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[Bug rtl-optimization/78116] New: [7 regression] Performance drop after r241173 on avx512 target
- From: "ysrumyan at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 26 Oct 2016 14:23:28 +0000
- Subject: [Bug rtl-optimization/78116] New: [7 regression] Performance drop after r241173 on avx512 target
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78116
Bug ID: 78116
Summary: [7 regression] Performance drop after r241173 on
avx512 target
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ysrumyan at gmail dot com
Target Milestone: ---
I attached the simple test-case to reproduce issue.
Before this revision loop marked with label .L27 has 25 instructions but
after it additional fills were added and it has +8 more instructions.
In result we got > 6% performance drop on important benchmark.