gcc/testsuite/gcc.dg/tree-ssa/pr20318.c

   1 /* { dg-do compile { target { ! keeps_null_pointer_checks } } } */
   2 /* { dg-options "-O2 -fdump-tree-original -fdump-tree-vrp1 -fdelete-null-pointer-checks -fdisable-tree-evrp" } */
   3
   4 extern int* f(int) __attribute__((returns_nonnull));
   5 extern void eliminate ();
   6 void g () {
   7   if (f (2) == 0)
   8     eliminate ();
   9 }
  10 void h () {
  11   int *p = f (2);
  12   if (p == 0)
  13     eliminate ();
  14 }
  15
  16 /* { dg-final { scan-tree-dump-times "== 0" 1 "original" } } */
  17 /* { dg-final { scan-tree-dump-times "Folding predicate\[^\\n\]*to 0" 1 "vrp1" } } */