https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120749
Bug ID: 120749 Summary: [16 Regression] 5% slowdown of 548.exchange2_r on Aarch64 Product: gcc Version: 16.0 Status: UNCONFIRMED Keywords: missed-optimization, needs-bisection Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: pheeck at gcc dot gnu.org Blocks: 26163 Target Milestone: --- Host: aarch64-gnu-linux Target: aarch64-gnu-linux As seen here https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=589.407.0 there was a 5% exec time slowdown of 548.exchange2_r SPEC 2017 benchmark between commits r16-1360-gfce42e15063e76 (2025-06-10) r16-1494-g59fbc99f8ee35f (2025-06-13) when run with -Ofast -march=native -flto -fprofile-use on an Ampere Altra (Neoverse N1) machine. 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)