https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78116
Bug ID: 78116 Summary: [7 regression] Performance drop after r241173 on avx512 target Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: ysrumyan at gmail dot com Target Milestone: --- I attached the simple test-case to reproduce issue. Before this revision loop marked with label .L27 has 25 instructions but after it additional fills were added and it has +8 more instructions. In result we got > 6% performance drop on important benchmark.