gcc/testsuite/gcc.dg/tree-ssa/pr21959.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-vrp1" } */
   3
   4 unsigned char c[0xFF];
   5 void f(void)
   6 {
   7   unsigned char i;
   8   c[128] = 128;
   9   i = 0;
  10   while (1)
  11   {
  12     /* This predicate should not be folded out.  */
  13     if (((signed char) i) < 0) break;
  14     c[i] = ' ';
  15     i++;
  16   }
  17 }
  18
  19 /* { dg-final { scan-tree-dump-times "Folding predicate " 0 "vrp1" } } */