gcc/testsuite/gcc.dg/add-mul-overflow-1.c

   1 /* { dg-options "-O -fdump-tree-optimized" } */
   2
   3 int res[4];
   4
   5 void
   6 f1 (int x, int y)
   7 {
   8   res[2] = __builtin_add_overflow (x, y, res + 0);
   9   res[3] = __builtin_add_overflow (y, x, res + 1);
  10 }
  11
  12 void
  13 f2 (int x, int y)
  14 {
  15   res[2] = __builtin_sub_overflow (x, y, res + 0);
  16   res[3] = __builtin_sub_overflow (y, x, res + 1);
  17 }
  18
  19 void
  20 f3 (int x, int y)
  21 {
  22   res[2] = __builtin_mul_overflow (x, y, res + 0);
  23   res[3] = __builtin_mul_overflow (y, x, res + 1);
  24 }
  25
  26 /* { dg-final { scan-tree-dump-times {\.ADD_OVERFLOW} 1 "optimized" } } */
  27 /* { dg-final { scan-tree-dump-times {\.SUB_OVERFLOW} 2 "optimized" } } */
  28 /* { dg-final { scan-tree-dump-times {\.MUL_OVERFLOW} 1 "optimized" } } */