gcc/testsuite/gcc.dg/fma-3.c

   1 /* { dg-options "-O2 -fdump-tree-widening_mul" } */
   2
   3 float
   4 f1 (float a, float b, float c)
   5 {
   6   return c - a * b;
   7 }
   8
   9 double
  10 f2 (double a, double b, double c)
  11 {
  12   return c - a * b;
  13 }
  14
  15 /* { dg-final { scan-tree-dump-times { = \.FNMA \(} 2 "widening_mul" { target scalar_all_fma } } } */