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fix a bug handling 'not x' when x is undef.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88864 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-11-15 19:57:43 +00:00
parent 5415127330
commit 1fb5630474
1 changed files with 3 additions and 2 deletions
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5
lib/Transforms/Scalar/JumpThreading.cpp
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@ -350,8 +350,9 @@ ComputeValueKnownInPredecessors(Value *V, BasicBlock *BB,PredValueInfo &Result){
// Invert the known values.
for (unsigned i = 0, e = Result.size(); i != e; ++i)
Result[i].first =
cast<ConstantInt>(ConstantExpr::getNot(Result[i].first));
if (Result[i].first)
Result[i].first =
cast<ConstantInt>(ConstantExpr::getNot(Result[i].first));
return true;
}
}