gcc/testsuite/gcc.dg/tree-ssa/reassoc-14.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-reassoc1" } */
   3
   4 unsigned int test1 (unsigned int x, unsigned int y, unsigned int z,
   5                     unsigned int weight)
   6 {
   7   unsigned int tmp1 = x * weight;
   8   unsigned int tmp2 = y * weight;
   9   unsigned int tmp3 = (x - y) * weight;
  10   return tmp1 + (tmp2 + tmp3);
  11 }
  12
  13 unsigned int test2 (unsigned int x, unsigned int y, unsigned int z,
  14                     unsigned int weight)
  15 {
  16   unsigned int tmp1 = x * weight;
  17   unsigned int tmp2 = y * weight * weight;
  18   unsigned int tmp3 = z * weight * weight * weight;
  19   return tmp1 + tmp2 + tmp3;
  20 }
  21
  22 /* There should be two multiplication left in test1 (inculding one generated
  23    when converting addition to multiplication) and three in test2.  */
  24
  25 /* { dg-final { scan-tree-dump-times "\\\*" 5 "reassoc1" } } */