gcc/testsuite/gcc.dg/tree-ssa/pr23109.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funsafe-math-optimizations -ftrapping-math -fdump-tree-recip -fdump-tree-lim2" } */
   3 /* { dg-warning "'-fassociative-math' disabled" "" { target *-*-* } 0 } */
   4
   5 double F[2] = { 0., 0. }, e = 0.;
   6
   7 int main()
   8 {
   9         int i;
  10         double E, W, P, d;
  11
  12         /* make sure the program crashes on FP exception */
  13         unsigned short int Mask;
  14
  15         W = 1.;
  16         d = 2.*e;
  17         E = 1. - d;
  18
  19         for( i=0; i < 2; i++ )
  20                 if( d > 0.01 )
  21                 {
  22                         P = ( W < E ) ? (W - E)/d : (E - W)/d;
  23                         F[i] += P;
  24                 }
  25
  26         return 0;
  27 }
  28
  29 /* LIM only performs the transformation in the no-trapping-math case.  In
  30    the future we will do it for trapping-math as well in recip, check that
  31    this is not wrongly optimized.  */
  32 /* { dg-final { scan-tree-dump-not "reciptmp" "lim2" } } */
  33 /* { dg-final { scan-tree-dump-not "reciptmp" "recip" } } */
  34