gcc/testsuite/gcc.dg/tree-ssa/reassoc-27.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -ffast-math -frounding-math -fdump-tree-optimized" } */
   3
   4 double baz (double foo, double bar)
   5 {
   6   return foo * foo * foo * foo * bar * bar * bar * bar;
   7 }
   8
   9 /* We should re-associate this as (foo * bar)**3.  */
  10 /* { dg-final { scan-tree-dump-times " \\\* " 3 "optimized" } } */
  11 /* { dg-final { cleanup-tree-dump "optimized" } } */