| /* { dg-do run } */ |
| /* { dg-options "-O2 -fipa-pta -fno-tree-fre -fno-tree-sra -fdump-ipa-pta2-details -fdelete-null-pointer-checks" } */ |
| |
| struct X { |
| int i; |
| void *p; |
| }; |
| |
| static void * __attribute__((noinline,noclone)) |
| foo(struct X *q, void *p) |
| { |
| struct X b; |
| b.p = p; |
| *q = b; |
| return q->p; |
| } |
| extern void abort (void); |
| int main() |
| { |
| struct X a, c; |
| void *p; |
| a.p = (void *)&c; |
| p = foo(&a, &a); |
| /* { dg-final { scan-ipa-dump "foo.result = { NULL a\[^ \]* c\[^ \]* }" "pta2" { target { ! keeps_null_pointer_checks } } } } */ |
| /* { dg-final { scan-ipa-dump "foo.result = { NONLOCAL a\[^ \]* c\[^ \]* }" "pta2" { target { keeps_null_pointer_checks } } } } */ |
| ((struct X *)p)->p = (void *)0; |
| if (a.p != (void *)0) |
| abort (); |
| return 0; |
| } |
| |