https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107946
Bug ID: 107946 Summary: [13 Regression] 507.cactuBSSN_r regresses by ~9% on znver3 with PGO since r13-3875-g9e11ceef165bc0 Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: marxin at gcc dot gnu.org CC: jamborm at gcc dot gnu.org, rguenth at gcc dot gnu.org Blocks: 26163 Target Milestone: --- The revision r13-3875-g9e11ceef165bc0 was supposed to speed up the benchmark, but it makes it slower w/ -O2 -flto and PGO: https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=694.437.0 Similar regression can be seen w/o LTO as well: https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=463.437.0 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)