diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c index 0e377b1b1f8f..6ac3460d538b 100644 --- a/gcc/internal-fn.c +++ b/gcc/internal-fn.c @@ -3834,6 +3834,8 @@ commutative_binary_fn_p (internal_fn fn) case IFN_COMPLEX_MUL: case IFN_UBSAN_CHECK_ADD: case IFN_UBSAN_CHECK_MUL: + case IFN_ADD_OVERFLOW: + case IFN_MUL_OVERFLOW: return true; default: diff --git a/gcc/testsuite/gcc.dg/add-mul-overflow-1.c b/gcc/testsuite/gcc.dg/add-mul-overflow-1.c new file mode 100644 index 000000000000..b23cdddbb631 --- /dev/null +++ b/gcc/testsuite/gcc.dg/add-mul-overflow-1.c @@ -0,0 +1,28 @@ +/* { dg-options "-O -fdump-tree-optimized" } */ + +int res[4]; + +void +f1 (int x, int y) +{ + res[2] = __builtin_add_overflow (x, y, res + 0); + res[3] = __builtin_add_overflow (y, x, res + 1); +} + +void +f2 (int x, int y) +{ + res[2] = __builtin_sub_overflow (x, y, res + 0); + res[3] = __builtin_sub_overflow (y, x, res + 1); +} + +void +f3 (int x, int y) +{ + res[2] = __builtin_mul_overflow (x, y, res + 0); + res[3] = __builtin_mul_overflow (y, x, res + 1); +} + +/* { dg-final { scan-tree-dump-times {\.ADD_OVERFLOW} 1 "optimized" } } */ +/* { dg-final { scan-tree-dump-times {\.SUB_OVERFLOW} 2 "optimized" } } */ +/* { dg-final { scan-tree-dump-times {\.MUL_OVERFLOW} 1 "optimized" } } */