gcc/testsuite/gcc.dg/pr50717-1.c

   1 /* PR tree-optimization/50717  */
   2 /* Ensure that widening multiply-and-accumulate is not used where integer
   3    type promotion or users' casts should prevent it.  */
   4
   5 /* { dg-options "-O2 -fdump-tree-widening_mul" } */
   6
   7 long long
   8 f (unsigned int a, char b, long long c)
   9 {
  10   return (a * b) + c;
  11 }
  12
  13 int
  14 g (short a, short b, int c)
  15 {
  16   return (short)(a * b) + c;
  17 }
  18
  19 int
  20 h (char a, char b, int c)
  21 {
  22   return (char)(a * b) + c;
  23 }
  24
  25 /* { dg-final { scan-tree-dump-times "WIDEN_MULT_PLUS_EXPR" 0 "widening_mul" } } */