gcc/testsuite/gcc.dg/tree-ssa/vrp15.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-vrp1" } */
   3
   4
   5 extern void abort (void) __attribute__ ((__noreturn__));
   6 union tree_node;
   7 typedef union tree_node *tree;
   8 enum tree_code
   9 {
  10   ERROR_MARK,
  11   COND_EXPR = 42,
  12 };
  13 extern const unsigned char tree_code_length[];
  14 struct tree_common
  15 {
  16   enum tree_code code:8;
  17 };
  18 union tree_node
  19 {
  20   struct tree_common common;
  21 };
  22 void
  23 blah (tree t)
  24 {
  25   if (t->common.code != COND_EXPR)
  26     abort ();
  27   if (1 >= tree_code_length[t->common.code])
  28     abort ();
  29
  30 }
  31
  32 /* { dg-final { scan-tree-dump-times "tree_code_length.42." 1 "vrp1" } } */
  33 /* { dg-final { cleanup-tree-dump "vrp1" } } */
  34