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Make better use of the PHINode API.

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Change various bits of code to make better use of the existing PHINode
API, to insulate them from forthcoming changes in how PHINodes store
their operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133434 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jay Foad
2011-06-20 14:18:48 +00:00
parent 691c05bb29
commit c137120bb0
7 changed files with 34 additions and 21 deletions
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4
lib/VMCore/BasicBlock.cpp
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@@ -227,8 +227,8 @@ void BasicBlock::removePredecessor(BasicBlock *Pred,
// If the PHI _HAD_ two uses, replace PHI node with its now *single* value
if (max_idx == 2) {
if (PN->getOperand(0) != PN)
PN->replaceAllUsesWith(PN->getOperand(0));
if (PN->getIncomingValue(0) != PN)
PN->replaceAllUsesWith(PN->getIncomingValue(0));
else
// We are left with an infinite loop with no entries: kill the PHI.
PN->replaceAllUsesWith(UndefValue::get(PN->getType()));