diff options
Diffstat (limited to 'gcc/match.pd')
| -rw-r--r-- | gcc/match.pd | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/gcc/match.pd b/gcc/match.pd index 60b4ad5f706..3e54e2cf5a6 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -38,7 +38,8 @@ along with GCC; see the file COPYING3. If not see uniform_integer_cst_p HONOR_NANS uniform_vector_p - expand_vec_cmp_expr_p) + expand_vec_cmp_expr_p + bitmask_inv_cst_vector_p) /* Operator lists. */ (define_operator_list tcc_comparison @@ -5207,6 +5208,24 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (eqcmp (bit_and @1 { wide_int_to_tree (ty, mask - rhs); }) { build_zero_cst (ty); })))))) +/* Transform comparisons of the form (X & Y) CMP 0 to X CMP2 Z + where ~Y + 1 == pow2 and Z = ~Y. */ +(for cst (VECTOR_CST INTEGER_CST) + (for cmp (le eq ne ge gt) + icmp (le le gt le gt) + (simplify + (cmp (bit_and:c@2 @0 cst@1) integer_zerop) + (with { tree csts = bitmask_inv_cst_vector_p (@1); } + (switch + (if (csts && TYPE_UNSIGNED (TREE_TYPE (@1)) + && (VECTOR_TYPE_P (TREE_TYPE (@1)) || single_use (@2))) + (icmp @0 { csts; })) + (if (csts && !TYPE_UNSIGNED (TREE_TYPE (@1)) + && (cmp == EQ_EXPR || cmp == NE_EXPR) + && (VECTOR_TYPE_P (TREE_TYPE (@1)) || single_use (@2))) + (with { tree utype = unsigned_type_for (TREE_TYPE (@1)); } + (icmp (convert:utype @0) { csts; })))))))) + /* -A CMP -B -> B CMP A. */ (for cmp (tcc_comparison) scmp (swapped_tcc_comparison) |