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[Bug lto/66752] spec2000 255.vortex performance compiled with GCC is ~20% lower than with CLANG
- From: "ysrumyan at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 10 Jul 2015 16:27:12 +0000
- Subject: [Bug lto/66752] spec2000 255.vortex performance compiled with GCC is ~20% lower than with CLANG
- Auto-submitted: auto-generated
- References: <bug-66752-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66752
--- Comment #4 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Created attachment 35947
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35947&action=edit
test-case to reproduce
compile with -Ofast -m32 -march=slm and notice redundant test
.L30:
testl %edx, %edx
je .L1