gcc/testsuite/gcc.dg/c23-tag-alias-3.c

   1 /* { dg-do run { target lto } }
   2  * { dg-options "-std=c23 -O2" }
   3  */
   4
   5 /* These tests check that definitions of enums with
   6  * the same underlying type can alias, even when
   7  * they are not compatible.  */
   8
   9 enum bar : long { A = 1, B = 3 };
  10
  11 int test_bar(enum bar* a, void* b)
  12 {
  13         *a = A;
  14
  15         enum foo : long { C = 2, D = 4 }* p = b;
  16         *p = B;
  17
  18         return *a;
  19 }
  20
  21
  22 int main()
  23 {
  24         enum bar z;
  25
  26         if (B != test_bar(&z, &z))
  27                 __builtin_abort();
  28
  29         return 0;
  30 }
  31
  32