| /* <rdar://problem/7437022> */ |
| /* Just enough complexity to frighten the optimizer and expose a bug |
| in an ugly one-file testcase. */ |
| extern int printf(const char * __restrict, ...); |
| extern void abort(void); |
| typedef struct { |
| float ary[3]; |
| } foostruct; |
| typedef struct { |
| foostruct foo; |
| float safe; |
| } barstruct; |
| barstruct bar_ary[4]; |
| float * __attribute__ ((__noinline__)) |
| spooky(int i) { |
| bar_ary[i].safe = 142.0; |
| return &bar_ary[i].safe; |
| } |
| foostruct __attribute__ ((__noinline__)) |
| foobify(void) { |
| static barstruct my_static_foo = { {42.0, 42.0, 42.0}, /*safe=*/42.0 }; |
| return my_static_foo.foo; |
| } |
| int |
| main(int argc, char *argv[]) { |
| float *pf = spooky(0); |
| /* This should store exactly 96 bits. Some compilers stored 128 |
| bits, clobbering beyond the end of the "foo" struct. */ |
| bar_ary[0].foo = foobify(); |
| if (*pf != 142.0) { |
| printf("error: store clobbered memory outside destination\n"); |
| abort(); |
| } |
| return 0; |
| } |
