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Fix bug: test/Regression/Transforms/ADCE/2002-05-23-ZeroArgPHITest.ll
Which contains a description of why this is neccesary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2733 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -8,6 +8,7 @@
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#include "llvm/iTerminators.h"
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#include "llvm/Type.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Constant.h"
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#include "llvm/iPHINode.h"
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#include "llvm/CodeGen/MachineInstr.h"
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@ -131,7 +132,9 @@ void BasicBlock::removePredecessor(BasicBlock *Pred) {
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// If the PHI _HAD_ two uses, replace PHI node with its now *single* value
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if (max_idx == 2)
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PN->replaceAllUsesWith(PN->getOperand(0));
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delete getInstList().remove(begin()); // Remove the PHI node
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else // Otherwise there are no incoming values/edges, replace with dummy
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PN->replaceAllUsesWith(Constant::getNullValue(PN->getType()));
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delete getInstList().remove(begin()); // Remove the PHI node
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}
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} else {
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// Okay, now we know that we need to remove predecessor #pred_idx from all
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