?? vrp04.c
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/* { dg-do compile } *//* { dg-options "-O2 -fdump-tree-vrp" } */foo (int a, int b){ if (a == b) /* This should be folded to if (1) */ if (a == b) return a + b;}/* { dg-final { scan-tree-dump-times "Folding predicate a_.*to 1" 1 "vrp" } } *//* { dg-final { cleanup-tree-dump "vrp" } } */?? 快捷鍵說明
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