V3CoverageJoin.o \
 	V3Dead.o \
 	V3Delayed.o \
 	V3Depth.o \
@@ -191,9 +200,11 @@ RAW_OBJS = \
 	V3Task.o \
 	V3Trace.o \
 	V3TraceDecl.o \
+	V3Tristate.o \
 	V3Unknown.o \
 	V3Unroll.o \
 	V3Width.o \
+	V3WidthSel.o \
 
 # Non-concatable
 OBJS += \
@@ -218,15 +229,15 @@ $(TGT): V3Ast__gen_classes.h $(OBJS)
 	@echo "      Linking $@..."
 	-rm -rf $@ [email protected]
 	${LINK} ${LDFLAGS} -o $@ $(OBJS) $(CCMALLOC) ${LIBS}
-	@-cp [email protected] $@
-# ok if cp failes on linux, it's there to insure make works on NT
+	@-(cp [email protected] $@ || true)
+# ok if cp failes on linux, it's there to insure executable works on NT
 
 V3Number_test: V3Number_test.o
 	${LINK} ${LDFLAGS} -o $@ $^ ${LIBS}
 
 #### Modules
 
-%__gen.cpp:	%.cpp $(ASTGEN)
+%__gen.cpp:	%.cpp $(ASTGEN) V3Ast.h V3AstNodes.h
 	$(PERL) $(ASTGEN) -I$(srcdir) $*.cpp
 
 %.o:	%.cpp
@@ -234,10 +245,10 @@ V3Number_test: V3Number_test.o
 %.o:	%.c
 	$(OBJCACHE) ${CC}  ${CPPFLAGS} -c $<
 
-V3Read.o:	V3Read.cpp V3Lexer.yy.cpp
+V3Read.o:	V3Read.cpp V3Lexer.yy.cpp V3ParseBison.c
 	$(OBJCACHE) ${CXX} ${CPPFLAGSNOWALL} -c $<
 
-V3Parse.o:	V3Parse.cpp y.tab.c
+V3Parse.o:	V3Parse.cpp V3ParseBison.c
 	$(OBJCACHE) ${CXX} ${CPPFLAGSNOWALL} -c $<
 
 V3PreProc.o:	V3PreProc.cpp V3PreLex.yy.cpp
@@ -246,25 +257,27 @@ V3PreProc.o:	V3PreProc.cpp V3PreLex.yy.cpp
 #### Generated files
 
 # Target rule called before parallel build to make generated files
-serial:: V3Ast__gen_classes.h y.tab.c
+serial:: V3Ast__gen_classes.h V3ParseBison.c
 
 V3Ast__gen_classes.h : $(ASTGEN) V3Ast.h V3AstNodes.h
 	$(PERL) $(ASTGEN) -I$(srcdir)  --classes
 
-y.tab.h: y.tab.c
+V3ParseBison.h: V3ParseBison.c
 
 # Have only one output file in this rule to prevent parallel make issues
-y.tab.c: verilog.y $(HEADERS) bisonpre
+V3ParseBison.c: verilog.y $(BISONPRE)
 	@echo "If you get errors from verilog.y below, try upgrading bison to version 1.875 or newer."
-	$(PERL) $(BISONPRE) --yacc ${YACC} -d -v -o y.tab.c $<
+	$(PERL) $(BISONPRE) --yacc ${YACC} -d -v -o V3ParseBison.c $<
 
-V3Lexer_pregen.yy.cpp:	verilog.l y.tab.h $(HEADERS)
+V3Lexer_pregen.yy.cpp:	verilog.l V3ParseBison.h $(HEADERS)
+	${LEX} --version
 	${LEX} ${LFLAGS} -o$@ $<
 
 V3Lexer.yy.cpp:	V3Lexer_pregen.yy.cpp
 	$(PERL) $(srcdir)/flexfix <$< >$@
 
 V3PreLex_pregen.yy.cpp:	V3PreLex.l $(HEADERS)
+	${LEX} --version
 	${LEX} ${LFLAGS} -o$@ $<
 
 V3PreLex.yy.cpp:	V3PreLex_pregen.yy.cpp
@@ -277,4 +290,3 @@ DEPS := $(wildcard *.d)
 ifneq ($(DEPS),)
 include $(DEPS)
 endif
-

src/V3Active.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -43,6 +44,7 @@
 #include "V3Active.h"
 #include "V3Ast.h"
 #include "V3EmitCBase.h"
+#include "V3Const.h"
 
 //***** See below for main transformation engine
 
@@ -51,7 +53,11 @@
 
 class ActiveBaseVisitor : public AstNVisitor {
 protected:
-    //int debug() { return 9; }
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
 };
 
 class ActiveNamer : public ActiveBaseVisitor {
@@ -77,8 +83,8 @@ private:
 	// Don't clear scopep, the namer persists beyond this visit
     }
     virtual void visit(AstSenTree* nodep, AstNUser*) {
-	// Sort sensitivity list
-	nodep->sortSenses();
+	// Simplify sensitivity list
+	V3Const::constifyExpensiveEdit(nodep); nodep=NULL;
     }
     // Empty visitors, speed things up
     virtual void visit(AstNodeStmt* nodep, AstNUser*) { }
@@ -129,7 +135,7 @@ public:
       found:
 	// Not found, form a new one
 	if (!activep) {
-	    AstSenTree* newsenp = sensesp->cloneTree(false)->castSenTree();
+	    AstSenTree* newsenp = sensesp->cloneTree(false);
 	    activep = new AstActive(fl, "sequent", newsenp);
 	    activep->sensesStorep(activep->sensesp());
 	    UINFO(8,"    New ACTIVE "<<activep<<endl);
@@ -185,10 +191,15 @@ public:
 class ActiveVisitor : public ActiveBaseVisitor {
 private:
     // NODE STATE
+    //  Each call to V3Const::constify
+    //   AstNode::user4()		Used by V3Const::constify, called below
 
     // STATE
     ActiveNamer	m_namer;	// Tracking of active names
     AstCFunc*   m_scopeFinalp;	// Final function for this scope
+    AstAlways*	m_alwaysp;	// Under always
+    bool	m_itemCombo;	// Found a SenItem combo
+    bool	m_itemSequent;	// Found a SenItem sequential
 
     // VISITORS
     virtual void visit(AstScope* nodep, AstNUser*) {
@@ -223,6 +234,13 @@ private:
 	nodep->unlinkFrBack();
 	wantactivep->addStmtsp(nodep);
     }
+    virtual void visit(AstCoverToggle* nodep, AstNUser*) {
+	// Relink to CACTIVE, unless already under it
+	UINFO(4,"    COVERTOGGLE "<<nodep<<endl);
+	AstActive* wantactivep = m_namer.getCActive(nodep->fileline());
+	nodep->unlinkFrBack();
+	wantactivep->addStmtsp(nodep);
+    }
     virtual void visit(AstFinal* nodep, AstNUser*) {
 	// Relink to CFUNC for the final
 	UINFO(4,"    FINAL "<<nodep<<endl);
@@ -245,6 +263,7 @@ private:
 	nodep->deleteTree(); nodep = NULL;
     }
 
+    // METHODS
     virtual void visit(AstAlways* nodep, AstNUser*) {
 	// Move always to appropriate ACTIVE based on its sense list
 	UINFO(4,"    ALW   "<<nodep<<endl);
@@ -255,7 +274,10 @@ private:
 	    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
 	    return;
 	}
-	if (nodep->sensesp() && nodep->sensesp()->sensesp() && nodep->sensesp()->sensesp()->isNever()) {
+	if (nodep->sensesp()
+	    && nodep->sensesp()->sensesp()
+	    && nodep->sensesp()->sensesp()->castSenItem()
+	    && nodep->sensesp()->sensesp()->castSenItem()->isNever()) {
 	    // Never executing.  Kill it.
 	    if (nodep->sensesp()->sensesp()->nextp()) nodep->v3fatalSrc("Never senitem should be alone, else the never should be eliminated.");
 	    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
@@ -263,24 +285,14 @@ private:
 	}
 
 	// Read sensitivitues
-	bool combo = false;
-	bool sequent = false;
-	if (nodep->sensesp()) {
-	    for (AstSenItem* nextp, *senp = nodep->sensesp()->sensesp(); senp; senp=nextp) {
-		nextp = senp->nextp()->castSenItem();
-		if (senp->edgeType() == AstEdgeType::ANYEDGE) {
-		    combo = true;
-		    // Delete the sensitivity
-		    // We'll add it as a generic COMBO SenItem in a moment.
-		    senp->unlinkFrBack()->deleteTree(); senp=NULL;
-		} else if (senp->varrefp()) {
-		    if (senp->varrefp()->width()>1) senp->v3error("Unsupported: Non-single bit wide signal pos/negedge sensitivity: "
-								  <<senp->varrefp()->prettyName());
-		    sequent = true;
-		    senp->varrefp()->varp()->usedClock(true);
-		}
-	    }
-	}
+	m_alwaysp = nodep;
+	m_itemCombo = false;
+	m_itemSequent = false;
+	nodep->sensesp()->iterateAndNext(*this);
+	m_alwaysp = NULL;
+	bool combo = m_itemCombo;
+	bool sequent = m_itemSequent;
+
 	if (!combo && !sequent) combo=true;	// If no list, Verilog 2000: always @ (*)
 #ifndef NEW_ORDERING
 	if (combo && sequent) {
@@ -319,6 +331,29 @@ private:
 	    ActiveDlyVisitor dlyvisitor (nodep);
 	}
     }
+    virtual void visit(AstSenGate* nodep, AstNUser*) {
+	AstSenItem* subitemp = nodep->sensesp();
+	if (subitemp->edgeType() != AstEdgeType::ANYEDGE
+	    && subitemp->edgeType() != AstEdgeType::POSEDGE
+	    && subitemp->edgeType() != AstEdgeType::NEGEDGE) {
+	    nodep->v3fatalSrc("Strange activity type under SenGate");
+	}
+	nodep->iterateChildren(*this);
+    }
+    virtual void visit(AstSenItem* nodep, AstNUser*) {
+	if (nodep->edgeType() == AstEdgeType::ANYEDGE) {
+	    m_itemCombo = true;
+	    // Delete the sensitivity
+	    // We'll add it as a generic COMBO SenItem in a moment.
+	    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
+	} else if (nodep->varrefp()) {
+	    // V3LinkResolve should have cleaned most of these up
+	    if (nodep->varrefp()->width()>1) nodep->v3error("Unsupported: Non-single bit wide signal pos/negedge sensitivity: "
+							    <<nodep->varrefp()->prettyName());
+	    m_itemSequent = true;
+	    nodep->varrefp()->varp()->usedClock(true);
+	}
+    }
 
     // Empty visitors, speed things up
     virtual void visit(AstNodeMath* nodep, AstNUser*) {}
@@ -329,8 +364,11 @@ private:
     }
 public:
     // CONSTUCTORS
-    ActiveVisitor(AstNode* nodep) {
+    ActiveVisitor(AstNetlist* nodep) {
 	m_scopeFinalp = NULL;
+	m_alwaysp = NULL;
+	m_itemCombo = false;
+	m_itemSequent = false;
 	nodep->accept(*this);
     }
     virtual ~ActiveVisitor() {}

src/V3Active.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3ActiveTop.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -39,6 +40,7 @@
 #include "V3ActiveTop.h"
 #include "V3Ast.h"
 #include "V3SenTree.h"
+#include "V3Const.h"
 
 //######################################################################
 // Active class functions
@@ -48,10 +50,20 @@ private:
     // NODE STATE
     //  Entire netlist
     //   AstNode::user()		bool. True if processed
+    //  Each call to V3Const::constify
+    //   AstNode::user4()		Used by V3Const::constify, called below
+    AstUser1InUse	m_inuser1;
+
     // STATE
     AstTopScope*	m_topscopep;	// Top scope for adding sentrees under
     SenTreeFinder	m_finder;	// Find global sentree's and add them
-    //int debug() { return 9; }
+
+    // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
 
     // VISITORS
     virtual void visit(AstTopScope* nodep, AstNUser*) {
@@ -68,10 +80,12 @@ private:
     }
     virtual void visit(AstActive* nodep, AstNUser*) {
 	UINFO(4,"   ACTIVE "<<nodep<<endl);
+	V3Const::constifyExpensiveEdit(nodep); // Remove duplicate clocks and such; sensesp() may change!
 	AstSenTree* sensesp = nodep->sensesp();
 	if (!sensesp) nodep->v3fatalSrc("NULL");
-	sensesp->sortSenses();	// Remove duplicate clocks and such
-	if (sensesp->sensesp() && sensesp->sensesp()->isNever()) {
+	if (sensesp->sensesp()
+	    && sensesp->sensesp()->castSenItem()
+	    && sensesp->sensesp()->castSenItem()->isNever()) {
 	    // Never executing.  Kill it.
 	    if (sensesp->sensesp()->nextp()) nodep->v3fatalSrc("Never senitem should be alone, else the never should be eliminated.");
 	    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
@@ -133,7 +147,6 @@ public:
     // CONSTUCTORS
     ActiveTopVisitor(AstNetlist* nodep) {
 	m_topscopep = NULL;
-	AstNode::userClearTree();
 	nodep->accept(*this);
     }
     virtual ~ActiveTopVisitor() {}

src/V3ActiveTop.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Assert.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2005-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2005-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -40,6 +41,7 @@ private:
     // NODE STATE/TYPES
     // Cleared on netlist
     //  AstNode::user()		-> bool.  True if processed
+    AstUser1InUse	m_inuser1;
 
     // STATE
     AstModule*	m_modp;		// Last module
@@ -63,7 +65,9 @@ private:
 	AstNode* timesp = nodep->exprsp(); if (timesp) timesp->unlinkFrBack();
 	timesp = timesp->addNext(new AstTime(nodep->fileline()));
 	nodep->exprsp(timesp);
-	if (!nodep->scopeNamep() && nodep->name().find("%m") != string::npos) {
+	if (!nodep->scopeNamep()
+	    && (nodep->name().find("%m") != string::npos
+		|| nodep->name().find("%M") != string::npos)) {
 	    nodep->scopeNamep(new AstScopeName(nodep->fileline()));
 	}
     }
@@ -115,7 +119,7 @@ private:
 	    } else {
 		// V3Coverage assigned us a bucket to increment.
 		AstCoverInc* covincp = snodep->coverincp()->castCoverInc();
-		if (!covincp) snodep->v3fatalSrc("Missing coverage in PSL");
+		if (!covincp) snodep->v3fatalSrc("Missing AstCoverInc under assertion");
 		covincp->unlinkFrBack();
 		if (message!="") covincp->declp()->comment(message);
 		bodysp = covincp;
@@ -175,8 +179,8 @@ private:
     // VISITORS  //========== Case assertions
     virtual void visit(AstCase* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
-	if (!nodep->user()) {
-	    nodep->user(true);
+	if (!nodep->user1()) {
+	    nodep->user1(true);
 	    bool has_default=false;
 	    for (AstCaseItem* itemp = nodep->itemsp(); itemp; itemp=itemp->nextp()->castCaseItem()) {
 		if (itemp->isDefault()) has_default=true;
@@ -288,7 +292,6 @@ public:
 	m_beginp = NULL;
 	m_modp = NULL;
 	// Process
-	AstNode::userClearTree();	// userp() used on entire tree
 	nodep->accept(*this);
     }
     virtual ~AssertVisitor() {

src/V3Assert.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2005-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2005-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3AssertPre.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2005-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2005-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -44,18 +45,22 @@ private:
     // NODE STATE/TYPES
     // STATE
     // Reset each module:
-    AstSenItem*	m_seniDefaultp;	// Default sensitivity (from AstDefClock)
+    AstNodeSenItem*	m_seniDefaultp;	// Default sensitivity (from AstDefClock)
     // Reset each assertion:
-    AstSenItem*	m_senip;	// Last sensitivity
-
-    int debug() { return 0; }
+    AstNodeSenItem*	m_senip;	// Last sensitivity
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     AstSenTree* newSenTree(AstNode* nodep) {
 	// Create sentree based on clocked or default clock
 	// Return NULL for always
 	AstSenTree* newp = NULL;
-	AstSenItem* senip = m_senip ? m_senip : m_seniDefaultp;
+	AstNodeSenItem* senip = m_senip ? m_senip : m_seniDefaultp;
 	if (!senip) {
 	    nodep->v3error("Unsupported: Unclocked assertion");
 	    newp = new AstSenTree(nodep->fileline(), NULL);

src/V3AssertPre.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2005-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2005-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Ast.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -32,18 +33,22 @@
 //======================================================================
 // Statics
 
-vluint64_t AstNode::s_editCntGbl=0;
 vluint64_t AstNode::s_editCntLast=0;
+vluint64_t AstNode::s_editCntGbl=0;	// Hot cache line
 
 // To allow for fast clearing of all user pointers, we keep a "timestamp"
 // along with each userp, and thus by bumping this count we can make it look
 // as if we iterated across the entire tree to set all the userp's to null.
 int AstNode::s_cloneCntGbl=0;
-int AstNode::s_userCntGbl=0;
-int AstNode::s_user2CntGbl=0;
-int AstNode::s_user3CntGbl=0;
-int AstNode::s_user4CntGbl=0;
-int AstNode::s_user5CntGbl=0;
+uint32_t AstUser1InUse::s_userCntGbl=0;	// Hot cache line, leave adjacent
+uint32_t AstUser2InUse::s_userCntGbl=0;	// Hot cache line, leave adjacent
+uint32_t AstUser3InUse::s_userCntGbl=0;	// Hot cache line, leave adjacent
+uint32_t AstUser4InUse::s_userCntGbl=0;	// Hot cache line, leave adjacent
+
+bool AstUser1InUse::s_userBusy=false;
+bool AstUser2InUse::s_userBusy=false;
+bool AstUser3InUse::s_userBusy=false;
+bool AstUser4InUse::s_userBusy=false;
 
 //######################################################################
 // V3AstType
@@ -70,42 +75,38 @@ void AstNode::init() {
     m_signed = false;
     m_width = 0;
     m_widthMin = 0;
-    m_userp = NULL;
-    m_userCnt = 0;
+    m_user1p = NULL;
+    m_user1Cnt = 0;
     m_user2p = NULL;
     m_user2Cnt = 0;
     m_user3p = NULL;
     m_user3Cnt = 0;
     m_user4p = NULL;
     m_user4Cnt = 0;
-    m_user5p = NULL;
-    m_user5Cnt = 0;
 }
 
 string AstNode::encodeName(const string& namein) {
-    string name2 = namein;
+    // Encode signal name raw from parser, then not called again on same signal
+    const char* start = namein.c_str();
     string out;
-    const char* start = name2.c_str();
     for (const char* pos = start; *pos; pos++) {
 	if ((pos==start) ? isalpha(pos[0])  // digits can't lead identifiers
 	    : isalnum(pos[0])) {
 	    out += pos[0];
 	} else if (pos[0]=='_') {
 	    if (pos[1]=='_') {
-		out += "_"; out += "__5F";  // hex(_) = 0x5F
+		out += "_"; out += "__05F";  // hex(_) = 0x5F
 		pos++;
 	    } else {
 		out += pos[0];
 	    }
-	} else if (pos[0]=='.') {
-	    out += "__DOT__";
-	} else if (pos[0]=='[') {
-	    out += "__BRA__";
-	} else if (pos[0]==']') {
-	    out += "__KET__";
 	} else {
-	    char hex[10]; sprintf(hex,"%02X",pos[0]);
-	    out += "__"; out += hex;
+	    // Need the leading 0 so this will never collide with
+	    // a user identifier nor a temp we create in Verilator.
+	    // We also do *NOT* use __DOT__ etc, as we search for those
+	    // in some replacements, and don't want to mangle the user's names.
+	    char hex[10]; sprintf(hex,"__0%02X",pos[0]);
+	    out += hex;
 	}
     }
     return out;
@@ -113,7 +114,7 @@ string AstNode::encodeName(const string& namein) {
 
 string AstNode::encodeNumber(vlsint64_t num) {
     if (num < 0) {
-	return "__2D"+cvtToStr(-num);  // 2D=-
+	return "__02D"+cvtToStr(-num);  // 2D=-
     } else {
 	return cvtToStr(num);
     }
@@ -138,11 +139,25 @@ string AstNode::dedotName(const string& namein) {
     return pretty;
 }
 
+string AstNode::vcdName(const string& namein) {
+    // VCD tracing expects space to separate hiearchy
+    // Dots are reserved for dots the user put in the name
+    string pretty = namein;
+    string::size_type pos;
+    while ((pos=pretty.find("__DOT__")) != string::npos) {
+	pretty.replace(pos, 7, " ");
+    }
+    while ((pos=pretty.find(".")) != string::npos) {
+	pretty.replace(pos, 1, " ");
+    }
+    // Now convert escaped special characters, etc
+    return prettyName(pretty);
+}
+
 string AstNode::prettyName(const string& namein) {
     string pretty;
-    string name2 = namein;
     pretty = "";
-    for (const char* pos = name2.c_str(); *pos; ) {
+    for (const char* pos = namein.c_str(); *pos; ) {
 	if (0==strncmp(pos,"__BRA__",7)) {
 	    pretty += "[";
 	    pos += 7;
@@ -159,19 +174,51 @@ string AstNode::prettyName(const string& namein) {
 	    pretty += "";
 	    pos += 7;
 	}
-	else if (pos[0]=='_' && pos[1]=='_' && isxdigit(pos[2]) && isxdigit(pos[3])) {
+	else if (pos[0]=='_' && pos[1]=='_' && pos[2]=='0'
+		 && isxdigit(pos[3]) && isxdigit(pos[4])) {
 	    char value = 0;
-	    value += 16*(isdigit(pos[2]) ? (pos[2]-'0') : (tolower(pos[2])-'a'+10));
-	    value +=    (isdigit(pos[3]) ? (pos[3]-'0') : (tolower(pos[3])-'a'+10));
+	    value += 16*(isdigit(pos[3]) ? (pos[3]-'0') : (tolower(pos[3])-'a'+10));
+	    value +=    (isdigit(pos[4]) ? (pos[4]-'0') : (tolower(pos[4])-'a'+10));
 	    pretty += value;
-	    pos += 4;
+	    pos += 5;
 	}
 	else {
 	    pretty += pos[0];
 	    pos++;
 	}
     }
-    return AstNode::dedotName(pretty);
+    if (pretty.substr(0,4) == "TOP.") pretty.replace(0,4,"");
+    return pretty;
+}
+
+string AstNode::prettyTypeName() const {
+    if (name()=="") return typeName();
+    return string(typeName())+" '"+prettyName()+"'";
+}
+
+string AstNode::quoteName(const string& namein) {
+    // Encode control chars into C style escapes
+    // Reverse is V3Parse::deQuote
+    const char* start = namein.c_str();
+    string out;
+    for (const char* pos = start; *pos; pos++) {
+	if (pos[0]=='\\' || pos[0]=='"') {
+	    out += string("\\")+pos[0];
+	} else if (pos[0]=='\n') {
+	    out += "\\n";
+	} else if (pos[0]=='\r') {
+	    out += "\\r";
+	} else if (pos[0]=='\t') {
+	    out += "\\t";
+	} else if (isprint(pos[0])) {
+	    out += pos[0];
+	} else {
+	    // This will also cover \a etc
+	    char octal[10]; sprintf(octal,"\\%03o",pos[0]);
+	    out += octal;
+	}
+    }
+    return out;
 }
 
 int AstNode::widthPow2() const {
@@ -552,6 +599,23 @@ void AstNode::relinkOneLink(AstNode*& pointpr,  // Ref to pointer that gets set
     pointpr = newp;
 }
 
+void AstNode::addHereThisAsNext (AstNode* newp) {
+    // {old}->this->{next} becomes {old}->new->this->{next}
+    AstNRelinker handle;
+    this->unlinkFrBackWithNext(&handle);
+    newp->addNext(this);
+    handle.relink(newp);
+}
+
+void AstNode::swapWith (AstNode* bp) {
+    AstNRelinker aHandle;
+    AstNRelinker bHandle;
+    this->unlinkFrBack(&aHandle);
+    bp->unlinkFrBack(&bHandle);
+    aHandle.relink(bp);
+    bHandle.relink(this);
+}
+
 //======================================================================
 // Clone
 
@@ -671,11 +735,42 @@ void AstNode::operator delete(void* objp, size_t size) {
 // Iterators
 
 void AstNode::iterateChildren(AstNVisitor& v, AstNUser* vup) {
+    // This is a very hot function
     if (!this) return;
-    m_op1p->iterateAndNext(v, vup);
-    m_op2p->iterateAndNext(v, vup);
-    m_op3p->iterateAndNext(v, vup);
-    m_op4p->iterateAndNext(v, vup);
+    ASTNODE_PREFETCH(m_op1p);
+    ASTNODE_PREFETCH(m_op2p);
+    ASTNODE_PREFETCH(m_op3p);
+    ASTNODE_PREFETCH(m_op4p);
+    // if () not needed since iterateAndNext accepts null this, but faster with it.
+    if (m_op1p) m_op1p->iterateAndNext(v, vup);
+    if (m_op2p) m_op2p->iterateAndNext(v, vup);
+    if (m_op3p) m_op3p->iterateAndNext(v, vup);
+    if (m_op4p) m_op4p->iterateAndNext(v, vup);
+}
+
+void AstNode::iterateAndNext(AstNVisitor& v, AstNUser* vup) {
+    // This is a very hot function
+    // IMPORTANT: If you replace a node that's the target of this iterator,
+    // then the NEW node will be iterated on next, it isn't skipped!
+    // if (!this) return;  // Part of for()
+    // Future versions of this function may require the node to have a back to be iterated;
+    // there's no lower level reason yet though the back must exist.
+    AstNode* nodep=this;
+    if (VL_UNLIKELY(nodep && !nodep->m_backp)) nodep->v3fatalSrc("iterateAndNext node has no back");
+    while (nodep) {
+	AstNode* niterp = nodep;
+	ASTNODE_PREFETCH(nodep->m_nextp);
+	niterp->m_iterpp = &niterp;
+	niterp->accept(v, vup);
+	// accept may do a replaceNode and change niterp on us...
+	if (!niterp) return;
+	niterp->m_iterpp = NULL;
+	if (VL_UNLIKELY(niterp!=nodep)) { // Edited it
+	    nodep = niterp;
+	} else {  // Same node, just loop
+	    nodep = niterp->m_nextp;
+	}
+    }
 }
 
 void AstNode::iterateListBackwards(AstNVisitor& v, AstNUser* vup) {
@@ -698,25 +793,6 @@ void AstNode::iterateChildrenBackwards(AstNVisitor& v, AstNUser* vup) {
     this->op4p()->iterateListBackwards(v,vup);
 }
 
-void AstNode::iterateAndNext(AstNVisitor& v, AstNUser* vup) {
-    // IMPORTANT: If you replace a node that's the target of this iterator,
-    // then the NEW node will be iterated on next, it isn't skipped!
-    // if (!this) return;  // Part of for()
-    for (AstNode* nodep=this; nodep;) {
-	AstNode* niterp = nodep;
-	niterp->m_iterpp = &niterp;
-	niterp->accept(v, vup);
-	// accept may do a replaceNode and change niterp on us...
-	if (!niterp) return;
-	niterp->m_iterpp = NULL;
-	if (niterp!=nodep) { // Edited it
-	    nodep = niterp;
-	} else {  // Same node, just loop
-	    nodep = niterp->m_nextp;
-	}
-    }
-}
-
 void AstNode::iterateAndNextIgnoreEdit(AstNVisitor& v, AstNUser* vup) {
     // Keep following the current list even if edits change it
     if (!this) return;
@@ -727,6 +803,42 @@ void AstNode::iterateAndNextIgnoreEdit(AstNVisitor& v, AstNUser* vup) {
     }
 }
 
+AstNode* AstNode::acceptSubtreeReturnEdits(AstNVisitor& v, AstNUser* vup) {
+    // Some visitors perform tree edits (such as V3Const), and may even
+    // replace/delete the exact nodep that the visitor is called with.  If
+    // this happens, the parent will loose the handle to the node that was
+    // processed.
+    // To solve this, this function returns the pointer to the replacement node,
+    // which in many cases is just the same node that was passed in.
+    AstNode* nodep = this;  // Note "this" may point to bogus point later in this function
+    if (nodep->castNetlist()) {
+	// Calling on top level; we know the netlist won't get replaced
+	nodep->accept(v, vup);
+    } else if (!nodep->backp()) {
+	// Calling on standalone tree; insert a shim node so we can keep track, then delete it on completion
+	AstBegin* tempp = new AstBegin(nodep->fileline(),"[EditWrapper]",nodep);
+	{
+	    tempp->stmtsp()->accept(v, vup);  nodep=NULL; // nodep to null as may be replaced
+	}
+	nodep = tempp->stmtsp()->unlinkFrBackWithNext();
+	tempp->deleteTree(); tempp=NULL;
+    } else {
+	// Use back to determine who's pointing at us (IE assume new node grafts into same place as old one)
+	AstNode** nextnodepp = NULL;
+	if (this->m_backp->m_op1p == this) nextnodepp = &(this->m_backp->m_op1p);
+	else if (this->m_backp->m_op2p == this) nextnodepp = &(this->m_backp->m_op2p);
+	else if (this->m_backp->m_op3p == this) nextnodepp = &(this->m_backp->m_op3p);
+	else if (this->m_backp->m_op4p == this) nextnodepp = &(this->m_backp->m_op4p);
+	else if (this->m_backp->m_nextp == this) nextnodepp = &(this->m_backp->m_nextp);
+	if (!nextnodepp) this->v3fatalSrc("Node's back doesn't point to forward to node itself");
+	{
+	    nodep->accept(v, vup); nodep=NULL; // nodep to null as may be replaced
+	}
+	nodep = *nextnodepp;  // Grab new node from point where old was connected
+    }
+    return nodep;
+}
+
 //======================================================================
 
 void AstNode::cloneRelinkTree() {
@@ -787,6 +899,11 @@ void AstNode::checkTreeIter(AstNode* backp) {
     if (backp != this->backp()) {
 	this->v3fatalSrc("Back node inconsistent");
     }
+    if (castNodeTermop() || castNodeVarRef()) {
+	// Termops have a short-circuited iterateChildren, so check usage
+	if (op1p()||op2p()||op3p()||op4p())
+	    this->v3fatalSrc("Terminal operation with non-terminals");
+    }
     if (op1p()) op1p()->checkTreeIterList(this);
     if (op2p()) op2p()->checkTreeIterList(this);
     if (op3p()) op3p()->checkTreeIterList(this);
@@ -829,7 +946,10 @@ void AstNode::dumpPtrs(ostream& os) {
     if (op2p()) os<<" op2p="<<(void*)op2p();
     if (op3p()) os<<" op3p="<<(void*)op3p();
     if (op4p()) os<<" op4p="<<(void*)op4p();
-    if (userp()) os<<" user="<<(void*)userp();
+    if (user1p()) os<<" user1p="<<(void*)user1p();
+    if (user2p()) os<<" user2p="<<(void*)user2p();
+    if (user3p()) os<<" user3p="<<(void*)user3p();
+    if (user4p()) os<<" user4p="<<(void*)user4p();
     if (m_iterpp) {
 	os<<" iterpp="<<(void*)m_iterpp;
 	os<<"*="<<(void*)*m_iterpp;
@@ -865,7 +985,7 @@ void AstNode::dumpTreeFile(const string& filename, bool append) {
 	    if (logsp->fail()) v3fatalSrc("Can't write "<<filename);
 	    *logsp<<"Tree Dump from <e"<<dec<<editCountLast()<<">";
 	    *logsp<<" to <e"<<dec<<editCountGbl()<<">"<<endl;
-	    if (editCountGbl()==editCountLast() && 1) {  // Off, as messes up tree diffing
+	    if (editCountGbl()==editCountLast()) {
 		*logsp<<endl;
 		*logsp<<"No changes since last dump!\n";
 	    } else {
@@ -884,7 +1004,7 @@ void AstNode::dumpTreeFile(const string& filename, bool append) {
     editCountSetLast();
 }
 
-void AstNode::v3errorEnd(ostringstream& str) {
+void AstNode::v3errorEnd(ostringstream& str) const {
     if (this && m_fileline) {
 	ostringstream nsstr;
 	nsstr<<str.str();
@@ -899,6 +1019,7 @@ void AstNode::v3errorEnd(ostringstream& str) {
 }
 
 //######################################################################
+// AstNVisitor
 
 void AstNVisitor::doDeletes() {
     for (vector<AstNode*>::iterator it = m_deleteps.begin(); it != m_deleteps.end(); ++it) {

src/V3Ast.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -40,10 +41,10 @@ public:
     //   enum en {...};
     //   const char* ascii() const {...};
     enum en m_e;
-    inline AstType () {};
-    inline AstType (en _e) : m_e(_e) {};
-    explicit inline AstType (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstType () {}
+    inline AstType (en _e) : m_e(_e) {}
+    explicit inline AstType (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
   };
   inline bool operator== (AstType lhs, AstType rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstType lhs, AstType::en rhs) { return (lhs.m_e == rhs); }
@@ -63,10 +64,10 @@ public:
 	PUBLIC_TASK
     };
     enum en m_e;
-    inline AstPragmaType () {};
-    inline AstPragmaType (en _e) : m_e(_e) {};
-    explicit inline AstPragmaType (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstPragmaType () {}
+    inline AstPragmaType (en _e) : m_e(_e) {}
+    explicit inline AstPragmaType (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
   };
   inline bool operator== (AstPragmaType lhs, AstPragmaType rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstPragmaType lhs, AstPragmaType::en rhs) { return (lhs.m_e == rhs); }
@@ -79,14 +80,21 @@ public:
     enum en {
 	NORMAL,
 	TRACE_INIT,
+	TRACE_INIT_SUB,
 	TRACE_FULL,
-	TRACE_CHANGE
+	TRACE_FULL_SUB,
+	TRACE_CHANGE,
+	TRACE_CHANGE_SUB
     };
     enum en m_e;
-    inline AstCFuncType () {};
-    inline AstCFuncType (en _e) : m_e(_e) {};
-    explicit inline AstCFuncType (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstCFuncType () {}
+    inline AstCFuncType (en _e) : m_e(_e) {}
+    explicit inline AstCFuncType (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
+    // METHODS
+    bool isTrace() const { return (m_e==TRACE_INIT || m_e==TRACE_INIT_SUB
+				   || m_e==TRACE_FULL || m_e==TRACE_FULL_SUB
+				   || m_e==TRACE_CHANGE || m_e==TRACE_CHANGE_SUB); }
   };
   inline bool operator== (AstCFuncType lhs, AstCFuncType rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstCFuncType lhs, AstCFuncType::en rhs) { return (lhs.m_e == rhs); }
@@ -98,7 +106,7 @@ class AstEdgeType {
 public:
 // REMEMBER to edit the strings below too
     enum en {
-	// These must be in general -> most specific order, as we sort by it in AstSenTree::sortSenses()
+	// These must be in general -> most specific order, as we sort by it in V3Const::visit AstSenTre
 	ILLEGAL,
 	// Involving a variable
 	ANYEDGE,	// Default for sensitivities; rip them out
@@ -142,15 +150,15 @@ public:
     };
     const char* verilogKwd() const {
 	static const char* names[] = {
-	    "%E-edge", "", "[both]", "posedge", "negedge", "[high]","[low]",
-	    "/*AS*/","[initial]","[settle]","[never]"
+	    "%E-edge", "[any]", "[both]", "posedge", "negedge", "[high]","[low]",
+	    "*","[initial]","[settle]","[never]"
 	};
 	return names[m_e];
     };
-    inline AstEdgeType () {};
-    inline AstEdgeType (en _e) : m_e(_e) {};
-    explicit inline AstEdgeType (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstEdgeType () {}
+    inline AstEdgeType (en _e) : m_e(_e) {}
+    explicit inline AstEdgeType (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
   };
   inline bool operator== (AstEdgeType lhs, AstEdgeType rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstEdgeType lhs, AstEdgeType::en rhs) { return (lhs.m_e == rhs); }
@@ -161,16 +169,28 @@ public:
 class AstAttrType {
 public:
     enum en {
-	BITS,
-	RANGE_LSB,
-	ARRAY_LSB,
-	SCOPE_TEXT
+	BITS,				// V3Const converts to constant
+	//
+	VAR_BASE,			// V3LinkResolve creates for AstPreSel, V3LinkParam removes
+	VAR_CLOCK,			// V3LinkParse moves to AstVar::attrScClocked
+	VAR_CLOCK_ENABLE,		// V3LinkParse moves to AstVar::attrClockEn
+	VAR_PUBLIC,			// V3LinkParse moves to AstVar::sigPublic
+	VAR_PUBLIC_FLAT,		// V3LinkParse moves to AstVar::sigPublic
+	VAR_ISOLATE_ASSIGNMENTS		// V3LinkParse moves to AstVar::attrIsolateAssign
     };
     enum en m_e;
-    inline AstAttrType () {};
-    inline AstAttrType (en _e) : m_e(_e) {};
-    explicit inline AstAttrType (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    const char* ascii() const {
+	static const char* names[] = {
+	    "BITS", "VAR_BASE",
+	    "VAR_CLOCK", "VAR_CLOCK_ENABLE", "VAR_PUBLIC", "VAR_PUBLIC_FLAT",
+	    "VAR_ISOLATE_ASSIGNMENTS"
+	};
+	return names[m_e];
+    };
+    inline AstAttrType () {}
+    inline AstAttrType (en _e) : m_e(_e) {}
+    explicit inline AstAttrType (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
   };
   inline bool operator== (AstAttrType lhs, AstAttrType rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstAttrType lhs, AstAttrType::en rhs) { return (lhs.m_e == rhs); }
@@ -195,23 +215,24 @@ public:
 	IMPLICIT,
 	REG,
 	TRIWIRE,
+	PORT,		// Temp type used in parser only
 	BLOCKTEMP,
 	MODULETEMP,
 	STMTTEMP,
 	XTEMP
     };
     enum en m_e;
-    inline AstVarType () {};
-    inline AstVarType (en _e) : m_e(_e) {};
-    explicit inline AstVarType (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstVarType () {}
+    inline AstVarType (en _e) : m_e(_e) {}
+    explicit inline AstVarType (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
     const char* ascii() const {
 	static const char* names[] = {
 	    "?","GPARAM","LPARAM","GENVAR",
 	    "INTEGER","INPUT","OUTPUT","INOUT",
-	    "SUPPLY0","SUPPLY1","WIRE","IMPLICIT","REG","TRIWIRE",
+	    "SUPPLY0","SUPPLY1","WIRE","IMPLICIT","REG","TRIWIRE","PORT",
 	    "BLOCKTEMP","MODULETEMP","STMTTEMP","XTEMP"};
-	return names[m_e];};
+	return names[m_e]; }
   };
   inline bool operator== (AstVarType lhs, AstVarType rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstVarType lhs, AstVarType::en rhs) { return (lhs.m_e == rhs); }
@@ -230,10 +251,10 @@ public:
     };
     enum en m_e;
     // CONSTRUCTOR - note defaults to *UNKNOWN*
-    inline AstBranchPred () : m_e(UNKNOWN) {};
-    inline AstBranchPred (en _e) : m_e(_e) {};
-    explicit inline AstBranchPred (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstBranchPred () : m_e(UNKNOWN) {}
+    inline AstBranchPred (en _e) : m_e(_e) {}
+    explicit inline AstBranchPred (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
     AstBranchPred invert() const {
 	if (m_e==UNLIKELY) return LIKELY;
 	else if (m_e==LIKELY) return UNLIKELY;
@@ -242,7 +263,7 @@ public:
     const char* ascii() const {
 	static const char* names[] = {
 	    "","VL_LIKELY","VL_UNLIKELY"};
-	return names[m_e];};
+	return names[m_e]; }
   };
   inline bool operator== (AstBranchPred lhs, AstBranchPred rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstBranchPred lhs, AstBranchPred::en rhs) { return (lhs.m_e == rhs); }
@@ -259,10 +280,10 @@ public:
 	CASEZ
     };
     enum en m_e;
-    inline AstCaseType () {};
-    inline AstCaseType (en _e) : m_e(_e) {};
-    explicit inline AstCaseType (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstCaseType () {}
+    inline AstCaseType (en _e) : m_e(_e) {}
+    explicit inline AstCaseType (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
   };
   inline bool operator== (AstCaseType lhs, AstCaseType rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstCaseType lhs, AstCaseType::en rhs) { return (lhs.m_e == rhs); }
@@ -281,16 +302,16 @@ public:
 	FATAL
     };
     enum en m_e;
-    inline AstDisplayType () {};
-    inline AstDisplayType (en _e) : m_e(_e) {};
-    explicit inline AstDisplayType (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstDisplayType () {}
+    inline AstDisplayType (en _e) : m_e(_e) {}
+    explicit inline AstDisplayType (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
     bool addNewline() const { return m_e!=WRITE; }
     bool needScopeTracking() const { return m_e!=DISPLAY && m_e!=WRITE; }
     const char* ascii() const {
 	static const char* names[] = {
 	    "display","write","info","error","warning","fatal"};
-	return names[m_e];};
+	return names[m_e]; }
   };
   inline bool operator== (AstDisplayType lhs, AstDisplayType rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstDisplayType lhs, AstDisplayType::en rhs) { return (lhs.m_e == rhs); }
@@ -309,14 +330,14 @@ public:
 	_ENUM_END
     };
     enum en m_e;
-    inline AstParseRefExp() : m_e(NONE) {};
-    inline AstParseRefExp (en _e) : m_e(_e) {};
-    explicit inline AstParseRefExp (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    inline AstParseRefExp() : m_e(NONE) {}
+    inline AstParseRefExp (en _e) : m_e(_e) {}
+    explicit inline AstParseRefExp (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
     const char* ascii() const {
 	static const char* names[] = {
 	    "","VAR_MEM","VAR_ANY","TASK","FUNC"};
-	return names[m_e];};
+	return names[m_e]; }
   };
   inline bool operator== (AstParseRefExp lhs, AstParseRefExp rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (AstParseRefExp lhs, AstParseRefExp::en rhs) { return (lhs.m_e == rhs); }
@@ -355,6 +376,83 @@ struct AstNUser {
     }
 };
 
+//######################################################################
+// AstUserResource - Generic pointer base class for tracking usage of user()
+//
+//  Where AstNode->user2() is going to be used, for example, you write:
+//
+//	AstUser2InUse  m_userres;
+//
+//  This will clear the tree, and prevent another visitor from clobering
+//  user2.  When the member goes out of scope it will be automagically
+//  freed up.
+
+class AstUserInUseBase {
+protected:
+    static void	allocate(int id, uint32_t& cntGblRef, bool& userBusyRef) {
+	// Perhaps there's still a AstUserInUse in scope for this?
+	UASSERT_STATIC(!userBusyRef, "Conflicting user use; AstUser"+cvtToStr(id)+"InUse request when under another AstUserInUse");
+	userBusyRef = true;
+	clearcnt(id, cntGblRef, userBusyRef);
+    }
+    static void	free(int id, uint32_t& cntGblRef, bool& userBusyRef) {
+	UASSERT_STATIC(userBusyRef, "Free of User"+cvtToStr(id)+"() not under AstUserInUse");
+	clearcnt(id, cntGblRef, userBusyRef);  // Includes a checkUse for us
+	userBusyRef = false;
+    }
+    static void clearcnt(int id, uint32_t& cntGblRef, bool& userBusyRef) {
+	UASSERT_STATIC(userBusyRef, "Clear of User"+cvtToStr(id)+"() not under AstUserInUse");
+	// If this really fires and is real (after 2^32 edits???)
+	// we could just walk the tree and clear manually
+	++cntGblRef;
+	UASSERT_STATIC(cntGblRef, "User*() overflowed!");
+    }
+};
+
+// For each user() declare the in use structure
+// We let AstNode peek into here, because when under low optimization even
+// an accessor would be way too slow.
+class AstUser1InUse : AstUserInUseBase {
+protected:
+    friend class AstNode;
+    static uint32_t	s_userCntGbl;	// Count of which usage of userp() this is
+    static bool		s_userBusy;	// Count is in use
+public:
+    AstUser1InUse()     { allocate(1, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+    ~AstUser1InUse()    { free    (1, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+    static void clear() { clearcnt(1, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+};
+class AstUser2InUse : AstUserInUseBase {
+protected:
+    friend class AstNode;
+    static uint32_t	s_userCntGbl;	// Count of which usage of userp() this is
+    static bool		s_userBusy;	// Count is in use
+public:
+    AstUser2InUse()      { allocate(2, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+    ~AstUser2InUse()     { free    (2, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+    static void clear()  { clearcnt(2, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+};
+class AstUser3InUse : AstUserInUseBase {
+protected:
+    friend class AstNode;
+    static uint32_t	s_userCntGbl;	// Count of which usage of userp() this is
+    static bool		s_userBusy;	// Count is in use
+public:
+    AstUser3InUse()      { allocate(3, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+    ~AstUser3InUse()     { free    (3, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+    static void clear()  { clearcnt(3, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+};
+class AstUser4InUse : AstUserInUseBase {
+protected:
+    friend class AstNode;
+    static uint32_t	s_userCntGbl;	// Count of which usage of userp() this is
+    static bool		s_userBusy;	// Count is in use
+public:
+    AstUser4InUse()      { allocate(4, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+    ~AstUser4InUse()     { free    (4, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+    static void clear()  { clearcnt(4, s_userCntGbl/*ref*/, s_userBusy/*ref*/); }
+};
+
 //######################################################################
 // AstNVisitor -- Allows new functions to be called on each node
 // type without changing the base classes.  See "Modern C++ Design".
@@ -421,8 +519,9 @@ public:
     uint32_t depth() const { return (m_both >> 24) & 255; }
     uint32_t hshval() const { return m_both & M24; }
     // OPERATORS
-    inline bool operator== (const V3Hash& rh) const { return m_both==rh.m_both; };
-    inline bool operator< (const V3Hash& rh) const { return m_both<rh.m_both; };
+    inline bool operator== (const V3Hash& rh) const { return m_both==rh.m_both; }
+    inline bool operator!= (const V3Hash& rh) const { return m_both!=rh.m_both; }
+    inline bool operator< (const V3Hash& rh) const { return m_both<rh.m_both; }
     // CREATORS
     class Illegal {};		// for creator type-overload selection
     class FullValue {};		// for creator type-overload selection
@@ -435,13 +534,7 @@ public:
     // Creating from raw data (sameHash functions)
     V3Hash() { setBoth(1,0); }
     V3Hash(uint32_t val) { setBoth(1,val); }
-    V3Hash(void* vp) {
-	// It's just a hash, so we can shove a 64 bit pointer into a 32 bit bucket
-	// On 32 bit systems, lower is always 0, but who cares?
-	union { void* up; struct {uint32_t upper; uint32_t lower;} l;} u;
-	u.l.upper=0; u.l.lower=0; u.up=vp;
-	setBoth(1,u.l.upper^u.l.lower);
-    }
+    V3Hash(void* vp) { setBoth(1,cvtToHash(vp)); }
     V3Hash(const string& name);
     V3Hash(V3Hash lh, V3Hash rh) {
 	setBoth(1,lh.hshval()*31+rh.hshval());
@@ -452,45 +545,48 @@ ostream& operator<<(ostream& os, V3Hash rhs);
 //######################################################################
 // AstNode -- Base type of all Ast types
 
+// Prefetch a node.
+// The if() makes it faster, even though prefetch won't fault on null pointers
+#define ASTNODE_PREFETCH(nodep) \
+    { if (nodep) { VL_PREFETCH_RD(&(nodep->m_nextp)); VL_PREFETCH_RD(&(nodep->m_iterpp)); }}
+
 class AstNode {
-private:
+    // v ASTNODE_PREFETCH depends on below ordering of members
     AstNode*	m_nextp;	// Next peer in the parent's list
     AstNode*	m_backp;	// Node that points to this one (via next/op1/op2/...)
-    AstNode*	m_headtailp;	// When at begin/end of list, the opposite end of the list
     AstNode*	m_op1p;		// Generic pointer 1
     AstNode*	m_op2p;		// Generic pointer 2
     AstNode*	m_op3p;		// Generic pointer 3
     AstNode*	m_op4p;		// Generic pointer 4
     AstNode**	m_iterpp;	// Pointer to node iterating on, change it if we replace this node.
+    // ^ ASTNODE_PREFETCH depends on above ordering of members
 
-    AstNode*	m_clonep;	// Pointer to clone of/ source of this module (for *LAST* cloneTree() ONLY)
-    int		m_cloneCnt;	// Mark of when userp was set
-    static int	s_cloneCntGbl;	// Count of which userp is set
+    AstNode*	m_headtailp;	// When at begin/end of list, the opposite end of the list
 
     FileLine*	m_fileline;	// Where it was declared
     vluint64_t	m_editCount;	// When it was last edited
     static vluint64_t s_editCntGbl; // Global edit counter
     static vluint64_t s_editCntLast;// Global edit counter, last value for printing * near node #s
 
+    AstNode*	m_clonep;	// Pointer to clone of/ source of this module (for *LAST* cloneTree() ONLY)
+    int		m_cloneCnt;	// Mark of when userp was set
+    static int	s_cloneCntGbl;	// Count of which userp is set
+
     // Attributes
-    bool	m_signed;	// Node is signed
+    bool	m_signed:1;	// Node is signed
+    //		// Space for more bools here
+
     int		m_width;	// Bit width of operation
     int		m_widthMin;	// If unsized, bitwidth of minimum implementation
-    AstNUser*	m_userp;	// Pointer to any information the user iteration routine wants
-    int		m_userCnt;	// Mark of when userp was set
-    static int	s_userCntGbl;	// Count of which userp is set
+    // This member ordering both allows 64 bit alignment and puts associated data together
+    AstNUser*	m_user1p;	// Pointer to any information the user iteration routine wants
+    uint32_t	m_user1Cnt;	// Mark of when userp was set
+    uint32_t	m_user2Cnt;	// Mark of when userp was set
     AstNUser*	m_user2p;	// Pointer to any information the user iteration routine wants
-    int		m_user2Cnt;	// Mark of when userp was set
-    static int	s_user2CntGbl;	// Count of which userp is set
     AstNUser*	m_user3p;	// Pointer to any information the user iteration routine wants
-    int		m_user3Cnt;	// Mark of when userp was set
-    static int	s_user3CntGbl;	// Count of which userp is set
+    uint32_t	m_user3Cnt;	// Mark of when userp was set
+    uint32_t	m_user4Cnt;	// Mark of when userp was set
     AstNUser*	m_user4p;	// Pointer to any information the user iteration routine wants
-    int		m_user4Cnt;	// Mark of when userp was set
-    static int	s_user4CntGbl;	// Count of which userp is set
-    AstNUser*	m_user5p;	// Pointer to any information the user iteration routine wants
-    int		m_user5Cnt;	// Mark of when userp was set
-    static int	s_user5CntGbl;	// Count of which userp is set
 
     // METHODS
     void	op1p(AstNode* nodep) { m_op1p = nodep; if (nodep) nodep->m_backp = this; }
@@ -514,7 +610,7 @@ protected:
     // CONSTUCTORS
     AstNode() {init(); }
     AstNode(FileLine* fileline) {init(); m_fileline = fileline; }
-    virtual AstNode* clone() = 0;	// Generally, cloneTree/cloneNode is what you want
+    virtual AstNode* clone() = 0;	// Generally, cloneTree is what you want instead
     virtual void cloneRelink() {}
     void 	cloneRelinkTree();
 
@@ -545,7 +641,7 @@ protected:
 public:
     // ACCESSORS
     virtual AstType	type() const = 0;
-    const char*	typeName() const { return type().ascii(); }
+    const char*	typeName() const { return type().ascii(); }  // See also prettyTypeName
     AstNode*	nextp() const { return m_nextp; }
     AstNode*	backp() const { return m_backp; }
     AstNode*	op1p() const { return m_op1p; }
@@ -574,13 +670,17 @@ public:
 
     // ACCESSORS
     virtual string name() const { return ""; }
+    virtual void name(const string& name) { this->v3fatalSrc("name() called on object without name() method"); }
     virtual string verilogKwd() const { return ""; }
     string 	shortName() const;	// Name with __PVT__ removed for concatenating scopes
     static string dedotName(const string& namein);	// Name with dots removed
+    static string quoteName(const string& namein);	// Name with control chars quoted
     static string prettyName(const string& namein);	// Name for printing out to the user
     static string encodeName(const string& namein);	// Encode user name into internal C representation
     static string encodeNumber(vlsint64_t numin);	// Encode number into internal C representation
+    static string vcdName(const string& namein); // Name for printing out to vcd files
     string	prettyName() const { return prettyName(name()); }
+    string	prettyTypeName() const;			// "VARREF name" for error messages
     FileLine*	fileline() const { return m_fileline; }
     int		width() const { return m_width; }
     bool	width1() const { return width()==1; }
@@ -598,34 +698,42 @@ public:
     bool	isQuad() const { return (width()>VL_WORDSIZE && width()<=VL_QUADSIZE); }
     bool	isWide() const { return (width()>VL_QUADSIZE); }
 
-    int		user() const { return userp()->castInt(); }
-    AstNUser*	userp() const { return ((m_userCnt==s_userCntGbl)?m_userp:NULL); }
-    void	userp(void* userp) { m_userp=(AstNUser*)(userp); m_userCnt=s_userCntGbl; }
-    void	user(int val) { userp(AstNUser::fromInt(val)); }
-    static void	userClearTree() { s_userCntGbl++; UASSERT_STATIC(s_userCntGbl,"Rollover"); }  // Clear userp()'s across the entire tree
+    AstNUser*	user1p() const {
+	// Slows things down measurably, so disabled by default
+	//UASSERT_STATIC(AstUser1InUse::s_userBusy, "userp set w/o busy");
+	return ((m_user1Cnt==AstUser1InUse::s_userCntGbl)?m_user1p:NULL);
+    }
+    void	user1p(void* userp) { m_user1p=(AstNUser*)(userp); m_user1Cnt=AstUser1InUse::s_userCntGbl; }
+    int		user1() const { return user1p()->castInt(); }
+    void	user1(int val) { user1p(AstNUser::fromInt(val)); }
+    static void	user1ClearTree() { AstUser1InUse::clear(); }  // Clear userp()'s across the entire tree
+
+    AstNUser*	user2p() const {
+	//UASSERT_STATIC(AstUser2InUse::s_userBusy, "user2p set w/o busy");
+	return ((m_user2Cnt==AstUser2InUse::s_userCntGbl)?m_user2p:NULL); }
+    void	user2p(void* userp) { m_user2p=(AstNUser*)(userp); m_user2Cnt=AstUser2InUse::s_userCntGbl; }
     int		user2() const { return user2p()->castInt(); }
-    AstNUser*	user2p() const { return ((m_user2Cnt==s_user2CntGbl)?m_user2p:NULL); }
-    void	user2p(void* userp) { m_user2p=(AstNUser*)(userp); m_user2Cnt=s_user2CntGbl; }
     void	user2(int val) { user2p(AstNUser::fromInt(val)); }
-    static void	user2ClearTree() { s_user2CntGbl++; }  // Clear userp()'s across the entire tree
+    static void	user2ClearTree() { AstUser2InUse::clear(); }
+
+    AstNUser*	user3p() const {
+	//UASSERT_STATIC(AstUser3InUse::s_userBusy, "user3p set w/o busy");
+	return ((m_user3Cnt==AstUser3InUse::s_userCntGbl)?m_user3p:NULL); }
+    void	user3p(void* userp) { m_user3p=(AstNUser*)(userp); m_user3Cnt=AstUser3InUse::s_userCntGbl; }
     int		user3() const { return user3p()->castInt(); }
-    AstNUser*	user3p() const { return ((m_user3Cnt==s_user3CntGbl)?m_user3p:NULL); }
-    void	user3p(void* userp) { m_user3p=(AstNUser*)(userp); m_user3Cnt=s_user3CntGbl; }
     void	user3(int val) { user3p(AstNUser::fromInt(val)); }
-    static void	user3ClearTree() { s_user3CntGbl++; }  // Clear userp()'s across the entire tree
+    static void	user3ClearTree() { AstUser3InUse::clear(); }
+
+    AstNUser*	user4p() const {
+	//UASSERT_STATIC(AstUser4InUse::s_userBusy, "user4p set w/o busy");
+	return ((m_user4Cnt==AstUser4InUse::s_userCntGbl)?m_user4p:NULL); }
+    void	user4p(void* userp) { m_user4p=(AstNUser*)(userp); m_user4Cnt=AstUser4InUse::s_userCntGbl; }
     int		user4() const { return user4p()->castInt(); }
-    AstNUser*	user4p() const { return ((m_user4Cnt==s_user4CntGbl)?m_user4p:NULL); }
-    void	user4p(void* userp) { m_user4p=(AstNUser*)(userp); m_user4Cnt=s_user4CntGbl; }
     void	user4(int val) { user4p(AstNUser::fromInt(val)); }
-    static void	user4ClearTree() { s_user4CntGbl++; }  // Clear userp()'s across the entire tree
-    int		user5() const { return user5p()->castInt(); }
-    AstNUser*	user5p() const { return ((m_user5Cnt==s_user5CntGbl)?m_user5p:NULL); }
-    void	user5p(void* userp) { m_user5p=(AstNUser*)(userp); m_user5Cnt=s_user5CntGbl; }
-    void	user5(int val) { user5p(AstNUser::fromInt(val)); }
-    static void	user5ClearTree() { s_user5CntGbl++; }  // Clear userp()'s across the entire tree
+    static void	user4ClearTree() { AstUser4InUse::clear(); }
 
     vluint64_t	editCount() const { return m_editCount; }
-    void	editCountInc() { m_editCount = s_editCntGbl++; }
+    void	editCountInc() { m_editCount = ++s_editCntGbl; }  // Preincrement, so can "watch AstNode::s_editCntGbl=##"
     static vluint64_t	editCountLast() { return s_editCntLast; }
     static vluint64_t	editCountGbl() { return s_editCntGbl; }
     static void		editCountSetLast() { s_editCntLast = editCountGbl(); }
@@ -642,13 +750,18 @@ public:
     AstNode*	addNext(AstNode* newp);		// Returns this, adds to end of list
     AstNode*	addNextNull(AstNode* newp);	// Returns this, adds to end of list, NULL is OK
     void	addNextHere(AstNode* newp);	// Adds after speced node
+    void	addHereThisAsNext(AstNode* newp); // Adds at old place of this, this becomes next
     void	replaceWith(AstNode* newp);	// Replace current node in tree with new node
-    void	v3errorEnd(ostringstream& str);
+    void	v3errorEnd(ostringstream& str) const;
     virtual void dump(ostream& str=cout);
     AstNode*	unlinkFrBack(AstNRelinker* linkerp=NULL);  // Unlink this from whoever points to it.
     AstNode*	unlinkFrBackWithNext(AstNRelinker* linkerp=NULL);  // Unlink this from whoever points to it, keep entire next list with unlinked node
+    void	swapWith(AstNode* bp);
     void	relink(AstNRelinker* linkerp);	// Generally use linker->relink() instead
     void	cloneRelinkNode() { cloneRelink(); }
+    // Iterate and insert - assumes tree format
+    virtual void addNextStmt(AstNode* newp, AstNode* belowp);  // When calling, "this" is second argument
+    virtual void addBeforeStmt(AstNode* newp, AstNode* belowp);  // When calling, "this" is second argument
 
     // METHODS - Iterate on a tree
     AstNode*	cloneTree(bool cloneNextLink);
@@ -680,6 +793,7 @@ public:
     void	iterateAndNextIgnoreEdit(AstNVisitor& v, AstNUser* vup=NULL);
     void	iterateChildren(AstNVisitor& v, AstNUser* vup=NULL);  // Excludes following this->next
     void	iterateChildrenBackwards(AstNVisitor& v, AstNUser* vup=NULL);  // Excludes following this->next
+    AstNode*	acceptSubtreeReturnEdits(AstNVisitor& v, AstNUser* vup=NULL);  // Return edited nodep; see comments in V3Ast.cpp
 
     // CONVERSION
     AstNode*	castNode() { return this; }
@@ -695,11 +809,15 @@ inline void AstNRelinker::relink(AstNode* newp) { newp->AstNode::relink(this); }
 //######################################################################
 //=== AstNode* : Derived generic node types
 
+#define ASTNODE_BASE_FUNCS(name)	\
+    virtual ~Ast ##name() {} \
+    Ast ##name * cloneTree(bool cloneNext) { return AstNode::cloneTree(cloneNext)->cast ##name(); }
+
 struct AstNodeMath : public AstNode {
     // Math -- anything that's part of an expression tree
     AstNodeMath(FileLine* fl)
 	: AstNode(fl) {}
-    virtual ~AstNodeMath() {}
+    ASTNODE_BASE_FUNCS(NodeMath)
     // METHODS
     virtual string emitVerilog() = 0;  /// Format string for verilog writing; see V3EmitV
     virtual string emitC() = 0;
@@ -711,7 +829,10 @@ struct AstNodeTermop : public AstNodeMath {
     // Terminal operator -- a operator with no "inputs"
     AstNodeTermop(FileLine* fl)
 	: AstNodeMath(fl) {}
-    virtual ~AstNodeTermop() {}
+    ASTNODE_BASE_FUNCS(NodeTermop)
+    // Know no children, and hot function, so skip iterator for speed
+    // See checkTreeIter also that asserts no children
+    void iterateChildren(AstNVisitor& v, AstNUser* vup=NULL) { }
 };
 
 struct AstNodeUniop : public AstNodeMath {
@@ -720,7 +841,7 @@ struct AstNodeUniop : public AstNodeMath {
 	: AstNodeMath(fl) {
 	if (lhsp) widthSignedFrom(lhsp);
 	setOp1p(lhsp); }
-    virtual ~AstNodeUniop() {}
+    ASTNODE_BASE_FUNCS(NodeUniop)
     AstNode*	lhsp() 	const { return op1p()->castNode(); }
     // METHODS
     virtual void numberOperate(V3Number& out, const V3Number& lhs) = 0; // Set out to evaluation of a AstConst'ed lhs
@@ -736,7 +857,7 @@ struct AstNodeBiop : public AstNodeMath {
     AstNodeBiop(FileLine* fl, AstNode* lhs, AstNode* rhs)
 	: AstNodeMath(fl) {
 	setOp1p(lhs); setOp2p(rhs); }
-    virtual ~AstNodeBiop() {}
+    ASTNODE_BASE_FUNCS(NodeBiop)
     AstNode*	lhsp() 	const { return op1p()->castNode(); }
     AstNode*	rhsp() 	const { return op2p()->castNode(); }
     void	lhsp(AstNode* nodep)  { return setOp1p(nodep); }
@@ -758,7 +879,7 @@ struct AstNodeTriop : public AstNodeMath {
     AstNodeTriop(FileLine* fl, AstNode* lhs, AstNode* rhs, AstNode* ths)
 	: AstNodeMath(fl) {
 	setOp1p(lhs); setOp2p(rhs); setOp3p(ths); }
-    virtual ~AstNodeTriop() {}
+    ASTNODE_BASE_FUNCS(NodeTriop)
     AstNode*	lhsp() 	const { return op1p()->castNode(); }
     AstNode*	rhsp() 	const { return op2p()->castNode(); }
     AstNode*	thsp() 	const { return op3p()->castNode(); }
@@ -782,14 +903,14 @@ struct AstNodeBiCom : public AstNodeBiop {
     // Binary math with commutative properties
     AstNodeBiCom(FileLine* fl, AstNode* lhs, AstNode* rhs)
 	: AstNodeBiop(fl, lhs, rhs) {}
-    virtual ~AstNodeBiCom() {}
+    ASTNODE_BASE_FUNCS(NodeBiCom)
 };
 
 struct AstNodeBiComAsv : public AstNodeBiCom {
     // Binary math with commutative & associative properties
     AstNodeBiComAsv(FileLine* fl, AstNode* lhs, AstNode* rhs)
 	: AstNodeBiCom(fl, lhs, rhs) {}
-    virtual ~AstNodeBiComAsv() {}
+    ASTNODE_BASE_FUNCS(NodeBiComAsv)
 };
 struct AstNodeCond : public AstNodeTriop {
     AstNodeCond(FileLine* fl, AstNode* condp, AstNode* expr1p, AstNode* expr2p)
@@ -797,7 +918,7 @@ struct AstNodeCond : public AstNodeTriop {
 	if (expr1p) widthSignedFrom(expr1p);
 	else if (expr2p) widthSignedFrom(expr2p);
     }
-    virtual ~AstNodeCond() {}
+    ASTNODE_BASE_FUNCS(NodeCond)
     virtual void numberOperate(V3Number& out, const V3Number& lhs, const V3Number& rhs, const V3Number& ths) {
 	if (lhs.isNeqZero()) out.opAssign(rhs); else out.opAssign(ths); }
     AstNode*	condp() 	const { return op1p()->castNode(); }	// op1 = Condition
@@ -818,13 +939,16 @@ struct AstNodePreSel : public AstNode {
     AstNodePreSel(FileLine* fl, AstNode* lhs, AstNode* rhs, AstNode* ths)
 	: AstNode(fl) {
 	setOp1p(lhs); setOp2p(rhs); setNOp3p(ths); }
-    virtual ~AstNodePreSel() {}
+    ASTNODE_BASE_FUNCS(NodePreSel)
     AstNode*	lhsp() 	const { return op1p()->castNode(); }
+    AstNode*	fromp() const { return lhsp(); }
     AstNode*	rhsp() 	const { return op2p()->castNode(); }
     AstNode*	thsp() 	const { return op3p()->castNode(); }
+    AstAttrOf*	attrp() const { return op4p()->castAttrOf(); }
     void	lhsp(AstNode* nodep)  { return setOp1p(nodep); }
     void	rhsp(AstNode* nodep)  { return setOp2p(nodep); }
     void	thsp(AstNode* nodep)  { return setOp3p(nodep); }
+    void	attrp(AstAttrOf* nodep)  { return setOp4p((AstNode*)nodep); }
     // METHODS
     virtual V3Hash sameHash() const { return V3Hash(); }
     virtual bool same(AstNode*) const { return true; }
@@ -834,8 +958,10 @@ struct AstNodeStmt : public AstNode {
     // Statement -- anything that's directly under a function
     AstNodeStmt(FileLine* fl)
 	: AstNode(fl) {}
-    virtual ~AstNodeStmt() {}
+    ASTNODE_BASE_FUNCS(NodeStmt)
     // METHODS
+    virtual void addNextStmt(AstNode* newp, AstNode* belowp);  // Stop statement searchback here 
+    virtual void addBeforeStmt(AstNode* newp, AstNode* belowp);  // Stop statement searchback here 
 };
 
 struct AstNodeAssign : public AstNodeStmt {
@@ -844,7 +970,7 @@ struct AstNodeAssign : public AstNodeStmt {
 	setOp1p(rhsp); setOp2p(lhsp);
 	if (lhsp) widthSignedFrom(lhsp);
     }
-    virtual ~AstNodeAssign() {}
+    ASTNODE_BASE_FUNCS(NodeAssign)
     virtual AstNode*	cloneType(AstNode* lhsp, AstNode* rhsp)=0;	// Clone single node, just get same type back.
     // So iteration hits the RHS which is "earlier" in execution order, it's op1, not op2
     AstNode* rhsp()		const { return op1p()->castNode(); }	// op1 = Assign from
@@ -863,13 +989,12 @@ struct AstNodeFor : public AstNodeStmt {
 	: AstNodeStmt(fileline) {
 	addNOp1p(initsp); setOp2p(condp); addNOp3p(incsp); addNOp4p(bodysp);
     }
-    virtual ~AstNodeFor() {}
+    ASTNODE_BASE_FUNCS(NodeFor)
     AstNode*	initsp()	const { return op1p()->castNode(); }	// op1= initial statements
     AstNode*	condp()		const { return op2p()->castNode(); }	// op2= condition to continue
     AstNode*	incsp()		const { return op3p()->castNode(); }	// op3= increment statements
     AstNode*	bodysp()	const { return op4p()->castNode(); }	// op4= body of loop
     virtual bool isGateOptimizable() const { return false; }
-    virtual bool isPredictOptimizable() const { return false; }
     virtual int  instrCount() const { return instrCountBranch(); }
     virtual V3Hash sameHash() const { return V3Hash(); }
     virtual bool same(AstNode* samep) const { return true; }
@@ -883,7 +1008,7 @@ public:
 	: AstNodeStmt(fl) {
 	setOp1p(condp); addNOp2p(ifsp); addNOp3p(elsesp);
     }
-    virtual ~AstNodeIf() {}
+    ASTNODE_BASE_FUNCS(NodeIf)
     AstNode*	condp()		const { return op1p(); }	// op1 = condition
     AstNode*	ifsp()		const { return op2p(); }	// op2 = list of true statements
     AstNode*	elsesp()	const { return op3p(); }	// op3 = list of false statements
@@ -903,7 +1028,7 @@ struct AstNodeCase : public AstNodeStmt {
 	: AstNodeStmt(fl) {
 	setOp1p(exprp); addNOp2p(casesp);
     }
-    virtual ~AstNodeCase() {}
+    ASTNODE_BASE_FUNCS(NodeCase)
     virtual int   instrCount()	const { return instrCountBranch(); }
     AstNode*	  exprp()	const { return op1p()->castNode(); }	// op1 = case condition <expression>
     AstCaseItem*  itemsp()	const { return op2p()->castCaseItem(); }  // op2 = list of case expressions
@@ -912,8 +1037,19 @@ struct AstNodeCase : public AstNodeStmt {
     void addNotParallelp(AstNode* nodep) { setOp3p(nodep); }
 };
 
+struct AstNodeSenItem : public AstNode {
+    // An AstSenItem or AstSenGate
+    AstNodeSenItem(FileLine* fl) : AstNode(fl) {}
+    ASTNODE_BASE_FUNCS(NodeSenItem)
+    virtual bool isClocked() const = 0;
+    virtual bool isCombo() const = 0;
+    virtual bool isInitial() const = 0;
+    virtual bool isSettle() const = 0;
+    virtual bool isNever() const = 0;
+};
+
 class AstNodeVarRef : public AstNodeMath {
-    // A AstVarRef or AstVarXRef
+    // An AstVarRef or AstVarXRef
 private:
     bool	m_lvalue;	// Left hand side assignment
     AstVar*	m_varp;		// [AfterLink] Pointer to variable itself
@@ -932,12 +1068,12 @@ public:
 	// May have varp==NULL
 	if (m_varp) widthSignedFrom((AstNode*)m_varp);
     }
-    virtual ~AstNodeVarRef() {}
+    ASTNODE_BASE_FUNCS(NodeVarRef)
     virtual bool broken() const;
     virtual int instrCount() const { return widthInstrs(); }
     virtual void cloneRelink();
     virtual string name()	const { return m_name; }		// * = Var name
-    void 	name(const string& name) 	{ m_name = name; }
+    virtual void name(const string& name) { m_name = name; }
     bool	lvalue() const { return m_lvalue; }
     void	lvalue(bool lval) { m_lvalue=lval; }  // Avoid using this; Set in constructor
     AstVar*	varp() const { return m_varp; }				// [After Link] Pointer to variable
@@ -948,6 +1084,9 @@ public:
     void hiername(const string& hn) { m_hiername = hn; }
     bool hierThis() const { return m_hierThis; }
     void hierThis(bool flag) { m_hierThis = flag; }
+    // Know no children, and hot function, so skip iterator for speed
+    // See checkTreeIter also that asserts no children
+    void iterateChildren(AstNVisitor& v, AstNUser* vup=NULL) { }
 };
 
 class AstNodePli : public AstNodeStmt {
@@ -956,7 +1095,7 @@ public:
     AstNodePli(FileLine* fl, const string& text, AstNode* exprsp)
 	: AstNodeStmt(fl), m_text(text) {
 	addNOp1p(exprsp); }
-    virtual ~AstNodePli() {}
+    ASTNODE_BASE_FUNCS(NodePli)
     virtual string name()	const { return m_text; }
     virtual int instrCount()	const { return instrCountPli(); }
     void exprsp(AstNode* nodep)	{ addOp1p(nodep); }	// op1 = Expressions to output
@@ -975,7 +1114,7 @@ public:
 	: AstNode(fileline) {
 	m_text = textp;	// Copy it
     }
-    virtual ~AstNodeText() {}
+    ASTNODE_BASE_FUNCS(NodeText)
     const string& text() const { return m_text; }
     virtual V3Hash sameHash() const { return V3Hash(text()); }
     virtual bool same(AstNode* samep) const {
@@ -1005,13 +1144,13 @@ public:
 	, m_name(name), m_taskPublic(false) {
 	addNOp3p(stmtsp);
     }
-    virtual ~AstNodeFTask() {}
+    ASTNODE_BASE_FUNCS(NodeFTask)
     virtual void dump(ostream& str=cout);
     virtual string name()	const { return m_name; }		// * = Var name
     virtual bool maybePointedTo() const { return true; }
     // {AstFunc only} op1 = Range output variable
     // op3 = Statements/Ports/Vars
-    void 	name(const string& name) 	{ m_name = name; }
+    virtual void name(const string& name) 	{ m_name = name; }
     AstNode*	stmtsp() 	const { return op3p()->castNode(); }	// op1 = List of statements
     void	addStmtsp(AstNode* nodep) { addOp3p(nodep); }
     void	taskPublic(bool flag) { m_taskPublic=flag; }
@@ -1031,7 +1170,7 @@ public:
 	, m_taskp(NULL) {
 	setOp1p(namep);	addNOp2p(pinsp);
     }
-    virtual ~AstNodeFTaskRef() {}
+    ASTNODE_BASE_FUNCS(NodeFTaskRef)
     virtual bool broken() const { return m_taskp && !m_taskp->brokeExists(); }
     virtual void cloneRelink() { if (m_taskp && m_taskp->clonep()) {
 	m_taskp = m_taskp->clonep()->castNodeFTask();
@@ -1044,7 +1183,7 @@ public:
     void	inlinedDots(const string& flag) { m_inlinedDots = flag; }
     AstNodeFTask*	taskp() const { return m_taskp; }		// [After Link] Pointer to variable
     void  	taskp(AstNodeFTask* taskp) { m_taskp=taskp; }
-    void	name(const string& name) { m_name = name; }
+    virtual void name(const string& name) { m_name = name; }
     void	dotted(const string& name) { m_dotted = name; }
     // op1 = namep
     AstNode*	namep()		const { return op1p(); }

src/V3AstNodes.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -51,11 +52,11 @@ bool AstVar::isSigPublic() const {
 }
 
 bool AstVar::isScQuad() const {
-    return (isSc()&&isQuad()&&v3Global.opt.pins64());
+    return (isSc() && isQuad() && !isScBv());
 }
 
-bool AstVar::isScWide() const {
-    return (isWide() || isSc()&&isQuad()&&!v3Global.opt.pins64());
+bool AstVar::isScBv() const {
+    return (isSc() && width() >= v3Global.opt.pinsBv());
 }
 
 void AstVar::combineType(AstVarType type) {
@@ -108,7 +109,7 @@ string AstVar::cType() const {
 	return "bool";
     } else if (widthMin() <= VL_WORDSIZE) {
 	return "uint32_t";
-    } else if (isScWide()) {
+    } else if (isWide()) {
 	return "uint32_t";  // []'s added later
     } else {
 	return "uint64_t";
@@ -116,12 +117,18 @@ string AstVar::cType() const {
 }
 
 string AstVar::scType() const {
-    if (widthMin() == 1) {
+    if (isScBv()) {
+	return (string("sc_bv<")+cvtToStr(widthMin())+"> ");  // Keep the space so don't get >>
+    } else if (widthMin() == 1) {
 	return "bool";
     } else if (widthMin() <= VL_WORDSIZE) {
-	return "uint32_t";
-    } else if (isScWide()) {
-	return (string("sc_bv<")+cvtToStr(widthMin())+"> ");  // Keep the space so don't get >>
+	if (widthMin() <= 8 && v3Global.opt.pinsUint8()) {
+	    return "uint8_t";
+	} else if (widthMin() <= 16 && v3Global.opt.pinsUint8()) {
+	    return "uint16_t";
+	} else {
+	    return "uint32_t";
+	}
     } else {
 	return "uint64_t";
     }
@@ -134,6 +141,14 @@ AstRange* AstVar::arrayp(int dimension) const {
     return NULL;
 }
 
+int AstVar::arrayDimensions() const {
+    int  entries=0;
+    for (AstRange* arrayp=this->arraysp(); arrayp; arrayp = arrayp->nextp()->castRange()) {
+	entries++;
+    }
+    return entries;
+}
+
 uint32_t AstVar::arrayElements() const {
     uint32_t entries=1;
     for (AstRange* arrayp=this->arraysp(); arrayp; arrayp = arrayp->nextp()->castRange()) {
@@ -142,6 +157,37 @@ uint32_t AstVar::arrayElements() const {
     return entries;
 }
 
+// Special operators
+int AstArraySel::dimension(AstNode* nodep) {	///< How many dimensions is this reference from the base variable?
+    // Only called after V3Param; so only ArraySel's need to be recursed
+    int dim = 0;
+    while (nodep) {
+	if (nodep->castNodeSel()) { dim++; nodep=nodep->castNodeSel()->fromp(); continue; }
+	if (nodep->castNodePreSel()) { dim++; nodep=nodep->castNodePreSel()->fromp(); continue; }
+	break;
+    }
+    return dim;
+}
+AstNode* AstArraySel::baseFromp(AstNode* nodep) {	///< What is the base variable (or const) this dereferences?
+    // Else AstArraySel etc; search for the base
+    while (nodep) {
+	if (nodep->castArraySel()) { nodep=nodep->castArraySel()->fromp(); continue; }
+	else if (nodep->castSel()) { nodep=nodep->castSel()->fromp(); continue; }
+	// AstNodeSelPre stashes the associated variable under a ATTROF so it isn't constified
+	else if (nodep->castAttrOf()) { nodep=nodep->castAttrOf()->fromp(); continue; }
+	else if (nodep->castNodePreSel()) {
+	    if (nodep->castNodePreSel()->attrp()) {
+		nodep=nodep->castNodePreSel()->attrp();
+	    } else {
+		nodep=nodep->castNodePreSel()->lhsp();
+	    }
+	    continue;
+	}
+	else break;
+    }
+    return nodep;
+}
+
 bool AstScope::broken() const {
     return ((m_aboveScopep && !m_aboveScopep->brokeExists())
 	    || (m_aboveCellp && !m_aboveCellp->brokeExists())
@@ -163,118 +209,97 @@ string AstScope::nameDotless() const {
     return dotless;
 }
 
-struct AstSenItemCmp {
-    inline bool operator () (const AstSenItem* lhsp, const AstSenItem* rhsp) const {
-	// Looks visually better if we keep sorted by name
-	if (lhsp->edgeType() < rhsp->edgeType()) return true;
-	if (lhsp->edgeType() > rhsp->edgeType()) return false;
-	if (!lhsp->varrefp() &&  rhsp->varrefp()) return true;
-	if ( lhsp->varrefp() && !rhsp->varrefp()) return false;
-	if (lhsp->varrefp() && rhsp->varrefp()) {
-	    if (lhsp->varrefp()->name() < rhsp->varrefp()->name()) return true;
-	    if (lhsp->varrefp()->name() > rhsp->varrefp()->name()) return false;
-	    // But might be same name with different scopes
-	    if (lhsp->varrefp()->varScopep() < rhsp->varrefp()->varScopep()) return true;
-	    if (lhsp->varrefp()->varScopep() > rhsp->varrefp()->varScopep()) return false;
-	}
-	return false;
-    }
-};
-
-void AstSenTree::sortSenses() {
-    // Sort the sensitivity names so "posedge a or b" and "posedge b or a" end up together.
-    // Also, remove duplicate assignments, and fold POS&NEGs into ANYEDGEs
-    //cout<<endl; this->dumpTree(cout,"ssin: ");
-    AstSenItem* nextp;
-    // Make things a little faster; check first if we need a sort
-    for (AstSenItem* senp = sensesp(); senp; senp=senp->nextp()->castSenItem()) {
-	nextp=senp->nextp()->castSenItem();
-	AstSenItemCmp cmp;
-	if (nextp && !cmp(senp, nextp)) {
-	    // Something's out of order, sort it
-	    senp = NULL;
-	    vector<AstSenItem*> vec;
-	    for (AstSenItem* senp = sensesp(); senp; senp=senp->nextp()->castSenItem()) {
-		vec.push_back(senp);
-	    }
-	    sort(vec.begin(), vec.end(), AstSenItemCmp());
-	    for (vector<AstSenItem*>::iterator it=vec.begin(); it!=vec.end(); ++it) {
-		(*it)->unlinkFrBack();
-	    }
-	    for (vector<AstSenItem*>::iterator it=vec.begin(); it!=vec.end(); ++it) {
-		this->addSensesp(*it);
-	    }
-	    break;
-	}
-    }
-
-    // Pass2, remove dup edges
-    for (AstSenItem* senp = sensesp(); senp; senp=nextp) {
-	nextp=senp->nextp()->castSenItem();
-	AstSenItem* cmpp = nextp;
-	if (cmpp
-	    && ((senp->varrefp() && cmpp->varrefp() && senp->varrefp()->sameTree(cmpp->varrefp()))
-		|| (!senp->varrefp() && !cmpp->varrefp()))) {
-	    // We've sorted in the order ANY, BOTH, POS, NEG, so we don't need to try opposite orders
-	    if ((   senp->edgeType()==AstEdgeType::ANYEDGE)    // ANY  or {BOTH|POS|NEG} -> ANY
-		|| (senp->edgeType()==AstEdgeType::BOTHEDGE)   // BOTH or {POS|NEG} -> BOTH
-		|| (senp->edgeType()==AstEdgeType::POSEDGE     // POS  or NEG -> BOTH
-		    && cmpp->edgeType()==AstEdgeType::NEGEDGE)
-		|| (senp->edgeType()==cmpp->edgeType())		// Identical edges
-		) {
-		// Fix edge of old node
-		if (senp->edgeType()==AstEdgeType::POSEDGE
-		    && cmpp->edgeType()==AstEdgeType::NEGEDGE)
-		    senp->edgeType(AstEdgeType::BOTHEDGE);
-		// Remove redundant node
-		cmpp->unlinkFrBack()->deleteTree(); cmpp=NULL;
-		// Try to collapse again
-		nextp=senp;
-	    }
-	}
-    }
-
-    // Pass3, remove nevers
-    if (sensesp()->nextp()) {   // Else only one never, can't remove it
-	for (AstSenItem* senp = sensesp(); senp; senp=nextp) {
-	    nextp=senp->nextp()->castSenItem();
-	    if (senp->isNever()) {
-		senp->unlinkFrBack()->deleteTree(); senp=NULL;
-	    }
-	}
-    }
-    //this->dumpTree(cout,"ssou: ");
-}
-
 bool AstSenTree::hasClocked() {
     if (!sensesp()) this->v3fatalSrc("SENTREE without any SENITEMs under it");
-    for (AstSenItem* senp = sensesp(); senp; senp=senp->nextp()->castSenItem()) {
+    for (AstNodeSenItem* senp = sensesp(); senp; senp=senp->nextp()->castNodeSenItem()) {
 	if (senp->isClocked()) return true;
     }
     return false;
 }
 bool AstSenTree::hasSettle() {
     if (!sensesp()) this->v3fatalSrc("SENTREE without any SENITEMs under it");
-    for (AstSenItem* senp = sensesp(); senp; senp=senp->nextp()->castSenItem()) {
+    for (AstNodeSenItem* senp = sensesp(); senp; senp=senp->nextp()->castNodeSenItem()) {
 	if (senp->isSettle()) return true;
     }
     return false;
 }
 bool AstSenTree::hasInitial() {
     if (!sensesp()) this->v3fatalSrc("SENTREE without any SENITEMs under it");
-    for (AstSenItem* senp = sensesp(); senp; senp=senp->nextp()->castSenItem()) {
+    for (AstNodeSenItem* senp = sensesp(); senp; senp=senp->nextp()->castNodeSenItem()) {
 	if (senp->isInitial()) return true;
     }
     return false;
 }
 bool AstSenTree::hasCombo() {
     if (!sensesp()) this->v3fatalSrc("SENTREE without any SENITEMs under it");
-    for (AstSenItem* senp = sensesp(); senp; senp=senp->nextp()->castSenItem()) {
+    for (AstNodeSenItem* senp = sensesp(); senp; senp=senp->nextp()->castNodeSenItem()) {
 	if (senp->isCombo()) return true;
     }
     return false;
 }
 
+//======================================================================
+// Special walking tree inserters
+
+void AstNode::addBeforeStmt(AstNode* newp, AstNode*) {
+    if (!backp()) newp->v3fatalSrc("Can't find current statement to addBeforeStmt");
+    // Look up; virtual call will find where to put it
+    this->backp()->addBeforeStmt(newp, this);
+}
+void AstNode::addNextStmt(AstNode* newp, AstNode*) {
+    if (!backp()) newp->v3fatalSrc("Can't find current statement to addBeforeStmt");
+    // Look up; virtual call will find where to put it
+    this->backp()->addNextStmt(newp, this);
+}
+
+void AstNodeStmt::addBeforeStmt(AstNode* newp, AstNode*) {
+    // Insert newp before current node
+    this->addHereThisAsNext(newp);
+}
+void AstNodeStmt::addNextStmt(AstNode* newp, AstNode*) {
+    // Insert newp after current node
+    this->addNextHere(newp);
+}
+
+void AstWhile::addBeforeStmt(AstNode* newp, AstNode* belowp) {
+    // Special, as statements need to be put in different places
+    // Belowp is how we came to recurse up to this point
+    // Preconditions insert first just before themselves (the normal rule for other statement types)
+    if (belowp == precondsp()) {
+	// Must have been first statement in precondsp list, so newp is new first statement
+	belowp->addHereThisAsNext(newp);
+    } else if (belowp == condp()) {
+	// Goes before condition, IE in preconditions
+	addPrecondsp(newp);
+    } else if (belowp == bodysp()) {
+	// Was first statement in body, so new front
+	belowp->addHereThisAsNext(newp);
+    } else {
+	belowp->v3fatalSrc("Doesn't look like this was really under the while");
+    }
+}
+void AstWhile::addNextStmt(AstNode* newp, AstNode* belowp) {
+    // Special, as statements need to be put in different places
+    // Belowp is how we came to recurse up to this point
+    // Preconditions insert first just before themselves (the normal rule for other statement types)
+    if (belowp == precondsp()) {
+	// Next in precond list
+	belowp->addNextHere(newp);
+    } else if (belowp == condp()) {
+	// Becomes first statement in body, body may have been empty
+	if (bodysp()) {
+	    bodysp()->addHereThisAsNext(newp);
+	} else {
+	    addBodysp(newp);
+	}
+    } else if (belowp == bodysp()) {
+	// Next statement in body
+	belowp->addNextHere(newp);
+    } else {
+	belowp->v3fatalSrc("Doesn't look like this was really under the while");
+    }
+}
+
 //======================================================================
 // Per-type Debugging
 
@@ -287,7 +312,12 @@ void AstNode::dump(ostream& os) {
       <<" "<<(isSigned()?"s":"")
       <<"w"<<(widthSized()?"":"u")<<width();
     if (!widthSized()) os<<"/"<<widthMin();
-    if (name()!="") os<<"  "<<name();
+    if (name()!="") os<<"  "<<AstNode::quoteName(name());
+}
+
+void AstAttrOf::dump(ostream& str) {
+    this->AstNode::dump(str);
+    str<<" ["<<attrType().ascii()<<"]";
 }
 void AstCast::dump(ostream& str) {
     this->AstNode::dump(str);
@@ -297,7 +327,6 @@ void AstCell::dump(ostream& str) {
     this->AstNode::dump(str);
     if (modp()) { str<<" -> "; modp()->dump(str); }
     else { str<<" ->UNLINKED:"<<modName(); }
-    if (pinStar()) str<<" [.*]";
 }
 void AstCellInline::dump(ostream& str) {
     this->AstNode::dump(str);
@@ -313,6 +342,10 @@ void AstPin::dump(ostream& str) {
     else { str<<" ->UNLINKED"; }
     if (svImplicit()) str<<" [.SV]";
 }
+void AstRange::dump(ostream& str) {
+    this->AstNode::dump(str);
+    if (littleEndian()) str<<" [LITTLE]";
+}
 void AstVarXRef::dump(ostream& str) {
     this->AstNode::dump(str);
     if (lvalue()) str<<" [LV] => ";
@@ -390,8 +423,18 @@ void AstNodeFTask::dump(ostream& str) {
     this->AstNode::dump(str);
     if (taskPublic()) str<<" [PUBLIC]";
 }
+void AstBegin::dump(ostream& str) {
+    this->AstNode::dump(str);
+    if (unnamed()) str<<" [UNNAMED]";
+}
 void AstCoverDecl::dump(ostream& str) {
     this->AstNode::dump(str);
+    if (this->dataDeclNullp()) {
+	str<<" -> ";
+	this->dataDeclNullp()->dump(str);
+    } else {
+	if (binNum()) { str<<" bin"<<dec<<binNum(); }
+    }
 }
 void AstCoverInc::dump(ostream& str) {
     this->AstNode::dump(str);

src/V3Begin.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -24,6 +25,9 @@
 //	    BEGIN(VAR...) -> VAR ... {renamed}
 //	FOR -> WHILEs
 //
+// There are two scopes; named BEGINs change %m and variable scopes.
+// Unnamed BEGINs change only variable, not $display("%m") scope.
+//
 //*************************************************************************
 
 #include "config_build.h"
@@ -31,7 +35,6 @@
 #include <cstdio>
 #include <cstdarg>
 #include <unistd.h>
-#include <cstring>
 #include <algorithm>
 #include <vector>
 
@@ -47,12 +50,21 @@ private:
     // STATE
     AstModule*		m_modp;		// Current module
     AstNodeFTask* 	m_ftaskp;	// Current function/task
-    string		m_beginScope;	// Name of begin blocks above us
-    //int debug() { return 9; }
+    string		m_namedScope;	// Name of begin blocks above us
+    string		m_unnamedScope;	// Name of begin blocks, including unnamed blocks
+    int			m_repeatNum;	// Repeat counter
+
+    // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
 
     // VISITORS
     virtual void visit(AstModule* nodep, AstNUser*) {
 	m_modp = nodep;
+	m_repeatNum = 0;
 	nodep->iterateChildren(*this);
 	m_modp = NULL;
     }
@@ -64,24 +76,31 @@ private:
     virtual void visit(AstBegin* nodep, AstNUser*) {
 	// Begin blocks were only useful in variable creation, change names and delete
 	UINFO(8,"  "<<nodep<<endl);
-	string oldScope = m_beginScope;
+	string oldScope = m_namedScope;
+	string oldUnnamed = m_unnamedScope;
 	{
-	    //UINFO(8,"nname "<<m_beginScope<<endl);
-	    // Create data for dotted variable resolution
-	    string dottedname = nodep->name() + "__DOT__";  // So always found
-	    string::size_type pos;
-	    while ((pos=dottedname.find("__DOT__")) != string::npos) {
-		string ident = dottedname.substr(0,pos);
-		dottedname = dottedname.substr(pos+strlen("__DOT__"));
-		if (m_beginScope=="") m_beginScope = ident;
-		else m_beginScope = m_beginScope + "__DOT__"+ident;
-		// Create CellInline for dotted resolution
-		AstCellInline* inlinep = new AstCellInline(nodep->fileline(),
-							   m_beginScope, "__BEGIN__");
-		m_modp->addInlinesp(inlinep);  // Must be parsed before any AstCells
+	    //UINFO(8,"nname "<<m_namedScope<<endl);
+	    if (nodep->name() != "") {  // Else unneeded unnamed block
+		// Create data for dotted variable resolution
+		string dottedname = nodep->name() + "__DOT__";  // So always found
+		string::size_type pos;
+		while ((pos=dottedname.find("__DOT__")) != string::npos) {
+		    string ident = dottedname.substr(0,pos);
+		    dottedname = dottedname.substr(pos+strlen("__DOT__"));
+		    if (!nodep->unnamed()) {
+			if (m_namedScope=="") m_namedScope = ident;
+			else m_namedScope = m_namedScope + "__DOT__"+ident;
+		    }
+		    if (m_unnamedScope=="") m_unnamedScope = ident;
+		    else m_unnamedScope = m_unnamedScope + "__DOT__"+ident;
+		    // Create CellInline for dotted var resolution
+		    AstCellInline* inlinep = new AstCellInline(nodep->fileline(),
+							       m_unnamedScope, "__BEGIN__");
+		    m_modp->addInlinesp(inlinep);  // Must be parsed before any AstCells
+		}
 	    }
 
-	    // Remap var names
+	    // Remap var names and replace lower Begins
 	    nodep->iterateChildren(*this);
 
 	    if (AstNode* stmtsp = nodep->stmtsp()) {
@@ -92,12 +111,13 @@ private:
 	    }
 	    pushDeletep(nodep); nodep=NULL;
 	}
-	m_beginScope = oldScope;
+	m_namedScope = oldScope;
+	m_unnamedScope = oldUnnamed;
     }
     virtual void visit(AstVar* nodep, AstNUser*) {
-	if (m_beginScope != "") {
+	if (m_unnamedScope != "") {
 	    // Rename it
-	    nodep->name(m_beginScope+"__DOT__"+nodep->name());
+	    nodep->name(m_unnamedScope+"__DOT__"+nodep->name());
 	    // Move to module
 	    nodep->unlinkFrBack();
 	    if (m_ftaskp) m_ftaskp->addStmtsp(nodep);   // Begins under funcs just move into the func
@@ -106,9 +126,9 @@ private:
     }
     virtual void visit(AstCell* nodep, AstNUser*) {
 	UINFO(8,"   CELL "<<nodep<<endl);
-	if (m_beginScope != "") {
+	if (m_namedScope != "") {
 	    // Rename it
-	    nodep->name(m_beginScope+"__DOT__"+nodep->name());
+	    nodep->name(m_namedScope+"__DOT__"+nodep->name());
 	    UINFO(8,"     rename to "<<nodep->name()<<endl);
 	    // Move to module
 	    nodep->unlinkFrBack();
@@ -131,18 +151,55 @@ private:
 	nodep->replaceWith(newp);
 	nodep->deleteTree(); nodep=NULL;
     }
+    virtual void visit(AstRepeat* nodep, AstNUser*) {
+	// So later optimizations don't need to deal with them,
+	//    REPEAT(count,body) -> loop=count,WHILE(loop>0) { body, loop-- }
+	// Note var can be signed or unsigned based on original number.
+	AstNode* countp = nodep->countp()->unlinkFrBackWithNext();
+   	string name = string("__Vrepeat")+cvtToStr(m_repeatNum++);
+	AstVar* varp = new AstVar(nodep->fileline(), AstVarType::BLOCKTEMP, name,
+				  new AstRange(nodep->fileline(), countp->width()-1, 0));
+	m_modp->addStmtp(varp);
+	AstNode* initsp = new AstAssign(nodep->fileline(), new AstVarRef(nodep->fileline(), varp, true),
+					countp);
+	AstNode* decp = new AstAssign(nodep->fileline(), new AstVarRef(nodep->fileline(), varp, true),
+				      new AstSub(nodep->fileline(), new AstVarRef(nodep->fileline(), varp, false),
+						 new AstConst(nodep->fileline(), 1)));
+	AstNode* condp;
+	if (countp->isSigned()) {
+	    condp = new AstGtS(nodep->fileline(), new AstVarRef(nodep->fileline(), varp, false),
+			       new AstConst(nodep->fileline(), 0));
+	} else {
+	    condp = new AstGt (nodep->fileline(), new AstVarRef(nodep->fileline(), varp, false),
+			       new AstConst(nodep->fileline(), 0));
+	}
+	AstNode* bodysp = nodep->bodysp(); if (bodysp) bodysp->unlinkFrBackWithNext();
+	bodysp = bodysp->addNext(decp);
+	AstNode* newp = new AstWhile(nodep->fileline(),
+				     condp,
+				     bodysp);
+	initsp = initsp->addNext(newp);
+	newp = initsp;
+	nodep->replaceWith(newp);
+	nodep->deleteTree(); nodep=NULL;
+    }
     virtual void visit(AstScopeName* nodep, AstNUser*) {
 	// If there's a %m in the display text, we add a special node that will contain the name()
 	// Similar code in V3Inline
-	if (m_beginScope != "") {
+	if (m_namedScope != "") {
 	    // To keep correct visual order, must add before other Text's
 	    AstNode* afterp = nodep->scopeAttrp();
 	    if (afterp) afterp->unlinkFrBackWithNext();
-	    nodep->scopeAttrp(new AstText(nodep->fileline(), (string)"."+AstNode::prettyName(m_beginScope)));
+	    nodep->scopeAttrp(new AstText(nodep->fileline(), (string)"."+AstNode::prettyName(m_namedScope)));
 	    if (afterp) nodep->scopeAttrp(afterp);
 	}
 	nodep->iterateChildren(*this);
     }
+    virtual void visit(AstCoverDecl* nodep, AstNUser*) {
+	// Don't need to fix path in coverage statements, they're not under
+	// any BEGINs, but V3Coverage adds them all under the module itself.
+	nodep->iterateChildren(*this);
+    }
     virtual void visit(AstNode* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
     }
@@ -151,6 +208,7 @@ public:
     BeginVisitor(AstNetlist* nodep) {
 	m_modp = NULL;
 	m_ftaskp = NULL;
+	m_repeatNum = 0;
 	nodep->accept(*this);
     }
     virtual ~BeginVisitor() {}

src/V3Begin.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Branch.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -43,9 +44,14 @@ private:
     // STATE
     int		m_likely;	// Excuses for branch likely taken
     int		m_unlikely;	// Excuses for branch likely not taken
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     void reset() {
 	m_likely = false;
 	m_unlikely = false;

src/V3Branch.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Broken.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -129,9 +130,9 @@ public:
 		    // Use only AstNode::dump instead of the virtual one, as there
 		    // may be varp() and other cross links that are bad.
 		    if (debug()) {
-			cout<<"%Error: LeakedNode"<<(it->first->backp()?"Back: ":": ");
-			((AstNode*)(it->first))->AstNode::dump(cout);
-			cout<<endl;
+			cerr<<"%Error: LeakedNode"<<(it->first->backp()?"Back: ":": ");
+			((AstNode*)(it->first))->AstNode::dump(cerr);
+			cerr<<endl;
 			V3Error::incErrors();
 		    }
 		    it->second |= FLAG_LEAKED;

src/V3Broken.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Case.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -58,7 +59,12 @@
 class CaseLintVisitor : public AstNVisitor {
 private:
     AstNodeCase* m_caseExprp;	// Under a CASE value node, if so the relevant case statement
-    //int debug() { return 9; }
+
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
 
     virtual void visit(AstNodeCase* nodep, AstNUser*) {
 	// Detect multiple defaults
@@ -118,6 +124,7 @@ private:
     // NODE STATE
     // Cleared each Case
     //  AstIf::user3()		-> bool.  Set true to indicate clone not needed
+    AstUser3InUse	m_inuser3;
 
     // STATE
     V3Double0	m_statCaseFast;	// Statistic tracking
@@ -129,9 +136,13 @@ private:
     int		m_caseNoOverlapsAllCovered;	// Proven to be synopsys parallel_case compliant
     AstNode*	m_valueItem[1<<CASE_OVERLAP_WIDTH];  // For each possible value, the case branch we need
 
-    //int debug() { return 9; }
-
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     bool isCaseTreeFast(AstCase* nodep) {
 	int width = 0;
 	m_caseItems = 0;
@@ -208,6 +219,7 @@ private:
 	if (msb<0) {
 	    // There's no space for a IF.  We know upperValue is thus down to a specific
 	    // exact value, so just return the tree value
+	    // Note can't clone here, as we're going to check for equivelence above
 	    return m_valueItem[upperValue];
 	}
 	else {
@@ -273,6 +285,8 @@ private:
 
 	AstNode::user3ClearTree();
 	AstNode* ifrootp = replaceCaseFastRecurse(cexprp, m_caseWidth-1, 0UL);
+	// Case expressions can't be linked twice, so clone them
+	if (ifrootp && !ifrootp->user3()) ifrootp = ifrootp->cloneTree(true);
 
 	if (ifrootp) nodep->replaceWith(ifrootp);
 	else nodep->unlinkFrBack();

src/V3Case.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Cast.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2004-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2004-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -60,11 +61,17 @@ private:
     // NODE STATE
     // Entire netlist:
     //   AstNode::user()		// bool.  Indicates node is of known size
+    AstUser1InUse	m_inuser1;
 
     // STATE
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     void insertCast(AstNode* nodep, int needsize) {  // We'll insert ABOVE passed node
 	UINFO(4,"  NeedCast "<<nodep<<endl);
 	AstNRelinker relinkHandle;
@@ -76,7 +83,7 @@ private:
 	//if (debug()>8) castp->dumpTree(cout,"-castins: ");
 	//
 	insureLower32Cast(castp);
-	nodep->user(1);  // Now must be of known size
+	nodep->user1(1);  // Now must be of known size
     }
     int castSize (AstNode* nodep) {
 	if (nodep->isQuad()) return VL_QUADSIZE;
@@ -86,7 +93,7 @@ private:
     }
     void insureCast(AstNode* nodep) {
 	if (castSize(nodep->backp()) != castSize(nodep)
-	    || !nodep->user()) {
+	    || !nodep->user1()) {
 	    insertCast(nodep, castSize(nodep->backp()));
 	}
     }
@@ -104,21 +111,21 @@ private:
     // VISITORS
     virtual void visit(AstNodeUniop* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
-	nodep->user(nodep->lhsp()->user());
+	nodep->user1(nodep->lhsp()->user1());
 	if (nodep->sizeMattersLhs()) insureCast(nodep->lhsp());
     }
     virtual void visit(AstNodeBiop* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
-	nodep->user(nodep->lhsp()->user()
-		    | nodep->rhsp()->user());
+	nodep->user1(nodep->lhsp()->user1()
+		    | nodep->rhsp()->user1());
 	if (nodep->sizeMattersLhs()) insureCast(nodep->lhsp());
 	if (nodep->sizeMattersRhs()) insureCast(nodep->rhsp());
     }
     virtual void visit(AstNodeTriop* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
-	nodep->user(nodep->lhsp()->user()
-		    | nodep->rhsp()->user()
-		    | nodep->thsp()->user());
+	nodep->user1(nodep->lhsp()->user1()
+		    | nodep->rhsp()->user1()
+		    | nodep->thsp()->user1());
 	if (nodep->sizeMattersLhs()) insureCast(nodep->lhsp());
 	if (nodep->sizeMattersRhs()) insureCast(nodep->rhsp());
 	if (nodep->sizeMattersThs()) insureCast(nodep->thsp());
@@ -126,11 +133,11 @@ private:
     virtual void visit(AstCast* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
 	insureLower32Cast(nodep);
-	nodep->user(1);
+	nodep->user1(1);
     }
     virtual void visit(AstUnaryMin* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
-	nodep->user(nodep->lhsp()->user());
+	nodep->user1(nodep->lhsp()->user1());
 	if (nodep->lhsp()->widthMin()==1) {
 	    // We want to avoid a GCC "converting of negative value" warning
 	    // from our expansion of
@@ -150,13 +157,13 @@ private:
 	    //  CData x=3;  out = (QData)(x<<30);
 	    insertCast (nodep, castSize(nodep));
 	}
-	nodep->user(1);
+	nodep->user1(1);
     }
     virtual void visit(AstConst* nodep, AstNUser*) {
 	// Constants are of unknown size if smaller than 33 bits, becase
 	// we're too lazy to wrap every constant in the universe in
 	// ((IData)#).
-	nodep->user(nodep->isQuad() || nodep->isWide());
+	nodep->user1(nodep->isQuad() || nodep->isWide());
     }
 
     // NOPs
@@ -171,7 +178,6 @@ private:
 public:
     // CONSTUCTORS
     CastVisitor(AstNetlist* nodep) {
-	AstNode::userClearTree();
 	nodep->accept(*this);
     }
     virtual ~CastVisitor() {}

src/V3Cast.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2004-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2004-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Changed.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -50,14 +51,21 @@ class ChangedVisitor : public AstNVisitor {
 private:
     // NODE STATE
     // Entire netlist:
-    //  AstVarScope::user()		-> bool.  True indicates processed
+    //  AstVarScope::user1()		-> bool.  True indicates processed
+    AstUser1InUse	m_inuser1;
+
     // STATE
     AstModule*		m_topModp;	// Top module
     AstScope*		m_scopetopp;	// Scope under TOPSCOPE
     AstCFunc*		m_chgFuncp;	// Change function we're building
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     void genChangeDet(AstVarScope* vscp) {
 #ifdef NEW_ORDERING
 	vscp->v3fatalSrc("Not applicable\n");
@@ -101,7 +109,7 @@ private:
     virtual void visit(AstTopScope* nodep, AstNUser*) {
 	UINFO(4," TS "<<nodep<<endl);
 	// Clearing
-	AstNode::userClearTree();
+	AstNode::user1ClearTree();
 	// Create the change detection function
 	AstScope* scopep = nodep->scopep();
 	if (!scopep) nodep->v3fatalSrc("No scope found on top level, perhaps you have no statements?\n");
@@ -120,8 +128,8 @@ private:
     virtual void visit(AstVarScope* nodep, AstNUser*) {
 	if (nodep->isCircular()) {
 	    UINFO(8,"  CIRC "<<nodep<<endl);
-	    if (!nodep->user()) {
-		nodep->user(true);
+	    if (!nodep->user1()) {
+		nodep->user1(true);
 		genChangeDet(nodep);
 	    }
 	}

src/V3Changed.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Clean.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -47,15 +48,22 @@ private:
     // Entire netlist:
     //  AstNode::user()		-> CleanState.  For this node, 0==UNKNOWN
     //  AstNode::user2()	-> bool.  True indicates minWidth has been propagated
+    AstUser1InUse	m_inuser1;
+    AstUser2InUse	m_inuser2;
+
+    // TYPES
+    enum CleanState { UNKNOWN, CLEAN, DIRTY };
 
     // STATE
     AstModule* m_modp;
-    //int debug() { return 9; }
-
-    // ENUMS
-    enum CleanState { UNKNOWN, CLEAN, DIRTY };
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     // Width resetting
     int  cppWidth(AstNode* nodep) {
 	if (nodep->width()<=VL_WORDSIZE) return VL_WORDSIZE;
@@ -78,10 +86,10 @@ private:
 
     // Store the clean state in the userp on each node
     void setCleanState(AstNode* nodep, CleanState clean) {
-	nodep->user(clean);
+	nodep->user1(clean);
     }
     CleanState getCleanState(AstNode* nodep) {
-	return ((CleanState)nodep->user());
+	return ((CleanState)nodep->user1());
     }
     bool isClean(AstNode* nodep) {
 	CleanState clstate = getCleanState(nodep);
@@ -155,6 +163,7 @@ private:
     virtual void visit(AstModule* nodep, AstNUser*) {
 	m_modp = nodep;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstNodeUniop* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
@@ -253,13 +262,10 @@ private:
 
 public:
     // CONSTUCTORS
-    CleanVisitor() {}
-    virtual ~CleanVisitor() {}
-    void main(AstNetlist* nodep) {
-	AstNode::userClearTree();	// userp() used on entire tree
-	AstNode::user2ClearTree();	// userp() used on entire tree
+    CleanVisitor(AstNetlist* nodep) {
 	nodep->accept(*this);
     }
+    virtual ~CleanVisitor() {}
 };
 
 //######################################################################
@@ -267,6 +273,5 @@ public:
 
 void V3Clean::cleanAll(AstNetlist* nodep) {
     UINFO(2,__FUNCTION__<<": "<<endl);
-    CleanVisitor visitor;
-    visitor.main(nodep);
+    CleanVisitor visitor (nodep);
 }

src/V3Clean.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3ClkGater.cpp

@@ -0,0 +1,918 @@
+// -*- C++ -*-
+//*************************************************************************
+// DESCRIPTION: Verilator: Break always into sensitivity active domains
+//
+// Code available from: http://www.veripool.org/verilator
+//
+// AUTHORS: Wilson Snyder with Paul Wasson, Duane Gabli
+//
+//*************************************************************************
+//
+// Copyright 2008-2009 by Wilson Snyder.  This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+//
+// Verilator is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+//*************************************************************************
+// V3ClkGater's Transformations:
+//
+//   Look for clock gaters
+//   Note there's overlap between this process and V3Split's
+//	ALWAYS: Build graph
+// 	    IF: Form vertex pointing to any IFs or ALWAYS above
+//	    VARREF: Form vertex pointing to IFs it is under
+//	    ASSIGN: If under normal assignment, disable optimization
+//          FUTURE OPTIMIZE: If signal is set to itself, consider that OK for gating.
+// 	    !splitable: Mark all VARREFs in this statement as comming from it
+//	Optimize graph so if signal is referenced under multiple IF branches it moves up
+//	Make ALWAYS for each new gating term, and move statements there
+//*************************************************************************
+
+#include "config_build.h"
+#include "verilatedos.h"
+#include <cstdio>
+#include <cstdarg>
+#include <unistd.h>
+#include <map>
+#include <algorithm>
+#include <vector>
+
+#include "V3Global.h"
+#include "V3Ast.h"
+#include "V3Stats.h"
+#include "V3Graph.h"
+#include "V3ClkGater.h"
+
+//######################################################################
+// Base for debug
+
+class GaterBaseVisitor : public AstNVisitor {
+protected:
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+};
+
+//######################################################################
+// Support classes
+
+class GaterVarVertex;
+
+class GaterVertex : public V3GraphVertex {
+    static uint32_t s_rankNum;
+public:
+    GaterVertex(V3Graph* graphp)
+	: V3GraphVertex(graphp) {
+	s_rankNum++; rank(s_rankNum);
+    }
+    virtual ~GaterVertex() {}
+    virtual int typeNum() const = 0;
+    static void clearRank() { s_rankNum=0; }
+    virtual int sortCmp(const V3GraphVertex* rhsp) const;
+};
+uint32_t GaterVertex::s_rankNum = 0;
+
+class GaterHeadVertex : public GaterVertex {
+public:
+    GaterHeadVertex(V3Graph* graphp)
+	: GaterVertex(graphp) {}
+    virtual ~GaterHeadVertex() {}
+    virtual int typeNum() const { return __LINE__; }  // C++ typeof() equivelent
+    virtual string name() const { return "*HEAD*"; }
+    virtual string dotColor() const { return "green"; }
+};
+
+class GaterPliVertex : public GaterVertex {
+public:
+    GaterPliVertex(V3Graph* graphp)
+	: GaterVertex(graphp) {}
+    virtual ~GaterPliVertex() {}
+    virtual int typeNum() const { return __LINE__; }  // C++ typeof() equivelent
+    virtual string name() const { return "*PLI*"; }
+    virtual string dotColor() const { return "red"; }
+};
+
+class GaterIfVertex : public GaterVertex {
+    AstNodeIf*	m_nodep;
+public:
+    AstNodeIf* nodep() const { return m_nodep; }
+    GaterIfVertex(V3Graph* graphp, AstNodeIf* nodep)
+	: GaterVertex(graphp), m_nodep(nodep) { }
+    virtual ~GaterIfVertex() {}
+    virtual int typeNum() const { return __LINE__; }  // C++ typeof() equivelent
+    virtual string name() const { return cvtToStr((void*)m_nodep)+" {"+cvtToStr(m_nodep->fileline()->lineno())+"}"; }
+};
+
+class GaterVarVertex : public GaterVertex {
+    AstVarScope*	m_nodep;
+public:
+    AstVarScope* nodep() const { return m_nodep; }
+    GaterVarVertex(V3Graph* graphp, AstVarScope* nodep)
+	: GaterVertex(graphp), m_nodep(nodep) { }
+    virtual ~GaterVarVertex() {}
+    virtual int typeNum() const { return __LINE__; }  // C++ typeof() equivelent
+    virtual string name() const { return nodep()->name(); }
+    virtual string dotColor() const { return "skyblue"; }
+};
+
+//######################################################################
+// Edge types
+
+class GaterEdge : public V3GraphEdge {
+    uint32_t	m_ifelse;	// True branch of if
+public:
+    // These are used as shift amounts into node's user()
+#define VU_DEFINE  enum VarUsage { VU_NONE=0, VU_IF=1, VU_ELSE=2, VU_PLI=4, VU_MADE=8}
+    VU_DEFINE;
+
+    uint32_t ifelse() const { return m_ifelse; }
+    bool ifelseTrue()  const { return m_ifelse & VU_IF; }
+    bool ifelseFalse() const { return m_ifelse & VU_ELSE; }
+    bool ifelseBoth() const { return ifelseTrue() && ifelseFalse(); }
+    GaterEdge(V3Graph* graphp, V3GraphVertex* fromp, V3GraphVertex* top, uint32_t ifelse)
+	: V3GraphEdge(graphp, fromp, top, 10, false), m_ifelse(ifelse) {}
+    virtual ~GaterEdge() {}
+    virtual string dotColor() const { return ((ifelse() & VU_PLI) ? "red"
+					      : (ifelseBoth() ? "blue"
+						 : (ifelseTrue() ? "green"
+						    : "darkgreen"))); }
+    virtual int sortCmp(const V3GraphEdge* rEdgep) const {
+	// Our master sort sorts by edges first, so we don't want to
+	// consider the upstream vertex::sortCmp when sorting by edges.
+	// We do want to order by something though; rank works
+	if (fromp()->rank() < rEdgep->fromp()->rank()) return -1;
+	if (fromp()->rank() > rEdgep->fromp()->rank()) return 1;
+	// If same, resolve by ifelse
+	const GaterEdge* crEdgep = static_cast<const GaterEdge*>(rEdgep);
+	if (m_ifelse < crEdgep->m_ifelse) return -1;
+	if (m_ifelse > crEdgep->m_ifelse) return 1;
+	return 0;
+    }
+};
+
+int GaterVertex::sortCmp(const V3GraphVertex* rhsp) const {
+    const GaterVertex* crhsp = static_cast<const GaterVertex*>(rhsp);
+    // We really only care about ordering Var's together, but...
+    // First put same type together
+    if (typeNum() < crhsp->typeNum()) return -1;
+    if (typeNum() > crhsp->typeNum()) return 1;
+    // If variable, group by same input fanin
+    // (know they're the same type based on above compare)
+    if (dynamic_cast<const GaterVarVertex*>(this)) {
+	// We've already sorted by edges, so just see if same tree
+	// If this gets too slow, we could compute a hash up front
+	V3GraphEdge* lEdgep = this->inBeginp();
+	V3GraphEdge* rEdgep = rhsp->inBeginp();
+	while (lEdgep && rEdgep) {
+	    const GaterEdge* clEdgep = static_cast<const GaterEdge*>(lEdgep);
+	    const GaterEdge* crEdgep = static_cast<const GaterEdge*>(rEdgep);
+	    if (lEdgep->fromp()->rank() < rEdgep->fromp()->rank()) return -1;
+	    if (lEdgep->fromp()->rank() > rEdgep->fromp()->rank()) return 1;
+	    if (clEdgep->ifelse() < crEdgep->ifelse()) return -1;
+	    if (clEdgep->ifelse() > crEdgep->ifelse()) return 1;
+	    lEdgep = lEdgep->inNextp();
+	    rEdgep = rEdgep->inNextp();
+	}
+	if (!lEdgep && !rEdgep) return 0;
+	return lEdgep ? -1 : 1;
+    }
+    // Finally by rank of this vertex
+    if (rank() < rhsp->rank()) return -1;
+    if (rank() > rhsp->rank()) return 1;
+    return 0;
+}
+
+//######################################################################
+// Check for non-simple gating equations
+
+class GaterCondVisitor : public GaterBaseVisitor {
+private:
+    // RETURN STATE
+    bool		m_isSimple;	// Set false when we know it isn't simple
+    // METHODS
+    inline void okIterate(AstNode* nodep) {
+	if (m_isSimple) nodep->iterateChildren(*this);
+    }
+    // VISITORS
+    virtual void visit(AstOr* nodep, AstNUser*) {	okIterate(nodep); }
+    virtual void visit(AstAnd* nodep, AstNUser*) {	okIterate(nodep); }
+    virtual void visit(AstNot* nodep, AstNUser*) {	okIterate(nodep); }
+    virtual void visit(AstLogOr* nodep, AstNUser*) {	okIterate(nodep); }
+    virtual void visit(AstLogAnd* nodep, AstNUser*) {	okIterate(nodep); }
+    virtual void visit(AstLogNot* nodep, AstNUser*) {	okIterate(nodep); }
+    virtual void visit(AstVarRef* nodep, AstNUser*) {	okIterate(nodep); }
+
+    // Other possibilities are equals, etc
+    // But, we don't want to get too complicated or it will take too much
+    // effort to calculate the gater
+
+    virtual void visit(AstNode* nodep, AstNUser*) {
+	m_isSimple = false;
+	//nodep->iterateChildren(*this);
+    }
+public:
+    // CONSTUCTORS
+    GaterCondVisitor(AstNode* nodep) {
+	m_isSimple = true;
+	nodep->accept(*this);
+    }
+    virtual ~GaterCondVisitor() {}
+    // PUBLIC METHODS
+    bool isSimple() const { return m_isSimple; }
+};
+
+//######################################################################
+// Check for non-simple gating equations
+
+class GaterBodyVisitor : public GaterBaseVisitor {
+    // NODE STATE
+    // Input state
+    //  AstVarScope::user2p()	-> AstAlways* moving this variable to
+
+    enum State {
+	// This is used as a bitmask
+	STATE_UNKNOWN=0,
+	STATE_KEEP=1,	// Seen a variable we need, keep this statement
+	STATE_DELETE=2	// Seen a variable we need, delete this statement
+	// 3=keep & delete
+    };
+
+    bool	m_original;	// Deleting original statements, vs deleting new var statements
+    AstNode*	m_exprp;	// New gater expression we are building
+    bool	m_cloning;	// Clone this object 0=not sure yet, 1=do
+    uint32_t	m_state;	// Parsing state
+
+    // VISITORS
+    virtual void visit(AstVarRef* nodep, AstNUser*) {
+	if (nodep->lvalue()) {
+	    AstVarScope* vscp = nodep->varScopep();
+	    if (vscp->user2p()->castNode() == m_exprp) {
+		// This variable's block needs to move to the new always
+		if (m_original) {
+		    UINFO(9,"  VARREF delete in old: "<<nodep<<endl);
+		    m_state |= STATE_DELETE;
+		} else {
+		    UINFO(9,"  VARREF stays in new:  "<<nodep<<endl);
+		    m_state |= STATE_KEEP;
+		}
+	    } else {
+		if (m_original) {
+		    UINFO(9,"  VARREF other stays in old\n");
+		    m_state |= STATE_KEEP;
+		} else {
+		    UINFO(9,"  VARREF other delete in new\n");
+		    m_state |= STATE_DELETE;
+		}
+	    }
+	}
+    }
+
+    //virtual void visit(AstNodeIf* nodep, AstNUser*) { ... }
+    // Not needed, it's the same handling as any other statement.  Cool, huh?
+    // (We may get empty IFs but the constant propagater will rip them up for us)
+
+    virtual void visit(AstNodeStmt* nodep, AstNUser*) {
+	uint32_t oldstate = m_state;
+	// Find if children want to delete this or not.
+	// Note children may bicker, and want to both keep and delete (branches on a if)
+	uint32_t childstate;
+	{
+	    m_state = STATE_UNKNOWN;
+	    nodep->iterateChildren(*this);
+	    childstate = m_state;
+	}
+	m_state = oldstate;
+	UINFO(9,"    Did state="<<childstate<<"  "<<nodep<<endl);
+
+	// Indeterminate (statement with no lvalue), so keep only in original
+	if (childstate == STATE_UNKNOWN) {
+	    if (m_original) childstate |= STATE_KEEP;
+	    else childstate |= STATE_DELETE;
+	}
+
+	if ((childstate & STATE_DELETE) && !(childstate & STATE_KEEP)) {
+	    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
+	    // Pass upwards we did delete
+	    m_state |= STATE_DELETE;
+	} else {
+	    // Pass upwards we must keep
+	    m_state |= STATE_KEEP;
+	}
+    }
+    virtual void visit(AstNode* nodep, AstNUser*) {
+	nodep->iterateChildren(*this);
+    }
+public:
+    // CONSTUCTORS
+    GaterBodyVisitor(AstAlways* nodep, AstNode* exprp, bool original) {
+	m_exprp = exprp;
+	m_original = original;
+	m_state = STATE_UNKNOWN;
+	if (debug()>=9) nodep->dumpTree(cout,"  GateBodyIn:  ");
+	nodep->bodysp()->iterateAndNext(*this);
+	if (debug()>=9) nodep->dumpTree(cout,"  GateBodyOut: ");
+	// If there's no statements we shouldn't have had a resulting graph
+	// vertex asking for this creation
+    }
+    virtual ~GaterBodyVisitor() {}
+};
+
+//######################################################################
+// Create clock gaters
+
+class GaterVisitor : public GaterBaseVisitor {
+    // NODE STATE
+    // Cleared on Always
+    //  AstVarScope::user1p()	-> GaterVarVertex*
+    //  AstAlways::user4()	-> bool.  True indicates processed
+    // Cleared on each new Always
+    //  AstVarScope::user2p()	-> AstAlways* moving this variable to
+    AstUser1InUse	m_inuser1;
+    AstUser2InUse	m_inuser2;
+    AstUser4InUse	m_inuser4;
+
+    // GRAPH STATE
+    // Cleared on simplify
+    //  Vertex::user()		-> VarUsage: Mark of which if/else edges are hit
+
+    // TYPES
+    VU_DEFINE;
+
+    enum MiscConsts {
+	IF_DEPTH_MAX = 4,	// IFs deep we bother to analyze
+	DOMAINS_MAX = 32	// Clock domains before avoiding O(N^2) blowup
+    };
+
+    // MEMBERS
+    string	m_nonopt;		// Reason block is not optimizable
+    V3Double0	m_statGaters;		// Statistic tracking
+    V3Double0	m_statBits;		// Statistic tracking
+    bool	m_directlyUnderAlw;	// Immediately under Always or If
+    int		m_ifDepth;		// Depth of IF statements
+    int		m_numIfs;		// Number of IF statements
+    V3Graph	m_graph;		// Scoreboard of var usages/dependencies
+    GaterPliVertex*	m_pliVertexp;	// Element specifying PLI ordering
+    GaterHeadVertex*	m_headVertexp;	// Top vertex
+    V3GraphVertex*	m_aboveVertexp;	// Vertex above this point in tree
+    uint32_t		m_aboveTrue;	// Vertex above this point is true branch
+    AstVarScope*	m_stmtVscp;	// Current statement had variable assigned
+    bool		m_stmtInPli;	// Current statement has PLI
+
+    // METHODS
+    void nonOptimizable(AstNode* nodep, const char* reasonp) {
+	if (m_nonopt=="") {
+	    UINFO(9,"    Nonopt: "<<reasonp<<": "<<nodep<<endl);
+	    m_nonopt = reasonp;
+	}
+    }
+    void scoreboardPli(AstNode* nodep) {
+	// Order all PLI statements with other PLI statements
+	// This insures $display's and such remain in proper order
+	// We don't prevent splitting out other non-pli statements, however,
+	// because it is common to have $uasserts sprinkled about.
+	if (!m_pliVertexp) {
+	    m_pliVertexp = new GaterPliVertex(&m_graph);
+	}
+	if (m_stmtVscp) {  // Already saw a variable, be sure to mark it!
+	    GaterVarVertex* varVtxp = (GaterVarVertex*)(m_stmtVscp->user1p());
+	    new GaterEdge(&m_graph, m_pliVertexp, varVtxp, VU_PLI);
+	}
+	m_stmtInPli = true;  // Mark all followon variables too
+    }
+
+    // METHODS -- GRAPH stuff
+    void simplifyGraph() {
+	if (debug()>=9) m_graph.dumpDotFilePrefixed("gater_init", false);
+
+	// We now have all PLI variables with edges FROM the pli vertex
+	simplifyPli();
+	if (debug()>=9) m_graph.dumpDotFilePrefixed("gater_pli", false);
+
+	// Any vertex that points along both true & false path to variable
+	// can be simplfied so parent points to that vertex.  Any vertex
+	// that points to a (great...) grandparent of a variable can just
+	// point to the edge.
+	m_graph.userClearVertices();	// user() will contain VarUsage
+	simplifyIfElseRecurse(m_headVertexp);
+	if (debug()>=9) m_graph.dumpDotFilePrefixed("gater_ifelse", false);
+
+	m_graph.userClearVertices();	// user() will contain VarUsage
+	simplifyGrandRecurse(m_headVertexp, 1);
+	if (debug()>=9) m_graph.dumpDotFilePrefixed("gater_grand", false);
+
+	simplifyRemoveUngated(m_headVertexp);
+
+	// Give all signals with same gating term same color
+	graphColorSameFeeder();
+
+	if (debug()>=9) m_graph.dumpDotFilePrefixed("gater_done", false);
+    }
+
+    void simplifyPli() {
+	// For now, we'll not gate any logic with PLI lvariables in it.  In
+	// the future we may move PLI statements.  One way to do so is to
+	// all below pli VARs to go IfVertex -> PliVertex -> VarVertex then
+	// they all must get colored the same. There may be a lot of
+	// duplicated edges to the PLI; they'll need cleanup.  All of the
+	// later optimizations need to deal, and the GaterBodyVisitor needs
+	// to know how to move them.
+	if (m_pliVertexp) {
+	    // Follow PLI out edges to find all relevant variables
+	    for (V3GraphEdge* nextp,* edgep = m_pliVertexp->outBeginp(); edgep; edgep = nextp) {
+		nextp = edgep->outNextp();  // We may edit the list
+		if (GaterVarVertex* vVxp = dynamic_cast<GaterVarVertex*>(edgep->top())) {
+		    vVxp->unlinkDelete(&m_graph); vVxp=NULL; edgep=NULL;
+		} else {
+		    m_graph.dump();
+		    v3fatalSrc("PLI vertex points to non-signal");
+		}
+	    }
+	    m_pliVertexp->unlinkDelete(&m_graph); m_pliVertexp = NULL;
+	}
+    }
+
+    void simplifyIfElseRecurse(V3GraphVertex* vertexp) {
+	// From bottom-up, propagate duplicate IF/ELSE branches to grandparent
+	for (V3GraphEdge* edgep = vertexp->outBeginp(); edgep; edgep=edgep->outNextp()) {
+	    simplifyIfElseRecurse(edgep->top());
+	}
+	//UINFO(9,"IERecurse "<<vertexp<<endl);
+	if (dynamic_cast<GaterIfVertex*>(vertexp)) {
+	    // Clear indications
+	    for (V3GraphEdge* edgep = vertexp->outBeginp(); edgep; edgep=edgep->outNextp()) {
+		edgep->top()->user(VU_NONE);
+	    }
+	    // Mark nodes on to/from side
+	    for (V3GraphEdge* edgep = vertexp->outBeginp(); edgep; edgep=edgep->outNextp()) {
+		V3GraphVertex* toVxp = edgep->top();
+		GaterEdge* cedgep = static_cast<GaterEdge*>(edgep);
+		// We may mark this twice in one pass - if so it's duplicated; no worries
+		if (cedgep->ifelseTrue()) toVxp->user(toVxp->user() | VU_IF);
+		if (cedgep->ifelseFalse()) toVxp->user(toVxp->user() | VU_ELSE);
+		//UINFO(9,"  mark "<<edgep<<" "<<toVxp<<endl);
+	    }
+	    // Any with both IF & ELSE mark get removal mark, and new parent edge
+	    for (V3GraphEdge* nextp,* edgep = vertexp->outBeginp(); edgep; edgep = nextp) {
+		nextp = edgep->outNextp();  // We may edit the list
+		V3GraphVertex* toVxp = edgep->top();
+		//UINFO(9," to "<<toVxp->user()<<" "<<toVxp<<endl);
+		if ((toVxp->user() & VU_IF) && (toVxp->user() & VU_ELSE)) {
+		    edgep->unlinkDelete(); edgep = NULL;
+		    if (!(toVxp->user() & VU_MADE)) {   // Make an edge only once
+			toVxp->user(toVxp->user() | VU_MADE);
+			GaterEdge* inedgep = static_cast<GaterEdge*>(vertexp->inBeginp());
+			V3GraphVertex* grandparent = inedgep->fromp();
+			new GaterEdge(&m_graph, grandparent, toVxp, inedgep->ifelse());
+		    }
+		}
+	    }
+	}
+    }
+
+    void simplifyGrandRecurse(V3GraphVertex* vertexp, uint32_t depth) {
+	// From top-down delete any vars that grandparents source
+	// IE    A -> B -> C -> VAR
+	//         \----------^
+	//UINFO(9,"GRecurse "<<depth<<" "<<vertexp<<endl);
+	// Mark all variables to be swept
+	for (V3GraphEdge *nextp, *edgep = vertexp->outBeginp(); edgep; edgep=nextp) {
+	    nextp = edgep->outNextp();  // We may edit the list
+	    if (GaterVarVertex* toVxp = dynamic_cast<GaterVarVertex*>(edgep->top())) {
+		if (toVxp->user() && toVxp->user() < depth) {
+		    // A recursion "above" us marked it,
+		    // Remove this edge, it's redundant with the upper edge
+		    edgep->unlinkDelete(); edgep=NULL;
+		} else {
+		    GaterEdge* cedgep = static_cast<GaterEdge*>(edgep);
+		    if (cedgep->ifelseBoth()) {
+			toVxp->user(depth);
+		    }
+		}
+	    }
+	}
+	// Recurse
+	for (V3GraphEdge* edgep = vertexp->outBeginp(); edgep; edgep=edgep->outNextp()) {
+	    simplifyGrandRecurse(edgep->top(), depth+1);
+	}
+	// Clean our marks
+	for (V3GraphEdge* edgep = vertexp->outBeginp(); edgep; edgep=edgep->outNextp()) {
+	    V3GraphVertex* toVxp = edgep->top();
+	    if (toVxp->user() && toVxp->user() < depth) {  // A recursion "above" us marked it; don't mess with it
+	    } else {
+		toVxp->user(0);  // We marked it originally, so unmark now
+	    }
+	}
+	// Delete any If nodes with no children
+	// Last, as want bottom-up cleanup
+	for (V3GraphEdge *nextp, *edgep = vertexp->outBeginp(); edgep; edgep=nextp) {
+	    nextp = edgep->outNextp();  // We may edit the list
+	    if (GaterIfVertex* toVxp = dynamic_cast<GaterIfVertex*>(edgep->top())) {
+		if (!toVxp->outBeginp()) {
+		    if (!nextp || nextp->top() != edgep->top()) {  // Else next would disappear; we'll do it next loop
+			toVxp->unlinkDelete(&m_graph); toVxp=NULL; edgep=NULL;
+		    }
+		}
+	    }
+	}
+    }
+
+    void simplifyRemoveUngated(V3GraphVertex* vertexp) {
+	// Remove variables that are ungated
+	// At this point, any variable under the head is ungated
+	for (V3GraphEdge *nextp, *edgep = vertexp->outBeginp(); edgep; edgep=nextp) {
+	    nextp = edgep->outNextp();  // We may edit the list
+	    if (GaterVarVertex* toVxp = dynamic_cast<GaterVarVertex*>(edgep->top())) {
+		if (!nextp || nextp->top() != edgep->top()) {  // Else next would disappear; we'll do it next loop
+		    toVxp->unlinkDelete(&m_graph); toVxp=NULL; edgep=NULL;
+		}
+	    }
+	}
+    }
+
+    void graphColorSameFeeder() {
+	// Assign same color to all destination vertices that have same
+	// subgraph feeding into them
+	// (I.E. all "from" nodes are common within each color)
+	// We could hash, but instead it's faster to sort edges, so we know
+	// the same edge list is always adjacent.  The result is a
+	// O(vertices*edges) loop, but we'd need that to hash too.
+	if (debug()>9) { cout<<"PreColor:\n"; m_graph.dump(); }
+
+	m_graph.sortEdges();
+
+	// Now sort vertices, so same inbound edge set ends up adjacent
+	m_graph.sortVertices();
+
+	// Now walk and assign colors; same color is adjacent
+	m_graph.clearColors();
+	m_graph.userClearEdges(); // Used by newExprFromGraph
+	uint32_t color = 1;
+	GaterVarVertex* lastVxp	= NULL;
+	for (V3GraphVertex* vertexp = m_graph.verticesBeginp(); vertexp; vertexp=vertexp->verticesNextp()) {
+	    if (GaterVarVertex* vVxp = dynamic_cast<GaterVarVertex*>(vertexp)) {
+		if (!vVxp->inBeginp()) {
+		    // At this point, any variable not linked is an error
+		    // (It should have at least landed under the Head node)
+		    vVxp->nodep()->v3fatalSrc("Variable became stranded in clk gate detection\n");
+		}
+		if (!lastVxp || vVxp->sortCmp(lastVxp)) {
+		    // Different sources for this new node
+		    color++;
+		}
+		vVxp->color(color);
+		lastVxp = vVxp;
+	    }
+	}
+
+	if (debug()>9) { cout<<"PostColor:\n"; m_graph.dump(); }
+    }
+
+    AstNode* newExprFromGraph(GaterVarVertex* vertexp) {
+	// Recurse backwards, then form equation on return path
+	// We could use user()!=0, but zeroing it is slow, so instead we'll mark with a generation
+	// We get equations like "a | (!a & b)" which obviously could be reduced here,
+	// instead out of generality, there's a V3Const::matchOrAndNot that'll clean it up
+	static uint32_t s_generation = 0;
+	++s_generation;
+	nafgMarkRecurse(vertexp, s_generation);
+	AstNode* nodep = nafgCreateRecurse(m_headVertexp, s_generation);
+	if (debug()>=9) nodep->dumpTree(cout,"  GateExpr: ");
+	return nodep;
+    }
+    void nafgMarkRecurse(V3GraphVertex* vertexp, uint32_t generation) {
+	// Backwards mark user() on the path we recurse
+	//UINFO(9," nafgMark: v "<<(void*)(vertexp)<<" "<<vertexp->name()<<endl);
+	for (V3GraphEdge* edgep = vertexp->inBeginp(); edgep; edgep = edgep->inNextp()) {
+	    //UINFO(9," nafgMark: "<<(void*)(edgep)<<" "<<edgep->name()<<endl);
+	    edgep->user(generation);
+	    nafgMarkRecurse(edgep->fromp(), generation);
+	}
+    }
+    AstNode* nafgCreateRecurse(V3GraphVertex* vertexp, uint32_t generation) {
+	// Forewards follow user() marked previously and build tree
+	AstNode* nodep = NULL;
+	// OR across all edges found at this level
+	//UINFO(9," nafgEnter: v "<<(void*)(vertexp)<<" "<<vertexp->name()<<endl);
+	for (V3GraphEdge* edgep = vertexp->outBeginp(); edgep; edgep = edgep->outNextp()) {
+	    if (edgep->user() == generation) {
+		GaterEdge* cedgep = static_cast<GaterEdge*>(edgep);
+		AstNode* eqnp = NULL;
+		//UINFO(9," nafgFollow: "<<(void*)(edgep)<<" "<<edgep->name()<<endl);
+		if (dynamic_cast<GaterHeadVertex*>(edgep->fromp())) {
+		    // Just OR in all lower terms
+		    eqnp = nafgCreateRecurse(edgep->top(), generation);
+		} else if (GaterIfVertex* cVxp = dynamic_cast<GaterIfVertex*>(edgep->fromp())) {
+		    // Edges from IFs represent a real IF branch in the equation tree
+		    //UINFO(9,"  ifver "<<(void*)(edgep)<<" cc"<<edgep->dotColor()<<endl);
+		    eqnp = cVxp->nodep()->condp()->cloneTree(true);
+		    if (eqnp && cedgep->ifelseFalse()) {
+			eqnp = new AstNot(eqnp->fileline(),eqnp);
+		    }
+		    // We need to AND this term onto whatever was found below it
+		    AstNode* belowp = nafgCreateRecurse(edgep->top(), generation);
+		    if (belowp) eqnp = new AstAnd(eqnp->fileline(),eqnp,belowp);
+		}
+		// Top level we could choose to make multiple gaters, or ORs under the gater
+		// Right now we'll put OR lower down and let other optimizations deal
+		if (nodep) nodep = new AstOr(eqnp->fileline(),nodep,eqnp);
+		else nodep = eqnp;
+		//if (debug()>=9) nodep->dumpTree(cout,"      followExpr: ");
+	    }
+	}
+	//UINFO(9," nafgExit:  "<<(void*)(vertexp)<<" "<<vertexp->name()<<endl);
+	return nodep;
+    }
+
+    void newAlwaysTrees(AstAlways* nodep) {
+	// Across all variables we're moving
+	uint32_t lastColor = 0;
+	AstNode* lastExprp = NULL;
+	for (V3GraphVertex* vertexp = m_graph.verticesBeginp(); vertexp; vertexp=vertexp->verticesNextp()) {
+	    if (GaterVarVertex* vVxp = dynamic_cast<GaterVarVertex*>(vertexp)) {
+		if (!lastExprp || lastColor != vVxp->color()) {
+		    lastColor = vVxp->color();
+		    // Create the block we've just finished
+		    if (lastExprp) newAlwaysTree(nodep, lastExprp); // Duplicate below
+		    // New expression for this color
+		    lastExprp = newExprFromGraph(vVxp);
+		}
+		// Mark variable to move
+		if (vVxp->nodep()->user2p()) vVxp->nodep()->v3fatalSrc("One variable got marked under two gaters");
+		vVxp->nodep()->user2p(lastExprp);
+		m_statBits += vVxp->nodep()->width();  // Moving a wide bus counts more!
+		// There shouldn't be two possibilities we want to
+		// move to, IE {A,B} <= Z because we marked such
+		// things as unoptimizable
+	    }
+	}
+	// Create the final block we've just finished
+	if (lastExprp) newAlwaysTree(nodep, lastExprp);   // Duplicate above
+    }
+
+    void newAlwaysTree(AstAlways* nodep, AstNode* exprp) {
+	// Create new always with specified gating expression
+	// Relevant vars are already marked with user2p
+
+	// Should we put the gater under the always itself,
+	// or make a new signal?
+	//   New signal: May cause replicated logic until we can combine
+	//		Need way to toggle signal on complicated pos/negedge
+	//   Under Always: More complicated, may not propagate logic with gateer
+	//	Untill we get better gate optimization, we'll go this route.
+//#define GATER_NOP
+#ifdef GATER_NOP
+	// For testing only, don't clock gate but still make new always
+	AstSenTree* sensesp = nodep->sensesp()->cloneTree(true);
+#else
+	// Make a SenGate
+	AstSenItem* oldsenitemsp = nodep->sensesp()->sensesp()->castSenItem();
+	if (!oldsenitemsp) nodep->v3fatalSrc("SenTree doesn't have any SenItem under it");
+
+	AstSenTree* sensesp = new AstSenTree(nodep->fileline(),
+					     new AstSenGate(nodep->fileline(),
+							    oldsenitemsp->cloneTree(true),
+							    exprp));
+#endif
+
+	// Make new body; note clone will preserve user2p() indicating moving vars
+	AstNode* bodyp = nodep->bodysp()->cloneTree(true);
+
+	AstAlways* alwp = new AstAlways(nodep->fileline(),
+					sensesp,
+					bodyp);
+
+	alwp->user4(1);  // No need to process the new always again!
+	nodep->addNextHere(alwp);
+
+	// Blow moved statements from old body
+	GaterBodyVisitor(nodep,exprp,true);
+	// Blow old statements from new body
+	GaterBodyVisitor(alwp,exprp,false);
+
+	m_statGaters++;
+	if (debug()>=9) alwp->dumpTree(cout,"  new: ");
+    }
+
+    // VISITORS
+    virtual void visit(AstAlways* nodep, AstNUser*) {
+	if (debug()>=9) cout<<endl<<endl<<endl;
+	UINFO(5, "Gater: ALWAYS: "<<nodep<<endl);
+	if (nodep->user4()) return;
+	nodep->user4(1);
+
+	clear();
+
+	if (debug()>=9) nodep->dumpTree(cout,"  Alwin:  ");
+
+	// Look for constructs we can't optimize
+	// Form graph with Vertices at each IF, and each Variable
+	m_aboveTrue = VU_IF | VU_ELSE;
+	iterateChildrenAlw(nodep, true);
+
+	// Other reasons to not optimize
+	if (!m_numIfs) nonOptimizable(nodep, "No if statements");
+
+	// Something to optimize, oh my!
+	if (m_nonopt!="") {
+	    UINFO(5, "  Gater non-opt: "<<m_nonopt<<endl);
+	} else {
+	    // Process it
+	    simplifyGraph();
+
+	    // See how much moves
+	    uint32_t lastColor = 0;
+	    for (V3GraphVertex* vertexp = m_graph.verticesBeginp(); vertexp; vertexp=vertexp->verticesNextp()) {
+		if (GaterVarVertex* vVxp = dynamic_cast<GaterVarVertex*>(vertexp)) {
+		    if (lastColor < vVxp->color()) {
+			lastColor = vVxp->color();
+		    }
+		}
+	    }
+	    if (lastColor == 0) { // Nothing we moved!
+		nonOptimizable(nodep, "Nothing moved");
+	    }
+	    else if (lastColor > DOMAINS_MAX) {
+		// Our move algorithm is fairly slow and if we're splitting
+		// up too much it'll get really nasty.  It's probably a bad
+		// move for performance to split too much, anyhow, as the
+		// number of gaters will result in calling many small c functions.
+		nonOptimizable(nodep, "Too much moved");
+	    }
+	    if (m_nonopt=="") {
+		newAlwaysTrees(nodep);
+		if (debug()>=9) nodep->dumpTree(cout,"  Gaterout: ");
+	    }
+	}
+	UINFO(5, "  Gater done"<<endl);
+    }
+    virtual void visit(AstVarRef* nodep, AstNUser*) {
+	if (nodep->lvalue()) {
+	    AstVarScope* vscp = nodep->varScopep();
+	    if (nodep->varp()->isSigPublic()) {
+		// Public signals shouldn't be changed, pli code might be messing with them
+		scoreboardPli(nodep);
+	    }
+	    // If another lvalue in this node, give up optimizing.
+	    // We could just not optimize this variable, but we've already marked the
+	    // other variable as optimizable, so we can instead pretend it's a PLI node.
+	    if (m_stmtVscp) {
+		UINFO(5, "   Multiple lvalues in one statement: "<<nodep<<endl);
+		scoreboardPli(nodep);  // This will set m_stmtInPli
+	    }
+	    m_stmtVscp = vscp;
+	    // Find, or make new Vertex
+	    GaterVarVertex* vertexp = (GaterVarVertex*)(vscp->user1p());
+	    if (!vertexp) {
+		vertexp = new GaterVarVertex(&m_graph, vscp);
+		vscp->user1p(vertexp);
+	    }
+	    new GaterEdge(&m_graph, m_aboveVertexp, vertexp, m_aboveTrue);
+	    if (m_stmtInPli) {
+		new GaterEdge(&m_graph, m_pliVertexp, vertexp, VU_PLI);
+	    }
+	}
+    }
+    virtual void visit(AstNodeIf* nodep, AstNUser*) {
+	m_ifDepth++;
+	bool allowGater = m_directlyUnderAlw && m_ifDepth <= IF_DEPTH_MAX;
+	if (allowGater) {
+	    GaterCondVisitor condVisitor(nodep->condp());
+	    if (!condVisitor.isSimple()) {
+		// Don't clear optimization, simply drop this IF as part of the gating
+		UINFO(5,"   IFnon-simple-condition: "<<nodep<<endl);
+		allowGater = false;
+	    }
+	}
+	if (!allowGater) {
+	    // IF burried under something complicated
+	    iterateChildrenAlw(nodep, true);
+	} else {
+	    UINFO(5, "  IF: "<<nodep<<endl);
+	    m_numIfs++;
+	    // Recurse to next level of if.
+	    V3GraphVertex*	lastabovep = m_aboveVertexp;
+	    uint32_t		lasttrue = m_aboveTrue;
+	    GaterIfVertex* vertexp = new GaterIfVertex(&m_graph, nodep);
+	    new GaterEdge(&m_graph, m_aboveVertexp, vertexp, m_aboveTrue);
+	    {
+		nodep->condp()->iterateAndNext(*this);  // directlyUnder stays as-is
+	    }
+	    {
+		m_aboveVertexp = vertexp;  // Vars will point at this edge
+		m_aboveTrue = VU_IF;
+		nodep->ifsp()->iterateAndNext(*this);  // directlyUnder stays as-is (true)
+	    }
+	    {
+		m_aboveVertexp = vertexp;  // Vars will point at this edge
+		m_aboveTrue = VU_ELSE;
+		nodep->elsesp()->iterateAndNext(*this);  // directlyUnder stays as-is (true)
+	    }
+	    m_aboveVertexp = lastabovep;
+	    m_aboveTrue = lasttrue;
+	}
+	m_ifDepth--;
+    }
+
+    virtual void visit(AstAssignDly* nodep, AstNUser*) {
+	// iterateChildrenAlw will detect this is a statement for us
+	iterateChildrenAlw(nodep, false);
+    }
+
+    virtual void visit(AstNodeAssign* nodep, AstNUser*) {
+	// Note NOT AssignDly; handled above, We'll just mark this block as
+	// not optimizable.
+	//
+	// A future alternative is to look for any lvalues that are also
+	// variables in the sensitivity list, or rvalues in this block.  If
+	// any hit, disable optimization.  Unlikely to be useful (For loops
+	// being an exception, but they're already unrolled.)
+	nonOptimizable(nodep, "Non-delayed assignment");
+	// No reason to iterate.
+    }
+
+    virtual void visit(AstSenItem* nodep, AstNUser*) {
+	if (!nodep->isClocked()) {
+	    nonOptimizable(nodep, "Non-clocked sensitivity");
+	}
+	iterateChildrenAlw(nodep, false);
+    }
+
+    //--------------------
+    virtual void visit(AstNode* nodep, AstNUser*) {
+	if (m_nonopt=="") {  // Else accelerate
+	    iterateChildrenAlw(nodep, false);
+	}
+    }
+    inline void iterateChildrenAlw(AstNode* nodep, bool under) {
+	// **** USE THIS INSTEAD OF iterateChildren!
+	// Note If visitor doesn't call here; does it its own way
+	bool lastdua = m_directlyUnderAlw;
+	AstVarScope* lastvscp = m_stmtVscp;
+	bool lastpli = m_stmtInPli;
+	m_directlyUnderAlw = under;
+	if (nodep->castNodeStmt()) {  // Restored below
+	    UINFO(9,"       Stmt: "<<nodep<<endl);
+	    m_stmtVscp = NULL;
+	    m_stmtInPli = false;
+	}
+	if (!nodep->isSplittable()) {
+	    // May also be a new statement (above if); if so we mark it immediately
+	    UINFO(9,"         NotSplittable "<<nodep<<endl);
+	    scoreboardPli(nodep);
+	}
+	{
+	    nodep->iterateChildren(*this);
+	}
+	m_directlyUnderAlw = lastdua;
+	if (nodep->castNodeStmt()) {  // Reset what set above; else propagate up to above statement
+	    m_stmtVscp = lastvscp;
+	    m_stmtInPli = lastpli;
+	}
+    }
+
+public:
+    // CONSTUCTORS
+    GaterVisitor(AstNode* nodep) {
+	// AstAlways visitor does the real work, so most zeroing needs to be in clear()
+	clear();
+	nodep->accept(*this);
+    }
+    void clear() {
+	m_nonopt = "";
+	m_directlyUnderAlw = false;
+	m_ifDepth = 0;
+	m_numIfs = 0;
+	AstNode::user1ClearTree();
+	AstNode::user2ClearTree();
+	// Prepare graph
+	m_graph.clear();
+	GaterVertex::clearRank();
+	m_pliVertexp = NULL;
+	m_headVertexp = new GaterHeadVertex(&m_graph);
+	m_aboveVertexp = m_headVertexp;
+	m_aboveTrue = false;
+	m_stmtVscp = NULL;
+	m_stmtInPli = false;
+    }
+    virtual ~GaterVisitor() {
+	V3Stats::addStat("Optimizations, Gaters inserted", m_statGaters);
+	V3Stats::addStat("Optimizations, Gaters impacted bits", m_statBits);
+    }
+};
+
+//######################################################################
+// Active class functions
+
+void V3ClkGater::clkGaterAll(AstNetlist* nodep) {
+    UINFO(2,__FUNCTION__<<": "<<endl);
+    // While the gater does well at some modules, it seems to slow down many others
+    UINFO(5,"ClkGater is disabled due to performance issues\n");
+    //GaterVisitor visitor (nodep);
+}

src/V3ClkGater.h

@@ -0,0 +1,37 @@
+// -*- C++ -*-
+//*************************************************************************
+// DESCRIPTION: Verilator: Break always into clock gated blocks
+//
+// Code available from: http://www.veripool.org/verilator
+//
+// AUTHORS: Wilson Snyder with Paul Wasson, Duane Gabli
+//
+//*************************************************************************
+//
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+//
+// Verilator is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+//*************************************************************************
+
+#ifndef _V3CLKGATER_H_
+#define _V3CLKGATER_H_ 1
+#include "config_build.h"
+#include "verilatedos.h"
+#include "V3Error.h"
+#include "V3Ast.h"
+
+//============================================================================
+
+class V3ClkGater {
+public:
+    static void clkGaterAll(AstNetlist* nodep);
+};
+
+#endif // Guard

src/V3Clock.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -50,8 +51,10 @@ class ClockVisitor : public AstNVisitor {
 private:
     // NODE STATE
     // Cleared each Module:
-    //  AstVarScope::userp()	-> AstVarScope*.  Temporary signal that was created.
+    //  AstVarScope::user1p()	-> AstVarScope*.  Temporary signal that was created.
     //  AstVarScope::user2p()	-> AstVarScope*.  Temporary signal for change detects
+    AstUser1InUse	m_inuser1;
+    AstUser2InUse	m_inuser2;
 
     // TYPES
     enum {  DOUBLE_OR_RATE = 10 };	// How many | per ||, Determined experimentally as best
@@ -69,20 +72,25 @@ private:
     AstSenTree*		m_lastSenp;	// Last sensitivity match, so we can detect duplicates.
     AstIf*		m_lastIfp;	// Last sensitivity if active to add more under
     int			m_stableNum;	// Number of each untilstable
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     AstVarScope* getCreateLastClk(AstVarScope* vscp) {
-	if (vscp->userp()) return ((AstVarScope*)vscp->userp());
+	if (vscp->user1p()) return ((AstVarScope*)vscp->user1p());
 	AstVar* varp = vscp->varp();
 	if (varp->width()!=1) varp->v3error("Unsupported: Clock edge on non-single bit signal: "<<varp->prettyName());
 	string newvarname = ((string)"__Vclklast__"+vscp->scopep()->nameDotless()+"__"+varp->shortName());
 	AstVar* newvarp
-	    = new AstVar (vscp->fileline(), AstVarType::MODULETEMP, newvarname); // No range; 1 bit.
+	    = new AstVar (vscp->fileline(), AstVarType::MODULETEMP, newvarname, NULL, NULL); // No range; 1 bit.
 	newvarp->width(1,1);
 	m_modp->addStmtp(newvarp);
 	AstVarScope* newvscp = new AstVarScope(vscp->fileline(), m_scopep, newvarp);
-	vscp->userp(newvscp);
+	vscp->user1p(newvscp);
 	m_scopep->addVarp(newvscp);
 	// At bottom, assign them
 	AstAssign* finalp
@@ -106,48 +114,66 @@ private:
 	m_scopep->addVarp(newvscp);
 	return newvscp;
     }
-    AstNode* createSenseEquation(AstSenTree* nodep) {
+    AstNode* createSenItemEquation(AstSenItem* nodep) {
+	// We know the var is clean, and one bit, so we use binary ops
+	// for speed instead of logical ops.
+	// POSEDGE:  var & ~var_last
+	// NEGEDGE:  ~var & var_last
+	// BOTHEDGE:  var ^ var_last
+	// HIGHEDGE:  var
+	// LOWEDGE:  ~var
+	AstNode* newp = NULL;
+	AstVarScope* clkvscp = nodep->varrefp()->varScopep();
+	if (nodep->edgeType()==AstEdgeType::POSEDGE) {
+	    AstVarScope* lastVscp = getCreateLastClk(clkvscp);
+	    newp = new AstAnd(nodep->fileline(),
+			      new AstVarRef(nodep->fileline(),
+					    nodep->varrefp()->varScopep(), false),
+			      new AstNot(nodep->fileline(),
+					 new AstVarRef(nodep->fileline(),
+						       lastVscp, false)));
+	} else if (nodep->edgeType()==AstEdgeType::NEGEDGE) {
+	    AstVarScope* lastVscp = getCreateLastClk(clkvscp);
+	    newp = new AstAnd(nodep->fileline(),
+			      new AstNot(nodep->fileline(),
+					 new AstVarRef(nodep->fileline(),
+						       nodep->varrefp()->varScopep(), false)),
+			      new AstVarRef(nodep->fileline(), lastVscp, false));
+	} else if (nodep->edgeType()==AstEdgeType::BOTHEDGE) {
+	    AstVarScope* lastVscp = getCreateLastClk(clkvscp);
+	    newp = new AstXor(nodep->fileline(),
+			      new AstVarRef(nodep->fileline(),
+					    nodep->varrefp()->varScopep(), false),
+			      new AstVarRef(nodep->fileline(), lastVscp, false));
+	} else if (nodep->edgeType()==AstEdgeType::HIGHEDGE) {
+	    newp = new AstVarRef(nodep->fileline(),
+				 clkvscp, false);
+	} else if (nodep->edgeType()==AstEdgeType::LOWEDGE) {
+	    newp = new AstNot(nodep->fileline(),
+			      new AstVarRef(nodep->fileline(),
+					    clkvscp, false));
+	} else {
+	    nodep->v3fatalSrc("Bad edge type");
+	}
+	return newp;
+    }
+    AstNode* createSenGateEquation(AstSenGate* nodep) {
+	AstNode* newp = new AstAnd(nodep->fileline(),
+				   createSenseEquation(nodep->sensesp()),
+				   nodep->rhsp()->cloneTree(true));
+	return newp;
+    }
+    AstNode* createSenseEquation(AstNodeSenItem* nodesp) {
+	// Nodep may be a list of elements; we need to walk it
 	AstNode* senEqnp = NULL;
-	for (AstSenItem* senp = nodep->sensesp(); senp; senp=senp->nextp()->castSenItem()) {
-	    // We know the var is clean, and one bit, so we use binary ops
-	    // for speed instead of logical ops.
-	    // POSEDGE:  var & ~var_last
-	    // NEGEDGE:  ~var & var_last
-	    // BOTHEDGE:  var ^ var_last
-	    // HIGHEDGE:  var
-	    // LOWEDGE:  ~var
-	    AstVarScope* lastVscp = senp->varrefp()->varScopep()->userp()->castNode()->castVarScope();
+	for (AstNodeSenItem* senp = nodesp; senp; senp=senp->nextp()->castNodeSenItem()) {
 	    AstNode* senOnep = NULL;
-	    if (senp->edgeType()==AstEdgeType::POSEDGE) {
-		if (!lastVscp) senp->v3fatalSrc("No last var ptr?\n");
-		senOnep = new AstAnd(senp->fileline(),
-				     new AstVarRef(senp->fileline(),
-						   senp->varrefp()->varScopep(), false),
-				     new AstNot(senp->fileline(),
-						new AstVarRef(senp->fileline(),
-							      lastVscp, false)));
-	    } else if (senp->edgeType()==AstEdgeType::NEGEDGE) {
-		if (!lastVscp) senp->v3fatalSrc("No last var ptr?\n");
-		senOnep = new AstAnd(senp->fileline(),
-				     new AstNot(senp->fileline(),
-						new AstVarRef(senp->fileline(),
-							      senp->varrefp()->varScopep(), false)),
-				     new AstVarRef(senp->fileline(), lastVscp, false));
-	    } else if (senp->edgeType()==AstEdgeType::BOTHEDGE) {
-		if (!lastVscp) senp->v3fatalSrc("No last var ptr?\n");
-		senOnep = new AstXor(senp->fileline(),
-				     new AstVarRef(senp->fileline(),
-						   senp->varrefp()->varScopep(), false),
-				     new AstVarRef(senp->fileline(), lastVscp, false));
-	    } else if (senp->edgeType()==AstEdgeType::HIGHEDGE) {
-		senOnep = new AstVarRef(senp->fileline(),
-					senp->varrefp()->varScopep(), false);
-	    } else if (senp->edgeType()==AstEdgeType::LOWEDGE) {
-		senOnep = new AstNot(senp->fileline(),
-				     new AstVarRef(senp->fileline(),
-						   senp->varrefp()->varScopep(), false));
+	    if (AstSenItem* itemp = senp->castSenItem()) {
+		senOnep = createSenItemEquation(itemp);
+	    } else if (AstSenGate* itemp = senp->castSenGate()) {
+		senOnep = createSenGateEquation(itemp);
 	    } else {
-		senp->v3fatalSrc("Bad edge type");
+		senp->v3fatalSrc("Strange node under sentree");
 	    }
 	    if (senEqnp) {
 		// Add new OR to the sensitivity list equation
@@ -159,14 +185,7 @@ private:
 	return senEqnp;
     }
     AstIf* makeActiveIf(AstSenTree* sensesp) {
-	for (AstSenItem* senp = sensesp->sensesp(); senp; senp=senp->nextp()->castSenItem()) {
-	    if (senp->edgeType() != AstEdgeType::HIGHEDGE
-		&& senp->varrefp()) {
-		AstVarScope* oldvscp = senp->varrefp()->varScopep();
-		getCreateLastClk(oldvscp);
-	    }
-	}
-	AstNode* senEqnp = createSenseEquation(sensesp);
+	AstNode* senEqnp = createSenseEquation(sensesp->sensesp());
 	if (!senEqnp) sensesp->v3fatalSrc("No sense equation, shouldn't be in sequent activation.");
 	AstIf* newifp = new AstIf (sensesp->fileline(),
 				   senEqnp, NULL, NULL);
@@ -183,8 +202,8 @@ private:
 	m_topScopep=nodep;
 	m_scopep = nodep->scopep();
 	if (!m_scopep) nodep->v3fatalSrc("No scope found on top level, perhaps you have no statements?\n");
-	//VV*****  We reset all userp()
-	AstNode::userClearTree();
+	//VV*****  We reset all user1p()
+	AstNode::user1ClearTree();
 	// Make top functions
 	{
 	    AstCFunc* funcp = new AstCFunc(nodep->fileline(), "_eval", m_scopep);
@@ -245,6 +264,7 @@ private:
 	m_modp = nodep;
 	m_stableNum = 0;
 	nodep->iterateChildren(*this);
+	m_modp= NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	//UINFO(4," SCOPE   "<<nodep<<endl);
@@ -260,8 +280,7 @@ private:
     virtual void visit(AstAlways* nodep, AstNUser*) {
 	AstNode* cmtp = new AstComment(nodep->fileline(), nodep->typeName());
 	nodep->replaceWith(cmtp);
-	AstNode* stmtsp = nodep->bodysp();
-	if (stmtsp) {
+	if (AstNode* stmtsp = nodep->bodysp()) {
 	    stmtsp->unlinkFrBackWithNext();
 	    cmtp->addNextHere(stmtsp);
 	}
@@ -270,18 +289,36 @@ private:
     virtual void visit(AstAlwaysPost* nodep, AstNUser*) {
 	AstNode* cmtp = new AstComment(nodep->fileline(), nodep->typeName());
 	nodep->replaceWith(cmtp);
-	AstNode* stmtsp = nodep->bodysp();
-	if (stmtsp) {
+	if (AstNode* stmtsp = nodep->bodysp()) {
 	    stmtsp->unlinkFrBackWithNext();
 	    cmtp->addNextHere(stmtsp);
 	}
 	nodep->deleteTree(); nodep = NULL;
     }
+    virtual void visit(AstCoverToggle* nodep, AstNUser*) {
+	//nodep->dumpTree(cout,"ct:");
+	//COVERTOGGLE(INC, ORIG, CHANGE) ->
+	//   IF(ORIG ^ CHANGE) { INC; CHANGE = ORIG; }
+	AstNode* incp = nodep->incp()->unlinkFrBack();
+	AstNode* origp = nodep->origp()->unlinkFrBack();
+	AstNode* changep = nodep->changep()->unlinkFrBack();
+	AstIf* newp = new AstIf(nodep->fileline(),
+				new AstXor(nodep->fileline(),
+					   origp,
+					   changep),
+				incp, NULL);
+	// We could add another IF to detect posedges, and only increment if so.
+	// It's another whole branch though verus a potential memory miss.
+	// We'll go with the miss.
+	newp->addIfsp(new AstAssign(nodep->fileline(),
+				    changep->cloneTree(false),
+				    origp->cloneTree(false)));
+	nodep->replaceWith(newp); nodep->deleteTree(); nodep=NULL;
+    }
     virtual void visit(AstInitial* nodep, AstNUser*) {
 	AstNode* cmtp = new AstComment(nodep->fileline(), nodep->typeName());
 	nodep->replaceWith(cmtp);
-	AstNode* stmtsp = nodep->bodysp();
-	if (stmtsp) {
+	if (AstNode* stmtsp = nodep->bodysp()) {
 	    stmtsp->unlinkFrBackWithNext();
 	    cmtp->addNextHere(stmtsp);
 	}
@@ -494,7 +531,7 @@ private:
 
 public:
     // CONSTUCTORS
-    ClockVisitor(AstNode* nodep) {
+    ClockVisitor(AstNetlist* nodep) {
 	m_modp=NULL; m_activep=NULL;
 	m_evalFuncp = NULL;
 	m_topScopep=NULL;

src/V3Clock.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Combine.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -58,8 +59,14 @@
 class CombBaseVisitor : public AstNVisitor {
 protected:
     // STATE
-    //int debug() { return 9; }
+
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     virtual ~CombBaseVisitor() {}
 
     //***** optimization levels
@@ -174,6 +181,9 @@ private:
     //  AstCFunc::user3p()	-> AstCFunc*, If set, replace ccalls to this func with new func
     //  AstNodeStmt::user3()	-> AstNode*.  True if to ignore this cell
     //  AstNodeStmt::user4()	-> V3Hashed::V3Hash.  Hash value of this node (hash of 0 is illegal)
+    AstUser1InUse	m_inuser1;
+    AstUser3InUse	m_inuser3;
+    //AstUser4InUse	part of V3Hashed
 
     // STATE
     typedef enum {STATE_IDLE, STATE_HASH, STATE_DUP} CombineState;
@@ -186,7 +196,7 @@ private:
     int			m_modNFuncs;	// Number of functions made
     AstNode*		m_walkLast1p;	// Final node that is the same in duplicate list
     AstNode*		m_walkLast2p;	// Final node that is the same in duplicate list
-    V3Hashed		m_hashed;	// Hash for every node
+    V3Hashed		m_hashed;	// Hash for every node in module
 
     // METHODS
     void hashStatement(AstNode* nodep) {
@@ -279,7 +289,7 @@ private:
 	    if (node1p==node2p) continue;
 	    //
 	    // We need to mark iteration to prevent matching code inside code (abab matching in ababab)
-	    AstNode::userClearTree();	// userp() used on entire tree
+	    AstNode::user1ClearTree();	// user1p() used on entire tree
 	    m_walkLast1p = NULL;
 	    m_walkLast2p = NULL;
 	    int depth = walkDupCodeNext(node1p, node2p, 1);
@@ -305,7 +315,7 @@ private:
 
     int walkDupCodeNext(AstNode* node1p, AstNode* node2p, int level) {
 	// Find number of common statements between the two node1p_nextp's...
-	if (node1p->userp() || node2p->userp()) return 0;   // Already iterated
+	if (node1p->user1p() || node2p->user1p()) return 0;   // Already iterated
 	if (node1p->user3p() || node2p->user3p()) return 0;   // Already merged
 	if (!m_hashed.sameNodes(node1p,node2p)) return 0; // walk of tree has same comparison
 	V3Hash hashval(node1p->user4p());
@@ -313,8 +323,8 @@ private:
 	//UINFO(9,"        wdup2 "<<level<<" "<<V3Hash(node2p->user4p())<<" "<<node2p<<endl);
 	m_walkLast1p = node1p;
 	m_walkLast2p = node2p;
-	node1p->user(true);
-	node2p->user(true);
+	node1p->user1(true);
+	node2p->user1(true);
 	if (node1p->nextp() && node2p->nextp()) {
 	    return hashval.depth()+walkDupCodeNext(node1p->nextp(), node2p->nextp(), level+1);
 	}
@@ -378,8 +388,7 @@ private:
 	// Track all callers of each function
 	m_call.main(nodep);
 	//
-	AstNode::user3ClearTree();	// userp() used on entire tree
-	//In V3Hashed AstNode::user4ClearTree();	// userp() used on entire tree
+	//In V3Hashed AstNode::user4ClearTree();	// user4p() used on entire tree
 	// Iterate modules backwards, in bottom-up order.
 	// Required so that a module instantiating another can benefit from collapsing.
 	nodep->iterateChildrenBackwards(*this);
@@ -393,6 +402,9 @@ private:
 	m_state = STATE_HASH;
 	nodep->iterateChildren(*this);
 	m_state = STATE_IDLE;
+	if (debug()>=9) {
+	    m_hashed.dumpFilePrefixed("combine");
+	}
 	// Walk the hashes removing empty functions
 	if (emptyFunctionDeletion()) {
 	    walkEmptyFuncs();
@@ -407,6 +419,7 @@ private:
 	    nodep->iterateChildren(*this);
 	    m_state = STATE_IDLE;
 	}
+	m_modp = NULL;
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
 	m_funcp = nodep;

src/V3Combine.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Const.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -30,6 +31,7 @@
 #include <cstdarg>
 #include <unistd.h>
 #include <map>
+#include <algorithm>
 
 #include "V3Global.h"
 #include "V3Const.h"
@@ -37,17 +39,18 @@
 #include "V3Ast.h"
 #include "V3Width.h"
 #include "V3Signed.h"
+#include "V3Simulate.h"
 
 //######################################################################
 // Utilities
 
 class ConstVarMarkVisitor : public AstNVisitor {
     // NODE STATE
-    // AstVar::userp		-> bool, Var marked, 0=not set yet
+    // AstVar::user4p		-> bool, Var marked, 0=not set yet
 private:
     // VISITORS
     virtual void visit(AstVarRef* nodep, AstNUser*) {
-	if (nodep->varp()) nodep->varp()->user(1);
+	if (nodep->varp()) nodep->varp()->user4(1);
     }
     virtual void visit(AstNode* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
@@ -55,21 +58,21 @@ private:
 public:
     // CONSTUCTORS
     ConstVarMarkVisitor(AstNode* nodep) {
-	AstNode::userClearTree();
-	nodep->iterateAndNext(*this, NULL);
+	AstNode::user4ClearTree();  // Check marked InUse before we're called
+	nodep->accept(*this);
     }
     virtual ~ConstVarMarkVisitor() {}
 };
 
 class ConstVarFindVisitor : public AstNVisitor {
     // NODE STATE
-    // AstVar::userp		-> bool, input from ConstVarMarkVisitor
+    // AstVar::user4p		-> bool, input from ConstVarMarkVisitor
     // MEMBERS
     bool m_found;
 private:
     // VISITORS
     virtual void visit(AstVarRef* nodep, AstNUser*) {
-	if (nodep->varp() && nodep->varp()->user()) m_found = true;
+	if (nodep->varp() && nodep->varp()->user4()) m_found = true;
     }
     virtual void visit(AstNode* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
@@ -91,9 +94,9 @@ public:
 class ConstVisitor : public AstNVisitor {
 private:
     // NODE STATE
-    // ** only when m_warn is set.  If state is needed other times,
+    // ** only when m_warn/m_expensive is set.  If state is needed other times,
     // ** must track down everywhere V3Const is called and make sure no overlaps.
-    // AstVar::userp		-> Used by ConstVarMarkVisitor/ConstVarFindVisitor
+    // AstVar::user4p		-> Used by ConstVarMarkVisitor/ConstVarFindVisitor
 
     // STATE
     bool	m_params;	// If true, propogate parameterized and true numbers only
@@ -101,11 +104,17 @@ private:
     bool	m_wremove;	// Inside scope, no assignw removal
     bool	m_warn;		// Output warnings
     bool	m_cpp;		// C++ conversions only
+    bool	m_expensive;	// Enable computationally expensive optimizations
     AstModule*	m_modp;		// Current module
     AstNode*	m_scopep;	// Current scope
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     bool operandConst (AstNode* nodep) {
 	return (nodep->castConst());
     }
@@ -132,6 +141,91 @@ private:
 	if (rnodep->width() != bnodep->width()) return false;
 	return operandsSame(bnodep->lhsp(), rnodep->lhsp());
     }
+    bool operandAsvLUp (AstNode* nodep) {
+	// BIASV(BIASV(CONSTll,lr),r) -> BIASV(CONSTll,BIASV(lr,r))
+	//
+	// Example of how this is useful:
+	// BIASV(BIASV(CONSTa,b...),BIASV(CONSTc,d...))	 // hits operandAsvUp
+	// BIASV(CONSTa,BIASV(b...,BIASV(CONSTc,d...)))	 // hits operandAsvUp
+	// BIASV(CONSTa,BIASV(CONSTc,BIASV(c...,d...)))  // hits operandAsvConst
+	// BIASV(BIASV(CONSTa,CONSTc),BIASV(c...,d...))) // hits normal constant propagation
+	// BIASV(CONST_a_c,BIASV(c...,d...)))	
+	//
+	// Idea for the future: All BiComAsvs could be lists, sorted by if they're constant
+	AstNodeBiComAsv* bnodep = nodep->castNodeBiComAsv();
+	if (!bnodep) return false;
+	AstNodeBiComAsv* lnodep = bnodep->lhsp()->castNodeBiComAsv();
+	if (!lnodep) return false;
+	if (lnodep->type() != bnodep->type()) return false;
+	if (lnodep->width() != bnodep->width()) return false;
+	return lnodep->lhsp()->castConst();
+    }
+    bool operandAsvRUp (AstNode* nodep) {
+	// BIASV(l,BIASV(CONSTrl,rr)) -> BIASV(CONSTrl,BIASV(l,rr))
+	AstNodeBiComAsv* bnodep = nodep->castNodeBiComAsv();
+	if (!bnodep) return false;
+	AstNodeBiComAsv* rnodep = bnodep->rhsp()->castNodeBiComAsv();
+	if (!rnodep) return false;
+	if (rnodep->type() != bnodep->type()) return false;
+	if (rnodep->width() != bnodep->width()) return false;
+	return rnodep->lhsp()->castConst();
+    }
+    static bool operandAndOrSame(AstNode* nodep) {
+	AstNodeBiop* np = nodep->castNodeBiop();
+	AstNodeBiop* lp = np->lhsp()->castNodeBiop();
+	AstNodeBiop* rp = np->rhsp()->castNodeBiop();
+	return (lp && rp
+		&& lp->width()==rp->width()
+		&& lp->type()==rp->type()
+		&& operandsSame(lp->lhsp(),rp->lhsp()));
+    }
+    static bool matchOrAndNot(AstNodeBiop* nodep) {
+	// AstOr{$a, AstAnd{AstNot{$b}, $c}} if $a.width1, $a==$b => AstOr{$a,$c}
+	// Someday we'll sort the biops completely and this can be simplified
+	// This often results from our simplified clock generation:
+	// if (rst) ... else if (enable)... -> OR(rst,AND(!rst,enable))
+	AstNode* ap;
+	AstNodeBiop* andp;
+	if      (nodep->lhsp()->castAnd()) { andp=nodep->lhsp()->castAnd(); ap=nodep->rhsp(); }
+	else if (nodep->rhsp()->castAnd()) { andp=nodep->rhsp()->castAnd(); ap=nodep->lhsp(); }
+	else return false;
+	AstNodeUniop* notp;
+	AstNode* cp;
+	if      (andp->lhsp()->castNot()) { notp=andp->lhsp()->castNot(); cp=andp->rhsp(); }
+	else if (andp->rhsp()->castNot()) { notp=andp->rhsp()->castNot(); cp=andp->lhsp(); }
+	else return false;
+	AstNode* bp = notp->lhsp();
+	if (!operandsSame(ap, bp)) return false;
+	// Do it
+	cp->unlinkFrBack();
+	andp->unlinkFrBack()->deleteTree(); andp=NULL; notp=NULL;
+	// Replace whichever branch is now dangling
+	if (nodep->rhsp()) nodep->lhsp(cp);
+	else nodep->rhsp(cp);
+	return true;
+    }
+    static bool operandShiftSame(AstNode* nodep) {
+	AstNodeBiop* np = nodep->castNodeBiop();
+	{
+	    AstShiftL* lp = np->lhsp()->castShiftL();
+	    AstShiftL* rp = np->rhsp()->castShiftL();
+	    if (lp && rp) {
+		return (lp->width() == rp->width()
+			&& lp->lhsp()->width() == rp->lhsp()->width()
+			&& operandsSame(lp->rhsp(), rp->rhsp()));
+	    }
+	}
+	{
+	    AstShiftR* lp = np->lhsp()->castShiftR();
+	    AstShiftR* rp = np->rhsp()->castShiftR();
+	    if (lp && rp) {
+		return (lp->width() == rp->width()
+			&& lp->lhsp()->width() == rp->lhsp()->width()
+			&& operandsSame(lp->rhsp(), rp->rhsp()));
+	    }
+	}
+	return false;
+    }
     bool operandHugeShiftL(AstNodeBiop* nodep) {
 	return (nodep->rhsp()->castConst()
 		&& nodep->rhsp()->castConst()->toUInt() >= (uint32_t)(nodep->width()));
@@ -219,14 +313,24 @@ private:
 	    if (m_warn
 		&& nodep->lsbp()->castConst()
 		&& nodep->widthp()->castConst()
-		&& (!varp->rangep() || varp->msb())  // else it's non-resolvable parameterized
-		&& ( (  (nodep->msbConst() > varp->msbMaxSelect())
-			|| (nodep->lsbConst() > varp->msbMaxSelect())))) {
-		nodep->v3error("Selection index out of range: "
-			       <<nodep->msbConst()<<":"<<nodep->lsbConst()
-			       <<" outside "<<varp->msbMaxSelect()<<":0"
-			       <<(varp->lsb()>=0 ? ""
-				  :" (adjusted +"+cvtToStr(-varp->lsb())+" to account for negative lsb)"));
+		&& (!varp->rangep() || varp->msb())) {  // else it's non-resolvable parameterized
+		if (nodep->lsbp()->castConst()->num().isFourState()
+		    || nodep->widthp()->castConst()->num().isFourState()) {
+		    nodep->v3error("Selection index is constantly unknown or tristated: "
+				   "lsb="<<nodep->lsbp()->name()<<" width="<<nodep->widthp()->name());
+		    // Replacing nodep will make a mess above, so we replace the offender
+		    replaceZero(nodep->lsbp());
+		}
+		else if ((nodep->msbConst() > varp->msbMaxSelect())
+			 || (nodep->lsbConst() > varp->msbMaxSelect())) {
+		    // See also warning in V3Width
+		    nodep->v3error("Selection index out of range: "
+				   <<nodep->msbConst()<<":"<<nodep->lsbConst()
+				   <<" outside "<<varp->msbMaxSelect()<<":0"
+				   <<(varp->lsb()>=0 ? ""
+				      :" (adjusted +"+cvtToStr(-varp->lsb())+" to account for negative lsb)"));
+		    // Don't replace with zero, we'll do it later
+		}
 	    }
 	}
 	return false;  // Not a transform, so NOP
@@ -272,7 +376,9 @@ private:
     void replaceNum (AstNode* oldp, const V3Number& num) {
 	// Replace oldp node with a constant set to specified value
 	UASSERT (oldp, "Null old\n");
-	if (oldp->castConst()) oldp->v3fatalSrc("Already constant??\n");
+	if (oldp->castConst() && !oldp->castConst()->num().isFourState()) {
+	    oldp->v3fatalSrc("Already constant??\n");
+	}
 	AstNode* newp = new AstConst(oldp->fileline(), num);
 	newp->widthSignedFrom(oldp);
 	if (debug()>5) oldp->dumpTree(cout,"  const_old: ");
@@ -367,6 +473,66 @@ private:
 	if (rp->lhsp()->castConst() && rp->rhsp()->castConst()) replaceConst(rp);
 	//nodep->dumpTree(cout, "  repAsvConst_new: ");
     }
+    void replaceAsvLUp (AstNodeBiop* nodep) {
+	// BIASV(BIASV(CONSTll,lr),r) -> BIASV(CONSTll,BIASV(lr,r))
+	AstNodeBiop* lp = nodep->lhsp()->unlinkFrBack()->castNodeBiop();
+	AstNode* llp = lp->lhsp()->unlinkFrBack();
+	AstNode* lrp = lp->rhsp()->unlinkFrBack();
+	AstNode* rp  = nodep->rhsp()->unlinkFrBack();
+	nodep->lhsp(llp);
+	nodep->rhsp(lp);
+	lp->lhsp(lrp);
+	lp->rhsp(rp);
+	//nodep->dumpTree(cout, "  repAsvLUp_new: ");
+    }
+    void replaceAsvRUp (AstNodeBiop* nodep) {
+	// BIASV(l,BIASV(CONSTrl,rr)) -> BIASV(CONSTrl,BIASV(l,rr))
+	AstNode* lp  = nodep->lhsp()->unlinkFrBack();
+	AstNodeBiop* rp = nodep->rhsp()->unlinkFrBack()->castNodeBiop();
+	AstNode* rlp = rp->lhsp()->unlinkFrBack();
+	AstNode* rrp = rp->rhsp()->unlinkFrBack();
+	nodep->lhsp(rlp);
+	nodep->rhsp(rp);
+	rp->lhsp(lp);
+	rp->rhsp(rrp);
+	//nodep->dumpTree(cout, "  repAsvRUp_new: ");
+    }
+    void replaceAndOr (AstNodeBiop* nodep) {
+	// Or(And(CONSTll,lr),And(CONSTrl==ll,rr)) -> And(CONSTll,Or(lr,rr))
+	// (Or/And may also be reversed)
+	AstNodeBiop* lp = nodep->lhsp()->unlinkFrBack()->castNodeBiop();
+	AstNode* llp = lp->lhsp()->unlinkFrBack();
+	AstNode* lrp = lp->rhsp()->unlinkFrBack();
+	AstNodeBiop* rp = nodep->rhsp()->unlinkFrBack()->castNodeBiop();
+	AstNode* rlp = rp->lhsp()->unlinkFrBack();
+	AstNode* rrp = rp->rhsp()->unlinkFrBack();
+	nodep->replaceWith(lp);
+	lp->lhsp(llp);
+	lp->rhsp(nodep);
+	nodep->lhsp(lrp);
+	nodep->rhsp(rrp);
+	rp->deleteTree();
+	rlp->deleteTree();
+	//nodep->dumpTree(cout, "  repAndOr_new: ");
+    }
+    void replaceShiftSame (AstNodeBiop* nodep) {
+	// Or(Shift(ll,CONSTlr),Shift(rl,CONSTrr==lr)) -> Shift(Or(ll,rl),CONSTlr)
+	// (Or/And may also be reversed)
+	AstNodeBiop* lp = nodep->lhsp()->unlinkFrBack()->castNodeBiop();
+	AstNode* llp = lp->lhsp()->unlinkFrBack();
+	AstNode* lrp = lp->rhsp()->unlinkFrBack();
+	AstNodeBiop* rp = nodep->rhsp()->unlinkFrBack()->castNodeBiop();
+	AstNode* rlp = rp->lhsp()->unlinkFrBack();
+	AstNode* rrp = rp->rhsp()->unlinkFrBack();
+	nodep->replaceWith(lp);
+	lp->lhsp(nodep);
+	lp->rhsp(lrp);
+	nodep->lhsp(llp);
+	nodep->rhsp(rlp);
+	rp->deleteTree();
+	rrp->deleteTree();
+	//nodep->dumpTree(cout, "  repShiftSame_new: ");
+    }
     void replaceExtend (AstNode* nodep, AstNode* arg0p) {
 	// -> EXTEND(nodep)
 	// like a AstExtend{$rhsp}, but we need to set the width correctly from base node
@@ -414,7 +580,7 @@ private:
 	AstNode* ap = lhsp->lhsp()->unlinkFrBack();
 	AstNode* bp = lhsp->rhsp()->unlinkFrBack();
 	AstNodeBiop* shift1p = nodep;
-	AstNodeBiop* shift2p = nodep->cloneTree(true)->castNodeBiop();
+	AstNodeBiop* shift2p = nodep->cloneTree(true);
 	shift1p->lhsp(ap); shift1p->rhsp(shiftp->cloneTree(true));
 	shift2p->lhsp(bp); shift2p->rhsp(shiftp);
 	AstNodeBiop* newp = lhsp;
@@ -550,6 +716,9 @@ private:
 	else if (!m_cpp && nodep->lhsp()->castConcat()) {
 	    bool need_temp = false;
 	    if (m_warn && !nodep->castAssignDly()) {  // Is same var on LHS and RHS?
+		// Note only do this (need user4) when m_warn, which is
+		// done as unique visitor
+		AstUser4InUse	m_inuser4;
 		ConstVarMarkVisitor mark(nodep->lhsp());
 		ConstVarFindVisitor find(nodep->rhsp());
 		if (find.found()) need_temp = true;
@@ -599,8 +768,8 @@ private:
 		if (!m_modp) nodep->v3fatalSrc("Not under module");
 		// We could create just one temp variable, but we'll get better optimization
 		// if we make one per term.
-		string name1 = ((string)"__Vconcswap__"+cvtToStr(m_modp->varNumGetInc()));
-		string name2 = ((string)"__Vconcswap__"+cvtToStr(m_modp->varNumGetInc()));
+		string name1 = ((string)"__Vconcswap"+cvtToStr(m_modp->varNumGetInc()));
+		string name2 = ((string)"__Vconcswap"+cvtToStr(m_modp->varNumGetInc()));
 		AstVar* temp1p = new AstVar(sel1p->fileline(), AstVarType::BLOCKTEMP, name1,
 					    new AstRange(sel1p->fileline(), msb1-lsb1, 0));
 		AstVar* temp2p = new AstVar(sel2p->fileline(), AstVarType::BLOCKTEMP, name2,
@@ -670,6 +839,26 @@ private:
 	if (debug()>=9) newp->dumpTree(cout,"       _new: ");
     }
 
+    void replaceWithSimulation(AstNode* nodep) {
+	SimulateVisitor simvis;
+	// Run it - may be unoptimizable due to large for loop, etc
+	simvis.mainParamEmulate(nodep);
+	if (!simvis.optimizable()) {
+		    AstNode* errorp = simvis.whyNotNodep(); if (!errorp) errorp = nodep;
+	    nodep->v3error("Expecting expression to be constant, but can't determine constant for "
+			   <<nodep->prettyTypeName()<<endl
+			   <<V3Error::msgPrefix()<<errorp->fileline()<<"... Location of non-constant "
+			   <<errorp->prettyTypeName()<<": "<<simvis.whyNotMessage());
+	    replaceZero(nodep); nodep=NULL;
+	} else {
+	    // Fetch the result
+	    V3Number* outnump = simvis.fetchNumberNull(nodep);
+	    if (!outnump) nodep->v3fatalSrc("No number returned from simulation");
+	    // Replace it
+	    replaceNum(nodep,*outnump); nodep=NULL;
+	}
+    }
+
     //----------------------------------------
 
     // VISITORS
@@ -864,7 +1053,7 @@ private:
 	nodep->iterateChildren(*this);
 	if (!nodep->varp()) nodep->v3fatalSrc("Not linked");
 	bool did=false;
-	if (!m_cpp && nodep->varp()->hasSimpleInit()) {
+	if (!m_cpp && nodep->varp()->hasSimpleInit() && !nodep->backp()->castAttrOf()) {
 	    //if (debug()) nodep->varp()->initp()->dumpTree(cout,"  visitvaref: ");
 	    nodep->varp()->initp()->iterateAndNext(*this);
 	    if (operandConst(nodep->varp()->initp())
@@ -885,44 +1074,34 @@ private:
     }
     virtual void visit(AstAttrOf* nodep, AstNUser*) {
 	// Don't iterate children, don't want to loose VarRef.
-	if (nodep->attrType()==AstAttrType::SCOPE_TEXT) {
-	} else if (nodep->attrType()==AstAttrType::BITS) {
+	if (nodep->attrType()==AstAttrType::BITS) {
 	    if (!nodep->fromp() || !nodep->fromp()->widthMin()) nodep->v3fatalSrc("Unsized expression");
 	    V3Number num (nodep->fileline(), 32, nodep->fromp()->widthMin());
 	    replaceNum(nodep, num); nodep=NULL;
 	} else {
-	    if (!nodep->fromp()->castNodeVarRef()) nodep->v3fatalSrc("Not linked");
-	    AstVar* varp = nodep->fromp()->castNodeVarRef()->varp();
-	    if (!varp) nodep->v3fatalSrc("Not linked");
-	    if (nodep->attrType()==AstAttrType::RANGE_LSB) {
-		if (!varp->rangep()) nodep->v3fatalSrc("RANGE_LSB on vec w/o range\n");
-		if (operandConst(varp->rangep()->lsbp())) {
-		    V3Number num (nodep->fileline(), 32, varp->lsb());
-		    replaceNum(nodep, num); nodep=NULL;
-		}
-	    } else if (nodep->attrType()==AstAttrType::ARRAY_LSB) {
-		AstRange* arrayp=varp->arrayp(nodep->dimension());
-		if (!arrayp) nodep->v3fatalSrc("ARRAY_LSB on vec w/o range or right # dimensions\n");
-		if (operandConst(arrayp->lsbp())) {
-		    V3Number num (nodep->fileline(), 32, arrayp->lsbConst());
-		    replaceNum(nodep, num); nodep=NULL;
-		}
-	    } else nodep->v3fatalSrc("Missing ATTR type case\n");
+	    nodep->v3fatalSrc("Missing ATTR type case");
 	}
     }
+    bool onlySenItemInSenTree(AstNodeSenItem* nodep) {
+	// Only one if it's not in a list
+	return (!nodep->nextp() && nodep->backp()->nextp() != nodep);
+    }
     virtual void visit(AstSenItem* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
 	if (nodep->sensp()->castConst()
 	    || (nodep->varrefp() && nodep->varrefp()->varp()->isParam())) {
 	    // Constants in sensitivity lists may be removed (we'll simplify later)
-	    AstSenItem* newp;
 	    if (nodep->isClocked()) {  // A constant can never get a pos/negexge
-		newp = new AstSenItem(nodep->fileline(), AstSenItem::Never());
+		if (onlySenItemInSenTree(nodep)) {
+		    nodep->replaceWith(new AstSenItem(nodep->fileline(), AstSenItem::Never()));
+		    nodep->deleteTree(); nodep=NULL;
+		} else {
+		    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
+		}
 	    } else {  // Otherwise it may compute a result that needs to settle out
-		newp = new AstSenItem(nodep->fileline(), AstSenItem::Combo());
+		nodep->replaceWith(new AstSenItem(nodep->fileline(), AstSenItem::Combo()));
+		nodep->deleteTree(); nodep=NULL;
 	    }
-	    nodep->replaceWith(newp);
-	    nodep->deleteTree(); nodep=NULL;
 	} else if (nodep->sensp()->castNot()) {
 	    // V3Gate may propagate NOTs into clocks... Just deal with it
 	    AstNode* sensp = nodep->sensp();
@@ -942,6 +1121,150 @@ private:
 	    if (nodep->hasVar() && !nodep->varrefp()) nodep->v3fatalSrc("Null sensitivity variable");
 	}
     }
+    virtual void visit(AstSenGate* nodep, AstNUser*) {
+	nodep->iterateChildren(*this);
+	if (AstConst* constp = nodep->rhsp()->castConst()) {
+	    if (constp->isZero()) {
+		UINFO(4,"SENGATE(...,0)->NEVER"<<endl);
+		if (onlySenItemInSenTree(nodep)) {
+		    nodep->replaceWith(new AstSenItem(nodep->fileline(), AstSenItem::Never()));
+		    nodep->deleteTree(); nodep=NULL;
+		} else {
+		    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
+		}
+	    } else {
+		UINFO(4,"SENGATE(SENITEM,0)->ALWAYS SENITEM"<<endl);
+		AstNode* senitemp = nodep->sensesp()->unlinkFrBack();
+		nodep->replaceWith(senitemp);
+		nodep->deleteTree(); nodep=NULL;
+	    }
+	}
+    }
+
+    struct SenItemCmp {
+	inline bool operator () (AstNodeSenItem* lhsp, AstNodeSenItem* rhsp) const {
+	    if (lhsp->type() < rhsp->type()) return true;
+	    if (lhsp->type() > rhsp->type()) return false;
+	    const AstSenItem* litemp = lhsp->castSenItem();
+	    const AstSenItem* ritemp = rhsp->castSenItem();
+	    if (litemp && ritemp) {
+		// Looks visually better if we keep sorted by name
+		if (litemp->edgeType() < ritemp->edgeType()) return true;
+		if (litemp->edgeType() > ritemp->edgeType()) return false;
+		if (!litemp->varrefp() &&  ritemp->varrefp()) return true;
+		if ( litemp->varrefp() && !ritemp->varrefp()) return false;
+		if (litemp->varrefp() && ritemp->varrefp()) {
+		    if (litemp->varrefp()->name() < ritemp->varrefp()->name()) return true;
+		    if (litemp->varrefp()->name() > ritemp->varrefp()->name()) return false;
+		    // But might be same name with different scopes
+		    if (litemp->varrefp()->varScopep() < ritemp->varrefp()->varScopep()) return true;
+		    if (litemp->varrefp()->varScopep() > ritemp->varrefp()->varScopep()) return false;
+		}
+	    }
+	    return false;
+	}
+    };
+
+    virtual void visit(AstSenTree* nodep, AstNUser*) {
+	nodep->iterateChildren(*this);
+	if (m_expensive) {
+	    //cout<<endl; nodep->dumpTree(cout,"ssin: ");
+	    // Optimize ideas for the future:
+	    //   SENTREE(... SENGATE(x,a), SENGATE(SENITEM(x),b) ...)  => SENGATE(x,OR(a,b))
+
+	    //   SENTREE(... SENITEM(x),   SENGATE(SENITEM(x),*) ...)  => SENITEM(x)
+	    // Do we need the SENITEM's to be identical?  No because we're
+	    // ORing between them; we just need to insure that the result is at
+	    // least as frequently activating.  So we simply
+	    // SENGATE(SENITEM(x)) -> SENITEM(x), then let it collapse with the
+	    // other SENITEM(x).
+	    {
+		AstUser4InUse	m_inuse4;
+		// Mark x in SENITEM(x)
+		for (AstNodeSenItem* senp = nodep->sensesp()->castNodeSenItem();
+		     senp; senp=senp->nextp()->castNodeSenItem()) {
+		    if (AstSenItem* itemp = senp->castSenItem()) {
+			if (itemp->varrefp() && itemp->varrefp()->varScopep()) {
+			    itemp->varrefp()->varScopep()->user4(1);
+			}
+		    }
+		}
+		// Find x in SENTREE(SENITEM(x))
+		for (AstNodeSenItem* nextp, * senp = nodep->sensesp()->castNodeSenItem();
+		     senp; senp=nextp) {
+		    nextp=senp->nextp()->castNodeSenItem();
+		    if (AstSenGate* gatep = senp->castSenGate()) {
+			if (AstSenItem* itemp = gatep->sensesp()->castSenItem()) {
+			    if (itemp->varrefp() && itemp->varrefp()->varScopep()) {
+				if (itemp->varrefp()->varScopep()->user4()) {
+				    // Found, push this item up to the top
+				    itemp->unlinkFrBack();
+				    nodep->addSensesp(itemp);
+				    gatep->unlinkFrBack()->deleteTree(); gatep=NULL; senp=NULL;
+				}
+			    }
+			}
+		    }
+		}
+	    }
+
+	    // Sort the sensitivity names so "posedge a or b" and "posedge b or a" end up together.
+	    // Also, remove duplicate assignments, and fold POS&NEGs into ANYEDGEs
+	    // Make things a little faster; check first if we need a sort
+	    for (AstNodeSenItem* nextp, * senp = nodep->sensesp()->castNodeSenItem();
+		 senp; senp=nextp) {
+		nextp=senp->nextp()->castNodeSenItem();
+		SenItemCmp cmp;
+		if (nextp && !cmp(senp, nextp)) {
+		    // Something's out of order, sort it
+		    senp = NULL;
+		    vector<AstNodeSenItem*> vec;
+		    for (AstNodeSenItem* senp = nodep->sensesp()->castNodeSenItem(); senp; senp=senp->nextp()->castNodeSenItem()) {
+			vec.push_back(senp);
+		    }
+		    sort(vec.begin(), vec.end(), SenItemCmp());
+		    for (vector<AstNodeSenItem*>::iterator it=vec.begin(); it!=vec.end(); ++it) {
+			(*it)->unlinkFrBack();
+		    }
+		    for (vector<AstNodeSenItem*>::iterator it=vec.begin(); it!=vec.end(); ++it) {
+			nodep->addSensesp(*it);
+		    }
+		    break;
+		}
+	    }
+	    
+	    // Pass2, remove dup edges
+	    for (AstNodeSenItem* nextp, * senp = nodep->sensesp()->castNodeSenItem();
+		 senp; senp=nextp) {
+		nextp=senp->nextp()->castNodeSenItem();
+		AstNodeSenItem* cmpp = nextp;
+		AstSenItem* litemp = senp->castSenItem();
+		AstSenItem* ritemp = cmpp->castSenItem();
+		if (litemp && ritemp) {
+		    if ((litemp->varrefp() && ritemp->varrefp() && litemp->varrefp()->sameTree(ritemp->varrefp()))
+			|| (!litemp->varrefp() && !ritemp->varrefp())) {
+			// We've sorted in the order ANY, BOTH, POS, NEG, so we don't need to try opposite orders
+			if ((   litemp->edgeType()==AstEdgeType::ANYEDGE)   // ANY  or {BOTH|POS|NEG} -> ANY
+			    || (litemp->edgeType()==AstEdgeType::BOTHEDGE)  // BOTH or {POS|NEG} -> BOTH
+			    || (litemp->edgeType()==AstEdgeType::POSEDGE    // POS  or NEG -> BOTH
+				&& ritemp->edgeType()==AstEdgeType::NEGEDGE)
+			    || (litemp->edgeType()==ritemp->edgeType())	// Identical edges
+			    ) {
+			    // Fix edge of old node
+			    if (litemp->edgeType()==AstEdgeType::POSEDGE
+				&& ritemp->edgeType()==AstEdgeType::NEGEDGE)
+				litemp->edgeType(AstEdgeType::BOTHEDGE);
+			    // Remove redundant node
+			    ritemp->unlinkFrBack()->deleteTree(); ritemp=NULL; cmpp=NULL;
+			    // Try to collapse again
+			    nextp=litemp;
+			}
+		    }
+		}
+	    }
+	    //nodep->dumpTree(cout,"ssou: ");
+	}
+    }
 
     //-----
     // Zero elimination
@@ -1113,6 +1436,13 @@ private:
 	}
     }
 
+    virtual void visit(AstFuncRef* nodep, AstNUser*) {
+	nodep->iterateChildren(*this);
+	if (m_params) {  // Only parameters force us to do constant function call propagation
+	    replaceWithSimulation(nodep);
+	}
+    }
+
     virtual void visit(AstWhile* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
 	if (nodep->condp()->isZero()) {
@@ -1125,15 +1455,28 @@ private:
 	}
     }
 
+    // These are converted by V3Param.  Don't constify as we don't want the from() VARREF to disappear, if any
+    // If output of a presel didn't get consted, chances are V3Param didn't visit properly
+    virtual void visit(AstNodePreSel* nodep, AstNUser*) {}
+
     //-----
     // Below lines are magic expressions processed by astgen
     //  "AstNODETYPE {             # bracket not paren
     //                $accessor_name, ...
     //                             # ,, gets replaced with a , rather than &&
     //	             }" 	   # bracket not paren
-    //    ,"function to call"
-    // or ,"AstREPLACEMENT_TYPE{ $accessor }"
-    // or ,"!   		   # Print line number when matches, so can see operations
+    //    ,"what to call"
+    //
+    // Where "what_to_call" is:
+    //		"function to call"
+    //		"AstREPLACEMENT_TYPE{ $accessor }"
+    //		"!   		# Print line number when matches, so can see operations
+    //		"NEVER"		# Print error message
+    //		"DONE"		# Process of matching did the transform already
+
+    // In the future maybe support more complicated match & replace:
+    //   ("AstOr  {%a, AstAnd{AstNot{%b}, %c}} if %a.width1 if %a==%b",	"AstOr{%a,%c}; %b.delete");
+    // Lhs/rhs would be implied; for non math operations you'd need $lhsp etc.
 
     // Lint Checks
     //    v--- *1* These ops are always first, as we warn before replacing
@@ -1207,6 +1550,8 @@ private:
     TREEOP("AstNodeBiCom{!$lhsp.castConst, $rhsp.castConst}",	"swapSides(nodep)");
     TREEOP("AstNodeBiComAsv{operandAsvConst(nodep)}",	"replaceAsv(nodep)");
     TREEOP("AstNodeBiComAsv{operandAsvSame(nodep)}",	"replaceAsv(nodep)");
+    TREEOP("AstNodeBiComAsv{operandAsvLUp(nodep)}",	"replaceAsvLUp(nodep)");
+    TREEOP("AstNodeBiComAsv{operandAsvRUp(nodep)}",	"replaceAsvRUp(nodep)");
     //    v--- *1* as These ops are always first, as we warn before replacing
     TREEOP1("AstLt   {$lhsp, $rhsp.isZero}",		"replaceNumSigned(nodep,0)");
     TREEOP1("AstGte  {$lhsp, $rhsp.isZero}",		"replaceNumSigned(nodep,1)");
@@ -1318,6 +1663,14 @@ private:
     // CONCAT({const},CONCAT({const},{c})) -> CONCAT((constifiedCONC{const|const},{c}))
     TREEOPV("AstConcat{operandConcatMove(nodep)}",	"moveConcat(nodep)");
     TREEOPV("AstConcat{$lhsp.isZero, $rhsp}",		"replaceExtend(nodep, nodep->rhsp())");
+    // Common two-level operations that can be simplified
+    TREEOP ("AstAnd {$lhsp.castOr, $rhsp.castOr, operandAndOrSame(nodep)}",	"replaceAndOr(nodep)");
+    TREEOP ("AstOr  {$lhsp.castAnd,$rhsp.castAnd,operandAndOrSame(nodep)}",	"replaceAndOr(nodep)");
+    TREEOP ("AstOr  {matchOrAndNot(nodep)}",		"DONE");
+    TREEOP ("AstAnd {operandShiftSame(nodep)}",		"replaceShiftSame(nodep)");
+    TREEOP ("AstOr  {operandShiftSame(nodep)}",		"replaceShiftSame(nodep)");
+    TREEOP ("AstXor {operandShiftSame(nodep)}",		"replaceShiftSame(nodep)");
+    TREEOP ("AstXnor{operandShiftSame(nodep)}",		"replaceShiftSame(nodep)");
     // Note can't simplify a extend{extends}, extends{extend}, as the sign bits end up in the wrong places
     TREEOPV("AstExtend {$lhsp.castExtend}",		"replaceExtend(nodep, nodep->lhsp()->castExtend()->lhsp())");
     TREEOPV("AstExtendS{$lhsp.castExtendS}",		"replaceExtend(nodep, nodep->lhsp()->castExtendS()->lhsp())");
@@ -1348,12 +1701,11 @@ private:
 	// Default: Just iterate
 	if (m_required) {
 	    nodep->v3error("Expecting expression to be constant, but can't convert a "
-			   <<nodep->typeName()<<" to constant.");
+			   <<nodep->prettyTypeName()<<" to constant.");
 	} else {
 	    // Calculate the width of this operation
 	    if (m_params && !nodep->width()) {
-		V3Width::widthParams(nodep);
-		V3Signed::signedParams(nodep);
+		nodep = V3Width::widthParamsEdit(nodep);
 	    }
 	    nodep->iterateChildren(*this);
 	}
@@ -1361,54 +1713,72 @@ private:
 
 public:
     // CONSTUCTORS
-    ConstVisitor(bool params, bool required, bool warn, bool cpp) {
-	m_params = params; m_required = required; m_warn=warn; m_cpp=cpp;
+    ConstVisitor(bool params, bool expensive, bool warn, bool cpp) {
+	m_params = params; m_required = params;
+	m_expensive = expensive;
+	m_warn = warn;
+	m_cpp = cpp;
 	m_wremove = true;
 	m_modp = NULL;
 	m_scopep = NULL;
     }
     virtual ~ConstVisitor() {}
-    void main(AstNode* nodep) {
+    AstNode* mainAcceptEdit(AstNode* nodep) {
 	// Operate starting at a random place
-	nodep->accept(*this);
+	return nodep->acceptSubtreeReturnEdits(*this);
     }
 };
 
 //######################################################################
 // Const class functions
 
-void V3Const::constifyParam(AstNode* nodep) {
+AstNode* V3Const::constifyParamsEdit(AstNode* nodep) {
     //if (debug()>0) nodep->dumpTree(cout,"  forceConPRE : ");
-    if (!nodep->width()) {
-	V3Width::widthParams(nodep);
-	V3Signed::signedParams(nodep);
+    // Resize even if the node already has a width, because burried in the treee we may
+    // have a node we just created with signing, etc, that isn't sized yet.
+    nodep = V3Width::widthParamsEdit(nodep); // Make sure we've sized everything first
+    ConstVisitor visitor (true,false,false,false);
+    if (AstVar* varp=nodep->castVar()) {
+	// If a var wants to be constified, it's really a param, and
+	// we want the value to be constant.  We aren't passed just the
+	// init value because we need widthing above to handle the var's type.
+	if (varp->initp()) visitor.mainAcceptEdit(varp->initp());
+    } else {
+	nodep = visitor.mainAcceptEdit(nodep);
     }
-    ConstVisitor visitor (true,true,false,false);
-    visitor.main(nodep);
     // Because we do edits, nodep links may get trashed and core dump this.
     //if (debug()>0) nodep->dumpTree(cout,"  forceConDONE: ");
+    return nodep;
 }
 
 void V3Const::constifyAll(AstNetlist* nodep) {
+    // Only call from Verilator.cpp, as it uses user#'s
     UINFO(2,__FUNCTION__<<": "<<endl);
-    ConstVisitor visitor (false,false,false,false);
-    visitor.main(nodep);
+    ConstVisitor visitor (false,true,false,false);
+    (void)visitor.mainAcceptEdit(nodep);
 }
 
 void V3Const::constifyAllLint(AstNetlist* nodep) {
+    // Only call from Verilator.cpp, as it uses user#'s
     UINFO(2,__FUNCTION__<<": "<<endl);
     ConstVisitor visitor (false,false,true,false);
-    visitor.main(nodep);
+    (void)visitor.mainAcceptEdit(nodep);
 }
 
 void V3Const::constifyCpp(AstNetlist* nodep) {
     UINFO(2,__FUNCTION__<<": "<<endl);
     ConstVisitor visitor (false,false,false,true);
-    visitor.main(nodep);
+    (void)visitor.mainAcceptEdit(nodep);
 }
 
-void V3Const::constifyTree(AstNode* nodep) {
+AstNode* V3Const::constifyEdit(AstNode* nodep) {
     ConstVisitor visitor (false,false,false,false);
-    visitor.main(nodep);
+    nodep = visitor.mainAcceptEdit(nodep);
+    return nodep;
 }
 
+AstNode* V3Const::constifyExpensiveEdit(AstNode* nodep) {
+    ConstVisitor visitor (false,true,false,false);
+    nodep = visitor.mainAcceptEdit(nodep);
+    return nodep;
+}

src/V3Const.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -31,7 +32,8 @@
 class V3Const {
 public:
     // Force this cell node's parameter list to become a constant
-    static void constifyParam(AstNode* nodep);
+    // Return new node that may have replaced nodep
+    static AstNode* constifyParamsEdit(AstNode* nodep);
     // Everything that's possible
     static void constifyAll(AstNetlist* nodep);
     // Also, warn
@@ -39,7 +41,11 @@ public:
     // C++ datatypes
     static void constifyCpp(AstNetlist* nodep);
     // Only the current node and lower
-    static void constifyTree(AstNode* nodep);
+    // Return new node that may have replaced nodep
+    static AstNode* constifyEdit(AstNode* nodep);
+    // Only the current node and lower, with special SenTree optimization
+    // Return new node that may have replaced nodep
+    static AstNode* constifyExpensiveEdit(AstNode* nodep);
 };
 
 #endif // Guard

src/V3Coverage.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -38,7 +39,6 @@
 #include "V3Global.h"
 #include "V3Coverage.h"
 #include "V3Ast.h"
-#include "V3Const.h"
 
 //######################################################################
 // Coverage state, as a visitor of each AstNode
@@ -46,59 +46,198 @@
 class CoverageVisitor : public AstNVisitor {
 private:
     // TYPES
-    typedef map<FileLine*,int>	FileMap;
+    typedef map<string,int>	FileMap;
 
     // STATE
     bool	m_checkBlock;	// Should this block get covered?
     AstModule*	m_modp;		// Current module to add statement to
+    bool	m_inToggleOff;	// In function/task etc
     FileMap	m_fileps;	// Column counts for each fileline
-
-    //int debug() { return 9; }
+    string	m_beginHier;	// AstBegin hier name for user coverage points
 
     // METHODS
-    AstCoverInc* newCoverInc(FileLine* fl, const string& type, const string& comment) {
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
+    const char* varIgnoreToggle(AstVar* nodep) {
+	// Return true if this shouldn't be traced
+	// See also similar rule in V3TraceDecl::varIgnoreTrace
+	string prettyName = nodep->prettyName();
+	if (!nodep->isToggleCoverable())
+	    return "Not relevant signal type";
+	if (prettyName.c_str()[0] == '_')
+	    return "Leading underscore";
+	if (prettyName.find("._") != string::npos)
+	    return "Inlined leading underscore";
+	if ((nodep->width()*nodep->arrayElements()) > 256) return "Wide bus/array > 256 bits";
+	// We allow this, though tracing doesn't
+	// if (nodep->arrayp(1)) return "Unsupported: Multi-dimensional array";
+	return NULL;
+    }
+
+    AstCoverInc* newCoverInc(FileLine* fl, const string& hier,
+			     const string& page_prefix, const string& comment) {
+	// For line coverage, we may have multiple if's on one line, so disambiguate if
+	// everything is otherwise identical
+	// (Don't set column otherwise as it may result in making bins not match up with
+	// different types of coverage enabled.)
+	string key = fl->filename()+"\001"+cvtToStr(fl->lineno())+"\001"+hier+"\001"+page_prefix+"\001"+comment;
 	int column = 0;
-	FileMap::iterator it = m_fileps.find(fl);
+	FileMap::iterator it = m_fileps.find(key);
 	if (it == m_fileps.end()) {
-	    m_fileps.insert(make_pair(fl,column+1));
+	    m_fileps.insert(make_pair(key,column+1));
 	} else {
 	    column = (it->second)++;
 	}
 
-	AstCoverDecl* declp = new AstCoverDecl(fl, column, type, comment);
+	// We could use the basename of the filename to the page, but seems better for code
+	// from an include file to be listed under the module using it rather than the include file.
+	// Note the module name could have parameters appended, we'll consider this
+	// a feature as it allows for each parameterized block to be counted separately.
+	// Someday the user might be allowed to specify a different page suffix
+	string page = page_prefix + "/" + m_modp->prettyName();
+
+	AstCoverDecl* declp = new AstCoverDecl(fl, column, page, comment);
+	declp->hier(hier);
 	m_modp->addStmtp(declp);
 
 	return new AstCoverInc(fl, declp);
     }
 
-    // VISITORS
+    // VISITORS - BOTH
     virtual void visit(AstModule* nodep, AstNUser*) {
 	m_modp = nodep;
 	m_fileps.clear();
 	nodep->iterateChildren(*this);
 	m_modp = NULL;
     }
-    virtual void visit(AstIf* nodep, AstNUser*) {
+
+    // VISITORS - TOGGLE COVERAGE
+    virtual void visit(AstNodeFTask* nodep, AstNUser*) {
+	bool oldtog = m_inToggleOff;
+	{
+	    m_inToggleOff = true;
+	    nodep->iterateChildren(*this);
+	}
+	m_inToggleOff = oldtog;
+    }
+    virtual void visit(AstVar* nodep, AstNUser*) {
+	nodep->iterateChildren(*this);
+	if (m_modp && !m_inToggleOff
+	    && nodep->fileline()->coverageOn() && v3Global.opt.coverageToggle()) {
+	    const char* disablep = varIgnoreToggle(nodep);
+	    if (disablep) {
+		UINFO(4, "    Disable Toggle: "<<disablep<<" "<<nodep<<endl);
+	    } else {
+		UINFO(4, "    Toggle: "<<nodep<<endl);
+		// There's several overall ways to approach this
+		//    Treat like tracing, where a end-of-timestamp action sees all changes
+		//	Works ok, but would be quite slow as need to reform vectors before the calls
+		//    Convert to "always @ (posedge signal[#]) coverinc"
+		//	Would mark many signals as clocks, precluding many later optimizations
+		//    Convert to "if (x & !lastx) CoverInc"
+		//	OK, but we couldn't later detect them to schedule where the IFs get called
+		//    Convert to "AstCoverInc(CoverInc...)"
+		//	We'll do this, and make the if(...) coverinc later.
+
+		// Compute size of the problem
+		int dimensions = 0;
+		for (AstRange* arrayp=nodep->arraysp(); arrayp; arrayp = arrayp->nextp()->castRange()) {
+		    dimensions++;
+		}
+
+		// Add signal to hold the old value
+		string newvarname = (string)"__Vtogcov__"+nodep->shortName();
+		AstVar* chgVarp = new AstVar (nodep->fileline(), AstVarType::MODULETEMP, newvarname, nodep);
+		m_modp->addStmtp(chgVarp);
+
+		// Create bucket for each dimension * bit.
+		// This is necessarily an O(n^2) expansion, which is why
+		// we limit coverage to signals with < 256 bits.
+		vector<int> selects_docs;  selects_docs.resize(dimensions);
+		vector<int> selects_code;  selects_code.resize(dimensions);
+		toggleVarRecurse(nodep, chgVarp, nodep->arraysp(),
+				 0, selects_docs, selects_code );
+	    }
+	}
+    }
+
+    void toggleVarRecurse(AstVar* nodep, AstVar* chgVarp, AstRange* arrayp,
+			  int dimension, vector<int>& selects_docs, vector<int>& selects_code) {
+	if (arrayp) {
+	    for (int index=arrayp->lsbConst(); index<=arrayp->msbConst()+1; index++) {
+		// Handle the next dimension, if any
+		selects_docs[dimension] = index;
+		selects_code[dimension] = index - arrayp->lsbConst();
+		toggleVarRecurse(nodep, chgVarp, arrayp->nextp()->castRange(),
+				 dimension+1, selects_docs, selects_code);
+	    }
+	} else {  // No more arraying - just each bit in the width
+	    if (nodep->rangep()) {
+		for (int bitindex_docs=nodep->lsb(); bitindex_docs<nodep->msb()+1; bitindex_docs++) {
+		    toggleVarBottom(nodep, chgVarp,
+				    dimension, selects_docs, selects_code,
+				    true, bitindex_docs);
+		}
+	    } else {
+		toggleVarBottom(nodep, chgVarp,
+				dimension, selects_docs, selects_code,
+				false, 0);
+	    }
+	}
+    }
+    void toggleVarBottom(AstVar* nodep, AstVar* chgVarp,
+			 int dimension, vector<int>& selects_docs, vector<int>& selects_code,
+			 bool bitsel, int bitindex_docs) {
+	string comment = nodep->name();
+	AstNode* varRefp = new AstVarRef(nodep->fileline(), nodep, false);
+	AstNode* chgRefp = new AstVarRef(nodep->fileline(), chgVarp, true);
+	// Now determine the name of, and how to get to the bit of this slice
+	for (int dim=0; dim<dimension; dim++) {
+	    // Comments are strings, not symbols, so we don't need __BRA__ __KET__ 
+	    comment += "["+cvtToStr(selects_docs[dim])+"]";
+	    varRefp = new AstArraySel(nodep->fileline(), varRefp, selects_code[dim]);
+	    chgRefp = new AstArraySel(nodep->fileline(), chgRefp, selects_code[dim]);
+	}
+	if (bitsel) {
+	    comment += "["+cvtToStr(bitindex_docs)+"]";
+	    int bitindex_code = bitindex_docs - nodep->lsb();
+	    varRefp = new AstSel(nodep->fileline(), varRefp, bitindex_code, 1);
+	    chgRefp = new AstSel(nodep->fileline(), chgRefp, bitindex_code, 1);
+	}
+	AstCoverToggle* newp = new AstCoverToggle (nodep->fileline(),
+						   newCoverInc(nodep->fileline(), "", "v_toggle", comment),
+						   varRefp, chgRefp);
+	m_modp->addStmtp(newp);
+    }
+
+    // VISITORS - LINE COVERAGE
+    virtual void visit(AstIf* nodep, AstNUser*) { // Note not AstNodeIf; other types don't get covered
 	UINFO(4," IF: "<<nodep<<endl);
 	if (m_checkBlock) {
 	    nodep->ifsp()->iterateAndNext(*this);
-	    if (m_checkBlock && v3Global.opt.coverageLine()) {	// if a "if" branch didn't disable it
+	    if (m_checkBlock
+		&& nodep->fileline()->coverageOn() && v3Global.opt.coverageLine()) {	// if a "if" branch didn't disable it
 		if (!nodep->backp()->castIf()
 		    || nodep->backp()->castIf()->elsesp()!=nodep) {  // Ignore if else; did earlier
 		    UINFO(4,"   COVER: "<<nodep<<endl);
-		    nodep->addIfsp(newCoverInc(nodep->fileline(), "block", "if"));
+		    nodep->addIfsp(newCoverInc(nodep->fileline(), "", "v_line", "if"));
 		}
 	    }
 	    // Don't do empty else's, only empty if/case's
 	    if (nodep->elsesp()) {
 		m_checkBlock = true;
 		nodep->elsesp()->iterateAndNext(*this);
-		if (m_checkBlock && v3Global.opt.coverageLine()) {	// if a "else" branch didn't disable it
+		if (m_checkBlock
+		    && nodep->fileline()->coverageOn() && v3Global.opt.coverageLine()) {	// if a "else" branch didn't disable it
 		    UINFO(4,"   COVER: "<<nodep<<endl);
 		    if (nodep->elsesp()->castIf()) {
-			nodep->addElsesp(newCoverInc(nodep->elsesp()->fileline(), "block", "elsif"));
+			nodep->addElsesp(newCoverInc(nodep->elsesp()->fileline(), "", "v_line", "elsif"));
 		    } else {
-			nodep->addElsesp(newCoverInc(nodep->elsesp()->fileline(), "block", "else"));
+			nodep->addElsesp(newCoverInc(nodep->elsesp()->fileline(), "", "v_line", "else"));
 		    }
 		}
 	    }
@@ -107,22 +246,25 @@ private:
     }
     virtual void visit(AstCaseItem* nodep, AstNUser*) {
 	UINFO(4," CASEI: "<<nodep<<endl);
-	if (m_checkBlock && v3Global.opt.coverageLine()) {
+	if (m_checkBlock
+	    && nodep->fileline()->coverageOn() && v3Global.opt.coverageLine()) {
 	    nodep->bodysp()->iterateAndNext(*this);
 	    if (m_checkBlock) {	// if the case body didn't disable it
 		UINFO(4,"   COVER: "<<nodep<<endl);
-		nodep->addBodysp(newCoverInc(nodep->fileline(), "block", "case"));
+		nodep->addBodysp(newCoverInc(nodep->fileline(), "", "v_line", "case"));
 	    }
 	    m_checkBlock = true;  // Reset as a child may have cleared it
 	}
     }
     virtual void visit(AstPslCover* nodep, AstNUser*) {
 	UINFO(4," PSLCOVER: "<<nodep<<endl);
+	m_checkBlock = true;  // Always do cover blocks, even if there's a $stop
 	nodep->iterateChildren(*this);
 	if (!nodep->coverincp()) {
 	    // Note the name may be overridden by V3Assert processing
-	    nodep->coverincp(newCoverInc(nodep->fileline(), "psl_cover", "cover"));
+	    nodep->coverincp(newCoverInc(nodep->fileline(), m_beginHier, "v_user", "cover"));
 	}
+	m_checkBlock = true;  // Reset as a child may have cleared it
     }
     virtual void visit(AstStop* nodep, AstNUser*) {
 	UINFO(4,"  STOP: "<<nodep<<endl);
@@ -134,9 +276,30 @@ private:
 	    UINFO(4,"  OFF: "<<nodep<<endl);
 	    m_checkBlock = false;
 	    nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
+	} else {
+	    if (m_checkBlock) nodep->iterateChildren(*this);
 	}
-	if (m_checkBlock) nodep->iterateChildren(*this);
     }
+    virtual void visit(AstBegin* nodep, AstNUser*) {
+	// Record the hierarchy of any named begins, so we can apply to user
+	// coverage points.  This is because there may be cov points inside
+	// generate blocks; each point should get separate consideration.
+	// (Currently ignored for line coverage, since any generate iteration
+	// covers the code in that line.)
+	string oldHier = m_beginHier;
+	bool oldtog = m_inToggleOff;
+	{
+	    m_inToggleOff = true;
+	    if (nodep->name()!="") {
+		m_beginHier = m_beginHier + (m_beginHier!=""?".":"") + nodep->name();
+	    }
+	    nodep->iterateChildren(*this);
+	}
+	m_beginHier = oldHier;
+	m_inToggleOff = oldtog;
+    }
+
+    // VISITORS - BOTH
     virtual void visit(AstNode* nodep, AstNUser*) {
 	// Default: Just iterate
 	if (m_checkBlock) {
@@ -150,6 +313,8 @@ public:
     CoverageVisitor(AstNetlist* rootp) {
 	// Operate on all modules
 	m_checkBlock = true;
+	m_beginHier = "";
+	m_inToggleOff = false;
 	rootp->iterateChildren(*this);
     }
     virtual ~CoverageVisitor() {}

src/V3Coverage.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3CoverageJoin.cpp

@@ -0,0 +1,139 @@
+//*************************************************************************
+// DESCRIPTION: Verilator: Netlist (top level) functions
+//
+// Code available from: http://www.veripool.org/verilator
+//
+// AUTHORS: Wilson Snyder with Paul Wasson, Duane Gabli
+//
+//*************************************************************************
+//
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+//
+// Verilator is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+//*************************************************************************
+// COVERAGEJOIN TRANSFORMATIONS:
+//	If two COVERTOGGLEs have same VARSCOPE, combine them
+//*************************************************************************
+
+
+#include "config_build.h"
+#include "verilatedos.h"
+#include <cstdio>
+#include <cstdarg>
+#include <unistd.h>
+#include <vector>
+
+#include "V3Global.h"
+#include "V3CoverageJoin.h"
+#include "V3Hashed.h"
+#include "V3Stats.h"
+
+//######################################################################
+// CoverageJoin state, as a visitor of each AstNode
+
+class CoverageJoinVisitor : public AstNVisitor {
+private:
+    // NODE STATE
+    // V3Hashed
+    //  AstCoverToggle->VarRef::user4()	// V3Hashed calculation
+
+    //AstUser4InUse	In V3Hashed
+
+    // TYPES
+    typedef vector<AstCoverToggle*> ToggleList;
+
+    // STATE
+    ToggleList		m_toggleps;	// List of of all AstCoverToggle's
+
+    V3Double0		m_statToggleJoins;	// Statistic tracking
+
+    // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
+    void detectDuplicates() {
+	UINFO(9,"Finding duplicates\n");
+	// Note uses user4
+	V3Hashed  hashed;	// Duplicate code detection
+	// Hash all of the original signals we toggle cover
+	for (ToggleList::iterator it = m_toggleps.begin(); it != m_toggleps.end(); ++it) {
+	    AstCoverToggle* nodep = *it;
+	    hashed.hashAndInsert(nodep->origp());
+	}
+	// Find if there are any duplicates
+	for (ToggleList::iterator it = m_toggleps.begin(); it != m_toggleps.end(); ++it) {
+	    AstCoverToggle* nodep = *it;
+	    if (nodep->backp()) {   // nodep->backp() is null if we already detected it's a duplicate and unlinked it
+		// Want to choose a base node, and keep finding duplicates that are identical
+		// This prevents making chains where a->b, then c->d, then b->c, as we'll find a->b, a->c, a->d directly.
+		while (1) {
+		    V3Hashed::iterator dupit = hashed.findDuplicate(nodep->origp());
+		    if (dupit == hashed.end()) break;
+		    //
+		    AstNode* duporigp = hashed.iteratorNodep(dupit);
+		    // Note hashed will point to the original variable (what's duplicated), not the covertoggle,
+		    // but we need to get back to the covertoggle which is immediately above, so:
+		    AstCoverToggle* removep = duporigp->backp()->castCoverToggle();
+		    if (!removep) nodep->v3fatalSrc("CoverageJoin duplicate of wrong type");
+		    UINFO(8,"  Orig "<<nodep<<" -->> "<<nodep->incp()->declp()<<endl);
+		    UINFO(8,"   dup "<<removep<<" -->> "<<removep->incp()->declp()<<endl);
+		    // The CoverDecl the duplicate pointed to now needs to point to the original's data
+		    // IE the duplicate will get the coverage number from the non-duplicate
+		    AstCoverDecl* datadeclp = nodep->incp()->declp()->dataDeclThisp();
+		    removep->incp()->declp()->dataDeclp (datadeclp);
+		    UINFO(8,"   new "<<removep->incp()->declp()<<endl);
+		    // Mark the found node as a duplicate of the first node
+		    // (Not vice-versa as we have the iterator for the found node)
+		    removep->unlinkFrBack();  pushDeletep(removep); removep=NULL;
+		    // Remove node from comparison so don't hit it again
+		    hashed.erase(dupit);
+		    m_statToggleJoins++;
+		}
+	    }
+	}
+    }
+
+    // VISITORS
+    virtual void visit(AstNetlist* nodep, AstNUser*) {
+	// Find all Coverage's
+	nodep->iterateChildren(*this);
+	// Simplify
+	detectDuplicates();
+    }
+    virtual void visit(AstCoverToggle* nodep, AstNUser*) {
+	m_toggleps.push_back(nodep);
+	nodep->iterateChildren(*this);
+    }
+    //--------------------
+    virtual void visit(AstNodeMath* nodep, AstNUser*) {}  // Accelerate
+    virtual void visit(AstNode* nodep, AstNUser*) {
+	nodep->iterateChildren(*this);
+    }
+
+public:
+    // CONSTUCTORS
+    CoverageJoinVisitor(AstNetlist* nodep) {
+	nodep->accept(*this);
+    }
+    virtual ~CoverageJoinVisitor() {
+	V3Stats::addStat("Coverage, Toggle points joined", m_statToggleJoins);
+    }
+};
+
+//######################################################################
+// Coverage class functions
+
+void V3CoverageJoin::coverageJoin(AstNetlist* rootp) {
+    UINFO(2,__FUNCTION__<<": "<<endl);
+    CoverageJoinVisitor visitor (rootp);
+}

src/V3CoverageJoin.h

@@ -0,0 +1,38 @@
+// -*- C++ -*-
+//*************************************************************************
+// DESCRIPTION: Verilator: Coverage modules/signals together
+//
+// Code available from: http://www.veripool.org/verilator
+//
+// AUTHORS: Wilson Snyder with Paul Wasson, Duane Gabli
+//
+//*************************************************************************
+//
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+//
+// Verilator is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+//*************************************************************************
+
+#ifndef _V3COVERAGEJOIN_H_
+#define _V3COVERAGEJOIN_H_ 1
+#include "config_build.h"
+#include "verilatedos.h"
+#include "V3Error.h"
+#include "V3Ast.h"
+
+//============================================================================
+
+class V3CoverageJoin {
+public:
+    // CREATORS
+    static void coverageJoin(AstNetlist* rootp);
+};
+
+#endif // Guard

src/V3Dead.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -45,7 +46,7 @@ private:
     // VISITORS
     virtual void visit(AstCell* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
-	nodep->modp()->user(nodep->modp()->user() - 1);
+	nodep->modp()->user1(nodep->modp()->user1() - 1);
     }
     //-----
     virtual void visit(AstNodeMath* nodep, AstNUser*) {}  // Accelerate
@@ -70,6 +71,7 @@ private:
     //  AstModule::user()	-> int. Count of number of cells referencing this module.
     //  AstVar::user()		-> int. Count of number of references
     //  AstVarScope::user()	-> int. Count of number of references
+    AstUser1InUse	m_inuser1;
 
     // TYPES
     typedef multimap<AstVarScope*,AstNodeAssign*>	AssignMap;
@@ -80,23 +82,27 @@ private:
     AssignMap			m_assignMap;	// List of all simple assignments for each variable
     bool			m_elimUserVars;	// Allow removal of user's vars
     bool			m_sideEffect;	// Side effects discovered in assign RHS
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
 
     // VISITORS
     virtual void visit(AstCell* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
-	nodep->modp()->user(nodep->modp()->user() + 1);
+	nodep->modp()->user1(nodep->modp()->user1() + 1);
     }
     virtual void visit(AstNodeVarRef* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
 	if (nodep->varScopep()) {
-	    nodep->varScopep()->user(nodep->varScopep()->user() + 1);
-	    nodep->varScopep()->varp()->user(nodep->varScopep()->varp()->user() + 1);
+	    nodep->varScopep()->user1(nodep->varScopep()->user1() + 1);
+	    nodep->varScopep()->varp()->user1(nodep->varScopep()->varp()->user1() + 1);
 	}
 	if (nodep->varp()) {
-	    nodep->varp()->user(nodep->varp()->user() + 1);
+	    nodep->varp()->user1(nodep->varp()->user1() + 1);
 	}
     }
     virtual void visit(AstVarScope* nodep, AstNUser*) {
@@ -142,7 +148,7 @@ private:
 	    AstModule* nextmodp;
 	    for (AstModule* modp = v3Global.rootp()->modulesp(); modp; modp=nextmodp) {
 		nextmodp = modp->nextp()->castModule();
-		if (modp->level()>2	&& modp->user()==0) {
+		if (modp->level()>2	&& modp->user1()==0) {
 		    // > 2 because L1 is the wrapper, L2 is the top user module
 		    UINFO(4,"  Dead module "<<modp<<endl);
 		    // And its children may now be killable too; correct counts
@@ -163,7 +169,7 @@ private:
 	// Delete any unused varscopes
 	for (vector<AstVarScope*>::iterator it = m_vscsp.begin(); it!=m_vscsp.end(); ++it) {
 	    AstVarScope* vscp = *it;
-	    if (vscp->user() == 0 && canElim(vscp->varp())) {
+	    if (vscp->user1() == 0 && canElim(vscp->varp())) {
 		UINFO(4,"  Dead "<<vscp<<endl);
 		pair <AssignMap::iterator,AssignMap::iterator> eqrange = m_assignMap.equal_range(vscp);
 		for (AssignMap::iterator it = eqrange.first; it != eqrange.second; ++it) {
@@ -175,7 +181,7 @@ private:
 	    }
 	}
 	for (vector<AstVar*>::iterator it = m_varsp.begin(); it!=m_varsp.end(); ++it) {
-	    if ((*it)->user() == 0 && canElim((*it))) {
+	    if ((*it)->user1() == 0 && canElim((*it))) {
 		UINFO(4,"  Dead "<<(*it)<<endl);
 		(*it)->unlinkFrBack()->deleteTree(); (*it)=NULL;
 	    }
@@ -188,7 +194,6 @@ public:
 	m_elimUserVars = elimUserVars;
 	m_sideEffect = false;
 	// Operate on whole netlist
-	AstNode::userClearTree();	// userp() used on entire tree
 	nodep->accept(*this);
 	deadCheckVar();
 	// Modules after vars, because might be vars we delete inside a mod we delete

src/V3Dead.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Delayed.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -72,17 +73,21 @@ class DelayedVisitor : public AstNVisitor {
 private:
     // NODE STATE
     // Cleared each module:
-    //  AstVarScope::userp()	-> AstVarScope*.  Points to temp var created.
+    //  AstVarScope::user1p()	-> AstVarScope*.  Points to temp var created.
     //  AstVarScope::user2p()	-> AstActive*.  Points to activity block of signal
     //  AstVarScope::user4p()	-> AstAlwaysPost*.  Post block for this variable
+    //  AstVar::user1()		-> VarUsage. Tracks delayed vs non-delayed usage
     //  AstVar::user2()		-> bool.  Set true if already made warning
-    //  AstVar::user3()		-> VarUsage. Tracks delayed vs non-delayed usage
     //  AstVar::user4()		-> int.   Vector number, for assignment creation
     //  AstVarRef::user2()	-> bool.  Set true if already processed
     //  AstAlwaysPost::user4()	-> AstIf*.  Last IF (__Vdlyvset__) created under this AlwaysPost
     // Cleared each scope:
-    //  AstAssignDly::user5()	-> AstVarScope*.  __Vdlyvset__ created for this assign
-    //  AstAlwaysPost::user5()	-> AstVarScope*.  __Vdlyvset__ last referenced in IF
+    //  AstAssignDly::user3()	-> AstVarScope*.  __Vdlyvset__ created for this assign
+    //  AstAlwaysPost::user3()	-> AstVarScope*.  __Vdlyvset__ last referenced in IF
+    AstUser1InUse	m_inuser1;
+    AstUser2InUse	m_inuser2;
+    AstUser3InUse	m_inuser3;
+    AstUser4InUse	m_inuser4;
 
     enum VarUsage { VU_NONE=0, VU_DLY=1, VU_NONDLY=2 };
 
@@ -97,13 +102,18 @@ private:
     VarMap		m_modVarMap;	// Table of new var names created under module
     V3Double0		m_statSharedSet;// Statistic tracking
 
-    //static int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     void markVarUsage(AstVar* nodep, uint32_t flags) {
 	//UINFO(4," MVU "<<flags<<" "<<nodep<<endl);
-	nodep->user3( nodep->user3() | flags );
-	if ((nodep->user3() & VU_DLY) && (nodep->user3() & VU_NONDLY)) {
+	nodep->user1( nodep->user1() | flags );
+	if ((nodep->user1() & VU_DLY) && (nodep->user1() & VU_NONDLY)) {
 	    nodep->v3warn(BLKANDNBLK,"Unsupported: Blocked and non-blocking assignments to same variable: "<<nodep->prettyName());
 	}
     }
@@ -179,7 +189,7 @@ private:
 		dimreadps.push_front(dimp);
 	    } else {
 		string bitvarname = (string("__Vdlyvdim")+cvtToStr(dimension)
-				     +"__"+oldvarp->shortName()+"__"+cvtToStr(modVecNum));
+				     +"__"+oldvarp->shortName()+"__v"+cvtToStr(modVecNum));
 		AstVarScope* bitvscp = createVarSc(varrefp->varScopep(), bitvarname, dimp->width());
 		AstAssign* bitassignp
 		    = new AstAssign (nodep->fileline(),
@@ -197,7 +207,7 @@ private:
 	    if (bitselp->fromp()->castConst()) {// vlsb = constant, can just push constant into where we use it
 		bitreadp = lsbvaluep;
 	    } else {
-		string bitvarname = (string("__Vdlyvlsb__")+oldvarp->shortName()+"__"+cvtToStr(modVecNum));
+		string bitvarname = (string("__Vdlyvlsb__")+oldvarp->shortName()+"__v"+cvtToStr(modVecNum));
 		AstVarScope* bitvscp = createVarSc(varrefp->varScopep(), bitvarname, lsbvaluep->width());
 		AstAssign* bitassignp = new AstAssign (nodep->fileline(),
 						       new AstVarRef(nodep->fileline(), bitvscp, true),
@@ -212,7 +222,7 @@ private:
 	if (nodep->rhsp()->castConst()) {	// vval = constant, can just push constant into where we use it
 	    valreadp = nodep->rhsp()->unlinkFrBack();
 	} else {
-	    string valvarname = (string("__Vdlyvval__")+oldvarp->shortName()+"__"+cvtToStr(modVecNum));
+	    string valvarname = (string("__Vdlyvval__")+oldvarp->shortName()+"__v"+cvtToStr(modVecNum));
 	    AstVarScope* valvscp = createVarSc(varrefp->varScopep(), valvarname, nodep->rhsp()->width());
 	    newlhsp = new AstVarRef(nodep->fileline(), valvscp, true);
 	    valreadp = new AstVarRef(nodep->fileline(), valvscp, false);
@@ -222,16 +232,16 @@ private:
 	bool sharedVset = false;
 	AstVarScope* setvscp;
 
-	if (nodep->user5p()) {
+	if (nodep->user3p()) {
 	    // Simplistic optimization.  If the previous statement in same scope was also a =>,
-	    // then we told this nodep->user5 we can use its Vdlyvset rather than making a new one.
+	    // then we told this nodep->user3 we can use its Vdlyvset rather than making a new one.
 	    // This is good for code like:
 	    //    for (i=0; i<5; i++)  vector[i] <= something;
 	    sharedVset = true;
-	    setvscp = nodep->user5p()->castNode()->castVarScope();
+	    setvscp = nodep->user3p()->castNode()->castVarScope();
 	    m_statSharedSet++;
 	} else {  // Create new one
-	    string setvarname = (string("__Vdlyvset__")+oldvarp->shortName()+"__"+cvtToStr(modVecNum));
+	    string setvarname = (string("__Vdlyvset__")+oldvarp->shortName()+"__v"+cvtToStr(modVecNum));
 	    setvscp = createVarSc(varrefp->varScopep(), setvarname, 1);
 	    AstAssignPre* setinitp
 		= new AstAssignPre (nodep->fileline(),
@@ -246,7 +256,7 @@ private:
 	    nodep->addNextHere(setassignp);
 	}
 	if (m_nextDlyp) {  // Tell next assigndly it can share the variable
-	    m_nextDlyp->user5p(setvscp);
+	    m_nextDlyp->user3p(setvscp);
 	}
 	//
 	// Create ALWAYSPOST for delayed variable
@@ -273,7 +283,7 @@ private:
 	    varrefp->varScopep()->user4p(finalp);
 	}
 	AstIf* postLogicp;
-	if (finalp->user5p()->castNode() == setvscp) {
+	if (finalp->user3p()->castNode() == setvscp) {
 	    // Optimize as above; if sharing Vdlyvset *ON SAME VARIABLE*,
 	    // we can share the IF statement too
 	    postLogicp = finalp->user4p()->castNode()->castIf();
@@ -285,7 +295,7 @@ private:
 				    NULL);
 	    UINFO(9,"     Created "<<postLogicp<<endl);
 	    finalp->addBodysp(postLogicp);
-	    finalp->user5p(setvscp);	// Remember IF's vset variable
+	    finalp->user3p(setvscp);	// Remember IF's vset variable
 	    finalp->user4p(postLogicp);	// and the associated IF, as we may be able to reuse it
 	}
 	postLogicp->addIfsp(new AstAssign(nodep->fileline(), selectsp, valreadp));
@@ -297,15 +307,11 @@ private:
     virtual void visit(AstNetlist* nodep, AstNUser*) {
 	//VV*****  We reset all userp() on the netlist
 	m_modVarMap.clear();
-	AstNode::userClearTree();
-	AstNode::user2ClearTree();
-	AstNode::user3ClearTree();
-	AstNode::user4ClearTree();
 	nodep->iterateChildren(*this);
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	UINFO(4," MOD   "<<nodep<<endl);
-	AstNode::user5ClearTree();
+	AstNode::user3ClearTree();
 	nodep->iterateChildren(*this);
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
@@ -329,7 +335,7 @@ private:
 		&& nodep->lhsp()->castSel()->fromp()->castArraySel())) {
 	    AstNode* lhsp = nodep->lhsp()->unlinkFrBack();
 	    AstNode* newlhsp = createDlyArray(nodep, lhsp);
-	    if (m_inLoop) nodep->v3error("Unsupported: Delayed assignment to array inside for loops (non-delayed is ok - see docs)");
+	    if (m_inLoop) nodep->v3warn(BLKLOOPINIT,"Unsupported: Delayed assignment to array inside for loops (non-delayed is ok - see docs)");
 	    if (newlhsp) {
 		nodep->lhsp(newlhsp);
 	    } else {
@@ -354,7 +360,7 @@ private:
 		if (!m_activep->hasClocked()) nodep->v3error("Internal: Blocking <= assignment in non-clocked block, should have converted in V3Active");
 		AstVarScope* oldvscp = nodep->varScopep();
 		if (!oldvscp) nodep->v3fatalSrc("Var didn't get varscoped in V3Scope.cpp\n");
-		AstVarScope* dlyvscp = oldvscp->userp()->castNode()->castVarScope();
+		AstVarScope* dlyvscp = oldvscp->user1p()->castNode()->castVarScope();
 		if (dlyvscp) {  // Multiple use of delayed variable
 		    AstActive* oldactivep = dlyvscp->user2p()->castNode()->castActive();
 		    if (!oldactivep) nodep->v3fatalSrc("<= old dly assignment not put under sensitivity block");
@@ -370,8 +376,8 @@ private:
 			UINFO(4,"  Act: "<<m_activep<<endl);
 			UINFO(4,"  Act: "<<oldactivep<<endl);
 			// Make a new sensitivity list, which is the combination of both blocks
-			AstSenItem* sena = m_activep->sensesp()->sensesp()->cloneTree(true)->castSenItem();
-			AstSenItem* senb = oldactivep->sensesp()->sensesp()->cloneTree(true)->castSenItem();
+			AstNodeSenItem* sena = m_activep->sensesp()->sensesp()->cloneTree(true);
+			AstNodeSenItem* senb = oldactivep->sensesp()->sensesp()->cloneTree(true);
 			AstSenTree* treep = new AstSenTree(m_activep->fileline(), sena);
 			if (senb) treep->addSensesp(senb);
 			if (AstSenTree* storep = oldactivep->sensesStorep()) {
@@ -394,7 +400,7 @@ private:
 					     new AstVarRef(nodep->fileline(), oldvscp, true),
 					     new AstVarRef(nodep->fileline(), dlyvscp, false));
 		    postp->lhsp()->user2(true);	// Don't detect this assignment
-		    oldvscp->userp(dlyvscp);  // So we can find it later
+		    oldvscp->user1p(dlyvscp);  // So we can find it later
 		    // Make new ACTIVE with identical sensitivity tree
 		    AstActive* newactp = new AstActive (nodep->fileline(), "sequentdly",
 							m_activep->sensesp());
@@ -410,6 +416,7 @@ private:
 	    else if (!m_inDly && nodep->lvalue()) {
 		//UINFO(9,"NBA "<<nodep<<endl);
 		if (!m_inInitial) {
+		    UINFO(4,"AssignNDlyVar: "<<nodep<<endl);
 		    markVarUsage(nodep->varp(), VU_NONDLY);
 		}
 	    }
@@ -417,7 +424,7 @@ private:
     }
 
     virtual void visit(AstNodeFor* nodep, AstNUser*) {
-	nodep->v3fatalSrc("For statements should have been converted to while statements in V3Unroll\n");
+	nodep->v3fatalSrc("For statements should have been converted to while statements in V3Begin\n");
     }
     virtual void visit(AstWhile* nodep, AstNUser*) {
 	bool oldloop = m_inLoop;
@@ -434,7 +441,7 @@ private:
 
 public:
     // CONSTUCTORS
-    DelayedVisitor(AstNode* nodep) {
+    DelayedVisitor(AstNetlist* nodep) {
 	m_inDly = false;
 	m_activep=NULL;
 	m_cfuncp=NULL;

src/V3Delayed.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Depth.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -51,14 +52,18 @@ private:
     int			m_depth;	// How deep in an expression
     int			m_maxdepth;	// Maximum depth in an expression
 
-    //int debug() { return 9; }
-
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     void createDeepTemp(AstNode* nodep) {
 	UINFO(6,"  Deep  "<<nodep<<endl);
 	//if (debug()>=9) nodep->dumpTree(cout,"deep:");
 
-	string newvarname = ((string)"__Vdeeptemp__"+cvtToStr(m_modp->varNumGetInc()));
+	string newvarname = ((string)"__Vdeeptemp"+cvtToStr(m_modp->varNumGetInc()));
 	AstVar* varp = new AstVar (nodep->fileline(), AstVarType::STMTTEMP, newvarname,
 				   // Width, not widthMin, as we may be in middle of BITSEL expression which
 				   // though it's one bit wide, needs the mask in the upper bits.
@@ -85,6 +90,7 @@ private:
 	m_modp = nodep;
 	m_funcp = NULL;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
 	m_funcp = nodep;
@@ -132,11 +138,6 @@ private:
 	    m_funcp->isStatic(false);
 	}
     }
-    virtual void visit(AstCoverInc* nodep, AstNUser*) {
-	// OPTIMIZE: For now this needs this->__Vcoverage, but could be globalized
-	needNonStaticFunc(nodep);
-	visitStmt(nodep);
-    }
     virtual void visit(AstUCFunc* nodep, AstNUser*) {
 	needNonStaticFunc(nodep);
 	nodep->iterateChildren(*this);
@@ -155,14 +156,13 @@ private:
 
 public:
     // CONSTUCTORS
-    DepthVisitor(AstNode* nodep) {
+    DepthVisitor(AstNetlist* nodep) {
 	m_modp=NULL;
 	m_funcp=NULL;
 	m_stmtp=NULL;
 	m_depth=0;
 	m_maxdepth=0;
 	//
-	AstNode::userClearTree();	// userp() used on entire tree
 	nodep->accept(*this);
     }
     virtual ~DepthVisitor() {}

src/V3Depth.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3DepthBlock.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -48,9 +49,13 @@ private:
     int			m_depth;	// How deep in an expression
     int			m_deepNum;	// How many functions made
 
-    //int debug() { return 9; }
-
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     AstCFunc* createDeepFunc(AstNode* nodep) {
 	AstNRelinker relinkHandle;
 	nodep->unlinkFrBack(&relinkHandle);
@@ -77,6 +82,7 @@ private:
 	m_modp = nodep;
 	m_deepNum = 0;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
 	// We recurse into this.
@@ -120,7 +126,7 @@ private:
 
 public:
     // CONSTUCTORS
-    DepthBlockVisitor(AstNode* nodep) {
+    DepthBlockVisitor(AstNetlist* nodep) {
 	m_modp=NULL;
 	m_depth=0;
 	//

src/V3DepthBlock.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Descope.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -45,6 +46,7 @@ private:
     // NODE STATE
     //  Cleared entire netlist
     //   AstCFunc::user()		// bool.  Indicates processing completed
+    AstUser1InUse	m_inuser1;
 
     // TYPES
     typedef multimap<string,AstCFunc*>	FuncMmap;
@@ -54,9 +56,14 @@ private:
     AstScope*		m_scopep;	// Current scope
     bool		m_needThis;	// Add thisp to function
     FuncMmap		m_modFuncs;	// Name of public functions added
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     string descopedName(AstScope* scopep, bool& hierThisr, AstVar* varp=NULL) {
 	UASSERT(scopep, "Var/Func not scoped\n");
 	hierThisr = true;
@@ -106,7 +113,7 @@ private:
 	    if (moreOfSame1) {
 		// Multiple functions under this name, need a wrapper function
 		UINFO(6,"  Wrapping "<<name<<" multifuncs\n");
-		AstCFunc* newfuncp = topFuncp->cloneTree(false)->castCFunc();
+		AstCFunc* newfuncp = topFuncp->cloneTree(false);
 		if (newfuncp->initsp())  newfuncp->initsp()->unlinkFrBackWithNext()->deleteTree();
 		if (newfuncp->stmtsp())  newfuncp->stmtsp()->unlinkFrBackWithNext()->deleteTree();
 		if (newfuncp->finalsp()) newfuncp->finalsp()->unlinkFrBackWithNext()->deleteTree();
@@ -177,6 +184,7 @@ private:
 	m_modFuncs.clear();
 	nodep->iterateChildren(*this);
 	makePublicFuncWrappers();
+	m_modp = NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	m_scopep = nodep;
@@ -209,10 +217,10 @@ private:
 	// nodep->funcp()->scopep(NULL);
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
-	if (!nodep->user()) {
+	if (!nodep->user1()) {
 	    m_needThis = false;
 	    nodep->iterateChildren(*this);
-	    nodep->user(true);
+	    nodep->user1(true);
 	    if (m_needThis) {
 		nodep->v3fatalSrc("old code");
 		// Really we should have more node types for backend optimization of this stuff
@@ -244,7 +252,6 @@ public:
 	m_modp = NULL;
 	m_scopep = NULL;
 	m_needThis = false;
-	AstNode::userClearTree();
 	nodep->accept(*this);
     }
     virtual ~DescopeVisitor() {}

src/V3Descope.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3EmitC.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -34,36 +35,6 @@
 
 #define VL_VALUE_STRING_MAX_WIDTH 1024	// We use a static char array in VL_VALUE_STRING
 
-//######################################################################
-// Coverage ID tracking
-
-class EmitCoverIds {
-    // TYPES
-    typedef map<AstCoverDecl*,int> CoverIdMap;
-    // MEMBERS
-    CoverIdMap	m_coverIds;	// Remapping of coverage IDs to per-module value
-    int		m_coverIdsSize;	// Size of m_coverIds (to avoid O(n^2) insert)
-    // METHODS
-public:
-    void clear() {
-	m_coverIds.clear();
-	m_coverIdsSize = 0;
-    }
-    int size() const { return m_coverIdsSize; }
-    int remap(AstCoverDecl* declp) {
-	// Make cover ID for this point, unique on this module
-	CoverIdMap::iterator it = m_coverIds.find(declp);
-	if (it == m_coverIds.end()) {
-	    m_coverIds.insert(make_pair(declp,m_coverIdsSize++));	// Remapping of coverage IDs to per-module value
-	    return m_coverIdsSize-1;
-	} else {
-	    return it->second;
-	}
-    }
-    EmitCoverIds() : m_coverIdsSize(0) {}
-    ~EmitCoverIds() {}
-};
-
 //######################################################################
 // Emit statements and math operators
 
@@ -72,10 +43,24 @@ private:
     bool	m_suppressSemi;
     AstVarRef*	m_wideTempRefp;		// Variable that _WW macros should be setting
     vector<AstVar*>		m_ctorVarsVec;		// All variables in constructor order
+    int		m_splitSize;	// # of cfunc nodes placed into output file
+    int		m_splitFilenum;	// File number being created, 0 = primary
+
 public:
-    EmitCoverIds m_coverIds;	// Coverage ID remapping
-public:
-    //int debug() { return 9; }
+    // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
+    // ACCESSORS
+    int	splitFilenum() { return m_splitFilenum; }
+    int	splitFilenumInc() { m_splitSize = 0; return ++m_splitFilenum; }
+    int splitSize() { return m_splitSize; }
+    void splitSizeInc(AstNode* nodep) { m_splitSize += EmitCBaseCounterVisitor(nodep).count(); }
+    bool splitNeeded() { return (splitSize() && v3Global.opt.outputSplit() > 1
+				 && v3Global.opt.outputSplit() < splitSize()); }
 
     // METHODS
     void displayNode(AstNode* nodep, const string& vformat, AstNode* exprsp, bool isScan);
@@ -91,6 +76,9 @@ public:
     void emitIQW(AstNode* nodep) {
 	puts (nodep->isWide()?"W":(nodep->isQuad()?"Q":"I"));
     }
+    void emitScIQW(AstVar* nodep) {
+	puts (nodep->isScBv()?"SW":(nodep->isScQuad()?"SQ":"SI"));
+    }
     void emitOpName(AstNode* nodep, const string& format,
 		    AstNode* lhsp, AstNode* rhsp, AstNode* thsp);
 
@@ -146,8 +134,7 @@ public:
 	} else if (nodep->lhsp()->castVarRef()
 		   && nodep->lhsp()->castVarRef()->varp()->isSc()) {
 	    putbs("VL_ASSIGN_"); 	// Set a systemC variable
-	    if (nodep->lhsp()->castVarRef()->varp()->isScQuad()) puts("SQ");
-	    else  puts("S");
+	    emitScIQW(nodep->lhsp()->castVarRef()->varp());
 	    emitIQW(nodep);
 	    puts("(");
 	    puts(cvtToStr(nodep->widthMin())+",");
@@ -156,8 +143,8 @@ public:
 		   && nodep->rhsp()->castVarRef()->varp()->isSc()) {
 	    putbs("VL_ASSIGN_"); 	// Get a systemC variable
 	    emitIQW(nodep);
-	    if (nodep->rhsp()->castVarRef()->varp()->isScQuad()) puts("SQ(");
-	    else puts("S(");
+	    emitScIQW(nodep->rhsp()->castVarRef()->varp());
+	    puts("(");
 	    puts(cvtToStr(nodep->widthMin())+",");
 	    nodep->lhsp()->iterateAndNext(*this); puts(", ");
 	} else if (nodep->isWide()
@@ -212,19 +199,26 @@ public:
     }
     virtual void visit(AstCoverDecl* nodep, AstNUser*) {
 	puts("__vlCoverInsert(");	// As Declared in emitCoverageDecl
-	puts("&__Vcoverage[");
-	puts(cvtToStr(m_coverIds.remap(nodep))); puts("]");
-	puts(", \"");	puts(nodep->fileline()->filebasename()); puts("\"");
+	puts("&(vlSymsp->__Vcoverage[");
+	puts(cvtToStr(nodep->dataDeclThisp()->binNum())); puts("])");
+	// If this isn't the first instantiation of this module under this
+	// design, don't really count the bucket, and rely on SystemPerl to
+	// aggregate counts.  This is because Verilator combines all
+	// hiearchies itself, and if SystemPerl also did it, you'd end up
+	// with (number-of-instant) times too many counts in this bin.
+	puts(", first");  // Enable, passed from __Vconfigure parameter
+	puts(", ");	putsQuoted(nodep->fileline()->filename());
 	puts(", ");	puts(cvtToStr(nodep->fileline()->lineno()));
 	puts(", ");	puts(cvtToStr(nodep->column()));
-	puts(", \"");	puts(nodep->hier()); puts("\"");
-	puts(", \"");	puts(nodep->typeText()); puts("\"");
-	puts(", \"");	puts(nodep->comment()); puts("\"");
+	puts(", ");	putsQuoted((nodep->hier()!=""?".":"")+nodep->hier());
+	puts(", ");	putsQuoted(nodep->page());
+	puts(", ");	putsQuoted(nodep->comment());
 	puts(");\n");
     }
     virtual void visit(AstCoverInc* nodep, AstNUser*) {
-	puts("++this->__Vcoverage[");
-	puts(cvtToStr(m_coverIds.remap(nodep->declp()))); puts("];\n");
+	puts("++(vlSymsp->__Vcoverage[");
+	puts(cvtToStr(nodep->declp()->dataDeclThisp()->binNum()));
+	puts("]);\n");
     }
     virtual void visit(AstCReturn* nodep, AstNUser*) {
 	puts("return (");
@@ -233,7 +227,7 @@ public:
     }
     virtual void visit(AstDisplay* nodep, AstNUser*) {
 	string text = nodep->text();
-	if (nodep->addNewline()) text += "\\n";
+	if (nodep->addNewline()) text += "\n";
 	displayNode(nodep, text, nodep->exprsp(), false);
     }
     virtual void visit(AstFScanF* nodep, AstNUser*) {
@@ -242,6 +236,10 @@ public:
     virtual void visit(AstSScanF* nodep, AstNUser*) {
 	displayNode(nodep, nodep->text(), nodep->exprsp(), true);
     }
+    virtual void visit(AstFGetS* nodep, AstNUser*) {
+	checkMaxWords(nodep);
+	emitOpName(nodep, nodep->emitC(), nodep->lhsp(), nodep->rhsp(), NULL);
+    }
 
     void checkMaxWords(AstNode* nodep) {
 	if (nodep->widthWords() > VL_TO_STRING_MAX_WORDS) {
@@ -341,16 +339,16 @@ public:
 	puts("}\n");
     }
     virtual void visit(AstStop* nodep, AstNUser*) {
-	puts("vl_stop(\"");
-	puts(nodep->fileline()->filename());
-	puts("\",");
+	puts("vl_stop(");
+	putsQuoted(nodep->fileline()->filename());
+	puts(",");
 	puts(cvtToStr(nodep->fileline()->lineno()));
 	puts(",\"\");\n");
     }
     virtual void visit(AstFinish* nodep, AstNUser*) {
-	puts("vl_finish(\"");
-	puts(nodep->fileline()->filename());
-	puts("\",");
+	puts("vl_finish(");
+	putsQuoted(nodep->fileline()->filename());
+	puts(",");
 	puts(cvtToStr(nodep->fileline()->lineno()));
 	puts(",\"\");\n");
     }
@@ -480,9 +478,10 @@ public:
 		assigntop->iterateAndNext(*this);
 	    }
 	    for (int word=VL_WORDS_I(nodep->num().minWidth())-1; word>0; word--) {
-		ofp()->printf(",0x%08x", nodep->num().dataWord(word));
+		// Only 32 bits - llx + long long here just to appease CPP format warning
+		ofp()->printf(",0x%08llx", (long long)(nodep->num().dataWord(word)));
 	    }
-	    ofp()->printf(",0x%08x)", nodep->num().dataWord(0));
+	    ofp()->printf(",0x%08llx)", (long long)(nodep->num().dataWord(0)));
 	} else if (nodep->isQuad()) {
 	    vluint64_t num = nodep->toUQuad();
 	    if (num<10) ofp()->printf("VL_ULL(%lld)", (long long)num);
@@ -490,7 +489,7 @@ public:
 	} else {
 	    uint32_t num = nodep->toUInt();
 	    if (num<10) puts(cvtToStr(num));
-	    else ofp()->printf("0x%x", num);
+	    else ofp()->printf("0x%llx", (long long)num);
 	    //Unneeded-Causes %lx format warnings:
 	    //  if (!nodep->num().isSigned() && (num & (1UL<<31))) puts("U");
 	}
@@ -529,15 +528,17 @@ public:
     virtual void visit(AstTraceInc*, AstNUser*) {}	// Handled outside the Visit class
     // Default
     virtual void visit(AstNode* nodep, AstNUser*) {
-	puts((string)"\n???? // "+nodep->typeName()+"\n");
+	puts((string)"\n???? // "+nodep->prettyTypeName()+"\n");
 	nodep->iterateChildren(*this);
-	nodep->v3fatalSrc("Unknown node type reached emitter: "<<nodep->typeName());
+	nodep->v3fatalSrc("Unknown node type reached emitter: "<<nodep->prettyTypeName());
     }
 
 public:
     EmitCStmts() {
 	m_suppressSemi = false;
 	m_wideTempRefp = NULL;
+	m_splitSize = 0;
+	m_splitFilenum = 0;
     }
     virtual ~EmitCStmts() {}
 };
@@ -551,8 +552,6 @@ class EmitCImp : EmitCStmts {
     vector<AstChangeDet*>	m_blkChangeDetVec;	// All encountered changes in block
     bool	m_slow;		// Creating __Slow file
     bool	m_fast;		// Creating non __Slow file (or both)
-    int		m_splitSize;	// # of cfunc nodes placed into output file
-    int		m_splitFilenum;	// File number being created, 0 = primary
 
     //---------------------------------------
     // METHODS
@@ -624,16 +623,14 @@ class EmitCImp : EmitCStmts {
     //---------------------------------------
     // VISITORS
     virtual void visit(AstCFunc* nodep, AstNUser*) {
-	if (nodep->funcType() == AstCFuncType::TRACE_INIT
-	    || nodep->funcType() == AstCFuncType::TRACE_FULL
-	    || nodep->funcType() == AstCFuncType::TRACE_CHANGE) {
-	    return;  // Handled specially
+	if (nodep->funcType().isTrace()) {
+	    return;  // TRACE_* handled specially
 	}
 	if (!(nodep->slow() ? m_slow : m_fast)) return;
 
 	m_blkChangeDetVec.clear();
 
-	m_splitSize += EmitCBaseCounterVisitor(nodep).count();
+	splitSizeInc(nodep);
 
 	puts("\n");
 	puts(nodep->rtnTypeVoid()); puts(" ");
@@ -707,7 +704,7 @@ class EmitCImp : EmitCStmts {
 			varname = ": "+nodep->lhsp()->castVarRef()->varp()->prettyName();
 		    }
 		    puts(")) cout<<\"\tCHANGE: "+nodep->fileline()->ascii()
-			 +varname+"\"<<endl; );");
+			 +varname+"\"<<endl; );\n");
 		}
 	    }
 	}
@@ -735,7 +732,6 @@ class EmitCImp : EmitCStmts {
     void emitIntFuncDecls(AstModule* modp);
     // High level
     void emitImp(AstModule* modp);
-    void emitImpBottom(AstModule* modp);
     void emitStaticDecl(AstModule* modp);
     void emitWrapEval(AstModule* modp);
     void emitInt(AstModule* modp);
@@ -744,15 +740,12 @@ class EmitCImp : EmitCStmts {
 public:
     EmitCImp() {
 	m_modp = NULL;
-	m_splitSize = 0;
-	m_splitFilenum = 0;
     }
     virtual ~EmitCImp() {}
     void main(AstModule* modp, bool slow, bool fast);
     void mainDoFunc(AstCFunc* nodep) {
 	nodep->accept(*this);
     }
-    int splitSize() { return m_splitSize; }
 };
 
 //######################################################################
@@ -837,8 +830,8 @@ void EmitCStmts::emitVarCtors() {
 	}
 	else puts(", ");
 	if (ofp()->exceededWidth()) puts("\n  ");
-	puts((*it)->name()); puts("(\"");
-	puts((*it)->name()); puts("\")");
+	puts((*it)->name());
+	puts("("); putsQuoted((*it)->name()); puts(")");
     }
     if (!first) puts ("\n#endif\n");
     ofp()->indentDec();
@@ -1001,9 +994,7 @@ void EmitCStmts::displayEmit(AstNode* nodep, bool isScan) {
 	    isStmt = true;
 	    nodep->v3fatalSrc("Unknown displayEmit node type");
 	}
-	puts("\"");
-	ofp()->putsNoTracking(emitDispState.m_format);
-	puts("\"");
+	ofp()->putsQuoted(emitDispState.m_format);
 	// Arguments
 	for (unsigned i=0; i < emitDispState.m_argsp.size(); i++) {
 	    puts(",");
@@ -1213,19 +1204,11 @@ void EmitCImp::emitVarResets(AstModule* modp) {
 }
 
 void EmitCImp::emitCoverageDecl(AstModule* modp) {
-    m_coverIds.clear();
-    for (AstNode* nodep=modp->stmtsp(); nodep; nodep = nodep->nextp()) {
-	if (AstCoverDecl* declp = nodep->castCoverDecl()) {
-	    m_coverIds.remap(declp);
-	}
-    }
-    if (m_coverIds.size()) {
+    if (v3Global.opt.coverage()) {
 	ofp()->putsPrivate(true);
 	puts("// Coverage\n");
-	puts("SpZeroed<uint32_t>\t__Vcoverage["); puts(cvtToStr(m_coverIds.size())); puts("];\n");
-	ofp()->putAlign(V3OutFile::AL_AUTO, sizeof(uint32_t)*m_coverIds.size());
-	puts("void __vlCoverInsert(SpZeroed<uint32_t>* countp, const char* filename, int lineno, int column,\n");
-	puts(  	"const char* hier, const char* type, const char* comment);\n");
+	puts("void __vlCoverInsert(uint32_t* countp, bool enable, const char* filenamep, int lineno, int column,\n");
+	puts(  	"const char* hierp, const char* pagep, const char* commentp);\n");
     }
 }
 
@@ -1250,8 +1233,9 @@ void EmitCImp::emitCtorImp(AstModule* modp) {
 }
 
 void EmitCImp::emitConfigureImp(AstModule* modp) {
-    puts("\nvoid "+modClassName(modp)+"::__Vconfigure("+symClassName()+"* symsp) {\n");
-    puts(   "__VlSymsp = symsp;\n");  // First, as later stuff needs it.
+    puts("\nvoid "+modClassName(modp)+"::__Vconfigure("+symClassName()+"* vlSymsp, bool first) {\n");
+    puts(   "if (0 && first) {}  // Prevent unused\n");
+    puts(   "this->__VlSymsp = vlSymsp;\n");  // First, as later stuff needs it.
     bool first=true;
     for (AstNode* nodep=modp->stmtsp(); nodep; nodep = nodep->nextp()) {
 	if (nodep->castCoverDecl()) {
@@ -1266,20 +1250,25 @@ void EmitCImp::emitConfigureImp(AstModule* modp) {
 }
 
 void EmitCImp::emitCoverageImp(AstModule* modp) {
-    if (m_coverIds.size()) {
+    if (v3Global.opt.coverage() ) {
 	puts("\n// Coverage\n");
 	// Rather than putting out SP_COVER_INSERT calls directly, we do it via this function
 	// This gets around gcc slowness constructing all of the template arguments
-	puts("void "+modClassName(m_modp)+"::__vlCoverInsert(SpZeroed<uint32_t>* countp, const char* filename, int lineno, int column,\n");
-	puts(  	"const char* hier, const char* type, const char* comment) {\n");
+	// SystemPerl 1.301 is much faster, but it's nice to remain back
+	// compatible, and have a common wrapper.
+	puts("void "+modClassName(m_modp)+"::__vlCoverInsert(uint32_t* countp, bool enable, const char* filenamep, int lineno, int column,\n");
+	puts(  	"const char* hierp, const char* pagep, const char* commentp) {\n");
+	puts(   "static uint32_t fake_zero_count = 0;\n");
+	puts(   "if (!enable) countp = &fake_zero_count;\n");  // Used for second++ instantiation of identical bin
+	puts(   "*countp = 0;\n");
 	puts(   "SP_COVER_INSERT(countp,");
-	puts(	"  \"filename\",filename,");
+	puts(	"  \"filename\",filenamep,");
 	puts(	"  \"lineno\",lineno,");
 	puts(	"  \"column\",column,\n");
-	//puts(	"\"hier\",string(__VlSymsp->name())+hier,");  // Need to move hier into scopes and back out if do this
-	puts(	"\"hier\",string(name())+hier,");
-	puts(	"  \"type\",type,");
-	puts(	"  \"comment\",comment);\n");
+	//puts(	"\"hier\",string(__VlSymsp->name())+hierp,");  // Need to move hier into scopes and back out if do this
+	puts(	"\"hier\",string(name())+hierp,");
+	puts(	"  \"page\",pagep,");
+	puts(	"  \"comment\",commentp);\n");
 	puts("}\n");
     }
 }
@@ -1308,7 +1297,9 @@ void EmitCImp::emitTextSection(AstType type) {
 			puts("\n//*** Below code from `systemc in Verilog file\n");
 		    }
 		    ofp()->putsNoTracking("//#line "+cvtToStr(nodep->fileline()->lineno())
-					  +" \""+nodep->fileline()->filename()+"\"\n");
+					  +" ");
+		    ofp()->putsQuoted(nodep->fileline()->filename());
+		    ofp()->putsNoTracking("\n");
 		    last_line = nodep->fileline()->lineno();
 		}
 		ofp()->putsNoTracking(textp->text());
@@ -1343,7 +1334,7 @@ void EmitCImp::emitSensitives() {
 	for (AstNode* nodep=m_modp->stmtsp(); nodep; nodep = nodep->nextp()) {
 	    if (AstVar* varp = nodep->castVar()) {
 		if (varp->isInput() && (varp->isScSensitive() || varp->isUsedClock())) {
-		    puts("sensitive("+varp->name()+");\n");
+		    puts("sensitive << "+varp->name()+";\n");
 		}
 	    }
 	}
@@ -1417,7 +1408,7 @@ void EmitCStmts::emitVarList(AstNode* firstp, EisWhich which, const string& pref
 		    case EVL_ALL:  doit = true; break;
 		    case EVL_IO:   doit = varp->isIO(); break;
 		    case EVL_SIG:  doit = (varp->isSignal() && !varp->isIO()); break;
-		    case EVL_TEMP: doit = varp->isTemp(); break;
+		    case EVL_TEMP: doit = (varp->isTemp() && !varp->isIO()); break;
 		    default: v3fatalSrc("Bad Case");
 		    }
 		    if (varp->isStatic() ? !isstatic : isstatic) doit=false;
@@ -1425,7 +1416,7 @@ void EmitCStmts::emitVarList(AstNode* firstp, EisWhich which, const string& pref
 			int sigbytes = varp->widthAlignBytes();
 			if (varp->isUsedClock() && varp->widthMin()==1) sigbytes = 0;
 			else if (varp->arraysp()) sigbytes=7;
-			else if (varp->isScWide()) sigbytes=6;
+			else if (varp->isScBv()) sigbytes=6;
 			else if (sigbytes==8) sigbytes=5;
 			else if (sigbytes==4) sigbytes=4;
 			else if (sigbytes==2) sigbytes=2;
@@ -1557,7 +1548,7 @@ void EmitCImp::emitInt(AstModule* modp) {
 		if (!varp->initp()) nodep->v3fatalSrc("No init for a param?");
 		// These should be static const values, however microsloth VC++ doesn't
 		// support them.  They also cause problems with GDB under GCC2.95.
-		if (varp->isScWide()) {   // Unsupported for output
+		if (varp->isWide()) {   // Unsupported for output
 		    puts("// enum WData "+varp->name()+"  //wide");
 		} else if (!varp->initp()->castConst()) {   // Unsupported for output
 		    puts("// enum IData "+varp->name()+"  //not simple value");
@@ -1594,7 +1585,7 @@ void EmitCImp::emitInt(AstModule* modp) {
     if (v3Global.opt.trace() && !optSystemPerl()) {
 	puts("void\ttrace (SpTraceVcdCFile* tfp, int levels, int options=0);\n");
     }
-    puts("void\t__Vconfigure("+symClassName()+"* symsp);\n");
+    puts("void\t__Vconfigure("+symClassName()+"* symsp, bool first);\n");
     if (optSystemPerl()) puts("/*AUTOMETHODS*/\n");
 
     emitTextSection(AstType::SCINT);
@@ -1642,25 +1633,25 @@ void EmitCImp::emitImp(AstModule* modp) {
     // Us
     puts("#include \""+ symClassName() +".h\"\n");
 
-    if (optSystemPerl() && (m_splitFilenum || !m_fast)) {
+    if (optSystemPerl() && (splitFilenum() || !m_fast)) {
 	puts("\n");
 	puts("SP_MODULE_CONTINUED("+modClassName(modp)+");\n");
     }
 
     emitTextSection(AstType::SCIMPHDR);
 
-    if (m_slow && m_splitFilenum==0) {
+    if (m_slow && splitFilenum()==0) {
 	puts("\n//--------------------\n");
 	puts("// STATIC VARIABLES\n\n");
 	emitVarList(modp->stmtsp(), EVL_ALL, modClassName(modp));
     }
 
-    if (m_fast && m_splitFilenum==0) {
+    if (m_fast && splitFilenum()==0) {
 	emitTextSection(AstType::SCIMP);
 	emitStaticDecl(modp);
     }
 
-    if (m_slow && m_splitFilenum==0) {
+    if (m_slow && splitFilenum()==0) {
 	puts("\n//--------------------\n");
 	emitCtorImp(modp);
 	emitConfigureImp(modp);
@@ -1668,7 +1659,7 @@ void EmitCImp::emitImp(AstModule* modp) {
 	emitCoverageImp(modp);
     }
 
-    if (m_fast && m_splitFilenum==0) {
+    if (m_fast && splitFilenum()==0) {
 	if (modp->isTop()) {
 	    emitStaticDecl(modp);
 	    puts("\n//--------------------\n");
@@ -1677,7 +1668,7 @@ void EmitCImp::emitImp(AstModule* modp) {
 	}
     }
 
-    if (m_fast && m_splitFilenum==0) {
+    if (m_fast && splitFilenum()==0) {
 	if (v3Global.opt.trace() && optSystemPerl() && m_modp->isTop()) {
 	    puts("\n");
 	    puts("\n/*AUTOTRACE(__MODULE__,recurse,activity,exists)*/\n\n");
@@ -1689,9 +1680,6 @@ void EmitCImp::emitImp(AstModule* modp) {
     puts("// Internal Methods\n");
 }
 
-void EmitCImp::emitImpBottom(AstModule* modp) {
-}
-
 //######################################################################
 
 void EmitCImp::main(AstModule* modp, bool slow, bool fast) {
@@ -1702,8 +1690,7 @@ void EmitCImp::main(AstModule* modp, bool slow, bool fast) {
     string filenameNoExt = v3Global.opt.makeDir()+"/"+ modClassName(modp)+(m_fast ? "" : "__Slow");
 
     if (debug()>=5) {
-	for (int i=0;i<modp->level();i++) { cout<<"  "; }
-	UINFONL(0,"  Emitting "<<modClassName(modp)<<endl);
+	UINFO(0,"  Emitting "<<modClassName(modp)<<endl);
     }
 
     if (optSystemPerl()) {
@@ -1737,22 +1724,17 @@ void EmitCImp::main(AstModule* modp, bool slow, bool fast) {
 
     for (AstNode* nodep=modp->stmtsp(); nodep; nodep = nodep->nextp()) {
 	if (AstCFunc* funcp = nodep->castCFunc()) {
-	    if (v3Global.opt.outputSplit() > 1 && splitSize()
-		&& v3Global.opt.outputSplit() < splitSize()) {
+	    if (splitNeeded()) {
 		// Close old file
-		emitImpBottom (modp);
 		delete m_ofp; m_ofp=NULL;
-
 		// Open a new file
-		m_splitSize = 0;
-		m_ofp = newOutCFile (modp, !m_fast, true/*source*/, ++m_splitFilenum);
+		m_ofp = newOutCFile (modp, !m_fast, true/*source*/, splitFilenumInc());
 		emitImp (modp);
 	    }
 	    mainDoFunc(funcp);
 	}
     }
 
-    emitImpBottom (modp);
     delete m_ofp; m_ofp=NULL;
 }
 
@@ -1762,7 +1744,24 @@ void EmitCImp::main(AstModule* modp, bool slow, bool fast) {
 class EmitCTrace : EmitCStmts {
     AstCFunc*	m_funcp;	// Function we're in now
     bool	m_slow;		// Making slow file
+
     // METHODS
+    void newOutCFile(int filenum) {
+	string filename = (v3Global.opt.makeDir()+"/"+ topClassName()
+			   + (m_slow?"__Trace__Slow":"__Trace"));
+	if (filenum) filename += "__"+cvtToStr(filenum);
+	filename += ".cpp";
+
+	AstCFile* cfilep = newCFile(filename, m_slow, true/*source*/);
+	cfilep->support(true);
+
+	if (m_ofp) v3fatalSrc("Previous file not closed");
+	m_ofp = new V3OutCFile (filename);
+	m_ofp->putsHeader();
+
+	emitTraceHeader();
+    }
+
     void emitTraceHeader() {
 	// Includes
 	if (optSystemPerl()) {
@@ -1793,7 +1792,15 @@ class EmitCTrace : EmitCStmts {
 	puts(topClassName()+"* t=("+topClassName()+"*)userthis;\n");
 	puts(EmitCBaseVisitor::symClassVar()+" = t->__VlSymsp; // Setup global symbol table\n");
 	puts("if (!Verilated::calcUnusedSigs()) vl_fatal(__FILE__,__LINE__,__FILE__,\"Turning on wave traces requires Verilated::traceEverOn(true) call before time 0.\");\n");
+
+	//Future; need to wait to estabilish backwards compatibility
+	puts("#if defined(SPTRACEVCDC_VERSION) && SPTRACEVCDC_VERSION >= 1330\n");
+	puts("vcdp->scopeEscape(' ');\n");
 	puts("t->traceInitThis (vlSymsp, vcdp, code);\n");
+	puts("vcdp->scopeEscape('.');\n");  // Restore so SystemPerl traced files won't break
+	puts("#else\n");
+	puts("t->traceInitThis (vlSymsp, vcdp, code);\n");
+	puts("#endif\n");
 	puts("}\n");
 
 	puts("void "+topClassName()+"::traceFull(SpTraceVcd* vcdp, void* userthis, uint32_t code) {\n");
@@ -1821,44 +1828,47 @@ class EmitCTrace : EmitCStmts {
 	puts("\n//======================\n\n");
     }
 
-    bool emitTraceIsScWide(AstTraceInc* nodep) {
+    bool emitTraceIsScBv(AstTraceInc* nodep) {
 	AstVarRef* varrefp = nodep->valuep()->castVarRef();
 	if (!varrefp) return false;
 	AstVar* varp = varrefp->varp();
-	return varp->isSc() && varp->isScWide();
+	return varp->isSc() && varp->isScBv();
     }
     void emitTraceInitOne(AstTraceDecl* nodep) {
 	if (nodep->isWide()) {
 	    puts("vcdp->declArray");
 	} else if (nodep->isQuad()) {
 	    puts("vcdp->declQuad ");
-	} else if (nodep->msb() || nodep->lsb()) {
+	} else if (nodep->msbEndianed() || nodep->lsbEndianed()) {
 	    puts("vcdp->declBus  ");
 	} else {
 	    puts("vcdp->declBit  ");
 	}
 	puts("(c+"+cvtToStr(nodep->code()));
 	if (nodep->arrayWidth()) puts("+i*"+cvtToStr(nodep->widthWords()));
-	puts(",\""+nodep->showname()+"\"");
+	puts(",");
+	putsQuoted(nodep->showname());
 	if (nodep->arrayWidth()) {
 	    puts(",(i+"+cvtToStr(nodep->arrayLsb())+")");
 	} else {
 	    puts(",-1");
 	}
-	if (nodep->msb() || nodep->lsb()) {
-	    puts(","+cvtToStr(nodep->msb())+","+cvtToStr(nodep->lsb()));
+	if (nodep->msbEndianed() || nodep->lsbEndianed()) {
+	    puts(","+cvtToStr(nodep->msbEndianed())+","+cvtToStr(nodep->lsbEndianed()));
 	}
 	puts(");");
     }
 
     void emitTraceChangeOne(AstTraceInc* nodep, int arrayindex) {
 	nodep->precondsp()->iterateAndNext(*this);
-	string full = (m_funcp->funcType() == AstCFuncType::TRACE_FULL) ? "full":"chg";
-	if (nodep->isWide() || emitTraceIsScWide(nodep)) {
+	string full = ((m_funcp->funcType() == AstCFuncType::TRACE_FULL
+			|| m_funcp->funcType() == AstCFuncType::TRACE_FULL_SUB)
+		       ? "full":"chg");
+	if (nodep->isWide() || emitTraceIsScBv(nodep)) {
 	    puts("vcdp->"+full+"Array");
 	} else if (nodep->isQuad()) {
 	    puts("vcdp->"+full+"Quad ");
-	} else if (nodep->declp()->msb() || nodep->declp()->lsb()) {
+	} else if (nodep->declp()->msbEndianed() || nodep->declp()->lsbEndianed()) {
 	    puts("vcdp->"+full+"Bus  ");
 	} else {
 	    puts("vcdp->"+full+"Bit  ");
@@ -1867,7 +1877,7 @@ class EmitCTrace : EmitCStmts {
 			    + ((arrayindex<0) ? 0 : (arrayindex*nodep->declp()->widthWords()))));
 	puts(",");
 	emitTraceValue(nodep, arrayindex);
-	if (nodep->declp()->msb() || nodep->declp()->lsb()) {
+	if (nodep->declp()->msbEndianed() || nodep->declp()->lsbEndianed()) {
 	    puts(","+cvtToStr(nodep->declp()->widthMin()));
 	}
 	puts(");\n");
@@ -1876,8 +1886,8 @@ class EmitCTrace : EmitCStmts {
 	if (nodep->valuep()->castVarRef()) {
 	    AstVarRef* varrefp = nodep->valuep()->castVarRef();
 	    AstVar* varp = varrefp->varp();
-	    if (emitTraceIsScWide(nodep)) puts("(uint32_t*)");
 	    puts("(");
+	    if (emitTraceIsScBv(nodep)) puts("VL_SC_BV_DATAP(");
 	    varrefp->iterate(*this);	// Put var name out
 	    if (varp->arraysp()) {
 		if (arrayindex==-2) puts("[i]");
@@ -1885,7 +1895,7 @@ class EmitCTrace : EmitCStmts {
 		else puts("["+cvtToStr(arrayindex)+"]");
 	    }
 	    if (varp->isSc()) puts(".read()");
-	    if (emitTraceIsScWide(nodep)) puts(".get_datap()");
+	    if (emitTraceIsScBv(nodep)) puts(")");
 	    puts(")");
 	} else {
 	    puts("(");
@@ -1904,11 +1914,18 @@ class EmitCTrace : EmitCStmts {
     }
     virtual void visit(AstCFunc* nodep, AstNUser*) {
 	if (nodep->slow() != m_slow) return;
-	if (nodep->funcType() == AstCFuncType::TRACE_INIT
-	    || nodep->funcType() == AstCFuncType::TRACE_FULL
-	    || nodep->funcType() == AstCFuncType::TRACE_CHANGE) {
+	if (nodep->funcType().isTrace()) {   // TRACE_*
 	    m_funcp = nodep;
 
+	    if (splitNeeded()) {
+		// Close old file
+		delete m_ofp; m_ofp=NULL;
+		// Open a new file
+		newOutCFile (splitFilenumInc());
+	    }
+
+	    splitSizeInc(nodep);
+
 	    puts("\n");
 	    puts(nodep->rtnTypeVoid()); puts(" ");
 	    puts(topClassName()+"::"+nodep->name()
@@ -1920,8 +1937,11 @@ class EmitCTrace : EmitCStmts {
 	    puts("if (0 && vcdp && c) {}  // Prevent unused\n");
 	    if (nodep->funcType() == AstCFuncType::TRACE_INIT) {
 		puts("vcdp->module(vlSymsp->name()); // Setup signal names\n");
+	    } else if (nodep->funcType() == AstCFuncType::TRACE_INIT_SUB) {
 	    } else if (nodep->funcType() == AstCFuncType::TRACE_FULL) {
+	    } else if (nodep->funcType() == AstCFuncType::TRACE_FULL_SUB) {
 	    } else if (nodep->funcType() == AstCFuncType::TRACE_CHANGE) {
+	    } else if (nodep->funcType() == AstCFuncType::TRACE_CHANGE_SUB) {
 	    } else nodep->v3fatalSrc("Bad Case");
 
 	    if (nodep->initsp()) puts("// Variables\n");
@@ -1931,8 +1951,6 @@ class EmitCTrace : EmitCStmts {
 
 	    puts("// Body\n");
 	    puts("{\n");
-	    // Do the statements  Note not from this node, but the TRACE_INIT's.
-	    // That saved us from having 3 copies of all of the TRACEs
 	    nodep->stmtsp()->iterateAndNext(*this);
 	    puts("}\n");
 	    if (nodep->finalsp()) puts("// Final\n");
@@ -1974,23 +1992,14 @@ public:
     virtual ~EmitCTrace() {}
     void main() {
 	// Put out the file
-	string filename = (v3Global.opt.makeDir()+"/"+ topClassName()
-			   + (m_slow?"__Trace__Slow.cpp":"__Trace.cpp"));
-	AstCFile* cfilep = newCFile(filename, m_slow, true/*source*/);
-	cfilep->support(true);
-
-	V3OutCFile of (filename);
-	of.putsHeader();
-	m_ofp = &of;
-
-	emitTraceHeader();
+	newOutCFile(0);
 
 	if (m_slow) emitTraceSlow();
 	else emitTraceFast();
 
 	v3Global.rootp()->accept(*this);
 
-	m_ofp = NULL;
+	delete m_ofp; m_ofp=NULL;
     }
 };
 

src/V3EmitC.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3EmitCBase.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -42,7 +43,7 @@ public:
     V3OutCFile(const string& filename) : V3OutFile(filename) {
 	resetPrivate();
     }
-    virtual ~V3OutCFile() {};
+    virtual ~V3OutCFile() {}
     virtual void putsCellDecl(const string& classname, const string& cellname) {
 	this->printf("%-19s\t%s;\n",
 		     (classname + "*").c_str(),cellname.c_str());
@@ -65,30 +66,36 @@ public:
 class V3OutScFile : public V3OutCFile {
 public:
     V3OutScFile(const string& filename) : V3OutCFile(filename) {}
-    virtual ~V3OutScFile() {};
+    virtual ~V3OutScFile() {}
     virtual void putsHeader() { puts("// Verilated -*- SystemC -*-\n"); }
-    virtual void putsIntTopInclude() { puts("#include \"systemc.h\"\n"); }
+    virtual void putsIntTopInclude() {
+	puts("#include \"systemc.h\"\n");
+	puts("#include \"verilatedsc.h\"\n");
+    }
 };
 
 class V3OutSpFile : public V3OutCFile {
 public:
     V3OutSpFile(const string& filename) : V3OutCFile(filename) {}
-    virtual ~V3OutSpFile() {};
+    virtual ~V3OutSpFile() {}
     virtual void putsHeader() { puts("// Verilated -*- SystemC -*-\n"); }
-    virtual void putsIntTopInclude() { puts("#include \"systemperl.h\"\n"); }
+    virtual void putsIntTopInclude() {
+	puts("#include \"systemperl.h\"\n");
+	puts("#include \"verilatedsc.h\"\n");
+    }
 };
 
-class V3OutVFile : public V3OutCFile {
+class V3OutVFile : public V3OutFile {
 public:
-    V3OutVFile(const string& filename) : V3OutCFile(filename) {}
-    virtual ~V3OutVFile() {};
+    V3OutVFile(const string& filename) : V3OutFile(filename) {}
+    virtual ~V3OutVFile() {}
     virtual void putsHeader() { puts("// Verilated -*- Verilog -*-\n"); }
 };
 
 class V3OutMkFile : public V3OutFile {
 public:
     V3OutMkFile(const string& filename) : V3OutFile(filename) {}
-    virtual ~V3OutMkFile() {};
+    virtual ~V3OutMkFile() {}
     virtual void putsHeader() { puts("# Verilated -*- Makefile -*-\n"); }
     // No automatic indentation yet.
     void puts(const char* strg) { putsNoTracking(strg); }
@@ -103,9 +110,10 @@ public:
     // STATE
     V3OutCFile*	m_ofp;
     // METHODS
-    V3OutCFile*	ofp() const { return m_ofp; };
+    V3OutCFile*	ofp() const { return m_ofp; }
     void puts(const string& str) { ofp()->puts(str); }
     void putbs(const string& str) { ofp()->putbs(str); }
+    void putsQuoted(const string& str) { ofp()->putsQuoted(str); }
     bool optSystemC() { return v3Global.opt.systemC(); }
     bool optSystemPerl() { return v3Global.opt.systemPerl(); }
     static string symClassName() { return v3Global.opt.prefix()+"__Syms"; }
@@ -137,7 +145,7 @@ public:
 };
 
 //######################################################################
-// Fileize state, as a visitor of each AstNode
+// Count operations under the given node, as a visitor of each AstNode
 
 class EmitCBaseCounterVisitor : public AstNVisitor {
 private:

src/V3EmitCInlines.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3EmitCSyms.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -38,11 +39,17 @@
 // Symbol table emitting
 
 class EmitCSyms : EmitCBaseVisitor {
+    // NODE STATE
+    // Cleared on Netlist
+    //  AstModule::user1()	-> bool.  Set true __Vconfigure called
+    AstUser1InUse	m_inuser1;
+
     // STATE
     AstModule*	m_modp;		// Current module
     typedef pair<AstScope*,AstModule*> ScopeModPair;
     vector<ScopeModPair>  m_scopes;	// Every scope by module
     V3LanguageWords 	m_words;	// Reserved word detector
+    int		m_coverBins;		// Coverage bin number
 
     // METHODS
     void emitInt();
@@ -58,7 +65,9 @@ class EmitCSyms : EmitCBaseVisitor {
 	if (nodep->name() != "") {
 	    string rsvd = m_words.isKeyword(nodep->name());
 	    if (rsvd != "") {
-		nodep->v3error("Unsupported: "+rsvd+": "<<nodep->name());
+		// Generally V3Name should find all of these and throw SYMRSVDWORD.
+		// We'll still check here because the compiler errors resulting if we miss this warning are SO nasty
+		nodep->v3error("Symbol matching "+rsvd+" reserved word reached emitter, should have hit SYMRSVDWORD: '"<<nodep->name()<<"'");
 	    }
 	}
     }
@@ -70,6 +79,7 @@ class EmitCSyms : EmitCBaseVisitor {
 
 	// Sort m_scopes by scope name
 	sort(m_scopes.begin(), m_scopes.end(), CmpName());
+
 	// Output
 	emitInt();
 	emitImp();
@@ -78,11 +88,18 @@ class EmitCSyms : EmitCBaseVisitor {
 	nameCheck(nodep);
 	m_modp = nodep;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	nameCheck(nodep);
 	m_scopes.push_back(make_pair(nodep, m_modp));
     }
+    virtual void visit(AstCoverDecl* nodep, AstNUser*) {
+	// Assign numbers to all bins, so we know how big of an array to use
+	if (!nodep->dataDeclNullp()) {  // else duplicate we don't need code for
+	    nodep->binNum(m_coverBins++);
+	}
+    }
     // NOPs
     virtual void visit(AstNodeStmt*, AstNUser*) {}
     virtual void visit(AstConst*, AstNUser*) {}
@@ -96,6 +113,7 @@ class EmitCSyms : EmitCBaseVisitor {
 public:
     EmitCSyms(AstNetlist* nodep) {
 	m_modp = NULL;
+	m_coverBins = 0;
 	nodep->accept(*this);
     }
 };
@@ -145,6 +163,12 @@ void EmitCSyms::emitInt() {
 	}
     }
 
+    puts("\n// COVERAGE\n");
+    if (m_coverBins) {
+	ofp()->putAlign(V3OutFile::AL_AUTO, sizeof(uint32_t));
+	puts("uint32_t\t__Vcoverage["); puts(cvtToStr(m_coverBins)); puts("];\n");
+    }
+
     puts("\n// CREATORS\n");
     puts(symClassName()+"("+topClassName()+"* topp, const char* namep);\n");
     puts((string)"~"+symClassName()+"() {};\n");
@@ -186,12 +210,10 @@ void EmitCSyms::emitImp() {
 	AstScope* scopep = it->first;  AstModule* modp = it->second;
 	if (modp->isTop()) {
 	} else {
-	    string arrow = scopep->name();
-	    if (arrow.substr(0,4) == "TOP.") arrow.replace(0,4,".");
 	    ofp()->printf("\t%c %-30s ", comma, scopep->nameDotless().c_str());
-	    puts("(Verilated::catName(topp->name(),\"");
-	    puts(arrow);
-	    puts("\"))\n");
+	    puts("(Verilated::catName(topp->name(),");
+	    putsQuoted("."+scopep->prettyName());
+	    puts("))\n");
 	    comma=',';
 	}
     }
@@ -215,11 +237,16 @@ void EmitCSyms::emitImp() {
 	}
     }
     puts("// Setup each module's pointer back to symbol table (for public functions)\n");
-    puts("TOPp->__Vconfigure(this);\n");
+    puts("TOPp->__Vconfigure(this, true);\n");
     for (vector<ScopeModPair>::iterator it = m_scopes.begin(); it != m_scopes.end(); ++it) {
 	AstScope* scopep = it->first;  AstModule* modp = it->second;
 	if (!modp->isTop()) {
-	    puts(scopep->nameDotless()+".__Vconfigure(this);\n");
+	    // first is used by AstCoverDecl's call to __vlCoverInsert
+	    bool first = !modp->user1();
+	    modp->user1(true);
+	    puts(scopep->nameDotless()+".__Vconfigure(this, "
+		 +(first?"true":"false")
+		 +");\n");
 	}
     }
 

src/V3EmitMk.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2004-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2004-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -37,9 +38,14 @@
 
 class EmitMkVisitor : public EmitCBaseVisitor {
 public:
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     void emitClassMake() {
 	// Generate the makefile
 	V3OutMkFile of (v3Global.opt.makeDir()+"/"+ v3Global.opt.prefix() + "_classes.mk");
@@ -82,6 +88,7 @@ public:
 	of.puts("PERL = "+V3Options::getenvPERL()+"\n");
 	of.puts("VERILATOR_ROOT = "+V3Options::getenvVERILATOR_ROOT()+"\n");
 	of.puts("SYSTEMPERL = "+V3Options::getenvSYSTEMPERL()+"\n");
+	of.puts("SYSTEMPERL_INCLUDE = "+V3Options::getenvSYSTEMPERL_INCLUDE()+"\n");
 
 	of.puts("\n# Switches...\n");
 	of.puts(string("VM_SP = ")+(v3Global.opt.systemPerl()?"1":"0")+"\n");

src/V3EmitMk.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3EmitV.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2004-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2004-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -35,21 +36,26 @@
 //######################################################################
 // Emit statements and math operators
 
-class EmitVImp : public EmitCBaseVisitor {
-private:
+class EmitVBaseVisitor : public EmitCBaseVisitor {
+    // MEMBERS
     bool	m_suppressSemi;
-    AstModule*	m_modp;
-public:
-    //int debug() { return 9; }
 
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
 
+    virtual void puts(const string& str) = 0;
+    virtual void putbs(const string& str) = 0;
+    virtual void putsNoTracking(const string& str) = 0;
+    
     // VISITORS
     virtual void visit(AstNetlist* nodep, AstNUser*) {
 	nodep->iterateChildren(*this);
     }
     virtual void visit(AstModule* nodep, AstNUser*) {
-	m_modp = nodep;
 	putbs("module "+modClassName(nodep)+";\n");
 	nodep->iterateChildren(*this);
 	puts("endmodule\n");
@@ -86,7 +92,7 @@ public:
     virtual void visit(AstAlways* nodep, AstNUser*) {
 	putbs("always ");
 	nodep->sensesp()->iterateAndNext(*this);
-	putbs("begin\n");
+	putbs(" begin\n");
 	nodep->bodysp()->iterateAndNext(*this);
 	puts("end\n");
     }
@@ -103,7 +109,7 @@ public:
 	puts(";\n");
     }
     virtual void visit(AstAssignAlias* nodep, AstNUser*) {
-	putbs("assign ");
+	putbs("alias ");
 	nodep->lhsp()->iterateAndNext(*this);
 	putbs(" = ");
 	nodep->rhsp()->iterateAndNext(*this);
@@ -117,17 +123,22 @@ public:
 	if (!m_suppressSemi) puts(";\n");
     }
     virtual void visit(AstSenTree* nodep, AstNUser*) {
+	// AstSenItem is called for dumping in isolation by V3Order
 	putbs("@(");
-	nodep->iterateChildren(*this);
-	puts(") ");
+	for (AstNode* expp=nodep->sensesp(); expp; expp = expp->nextp()) {
+	    nodep->iterateChildren(*this);
+	    if (expp->nextp()) puts(" or ");
+	}
+	puts(")");
+    }
+    virtual void visit(AstSenGate* nodep, AstNUser*) {
+	emitVerilogFormat(nodep, nodep->emitVerilog(), nodep->sensesp(), nodep->rhsp());
     }
     virtual void visit(AstSenItem* nodep, AstNUser*) {
 	putbs("");
-	if (nodep->backp()->castSenItem()) puts(" or ");
 	puts(nodep->edgeType().verilogKwd());
-	puts(" ");
+	if (nodep->sensp()) puts(" ");
 	nodep->iterateChildren(*this);
-	puts(" ");
     }
     virtual void visit(AstNodeCase* nodep, AstNUser*) {
 	putbs(nodep->verilogKwd());
@@ -157,19 +168,16 @@ public:
 	puts((string)"// "+nodep->name()+"\n");
 	nodep->iterateChildren(*this);
     }
-    virtual void visit(AstCoverDecl*, AstNUser*) {
-	// N/A
-    }
-    virtual void visit(AstCoverInc*, AstNUser*) {
-	// N/A
-    }
+    virtual void visit(AstCoverDecl*, AstNUser*) {}  // N/A
+    virtual void visit(AstCoverInc*, AstNUser*) {}  // N/A
+    virtual void visit(AstCoverToggle*, AstNUser*) {}  // N/A
 
     void visitNodeDisplay(AstNode* nodep, AstNode* filep, const string& text, AstNode* exprsp) {
 	putbs(nodep->verilogKwd());
 	putbs(" (");
 	if (filep) { filep->iterateAndNext(*this); putbs(","); }
 	puts("\"");
-	ofp()->putsNoTracking(text);
+	putsNoTracking(text);   // Not putsQuoted, as display text contains \ already
 	puts("\"");
 	for (AstNode* expp=exprsp; expp; expp = expp->nextp()) {
 	    puts(",");
@@ -232,6 +240,13 @@ public:
 	nodep->bodysp()->iterateAndNext(*this);
 	puts("}\n");
     }
+    virtual void visit(AstRepeat* nodep, AstNUser*) {
+	puts("repeat (");
+	nodep->countp()->iterateAndNext(*this);
+	puts(") {\n");
+	nodep->bodysp()->iterateAndNext(*this);
+	puts("}\n");
+    }
     virtual void visit(AstWhile* nodep, AstNUser*) {
 	nodep->precondsp()->iterateAndNext(*this);
 	puts("while (");
@@ -260,7 +275,7 @@ public:
 	putbs("$finish;\n");
     }
     virtual void visit(AstText* nodep, AstNUser*) {
-	ofp()->putsNoTracking(nodep->text());
+	putsNoTracking(nodep->text());
     }
     virtual void visit(AstScopeName* nodep, AstNUser*) {
     }
@@ -353,8 +368,8 @@ public:
     }
     virtual void visit(AstRange* nodep, AstNUser*) {
 	puts("[");
-	nodep->msbp()->iterateAndNext(*this); puts(":");
-	nodep->lsbp()->iterateAndNext(*this); puts("]");
+	nodep->msbEndianedp()->iterateAndNext(*this); puts(":");
+	nodep->lsbEndianedp()->iterateAndNext(*this); puts("]");
     }
     virtual void visit(AstSel* nodep, AstNUser*) {
 	nodep->fromp()->iterateAndNext(*this); puts("[");
@@ -427,27 +442,56 @@ public:
     virtual void visit(AstCell*, AstNUser*) {}		// Handled outside the Visit class
     // Default
     virtual void visit(AstNode* nodep, AstNUser*) {
-	puts((string)"\n???? // "+nodep->typeName()+"\n");
+	puts((string)"\n???? // "+nodep->prettyTypeName()+"\n");
 	nodep->iterateChildren(*this);
-	nodep->v3fatalSrc("Unknown node type reached emitter: "<<nodep->typeName());
+	nodep->v3fatalSrc("Unknown node type reached emitter: "<<nodep->prettyTypeName());
     }
 
 public:
-    EmitVImp() {
+    EmitVBaseVisitor() {
 	m_suppressSemi = false;
-	m_modp = NULL;
     }
-    void main(AstNode* nodep, V3OutCFile* ofp);
-    virtual ~EmitVImp() {}
+    virtual ~EmitVBaseVisitor() {}
 };
 
 //######################################################################
+// Emit to an output file
 
-void EmitVImp::main(AstNode* modp, V3OutCFile* ofp) {
-    // Output a module, or overall netlist
-    m_ofp = ofp;
-    modp->accept(*this);
-}
+class EmitVFileVisitor : public EmitVBaseVisitor {
+    // MEMBERS
+    V3OutFile*	m_ofp;
+    // METHODS
+    V3OutFile*	ofp() const { return m_ofp; }
+    void puts(const string& str) { ofp()->puts(str); }
+    void putbs(const string& str) { ofp()->putbs(str); }
+    void putsNoTracking(const string& str) { ofp()->putsNoTracking(str); }
+    
+public:
+    EmitVFileVisitor(AstNode* nodep, V3OutFile* ofp) {
+	m_ofp = ofp;
+	nodep->accept(*this);
+    }
+    virtual ~EmitVFileVisitor() {}
+};
+
+//######################################################################
+// Emit to a stream (perhaps stringstream)
+
+class EmitVStreamVisitor : public EmitVBaseVisitor {
+    // MEMBERS
+    ostream&	m_os;
+    // METHODS
+    void puts(const string& str) { m_os<<str; }
+    void putbs(const string& str) { m_os<<str; }
+    void putsNoTracking(const string& str) { m_os<<str; }
+    
+public:
+    EmitVStreamVisitor(AstNode* nodep, ostream& os)
+	: m_os(os) {
+	nodep->accept(*this);
+    }
+    virtual ~EmitVStreamVisitor() {}
+};
 
 //######################################################################
 // EmitV class functions
@@ -458,15 +502,18 @@ void V3EmitV::emitv() {
 	// All-in-one file
 	V3OutVFile of (v3Global.opt.makeDir()+"/"+v3Global.opt.prefix()+"__Vout.v");
 	of.putsHeader();
-	EmitVImp imp;
-	imp.main(v3Global.rootp(), &of);
+	EmitVFileVisitor visitor (v3Global.rootp(), &of);
     } else {
 	// Process each module in turn
 	for (AstModule* modp = v3Global.rootp()->modulesp(); modp; modp=modp->nextp()->castModule()) {
-	    EmitVImp imp;
-	    V3OutVFile of (v3Global.opt.makeDir()+"/"+imp.modClassName(modp)+"__Vout.v");
+	    V3OutVFile of (v3Global.opt.makeDir()
+			   +"/"+EmitCBaseVisitor::modClassName(modp)+"__Vout.v");
 	    of.putsHeader();
-	    imp.main(modp, &of);
+	    EmitVFileVisitor visitor (modp, &of);
 	}
     }
 }
+
+void V3EmitV::verilogForTree(AstNode* nodep, ostream& os) {
+    EmitVStreamVisitor(nodep, os);
+}

src/V3EmitV.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -31,6 +32,7 @@
 class V3EmitV {
 public:
     static void emitv();
+    static void verilogForTree(AstNode* nodep, ostream& os=cout);
 };
 
 #endif // Guard

src/V3Error.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -37,6 +38,7 @@ FileLine FileLine::s_defaultFileLine = FileLine(EmptySecret());
 int V3Error::s_errCount = 0;
 int V3Error::s_warnCount = 0;
 int V3Error::s_debugDefault = 0;
+int V3Error::s_tellManual = 0;
 ostringstream V3Error::s_errorStr;		// Error string being formed
 V3ErrorCode V3Error::s_errorCode = V3ErrorCode::FATAL;
 bool V3Error::s_describedEachWarn[V3ErrorCode::MAX];
@@ -44,7 +46,7 @@ bool V3Error::s_describedWarnings = false;
 bool V3Error::s_pretendError[V3ErrorCode::MAX];
 
 struct v3errorIniter {
-    v3errorIniter() {  V3Error::init(); };
+    v3errorIniter() {  V3Error::init(); }
 };
 v3errorIniter v3errorInit;
 
@@ -69,10 +71,10 @@ FileLine::FileLine(FileLine::EmptySecret) {
     m_lineno=0;
     m_filename="COMMAND_LINE";
 
-    m_warnOff=0;
-    for (int codei=V3ErrorCode::FIRST_WARN; codei<V3ErrorCode::MAX; codei++) {
+    m_warnOn=0;
+    for (int codei=V3ErrorCode::MIN; codei<V3ErrorCode::MAX; codei++) {
 	V3ErrorCode code = (V3ErrorCode)codei;
-	if (code.defaultsOff()) warnOff(code, true);
+	warnOff(code, code.defaultsOff());
     }
 }
 
@@ -152,7 +154,7 @@ const string FileLine::profileFuncname() const {
 	   != string::npos) {
 	name.replace(pos, 1, "_");
     }
-    name += "__"+cvtToStr(lineno());
+    name += "__l"+cvtToStr(lineno());
     return name;
 }
 
@@ -165,9 +167,9 @@ ostream& operator<<(ostream& os, FileLine* fileline) {
 }
 
 bool FileLine::warnIsOff(V3ErrorCode code) const {
-    if (m_warnOff.test(code)) return true;
+    if (!m_warnOn.test(code)) return true;
     // UNOPTFLAT implies UNOPT
-    if (code==V3ErrorCode::UNOPT && m_warnOff.test(V3ErrorCode::UNOPTFLAT)) return true;
+    if (code==V3ErrorCode::UNOPT && !m_warnOn.test(V3ErrorCode::UNOPTFLAT)) return true;
     return false;
 }
 
@@ -284,6 +286,7 @@ bool V3Error::isError(V3ErrorCode code) {
     if (code==V3ErrorCode::SUPPRESS) return false;
     else if (code==V3ErrorCode::INFO) return false;
     else if (code==V3ErrorCode::FATAL) return true;
+    else if (code==V3ErrorCode::FATALSRC) return true;
     else if (code==V3ErrorCode::ERROR) return true;
     else if (code<V3ErrorCode::FIRST_WARN
 	     || s_pretendError[code]) return true;
@@ -294,11 +297,24 @@ string V3Error::msgPrefix(V3ErrorCode code) {
     if (code==V3ErrorCode::SUPPRESS) return "-arning-suppressed: ";
     else if (code==V3ErrorCode::INFO) return "-Info: ";
     else if (code==V3ErrorCode::FATAL) return "%Error: ";
+    else if (code==V3ErrorCode::FATALSRC) return "%Error: Internal Error: ";
     else if (code==V3ErrorCode::ERROR) return "%Error: ";
     else if (isError(code)) return "%Error-"+(string)code.ascii()+": ";
     else return "%Warning-"+(string)code.ascii()+": ";
 }
 
+//======================================================================
+// Abort/exit
+
+void V3Error::vlAbort () {
+    if (V3Error::debugDefault()) {
+	cerr<<msgPrefix()<<"Aborting since under --debug"<<endl;
+	abort();
+    } else {
+	exit(10);
+    }
+}
+
 //======================================================================
 // Global Functions
 
@@ -321,10 +337,6 @@ void V3Error::suppressThisWarning() {
     }
 }
 
-void V3Error::v3abort () {
-    v3fatalSrc("v3abort called\n");
-}
-
 void V3Error::v3errorEnd (ostringstream& sstr) {
 #ifdef __COVERITY__
     if (s_errorCode==V3ErrorCode::FATAL) __coverity_panic__(x);
@@ -351,12 +363,27 @@ void V3Error::v3errorEnd (ostringstream& sstr) {
 		    cerr<<msgPrefix()<<"else you may end up with different sim results."<<endl;
 		}
 	    }
+	    // If first warning is not the user's fault (internal/unsupported) then give the website
+	    // Not later warnings, as a internal may be caused by an earlier problem
+	    if (s_tellManual == 0) {
+		if (s_errorCode.mentionManual()
+		    || sstr.str().find("Unsupported") != string::npos) {
+		    s_tellManual = 1;
+		} else {
+		    s_tellManual = 2;
+		}
+	    }
 	    if (isError(s_errorCode)) incErrors();
 	    else incWarnings();
-	    if (s_errorCode==V3ErrorCode::FATAL) {
+	    if (s_errorCode==V3ErrorCode::FATAL
+		|| s_errorCode==V3ErrorCode::FATALSRC) {
 		static bool inFatal = false;
 		if (!inFatal) {
 		    inFatal = true;
+		    if (s_tellManual==1) {
+			cerr<<msgPrefix()<<"See the manual and http://www.veripool.org/verilator for more assistance."<<endl;
+			s_tellManual = 2;
+		    }
 #ifndef _V3ERROR_NO_GLOBAL_
 		    if (debug()) {
 			v3Global.rootp()->dumpTreeFile(v3Global.debugFilename("final.tree",99));
@@ -366,12 +393,7 @@ void V3Error::v3errorEnd (ostringstream& sstr) {
 #endif
 		}
 
-		if (V3Error::debugDefault()) {
-		    cerr<<msgPrefix()<<"Aborting since under --debug"<<endl;
-		    abort();
-		} else {
-		    exit(10);
-		}
+		vlAbort();
 	    }
 	}
     }

src/V3Error.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -33,13 +34,20 @@
 class V3ErrorCode {
 public:
     enum en {
+	MIN=0,		// Keep first
+	//
 	SUPPRESS,	// Warning suppressed by user
 	INFO,		// General information out
 	FATAL,		// Kill the program
+	FATALSRC,	// Kill the program, for internal source errors
 	ERROR,		// General error out, can't suppress
+	// Boolean information we track per-line, but aren't errors
+	I_COVERAGE,	// Coverage is on/off from /*verilator coverage_on/off*/
+	I_TRACING,	// Tracing is on/off from /*verilator tracing_on/off*/
 	// Error codes:
 	MULTITOP,	// Error: Multiple top level modules
 	TASKNSVAR,	// Error: Task I/O not simple
+	BLKLOOPINIT,	// Error: Delayed assignment to array inside for loops
 	// Warning codes:
 	FIRST_WARN,	// Just a code so the program knows where to start warnings
 	//
@@ -51,10 +59,12 @@ public:
 	CMPCONST,	// Comparison is constant due to limited range
 	COMBDLY,	// Combinatorial delayed assignment
 	STMTDLY,	// Delayed statement
+	SYMRSVDWORD,	// Symbol is Reserved Word
 	GENCLK,		// Generated Clock
 	IMPERFECTSCH,	// Imperfect schedule (disabled by default)
 	IMPLICIT,	// Implicit wire
 	IMPURE,		// Impure function not being inlined
+	LITENDIAN,	// Little bit endian vector
 	MULTIDRIVEN,	// Driven from multiple blocks
 	REDEFMACRO,	// Redefining existing define macro
 	UNDRIVEN,	// No drivers
@@ -69,42 +79,51 @@ public:
 	// ***Add new elements below also***
     };
     enum en m_e;
-    inline V3ErrorCode () {};
-    inline V3ErrorCode (en _e) : m_e(_e) {};
+    inline V3ErrorCode () {}
+    inline V3ErrorCode (en _e) : m_e(_e) {}
     V3ErrorCode (const char* msgp);	// Matching code or ERROR
-    explicit inline V3ErrorCode (int _e) : m_e(static_cast<en>(_e)) {};
-    operator en () const { return m_e; };
+    explicit inline V3ErrorCode (int _e) : m_e(static_cast<en>(_e)) {}
+    operator en () const { return m_e; }
     const char* ascii() const {
 	const char* names[] = {
 	    // Leading spaces indicate it can't be disabled.
-	    " SUPPRESS", " INFO", " FATAL", " ERROR",
-	     "MULTITOP", "TASKNSVAR",
+	    " MIN", " SUPPRESS", " INFO", " FATAL", " FATALSRC", " ERROR",
+	    // Boolean
+	    " I_COVERAGE", " I_TRACING",
+	    // Errors
+	    "MULTITOP", "TASKNSVAR", "BLKLOOPINIT",
+	    // Warnings
 	    " FIRST_WARN",
 	    "BLKANDNBLK",
 	    "CASEINCOMPLETE", "CASEOVERLAP", "CASEWITHX", "CASEX", "CMPCONST",
-	    "COMBDLY", "STMTDLY", "GENCLK", "IMPERFECTSCH", "IMPLICIT", "IMPURE",
+	    "COMBDLY", "STMTDLY", "SYMRSVDWORD", "GENCLK", "IMPERFECTSCH", "IMPLICIT", "IMPURE",
+	    "LITENDIAN",
 	    "MULTIDRIVEN", "REDEFMACRO",
 	    "UNDRIVEN", "UNOPT", "UNOPTFLAT", "UNSIGNED", "UNUSED",
 	    "VARHIDDEN", "WIDTH", "WIDTHCONCAT",
 	    " MAX"
 	};
 	return names[m_e];
-    };
+    }
     // Warnings that default to off
-    bool defaultsOff() const { return ( m_e==IMPERFECTSCH );};
+    bool defaultsOff() const { return ( m_e==IMPERFECTSCH ); }
     // Warnings that warn about nasty side effects
-    bool dangerous() const { return ( m_e==COMBDLY );};
+    bool dangerous() const { return ( m_e==COMBDLY ); }
     // Warnings we'll present to the user as errors
     // Later -Werror- options may make more of these.
-    bool pretendError() const { return ( m_e==BLKANDNBLK || m_e==IMPURE); };
+    bool pretendError() const { return ( m_e==BLKANDNBLK || m_e==IMPURE || m_e==SYMRSVDWORD); }
+    // Warnings to mention manual
+    bool mentionManual() const { return ( m_e==FATALSRC || pretendError() ); }
+
     // Warnings that are lint only
     bool lintError() const { return ( m_e==CASEINCOMPLETE || m_e==CASEOVERLAP
 				      || m_e==CASEWITHX || m_e==CASEX
 				      || m_e==CMPCONST
 				      || m_e==IMPLICIT
+				      || m_e==LITENDIAN
 				      || m_e==UNDRIVEN || m_e==UNSIGNED
 				      || m_e==UNUSED || m_e==VARHIDDEN
-				      || m_e==WIDTH); };
+				      || m_e==WIDTH); }
   };
   inline bool operator== (V3ErrorCode lhs, V3ErrorCode rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (V3ErrorCode lhs, V3ErrorCode::en rhs) { return (lhs.m_e == rhs); }
@@ -122,6 +141,7 @@ class V3Error {
     static int		s_debugDefault;		// Default debugging level
     static int		s_errCount;		// Error count
     static int		s_warnCount;		// Error count
+    static int 		s_tellManual;		// Tell user to see manual, 0=not yet, 1=doit, 2=disable
     static ostringstream s_errorStr;		// Error string being formed
     static V3ErrorCode	s_errorCode;		// Error string being formed will abort
     enum MaxErrors { 	MAX_ERRORS = 50 };	// Fatal after this may errors
@@ -155,7 +175,7 @@ class V3Error {
     static ostringstream& v3errorPrep (V3ErrorCode code) {
 	s_errorStr.str(""); s_errorCode=code; return s_errorStr; }
     static ostringstream& v3errorStr () { return s_errorStr; }
-    static void	v3abort();
+    static void	vlAbort();
     static void	v3errorEnd(ostringstream& sstr);	// static, but often overridden in classes.
 };
 
@@ -165,12 +185,12 @@ inline void v3errorEnd(ostringstream& sstr) { V3Error::v3errorEnd(sstr); }
 
 // These allow errors using << operators: v3error("foo"<<"bar");
 // Careful, you can't put () around msg, as you would in most macro definitions
-#define v3info(msg)  v3errorEnd(((V3Error::v3errorPrep(V3ErrorCode::INFO)<<msg),V3Error::v3errorStr()));
-#define v3fatal(msg) v3errorEnd(((V3Error::v3errorPrep(V3ErrorCode::FATAL)<<msg),V3Error::v3errorStr()));
-#define v3error(msg) v3errorEnd(((V3Error::v3errorPrep(V3ErrorCode::ERROR)<<msg),V3Error::v3errorStr()));
 #define v3warn(code,msg) v3errorEnd(((V3Error::v3errorPrep(V3ErrorCode::code)<<msg),V3Error::v3errorStr()));
+#define v3info(msg)  v3warn(INFO,msg)
+#define v3fatal(msg) v3warn(FATAL,msg)
+#define v3error(msg) v3warn(ERROR,msg)
 // Use this instead of fatal() to mention the source code line.
-#define v3fatalSrc(msg) v3fatal("Internal Error: "<<__FILE__<<":"<<dec<<__LINE__<<": "<<msg)
+#define v3fatalSrc(msg) v3warn(FATALSRC,__FILE__<<":"<<dec<<__LINE__<<": "<<msg)
 
 #define UINFO(level,stmsg) {if(debug()>=(level)) { cout<<"- "<<V3Error::lineStr(__FILE__,__LINE__)<<stmsg; }}
 #define UINFONL(level,stmsg) {if(debug()>=(level)) { cout<<stmsg; } }
@@ -178,7 +198,7 @@ inline void v3errorEnd(ostringstream& sstr) { V3Error::v3errorEnd(sstr); }
 #define UDEBUGONLY(stmts) {stmts}
 #define UASSERT(condition,stmsg) { if (!(condition)) { v3fatalSrc(stmsg); }}
 // For use in V3Ast static functions only
-#define UASSERT_STATIC(condition,stmsg) { if (!(condition)) { cerr<<"Internal Error: "<<__FILE__<<":"<<dec<<__LINE__<<(stmsg)<<endl; abort(); } }
+#define UASSERT_STATIC(condition,stmsg) { if (!(condition)) { cerr<<"Internal Error: "<<__FILE__<<":"<<dec<<__LINE__<<":"<<(stmsg)<<endl; abort(); } }
 
 #define V3ERROR_NA v3error("Internal: Unexpected Call")
 
@@ -188,13 +208,21 @@ template< class T> std::string cvtToStr (const T& t) {
     ostringstream os; os<<t; return os.str();
 }
 
+inline uint32_t cvtToHash(void* vp) {
+    // We can shove a 64 bit pointer into a 32 bit bucket
+    // On 32 bit systems, lower is always 0, but who cares?
+    union { void* up; struct {uint32_t upper; uint32_t lower;} l;} u;
+    u.l.upper=0; u.l.lower=0; u.up=vp;
+    return u.l.upper^u.l.lower;
+}
+
 //######################################################################
 
 class FileLine {
     // File and line number of an object, mostly for error reporting
     int		m_lineno;
     string	m_filename;
-    bitset<V3ErrorCode::MAX>	m_warnOff;
+    bitset<V3ErrorCode::MAX>	m_warnOn;
     static FileLine s_defaultFileLine;
     struct EmptySecret {};
 protected:
@@ -208,8 +236,8 @@ protected:
     void incLineno() { m_lineno++; }
     FileLine* copyOrSameFileLine();
 public:
-    FileLine (const string& filename, int lineno) { m_lineno=lineno; m_filename = filename; m_warnOff=s_defaultFileLine.m_warnOff; }
-    FileLine (FileLine* fromp) { m_lineno=fromp->lineno(); m_filename = fromp->filename(); m_warnOff=fromp->m_warnOff; }
+    FileLine (const string& filename, int lineno) { m_lineno=lineno; m_filename = filename; m_warnOn=s_defaultFileLine.m_warnOn; }
+    FileLine (FileLine* fromp) { m_lineno=fromp->lineno(); m_filename = fromp->filename(); m_warnOn=fromp->m_warnOn; }
     FileLine (EmptySecret);
     ~FileLine() { }
 #ifdef VL_LEAK_CHECKS
@@ -223,14 +251,21 @@ public:
     const string filebasename () const;
     const char* cfilename () const { return m_filename.c_str(); }
     const string profileFuncname() const;
-    void warnOff(V3ErrorCode code, bool flag) { m_warnOff.set(code,flag); }	// Turn on/off warning messages on this line.
+    void warnOff(V3ErrorCode code, bool flag) { m_warnOn.set(code,!flag); }	// Turn on/off warning messages on this line.
     bool warnOff(const string& code, bool flag);  // Returns 1 if ok
     bool warnIsOff(V3ErrorCode code) const;
     void warnLintOff(bool flag);
-    void warnStateFrom(const FileLine& from) { m_warnOff=from.m_warnOff; }
+    void warnStateFrom(const FileLine& from) { m_warnOn=from.m_warnOn; }
     void warnStateInherit(const FileLine& from);
     void warnResetDefault() { warnStateFrom(s_defaultFileLine); }
 
+    // Boolean ACCESSORS/METHODS
+    bool coverageOn() const { return m_warnOn.test(V3ErrorCode::I_COVERAGE); }
+    void coverageOn(bool flag) { m_warnOn.set(V3ErrorCode::I_COVERAGE,flag); }
+    bool tracingOn() const { return m_warnOn.test(V3ErrorCode::I_TRACING); }
+    void tracingOn(bool flag) { m_warnOn.set(V3ErrorCode::I_TRACING,flag); }
+
+    // METHODS
     void	v3errorEnd(ostringstream& str);
     inline bool operator==(FileLine rhs) { return (m_lineno==rhs.m_lineno && m_filename==rhs.m_filename); }
 

src/V3Expand.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2004-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2004-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -50,9 +51,13 @@ private:
     // STATE
     AstNode*		m_stmtp;	// Current statement
 
-    //int debug() { return 9; }
-
     // METHODS
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
+
     int longOrQuadWidth (AstNode* nodep) {
 	// Return 32 or 64...
 	return (nodep->width()+(VL_WORDSIZE-1)) & ~(VL_WORDSIZE-1);
@@ -900,14 +905,11 @@ private:
 
 public:
     // CONSTUCTORS
-    ExpandVisitor() {
+    ExpandVisitor(AstNetlist* nodep) {
 	m_stmtp=NULL;
-    }
-    virtual ~ExpandVisitor() {}
-    void main(AstNode* nodep) {
-	AstNode::userClearTree();	// userp() used on entire tree
 	nodep->accept(*this);
     }
+    virtual ~ExpandVisitor() {}
 };
 
 //----------------------------------------------------------------------
@@ -918,6 +920,5 @@ public:
 
 void V3Expand::expandAll(AstNetlist* nodep) {
     UINFO(2,__FUNCTION__<<": "<<endl);
-    ExpandVisitor visitor;
-    visitor.main(nodep);
+    ExpandVisitor visitor (nodep);
 }

src/V3Expand.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3File.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -30,6 +31,7 @@
 #include "V3Global.h"
 #include "V3File.h"
 #include "V3PreShell.h"
+#include "V3Ast.h"
 
 //######################################################################
 // V3File Internal state
@@ -61,7 +63,7 @@ class V3FileDependImp {
 		}
 	    }
 	}
-	bool operator<(const DependFile& rhs) const { return filename()<rhs.filename(); };
+	bool operator<(const DependFile& rhs) const { return filename()<rhs.filename(); }
     };
 
     // MEMBERS
@@ -430,6 +432,16 @@ void V3OutFile::putBreak () {
     }
 }
 
+void V3OutFile::putsQuoted(const char* strg) {
+    // Quote \ and " for use inside C programs
+    // Don't use to quote a filename for #include - #include doesn't \ escape.
+    putcNoTracking('"');
+    string quoted = AstNode::quoteName(strg);
+    for (const char* cp=quoted.c_str(); *cp; cp++) {
+	putcNoTracking (*cp);
+    }
+    putcNoTracking('"');
+}
 void V3OutFile::putsNoTracking (const char *strg) {
     // Don't track {}'s, probably because it's a $display format string
     for (const char* cp=strg; *cp; cp++) {

src/V3File.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -112,6 +113,8 @@ public:
     void puts(const string& strg) { puts(strg.c_str()); }
     void putsNoTracking(const char* strg);
     void putsNoTracking(const string& strg) { putsNoTracking(strg.c_str()); }
+    void putsQuoted(const char* strg);
+    void putsQuoted(const string& strg) { putsQuoted(strg.c_str()); }
     void putBreak();  // Print linebreak if line is too wide
     void putBreakExpr();  // Print linebreak in expression if line is too wide
     void putAlign(bool isstatic/*AlignClass*/, int align, int size=0/*=align*/, const char* prefix=""); // Declare a variable, with natural alignment
@@ -120,7 +123,7 @@ public:
     bool exceededWidth() const { return m_column > WIDTH; }
     bool tokenStart(const char* cp, const char* cmp);
     bool tokenEnd(const char* cp);
-    void indentInc() { m_indentLevel += INDBLK; };
+    void indentInc() { m_indentLevel += INDBLK; }
     void indentDec() {
 	m_indentLevel -= INDBLK;
 	UASSERT(m_indentLevel>=0, ": "<<m_filename<<": Underflow of indentation\n");

src/V3Gate.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -48,7 +49,11 @@ typedef list<AstNodeVarRef*> GateVarRefList;
 
 class GateBaseVisitor : public AstNVisitor {
 public:
-    //int debug() { return 9; }
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
 };
 
 //######################################################################
@@ -229,8 +234,9 @@ class GateVisitor : public GateBaseVisitor {
 private:
     // NODE STATE
     //Entire netlist:
-    // AstVarScope::userp	-> GateVarVertex* for usage var, 0=not set yet
-    // {statement}Node::userp	-> GateLogicVertex* for this statement
+    // AstVarScope::user1p	-> GateVarVertex* for usage var, 0=not set yet
+    // {statement}Node::user1p	-> GateLogicVertex* for this statement
+    AstUser1InUse	m_inuser1;
 
     // STATE
     V3Graph		m_graph;	// Scoreboard of var usages/dependencies
@@ -262,11 +268,11 @@ private:
     }
 
     GateVarVertex* makeVarVertex(AstVarScope* varscp) {
-	GateVarVertex* vertexp = (GateVarVertex*)(varscp->userp());
+	GateVarVertex* vertexp = (GateVarVertex*)(varscp->user1p());
 	if (!vertexp) {
 	    UINFO(6,"New vertex "<<varscp<<endl);
 	    vertexp = new GateVarVertex(&m_graph, m_scopep, varscp);
-	    varscp->userp(vertexp);
+	    varscp->user1p(vertexp);
 	    if (varscp->varp()->isSigPublic()) {
 		// Public signals shouldn't be changed, pli code might be messing with them
 		vertexp->clearReducible("SigPublic");
@@ -293,8 +299,6 @@ private:
 
     // VISITORS
     virtual void visit(AstNetlist* nodep, AstNUser*) {
-	//VV*****  We reset userp() and user2p
-	AstNode::userClearTree();
 	nodep->iterateChildren(*this);
 	//if (debug()>6) m_graph.dump();
 	if (debug()>6) m_graph.dumpDotFilePrefixed("gate_pre");
@@ -316,6 +320,7 @@ private:
 	m_modp = nodep;
 	m_activeReducible = true;
 	nodep->iterateChildren(*this);
+	m_modp = NULL;
     }
     virtual void visit(AstScope* nodep, AstNUser*) {
 	UINFO(4," SCOPE "<<nodep<<endl);
@@ -356,10 +361,21 @@ private:
 	iterateNewStmt(nodep, "User C Function", "User C Function");
     }
     virtual void visit(AstSenItem* nodep, AstNUser*) {
+	// Note we look at only AstSenItems, not AstSenGate's
+	// The gating term of a AstSenGate is normal logic
 	m_inSenItem = true;
-	iterateNewStmt(nodep, NULL, NULL);
+	if (m_logicVertexp) {  // Already under logic; presumably a SenGate
+	    nodep->iterateChildren(*this);
+	} else {  // Standalone item, probably right under a SenTree
+	    iterateNewStmt(nodep, NULL, NULL);
+	}
 	m_inSenItem = false;
     }
+    virtual void visit(AstSenGate* nodep, AstNUser*) {
+	// First handle the clock part will be handled in a minute by visit AstSenItem
+	// The logic gating term is delt with as logic
+	iterateNewStmt(nodep, "Clock gater", "Clock gater");
+    }
     virtual void visit(AstInitial* nodep, AstNUser*) {
 	bool lastslow = m_inSlow;
 	m_inSlow = true;
@@ -372,6 +388,9 @@ private:
     virtual void visit(AstAssignW* nodep, AstNUser*) {
 	iterateNewStmt(nodep, NULL, NULL);
     }
+    virtual void visit(AstCoverToggle* nodep, AstNUser*) {
+	iterateNewStmt(nodep, "CoverToggle", "CoverToggle");
+    }
     virtual void visit(AstTraceInc* nodep, AstNUser*) {
 	bool lastslow = m_inSlow;
 	m_inSlow = true;
@@ -420,7 +439,7 @@ void GateVisitor::optimizeSignals(bool allowMultiIn) {
 		if (!vvertexp->isTop()		// Ok if top inputs are driverless
 		    && !vvertexp->varScp()->varp()->initp()
 		    && !vvertexp->varScp()->varp()->isSigPublic()) {
-		    UINFO(1, "No drivers "<<vvertexp->varScp()<<endl);
+		    UINFO(4, "No drivers "<<vvertexp->varScp()<<endl);
 		    if (0) {
 			// If we warned here after constant propagation, what the user considered
 			// reasonable logic may have disappeared.  Issuing a warning would
@@ -564,7 +583,7 @@ void GateVisitor::replaceAssigns() {
 		//if (debug()>9) {vscp->dumpTree(cout, "-vscDone: "); cout<<endl;}
 		if (!vscp->valuep()->castNodeMath()
 		    || vscp->valuep()->nextp()) {
-		    vscp->dumpTree(cout, "vscStrange: ");
+		    vscp->dumpTree(cerr, "vscStrange: ");
 		    vscp->v3fatalSrc("Value of varscope not mathematical\n");
 		}
 	    }
@@ -669,7 +688,7 @@ void GateVisitor::optimizeElimVar(AstVarScope* varscp, AstNode* substp, AstNode*
 	if (debug()>=9) consumerp->dumpTree(cout,"\telimUseCns: ");
 	//Caution: Can't let V3Const change our handle to consumerp, such as by
 	// optimizing away this assignment, etc.
-	V3Const::constifyTree(consumerp);
+	consumerp = V3Const::constifyEdit(consumerp);
 	if (debug()>=5) consumerp->dumpTree(cout,"\telimUseDne: ");
     }
 }

src/V3Gate.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3GenClk.cpp

@@ -7,9 +7,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -38,7 +39,11 @@
 
 class GenClkBaseVisitor : public AstNVisitor {
 protected:
-    //static int debug() { return 9; }
+    static int debug() {
+	static int level = -1;
+	if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
+	return level;
+    }
 };
 
 //######################################################################
@@ -50,6 +55,8 @@ private:
     // Cleared on top scope
     //  AstVarScope::user2()	-> AstVarScope*.  Signal replacing activation with
     //  AstVarRef::user3()	-> bool.  Signal is replaced activation (already done)
+    AstUser2InUse	m_inuser2;
+    AstUser3InUse	m_inuser3;
 
     // STATE
     AstActive*	m_activep;		// Inside activate statement
@@ -82,7 +89,7 @@ private:
 
     // VISITORS
     virtual void visit(AstTopScope* nodep, AstNUser*) {
-	AstNode::user2ClearTree();	// userp() used on entire tree
+	AstNode::user2ClearTree();	// user2p() used on entire tree
 
 	AstScope* scopep = nodep->scopep();
 	if (!scopep) nodep->v3fatalSrc("No scope found on top level");
@@ -140,6 +147,7 @@ private:
     // NODE STATE
     // Cleared on top scope
     //  AstVarScope::user()	-> bool.  Set when the var has been used as clock
+    AstUser1InUse	m_inuser1;
 
     // STATE
     AstActive*	m_activep;		// Inside activate statement
@@ -148,7 +156,7 @@ private:
 
     // VISITORS
     virtual void visit(AstTopScope* nodep, AstNUser*) {
-	AstNode::userClearTree();	// userp() used on entire tree
+	AstNode::user1ClearTree();	// user1p() used on entire tree
 	nodep->iterateChildren(*this);
 	{
 	    // Make the new clock signals and replace any activate references
@@ -176,9 +184,9 @@ private:
 	if (!vscp) nodep->v3fatalSrc("Scope not assigned");
 	if (m_activep) {
 	    UINFO(8,"  VarAct "<<nodep<<endl);
-	    vscp->user(true);
+	    vscp->user1(true);
 	}
-	if (m_assignp && nodep->lvalue() && vscp->user()) {
+	if (m_assignp && nodep->lvalue() && vscp->user1()) {
 	    // Variable was previously used as a clock, and is now being set
 	    // Thus a unordered generated clock...
 	    UINFO(8,"  VarSetAct "<<nodep<<endl);

src/V3GenClk.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Global.h

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of

src/V3Graph.cpp

@@ -8,9 +8,10 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2008 by Wilson Snyder.  This program is free software; you can
+// Copyright 2003-2009 by Wilson Snyder.  This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// General Public License or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
 //
 // Verilator is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -94,6 +95,26 @@ bool V3GraphVertex::outSize1() const {
     return !outEmpty() && outBeginp()->outNextp()==NULL;
 }
 
+uint32_t V3GraphVertex::inHash() const {
+    // We want the same hash ignoring the order of edges.
+    // So we need an associative operator, like XOR.
+    // However with XOR multiple edges to the same source will cancel out,
+    // so we use ADD.  (Generally call this only after removing duplicates though)
+    uint32_t hash=0;
+    for (V3GraphEdge* edgep = this->inBeginp(); edgep; edgep=edgep->inNextp()) {
+	hash += cvtToHash(edgep->fromp());
+    }
+    return hash;
+}
+
+uint32_t V3GraphVertex::outHash() const {
+    uint32_t hash=0;
+    for (V3GraphEdge* edgep = this->outBeginp(); edgep; edgep=edgep->outNextp()) {
+	hash += cvtToHash(edgep->top());
+    }
+    return hash;
+}
+
 ostream& operator<<(ostream& os, V3GraphVertex* vertexp) {
     os<<"  VERTEX="<<vertexp->name();
     if (vertexp->rank()) os<<" r"<<vertexp->rank();
@@ -176,8 +197,10 @@ void V3Graph::clear() {
 
 void V3Graph::userClearVertices() {
     // Clear user() in all of tree
-    // We may use the userCnt trick in V3Ast later... For now we don't call this often, and
-    // the extra code on each read of user() would probably slow things down more than help.
+    // We may use the userCnt trick in V3Ast later... (but gblCnt would be
+    // in V3Graph instead of static) For now we don't call this often, and
+    // the extra code on each read of user() would probably slow things
+    // down more than help.
     for (V3GraphVertex* vertexp = verticesBeginp(); vertexp; vertexp=vertexp->verticesNextp()) {
 	vertexp->user(0);
 	vertexp->userp(NULL);	 // Its a union, but might be different size than user()
@@ -206,7 +229,7 @@ void V3Graph::clearColors() {
 
 void V3Graph::loopsVertexCb(V3GraphVertex* vertexp) {
     // Needed here as V3GraphVertex<< isn't defined until later in header
-    cout<<"-Info-Loop: "<<(void*)(vertexp)<<" "<<vertexp<<endl;
+    cerr<<"-Info-Loop: "<<(void*)(vertexp)<<" "<<vertexp<<endl;
 }
 
 void V3Graph::dump(ostream& os) {
@@ -254,7 +277,7 @@ void V3Graph::dumpDotFile(const string& filename, bool colorAsSubgraph) {
     // Header
     *logp<<"digraph v3graph {\n";
     *logp<<"\trankdir="<<dotRankDir()<<"\n";
-    *logp<<"\tsize="<<"\"7.5,10\""<<"\n";
+    *logp<<"\t//size="<<"\"7.5,10\""<<"\n";
     *logp<<"\tnTITLE\t[fontsize=20 label=\""<<filename<<"\", shape=box, style=bold, color=black];\n";
     *logp<<"\n";