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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 *r = 0;
if (p)
{
if (p == q)
{
/* This should be folded to 'if (1)' because q is [p, p]
and p is ~[0, 0]. */
if (q)
r = &q->a;
/* This should be folded to 'if (1)' because q should be
~[0, 0] and thus &q->a should be ~[0, 0]. */
if (r)
return 5;
}
}
return q->a;
}
/* { dg-final { scan-tree-dump-times "Folding predicate q_.*to 1" 1 "vrp1" } } */
/* { dg-final { scan-tree-dump-times "Folding predicate r_.*to 1" 1 "vrp1" } } */
/* { dg-final { cleanup-tree-dump "vrp1" } } */
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