https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103228
Bug ID: 103228 Summary: [9/10/11/12 Regression] missed optimization with |^ at the gimple level Product: gcc Version: 12.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: pinskia at gcc dot gnu.org Target Milestone: --- Take: int f(int a, int b) { b|=1u; b|=2; return b; } ----- CUT --- This no longer gets optimized at the gimple level but it did in 4.7.x. This is also true for ^. I Noticed this while writing testcases for PR 103216.