1 /* PR tree-optimization/93582 */
2 /* { dg-do compile { target lp64 } } */
3 /* { dg-options "-O2 -fdump-tree-fre1" } */
4 /* { dg-final { scan-tree-dump "return 9223372036854775806;" "fre1" } } */
5
6 union U { struct A { unsigned long long a : 1, b : 62, c : 1; } a; unsigned long long i; };
7
8 unsigned long long
foo(char * p)9 foo (char *p)
10 {
11 __builtin_memset (p - 0xfffffffffffffffULL, 0, 0xffffffffffffffeULL);
12 __builtin_memset (p + 1, 0, 0xffffffffffffffeULL);
13 union U *q = (union U *) (void *) (p - 4);
14 q->a.b = -1;
15 return q->i;
16 }
17