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[Bug rtl-optimization/61094] [4.9/4.10 Regression] -O3 insn Internal compiler error in copyprop_hardreg_forward_1, at regcprop.c:775
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 16 May 2014 08:03:00 +0000
- Subject: [Bug rtl-optimization/61094] [4.9/4.10 Regression] -O3 insn Internal compiler error in copyprop_hardreg_forward_1, at regcprop.c:775
- Auto-submitted: auto-generated
- References: <bug-61094-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61094
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I vaguely remember it has been seen in the wild, not sure how often, but there
were several bugreports about that.
In any case, I'd say it is a pitty to stop optimizing this case for the
unlikely case there is no move insn, the needed pending moves should be around
and thus can be also verified in the wider mode, the question is if we want to
do a linear search for them, or have some faster way to find them.