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Jakub Jelinek
authored
These 2 patterns are incorrect on floating point, or for -fwrapv, or for -ftrapv, or the first one for unsigned types (the second one is mathematically correct, but we ought to just fold that to 0 instead). So, the following patch properly guards this. I think we don't need && !TYPE_OVERFLOW_SANITIZED (type) because in both simplifications there would be UB before and after on signed integer minimum. 2024-02-26 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/114090 * match.pd ((x >= 0 ? x : 0) + (x <= 0 ? -x : 0) -> abs x): Restrict pattern to ANY_INTEGRAL_TYPE_P and TYPE_OVERFLOW_UNDEFINED types. ((x <= 0 ? -x : 0) -> max(-x, 0)): Likewise. * gcc.dg/pr114090.c: New test.