/* { 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" } } */