gcc/testsuite/gcc.dg/div_neg.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 float
   5 div_neg (float x, float y)
   6 {
   7   return (-x / y) * (x / -y);
   8 }
   9
  10 /* { dg-final { scan-tree-dump-times " / " 1 "optimized" } } */