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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-vrp1" } */
struct A
{
int a;
int b;
};
foo (struct A *p, struct A *q)
{
int x = p->a;
if (p == q)
return q->a;
/* We should fold this to 'if (1)' but the assertion for 'p == q'
was overwriting the assertion 'p != 0' from the first dereference
of 'p'. */
if (p)
return x + p->b;
}
/* Target with fno-delete-null-pointer-checks should not fold check */
/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 1 "vrp1" { target { ! keeps_null_pointer_checks } } } } */
/* { dg-final { scan-tree-dump-times "Folding predicate p_.*to 1" 0 "vrp1" { target { keeps_null_pointer_checks } } } } */
/* { dg-final { cleanup-tree-dump "vrp1" } } */
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