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[Bug tree-optimization/64434] New: Performance regression after operand canonicalization (r216728).
- From: "ysrumyan at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 29 Dec 2014 15:14:59 +0000
- Subject: [Bug tree-optimization/64434] New: Performance regression after operand canonicalization (r216728).
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64434
Bug ID: 64434
Summary: Performance regression after operand canonicalization
(r216728).
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ysrumyan at gmail dot com
We noticed huge regression on eembc1.1 and eembc2.0 for 32-bit target at x86.
It can be reproduced on attached test-case:
before this fix number of %esp references in assembly was 2 but after r216728 -
24. Note that simple fix resolving this issue was sent for review.