36 lines
678 B
C
36 lines
678 B
C
/* { dg-do compile } */
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/* { dg-options "-O2 -fdump-tree-vrp1" } */
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struct A
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{
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int a;
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int b;
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};
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foo (struct A *p, struct A *q)
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{
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int *r = 0;
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if (p)
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{
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if (p == q)
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{
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/* This should be folded to 'if (1)' because q is [p, p]
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and p is ~[0, 0]. */
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if (q)
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r = &q->a;
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/* This should be folded to 'if (1)' because q should be
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~[0, 0] and thus &q->a should be ~[0, 0]. */
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if (r)
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return 5;
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}
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}
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return q->a;
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}
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/* { dg-final { scan-tree-dump-times "Folding predicate q_.*to 1" 1 "vrp1" } } */
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/* { dg-final { scan-tree-dump-times "Folding predicate r_.*to 1" 1 "vrp1" } } */
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/* { dg-final { cleanup-tree-dump "vrp1" } } */
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