diff options
Diffstat (limited to 'gcc/match.pd')
| -rw-r--r-- | gcc/match.pd | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/match.pd b/gcc/match.pd index 7e22771..c1e0963 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -102,6 +102,17 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (match (nop_convert @0) @0) +/* Transform likes of (char) ABS_EXPR <(int) x> into (char) ABSU_EXPR <x> + ABSU_EXPR returns unsigned absolute value of the operand and the operand + of the ABSU_EXPR will have the corresponding signed type. */ +(simplify (abs (convert @0)) + (if (ANY_INTEGRAL_TYPE_P (TREE_TYPE (@0)) + && !TYPE_UNSIGNED (TREE_TYPE (@0)) + && element_precision (type) > element_precision (TREE_TYPE (@0))) + (with { tree utype = unsigned_type_for (TREE_TYPE (@0)); } + (convert (absu:utype @0))))) + + /* Simplifications of operations with one constant operand and simplifications to constants or single values. */ |