gcc/testsuite/gcc.dg/tree-ssa/vrp05.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-vrp1 -fno-early-inlining" } */
   3
   4
   5 inline int ten()
   6 {
   7   return 10;
   8 }
   9 inline int zero()
  10 {
  11   return 0;
  12 }
  13
  14 foo (int k, int j)
  15 {
  16   if (k >= ten())
  17     {
  18       if (j > k)
  19         {
  20           /* We should fold this to if (1).  */
  21           if (j > zero())
  22             return j;
  23         }
  24     }
  25
  26   return j+1;
  27 }
  28
  29 /* { dg-final { scan-tree-dump-times "Folding predicate j_.*to 1" 1 "vrp1" } } */
  30 /* { dg-final { cleanup-tree-dump "vrp1" } } */