https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112915
Bug ID: 112915 Summary: [14 Regression] ~4-11% exec time regression of 454.calculix on AMD Zen2 Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: needs-bisection Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: fkastl at suse dot cz Target Milestone: --- Host: x86_64-linux Target: x86_64-linux Between commits g:cff1fa6625d1273f and g:8b9d0e8cf482287b there's a slowdown of 454.calculix 2006 SPEC. 11% regression seen on the graph here (Zen2 machine): https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=288.170.0 I've also replicated this on another Zen2 machine and got 4% slowdown. I haven't seen this slowdown on other architectures.