| /* { dg-do run } |
| * { dg-options "-std=gnu23 -O2" } |
| */ |
| |
| /* This test checks that an incompatible definition of |
| * a tagged type without tag can be assumed not to alias. |
| * and that this is exploited during optimization. */ |
| |
| |
| // not sure this is wise, but this was already like this before |
| |
| typedef struct { int x; } foo_t; |
| |
| [[gnu::noinline,gnu::noipa]] |
| int test_foo(foo_t* a, void* b) |
| { |
| a->x = 1; |
| |
| struct { int x; }* p = b; |
| p->x = 2; |
| |
| return a->x; |
| } |
| |
| |
| int main() |
| { |
| foo_t y; |
| |
| if (1 != test_foo(&y, &y)) |
| __builtin_abort(); |
| |
| return 0; |
| } |
| |
| |
