gcc/testsuite/gcc.dg/tree-ssa/reassoc-16.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ffast-math -fdump-tree-reassoc1" } */
   3
   4 double test1 (double x, double y, double z, double weight)
   5 {
   6   double tmp1 = x / weight;
   7   double tmp2 = y / weight;
   8   double tmp3 = -x / weight;
   9   return tmp1 + tmp2 + tmp3;
  10 }
  11
  12 /* The division should be un-distributed and all references to x should
  13    be gone.  */
  14
  15 /* { dg-final { scan-tree-dump-times "/" 1 "reassoc1" } } */