gcc/testsuite/gcc.dg/tree-ssa/recip-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -funsafe-math-optimizations -fdump-tree-recip" } */
   3
   4 float u, v, w, x, y, z;
   5
   6 void e(float a, float b, float c, float d, float e, float f)
   7 {
   8   if (a < b)
   9     {
  10       a = a + b;
  11       c = c + d;
  12     }
  13
  14   /* The PHI nodes for these divisions should be combined.  */
  15   d = d / a;
  16   e = e / a;
  17   f = f / a;
  18
  19   a = a / c;
  20   b = b / c;
  21
  22   /* This should not be left as a multiplication.  */
  23   c = 1 / c;
  24
  25   u = a;
  26   v = b;
  27   w = c;
  28   x = d;
  29   y = e;
  30   z = f;
  31 }
  32
  33 /* { dg-final { scan-tree-dump-times " / " 2 "recip" } } */
  34 /* { dg-final { scan-tree-dump-times " \\* " 5 "recip" } } */