diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/match.pd | 10 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr96232-1.c | 11 |
2 files changed, 21 insertions, 0 deletions
diff --git a/gcc/match.pd b/gcc/match.pd index 68201ff..43bacb4 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -3812,6 +3812,16 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (cnd (logical_inverted_value truth_valued_p@0) @1 @2) (cnd @0 @2 @1))) +/* -(type)!A -> (type)A - 1. */ +(simplify + (negate (convert?:s (logical_inverted_value:s @0))) + (if (INTEGRAL_TYPE_P (type) + && TREE_CODE (type) != BOOLEAN_TYPE + && TYPE_PRECISION (type) > 1 + && TREE_CODE (@0) == SSA_NAME + && ssa_name_has_boolean_range (@0)) + (plus (convert:type @0) { build_all_ones_cst (type); }))) + /* A + (B vcmp C ? 1 : 0) -> A - (B vcmp C ? -1 : 0), since vector comparisons return all -1 or all 0 results. */ /* ??? We could instead convert all instances of the vec_cond to negate, diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr96232-1.c b/gcc/testsuite/gcc.dg/tree-ssa/pr96232-1.c new file mode 100644 index 0000000..3170ffd --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr96232-1.c @@ -0,0 +1,11 @@ +/* PR tree-optimization/96232 */ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ +/* { dg-final { scan-tree-dump " \\+ -1;" "optimized" } } */ +/* { dg-final { scan-tree-dump-not "~x_\[0-9]*\\\(D\\\)" "optimized" } } */ + +int +foo (_Bool x) +{ + return x ? 0 : -1; +} |