| /* When -fstrict-flex-arrays=1, [], [0], and [1] are treated as flexible |
| arrays. */ |
| /* PR tree-optimization/101836 */ |
| /* { dg-do run } */ |
| /* { dg-options "-O2 -fstrict-flex-arrays=1" } */ |
| |
| #include <stdio.h> |
| |
| #define expect(p, _v) do { \ |
| size_t v = _v; \ |
| if (p == v) \ |
| printf("ok: %s == %zd\n", #p, p); \ |
| else \ |
| { \ |
| printf("WAT: %s == %zd (expected %zd)\n", #p, p, v); \ |
| __builtin_abort (); \ |
| } \ |
| } while (0); |
| |
| struct trailing_array_1 { |
| int a; |
| int b; |
| int c[4]; |
| }; |
| |
| struct trailing_array_2 { |
| int a; |
| int b; |
| int c[1]; |
| }; |
| |
| struct trailing_array_3 { |
| int a; |
| int b; |
| int c[0]; |
| }; |
| struct trailing_array_4 { |
| int a; |
| int b; |
| int c[]; |
| }; |
| |
| void __attribute__((__noinline__)) stuff( |
| struct trailing_array_1 *normal, |
| struct trailing_array_2 *trailing_1, |
| struct trailing_array_3 *trailing_0, |
| struct trailing_array_4 *trailing_flex) |
| { |
| expect(__builtin_object_size(normal->c, 1), 16); |
| expect(__builtin_object_size(trailing_1->c, 1), -1); |
| expect(__builtin_object_size(trailing_0->c, 1), -1); |
| expect(__builtin_object_size(trailing_flex->c, 1), -1); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| stuff((void *)argv[0], (void *)argv[0], (void *)argv[0], (void *)argv[0]); |
| |
| return 0; |
| } |