gcc/testsuite/gcc.dg/tree-ssa/pr21582.c

   1 /* { dg-do link }  */
   2 /* { dg-options "-O2 -fdump-tree-vrp1" }  */
   3
   4 void link_error (void);
   5
   6 static inline void do_thing(char *s, int *p, char *q)
   7 {
   8         /* This should be folded away.  */
   9         if (s == 0 || q == 0)
  10                 link_error ();
  11
  12         /* This should not be folded as 'p' is not marked nonnull.  */
  13         if (p)
  14                 *p = 3;
  15 }
  16
  17 void __attribute__((nonnull (1, 3))) do_other_thing(char *s, int *p, char *q)
  18 {
  19         do_thing(s, p, q);
  20 }
  21
  22 int i;
  23
  24 int
  25 main()
  26 {
  27   do_other_thing ("xxx", &i, "yyy");
  28 }
  29
  30 /* { dg-final { scan-tree-dump-times "Folding predicate p_.*" 0 "vrp1" } } */