https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97085
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- The following also works, and we then expand from mask__31.28_102 = vect__50.25_95 != { 5, ... }; vect_patt_63.29_105 = VEC_COND_EXPR <mask__31.28_102, { 1, ... }, { 0, ... }>; diff --git a/gcc/match.pd b/gcc/match.pd index 7d63bb973cb..e6dcdd0b855 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -3521,6 +3521,17 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (if (optimize_vectors_before_lowering_p () && types_match (@0, @1)) (vec_cond (bit_and (bit_not @0) @1) @2 @3))) +/* Canonicalize mask ? { 0, ... } : { -1, ...} to ~mask if the mask + types are compatible. */ +(simplify + (vec_cond @0 VECTOR_CST@1 VECTOR_CST@2) + (if (VECTOR_BOOLEAN_TYPE_P (type) + && types_match (type, TREE_TYPE (@0))) + (if (integer_zerop (@1) && integer_all_onesp (@2)) + (bit_not @0) + (if (integer_all_onesp (@1) && integer_zerop (@2)) + @0)))) + /* Simplification moved from fold_cond_expr_with_comparison. It may also be extended. */ /* This pattern implements two kinds simplification: