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[Bug tree-optimization/56321] [4.8 Regression] ICE:segfault in midend for -funsafe-math-optimizations -O3
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 15 Feb 2013 09:43:36 +0000
- Subject: [Bug tree-optimization/56321] [4.8 Regression] ICE:segfault in midend for -funsafe-math-optimizations -O3
- Auto-submitted: auto-generated
- References: <bug-56321-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56321
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> 2013-02-15 09:43:36 UTC ---
(In reply to comment #7)
> I see. The problem is a memory VUSE on the return statement that no longer has
> a def. The VDEF was associated with the __builtin_pow statement that was
> expanded. Looks like I need to release the SSA name. Working on a fix.
Use unlink_stmt_vdef when removing a stmt that possibly has a VDEF.