Commentary: Changes update
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Wilson Snyder
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Changes
16
Changes
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@ -11,6 +11,11 @@ contributors that suggested or implemented a given issue are shown in []. Thanks
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Verilator 5.047 devel
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==========================
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**Important:**
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* Support jemalloc as the default allocator on Linux (#7250). [Yangyu Chen]
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For better performance, `apt install libjemalloc-dev` or equivalent before running ./configure.
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**Other:**
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* Support inout inside SV interface (#3466) (#7134). [Nick Brereton]
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@ -24,6 +29,10 @@ Verilator 5.047 devel
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* Support Z non-blocking assignment (#7192) (#496) (#7197). [Nick Brereton]
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* Support constraint `with` item.index array reduction (#7198). [Rahul Behl]
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* Support constant expressions without parentheses in `PATHPULSE$` (#7199). [Pawel Kojma, Antmicro Ltd.]
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* Support $sformat with runtime format string (#7212).
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* Support dist and solve...before inside foreach constraints (#7245) (#7253). [Yilou Wang]
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* Support array and struct info metadata in FST traces (#7255). [Geza Lore, Testorrent USA, Inc.]
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* Support dynamic array .size in inline randomize() with constraints (#7258) (#7266). [Yilou Wang]
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* Add VPI callback support to --main (#7145).
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* Add V3LiftExpr pass to lower impure expressions and calls (#7141) (#7164). [Geza Lore, Testorrent USA, Inc.]
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* Add --func-recursion-depth CLI option (#7175) (#7179).
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@ -34,11 +43,14 @@ Verilator 5.047 devel
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* Optimize function call return value temporaries (#7152). [Geza Lore, Testorrent USA, Inc.]
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* Optimize conditional merging across some impure statements (#7159). [Geza Lore, Testorrent USA, Inc.]
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* Fix recursive default assignment for sub-arrays (#4589) (#7202). [Julian Carrier]
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* Fix shift width mismatch in constraint solver SMT emission (#5420) (#7265). [Yilou Wang]
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* Fix randomize size+element queue constraints (#5582) (#7225). [Rahul Behl, Testorrent USA, Inc.]
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* Fix lambda coroutines (#6106) (#7135). [Nick Brereton]
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* Fix super constructor calls with local variables (#6214) (#6933). [Igor Zaworski, Antmicro Ltd.]
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* Fix false recursive definition error (#6769) (#7118). [Alex Zhou]
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* Fix interface localparam dependencies and arbitrary nesting (#6936) (#7128) (#7188) (#7190). [em2machine]
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* Fix errant integer promotion (#7012). [Todd Strader]
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* Fix randc solver hang with wide variables (#7068) (#7248). [Yilou Wang]
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* Fix scheduling non-determinism (#7120) (#7162) (#7165). [Geza Lore, Testorrent USA, Inc.]
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* Fix parameters inside std::randomize `with` clause (#7140). [Kamil Danecki, Antmicro Ltd.]
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* Fix forcing unpacked variables (#7149). [Ryszard Rozak, Antmicro Ltd.]
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@ -50,12 +62,16 @@ Verilator 5.047 devel
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* Fix library/hier_block tracing when top name is empty (#7200). [Geza Lore, Testorrent USA, Inc.]
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* Fix wrong $bits() for parameterized interface struct typedefs (#7218) (#7219). [em2machine]
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* Fix `dist` operator inside constraint if blocks (#7221) (#7224). [Rahul Behl, Testorrent USA, Inc.]
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* Fix array reduction in constraints crashing with class inheritance (#7226) (#7263). [Yilou Wang]
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* Fix soft cross-object constraint priority inversion (#7228) (#7233). [Yilou Wang]
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* Fix internal error when derived class calls this.randomize() with inherited rand members (#7229) (#7234). [Yilou Wang]
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* Fix enum range constraints missing for rand variables in sub-objects (#7230) (#7235). [Yilou Wang]
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* Fix vpi_put_value release on non-continuous signal (#7231) (#7241). [Christian Hecken]
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* Fix tracing of typedefed 1D packed arrays with --trace-structs (#7237). [Geza Lore, Testorrent USA, Inc.]
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* Fix rand variable used as array index in constraint evaluated as constant (#7238) (#7247). [Yilou Wang]
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* Fix --hierarchical dropping arguments in -f/-F files (#7240). [Clara Sparks]
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* Fix `final` asserts and $stop (#7249). [Artur Bieniek, Antmicro Ltd.]
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* Fix vpi_put_value with vpiIntVal on VlWide data (#7256). [Christian Hecken]
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Verilator 5.046 2026-02-28
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@ -16,3 +16,8 @@ C++14 compiler support
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(Although this date has expired, this change is currently on hold until
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the Ubuntu LTS versions of GCC and clang use C++20 by default, estimated
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May 2028.)
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tcmalloc support
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Verilator currently supports the default malloc, tcmalloc, or jemalloc.
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As jemalloc has better performance, support for tcmalloc may be removed
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no sooner than January 2026.
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@ -739,6 +739,7 @@ There are two functions for managing timing logic called by ``_eval()``:
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schedulers whose triggers were set in the current iteration.
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Thanks to this separation a coroutine:
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* awaiting a trigger cannot be suspended and resumed in the same iteration
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(``test_regress/t/t_timing_eval_act.v``) - which is necessary to make
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Verilator more predictable; this is the reason for introduction of 3rd stage
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@ -878,6 +878,7 @@ iostream
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ish
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isunbounded
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isunknown
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jemalloc
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jobserver
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json
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jwoutersymatra
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@ -891,6 +892,7 @@ len
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libc
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libext
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libgoogle
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libjemalloc
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liblist
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libsystemc
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libtcmalloc
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@ -917,6 +919,7 @@ lxt
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macromodule
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makefile
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makefiles
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malloc
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manpages
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metacomment
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metacomments
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@ -1146,6 +1149,7 @@ sys
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systemc
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taskify
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tcmalloc
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tcmalloc
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tenghtt
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testbench
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threadsafe
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@ -1239,6 +1243,7 @@ vpiConstType
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vpiDefName
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vpiInertialDelay
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vpiInstance
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vpiIntVal
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vpiLeftRange
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vpiModule
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vpiSigned
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@ -56,7 +56,7 @@ class ImplicationShift;
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endclass
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module t;
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AlignedPacket pkt1;
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AlignedPacket pkt1;
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ConstShiftPacket pkt2;
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ImplicationShift pkt3;
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int ok;
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@ -4,11 +4,11 @@
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// SPDX-FileCopyrightText: 2026 Antmicro
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// SPDX-License-Identifier: CC0-1.0
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module tb();
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initial begin
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$finish();
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end
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final begin
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assert(1 == 0);
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end
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module tb ();
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initial begin
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$finish();
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end
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final begin
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assert (1 == 0);
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end
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endmodule
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@ -6,18 +6,18 @@
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module t;
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class uvm_built_in_comp #(
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type T = int
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type T = int
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);
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endclass
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class uvm_in_order_comparator #(
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type T = int,
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type comp_type = uvm_built_in_comp#(T)
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type T = int,
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type comp_type = uvm_built_in_comp#(T)
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);
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endclass
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class uvm_in_order_built_in_comparator #(
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type T = int
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type T = int
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) extends uvm_in_order_comparator #(T);
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endclass
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