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Now that hasConstantValue is more careful w.r.t. returning values that only

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dominate the PHI node, this code can go away.  This also makes passes more
aggressive, e.g. implementing Transforms/CondProp/phisimplify2.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22670 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-05 01:02:04 +00:00
parent b3b48e11da
commit 1325b42a7d
1 changed files with 4 additions and 5 deletions
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9
lib/VMCore/BasicBlock.cpp
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@ -193,11 +193,10 @@ void BasicBlock::removePredecessor(BasicBlock *Pred,
PN->removeIncomingValue(Pred, false);
// If all incoming values to the Phi are the same, we can replace the Phi
// with that value.
if (Value *PNV = PN->hasConstantValue())
if (!isa<Instruction>(PNV)) {
PN->replaceAllUsesWith(PNV);
PN->eraseFromParent();
}
if (Value *PNV = PN->hasConstantValue()) {
PN->replaceAllUsesWith(PNV);
PN->eraseFromParent();
}
}
}
}