gcc/testsuite/gcc.dg/cse_recip.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Ofast -fdump-tree-optimized-raw" } */
   3
   4 void
   5 cse_recip (float x, float y, float *a)
   6 {
   7   a[0] = y / (5 * x);
   8   a[1] = y / (3 * x);
   9   a[2] = y / x;
  10 }
  11
  12 /* { dg-final { scan-tree-dump-times "rdiv_expr" 1 "optimized" } } */