https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114212
Bug ID: 114212 Summary: `MIN<uns, CST> / CST` -> `uns >= CST` 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: ``` unsigned f(unsigned a) { a = a >= 64 ? 64 : a; return a/64; // a >= 64 } ``` This can be simplified to just `a >= 64` as if `a >= 64`, then `MIN<a,64>` would be 64 and `64/64` is 1. Note this is actually true for all non-negative a rather than just unsigned types. For FP types, this can't be done as we won't just get 0,1 for the division but the range [0.,1.].