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[Bug tree-optimization/55334] [4.8/4.9 Regression] mgrid regression (ipa-cp disables vectorization)
- From: "chris_s_jones at yahoo dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 10 Jul 2013 23:54:20 +0000
- Subject: [Bug tree-optimization/55334] [4.8/4.9 Regression] mgrid regression (ipa-cp disables vectorization)
- Auto-submitted: auto-generated
- References: <bug-55334-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55334
Chris Jones <chris_s_jones at yahoo dot com> changed:
What |Removed |Added
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CC| |chris_s_jones at yahoo dot com
--- Comment #32 from Chris Jones <chris_s_jones at yahoo dot com> ---
I'm curious if the original 172.mgrid regression is believed to still exist in
GCC 4.8.1. I notice that ipa-cp.c has Martin's special case for RESTRICT
pointers, yet building 172.mgrid for AArch64 seems to result in an inlined
version of resid_() which does not get vectorized. Using -fno-inline-functions
(or alternatively --param inline-min-speedup=17) produces code which runs
significantly faster. It's remotely possible that I have some local edits
which are causing the regression, but I suspect that the issue is still present
for the mgrid case and wanted to verify that before attempting another
work-around.