luke
/
iverilog
mirror of https://github.com/steveicarus/iverilog.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Delete unreferenced signals no matter what.

This commit is contained in:
steve 2000-11-18 05:12:45 +00:00
parent da926fa08b
commit ff5846100c
1 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
nodangle.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/ */
#if !defined(WINNT) && !defined(macintosh) #if !defined(WINNT) && !defined(macintosh)
#ident "$Id: nodangle.cc,v 1.8 2000/06/25 19:59:42 steve Exp $" #ident "$Id: nodangle.cc,v 1.9 2000/11/18 05:12:45 steve Exp $"
#endif #endif
/* /*
@ -52,12 +52,12 @@ void nodangle_f::event(Design*des, NetEvent*ev)
void nodangle_f::signal(Design*des, NetNet*sig) void nodangle_f::signal(Design*des, NetNet*sig)
{ {
if (! sig->local_flag()) /* Cannot delete signals referenced in an expression. */
return;
if (sig->get_eref() > 0) if (sig->get_eref() > 0)
return; return;
/* Look for a completely unconnected signal. */ /* Check to see if the signal is completely unconnected. If
all the bits are unlinked, then delete it. */
unsigned unlinked = 0; unsigned unlinked = 0;
for (unsigned idx = 0 ; idx < sig->pin_count() ; idx += 1) for (unsigned idx = 0 ; idx < sig->pin_count() ; idx += 1)
if (! sig->pin(idx).is_linked()) unlinked += 1; if (! sig->pin(idx).is_linked()) unlinked += 1;
@ -67,6 +67,11 @@ void nodangle_f::signal(Design*des, NetNet*sig)
return; return;
} }
/* The remaining things can only be done to synthesized
signals, not ones that appear in the original Verilog. */
if (! sig->local_flag())
return;
/* Check to see if there is some significant signal connected /* Check to see if there is some significant signal connected
to every pin of this signal. */ to every pin of this signal. */
unsigned significant_flags = 0; unsigned significant_flags = 0;
@ -105,6 +110,9 @@ void nodangle(Design*des)
/* /*
* $Log: nodangle.cc,v $ * $Log: nodangle.cc,v $
* Revision 1.9 2000/11/18 05:12:45 steve
* Delete unreferenced signals no matter what.
*
* Revision 1.8 2000/06/25 19:59:42 steve * Revision 1.8 2000/06/25 19:59:42 steve
* Redesign Links to include the Nexus class that * Redesign Links to include the Nexus class that
* carries properties of the connected set of links. * carries properties of the connected set of links.