1 /* { dg-do run } */
2 /* { dg-options "-O2 -fipa-pta -fno-tree-fre -fno-tree-sra -fdump-ipa-pta2-details -fdelete-null-pointer-checks" } */
3
4 struct X {
5 int i;
6 void *p;
7 };
8
9 static void * __attribute__((noinline,noclone))
foo(struct X * q,void * p)10 foo(struct X *q, void *p)
11 {
12 struct X b;
13 b.p = p;
14 *q = b;
15 return q->p;
16 }
17 extern void abort (void);
main()18 int main()
19 {
20 struct X a, c;
21 void *p;
22 a.p = (void *)&c;
23 p = foo(&a, &a);
24 /* { dg-final { scan-ipa-dump "foo.result = { NULL a\[^ \]* c\[^ \]* }" "pta2" { target { ! keeps_null_pointer_checks } } } } */
25 /* { dg-final { scan-ipa-dump "foo.result = { NONLOCAL a\[^ \]* c\[^ \]* }" "pta2" { target { keeps_null_pointer_checks } } } } */
26 ((struct X *)p)->p = (void *)0;
27 if (a.p != (void *)0)
28 abort ();
29 return 0;
30 }
31
32