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/* PR tree-optimization/20657
VRP did not pick up a conditional equivalence from the first "if"
statement, which was needed to eliminate the second "if" statement. */
/* { dg-do compile } */
/* { dg-options "-O2 -fno-tree-dominator-opts -fdump-tree-vrp1-details" } */
int
foo (int a)
{
if (a == 0)
if (a == 0)
return 1;
return 0;
}
/* { dg-final { scan-tree-dump-times "Folding predicate" 1 "vrp1"} } */
/* { dg-final { cleanup-tree-dump "vrp1" } } */
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