gcc/testsuite/gcc.dg/tree-ssa/recip-3.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fno-trapping-math -funsafe-math-optimizations -fdump-tree-recip" } */
   3
   4 double F[2] = { 0.0, 0.0 }, e;
   5
   6 /* In this case the optimization is interesting.  */
   7 float h ()
   8 {
   9         int i;
  10         double E, W, P, d;
  11
  12         W = 1.1;
  13         d = 2.*e;
  14         E = 1. - d;
  15
  16         for( i=0; i < 2; i++ )
  17                 if( d > 0.01 )
  18                 {
  19                         P = ( W < E ) ? (W - E)/d : (E - W)/d;
  20                         F[i] += P;
  21                 }
  22
  23         F[0] += E / d;
  24 }
  25
  26 /* { dg-final { scan-tree-dump-times " / " 1 "recip" } } */
  27 /* { dg-final { cleanup-tree-dump "recip" } } */