https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111432
Bug ID: 111432 Summary: `bool & (a|1)` is not optimized to just `bool` Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: enhancement Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: pinskia at gcc dot gnu.org Target Milestone: --- take: ``` int foo3(int c, int bb) { if ((bb & ~3)!=0) __builtin_unreachable(); return (bb & (c|3)); } int foo_bool(int c, _Bool bb) { return (bb & (c|7)); } ``` foo3 should be optimized to just `return bb`, likewise for foo_bool. Note LLVM does this.