gcc/testsuite/gcc.dg/fold-div-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-funsafe-math-optimizations -fdump-tree-gimple" } */
   3
   4 float f(float x)
   5 {
   6   return x/2 + x/3;
   7 }
   8
   9 float g(float x)
  10 {
  11   return 2/x + 3/x;
  12 }
  13
  14 float h(float x)
  15 {
  16   return x/2 - x/3;
  17 }
  18
  19 float i(float x)
  20 {
  21   return 2/x - 3/x;
  22 }
  23
  24 /* f and h should be turned into multiplications,
  25    the divisions in g and i should be grouped together.  */
  26
  27 /* { dg-final { scan-tree-dump-times " \\* " 2 "gimple" } } */
  28 /* { dg-final { scan-tree-dump-times " / " 2 "gimple" } } */
  29 /* { dg-final { cleanup-tree-dump "gimple" } } */
  30