[Bug tree-optimization/71361] [7 Regression] Changes in ivopts caused perf regression on x86
amker at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed Jun 1 07:59:00 GMT 2016
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71361
amker at gcc dot gnu.org changed:
What |Removed |Added
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CC| |amker at gcc dot gnu.org
--- Comment #1 from amker at gcc dot gnu.org ---
It doesn't look like a regression from the dump, I suspect it's because how gcc
handles symbol (arr_1/arr_2) in m32 PIE code. I will have a look.
BTW, the patch itself is right, it triggers cost model issue again in which
wrong/inaccurate cost gives better result. I am doing experiments rewriting
the whole cost computation part.
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