https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109797
Bug ID: 109797
Summary: 456.hmmer compiled with -O2 -flto regressed by 15% on
AMD zen3 between r14-487-g6f18f344338b37 and
r14-540-gb7fe38c14e5f1b
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
Blocks: 26163
Target Milestone: ---
The SPEC 2006 benchmark compiled with -O2 and -flto regressed by 14% on Zen3 as
can be seen at:
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=469.180.0
Unfortunately I cannot see a similar issue on other machines, not even on zen2
or the Intel x86_64 we run benchmarks on. (That is why I chose the component
to be target even though it is little more than a wild guess.)
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
