https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114468
Bug ID: 114468
Summary: unixbench compilation performance results vary with
different gcc compilers
Product: gcc
Version: 10.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jiangchuanganghw at outlook dot com
Target Milestone: ---
We used Unixbench to compare gcc 10.3.0 with gcc8.5 on an intel Sapphire Rapids
CPU and found that the performance of the dhry2reg test project compiled with
gcc 10.3.0 deteriorated by about 10%. We found that this commit affected
performance, and after rolling back the changes in that patch, performance was
restored.
https://github.com/gcc-mirror/gcc/commit/3133bed5d0327e8a9cd0a601b7ecdb9de4fc825d
We expect to find the cause of this result.Looking forward to your help.
