https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102809
Bug ID: 102809 Summary: Some TSVC benchmarks are slower after r12-4195-gec0124e0acb556cd Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: marxin at gcc dot gnu.org CC: aldyh at gcc dot gnu.org Target Milestone: --- Tested with https://github.com/UoB-HPC/TSVC_2/pull/2 where one can run a single benchmark. Happens with -Ofast -march=native on znver1 machine: gcc-bisect.py 'gcc *.c -lm -Ofast -march=native -fuse-ld=bfd && timeout 100.7 ./a.out va' -l -e r12-4194-g1f51e9af7b615838 -s r12-4195-gec0124e0acb556cd Bisecting latest revisions ec0124e0acb556cd(05 Oct 2021 18:24)(al...@redhat.com): [took: 7.050s] result: OK Loop Time(sec) Checksum va 3.719 1.644725 1f51e9af7b615838(05 Oct 2021 16:47)(jwak...@redhat.com): [took: 5.433s] result: OK Loop Time(sec) Checksum va 2.006 1.644725 and can be seen here: https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=14.920.0 https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=14.887.0 https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=14.943.0