https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65135
Bug ID: 65135
Summary: Performance regression in pic mode after r220674.
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ysrumyan at gmail dot com
We noticed 10% regression on one important benchmark using for testing x86
32-bit platforms. This regression can be reproduced on attached test-case: one
more fill is present in innermost loop after r220674. One possible decision is
spillong live phisical registers not referenced in (innermost) loops
(GOT-register in out test-case) in loop preheader with subsequent restore it in
loop post header. Note that regression can be seen only in pic mode for 32-bit
x86 platform.
