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 e(float a, float b, float c, float d, float e, float f)
   5 {
   6   if (a < b)
   7     {
   8       a = a + b;
   9       c = c + d;
  10     }
  11
  12   /* The PHI nodes for these divisions should be combined.  */
  13   d = d / a;
  14   e = e / a;
  15   f = f / a;
  16
  17   a = a / c;
  18   b = b / c;
  19
  20   /* This should not be left as a multiplication.  */
  21   c = 1 / c;
  22
  23   return a + b + c + d + e + f;
  24 }
  25
  26 /* { dg-final { scan-tree-dump-times " / " 2 "recip" } } */
  27 /* { dg-final { scan-tree-dump-times " \\* " 5 "recip" } } */
  28 /* { dg-final { cleanup-tree-dump "recip" } } */