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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: "law at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 16 May 2014 15:59:05 +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 #14 from Jeffrey A. Law <law at redhat dot com> ---
I'm not talking about restricting the general case where we've got cascaded
extensions. Just the case where one of the insns in the cascade has a
source/dest that are not the same register. Which is a case we didn't even try
to optimize until 4.9.