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/* PR tree-optimization/21658
CCP did not propagate an ADDR_EXPR far enough, preventing the "if"
statement below from being folded. */
/* { dg-do compile } */
/* { dg-options "-O2 -fno-tree-dominator-opts -fdump-tree-ccp1-details" } */
void link_error (void);
void
f (void)
{
int a[10];
int *p = &a[5];
int *q = p - 1;
if (q != &a[4])
link_error ();
}
/* { dg-final { scan-tree-dump-times "Folded into: if " 1 "ccp1"} } */
/* { dg-final { cleanup-tree-dump "ccp1" } } */
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