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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [gcc/] [testsuite/] [gcc.dg/] [tree-ssa/] [pr21001.c] - Blame information for rev 12

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Line No. Rev Author Line
1 12 jlechner
/* PR tree-optimization/21001
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   VRP did not insert ASSERT_EXPRs when the variable tested in a
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   COND_EXPR is a single-use variable.  By propagating the definition
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   of the single-use variable into the COND_EXPR, we can get useful
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   range infomation out of the conditional.  */
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/* { dg-do compile } */
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/* { dg-options "-O2 -fno-tree-dominator-opts -fdump-tree-vrp-details" } */
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int
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foo (int a)
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{
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  int b = a != 0;
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  if (b)
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    if (a != 0)
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      return 1;
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  return 0;
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}
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/* { dg-final { scan-tree-dump-times "Folding predicate" 1 "vrp"} } */
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/* { dg-final { cleanup-tree-dump "vrp" } } */

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