gcc/testsuite/gcc.dg/tree-ssa/ssa-ifcombine-8.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fno-trapping-math -fdump-tree-ifcombine" } */
   3
   4 double test1 (double i, double j)
   5 {
   6   if (i >= j)
   7     if (i <= j)
   8       goto plif;
   9     else
  10       goto plouf;
  11   else
  12     goto plif;
  13
  14 plif:
  15   return 0;
  16 plouf:
  17   return -1;
  18 }
  19
  20 /* The above should be optimized to a i > j test by ifcombine.
  21    The transformation would also be legal with -ftrapping-math.
  22    Instead we get u<=, which is acceptable with -fno-trapping-math.  */
  23
  24 /* { dg-final { scan-tree-dump " u<= " "ifcombine" } } */
  25 /* { dg-final { cleanup-tree-dump "ifcombine" } } */