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Don't keep track of inserted phis in PromoteMemoryToRegister: the information

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is never used.  Patch by Cameron Zwarich.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119963 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2010-11-22 09:41:24 +00:00
parent 3d93893895
commit b05099bf42
1 changed files with 3 additions and 8 deletions
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11
lib/Transforms/Utils/PromoteMemoryToRegister.cpp
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@ -265,8 +265,7 @@ namespace {
void RenamePass(BasicBlock *BB, BasicBlock *Pred,
RenamePassData::ValVector &IncVals,
std::vector<RenamePassData> &Worklist);
bool QueuePhiNode(BasicBlock *BB, unsigned AllocaIdx, unsigned &Version,
SmallPtrSet<PHINode*, 16> &InsertedPHINodes);
bool QueuePhiNode(BasicBlock *BB, unsigned AllocaIdx, unsigned &Version);
};
struct AllocaInfo {
@ -677,7 +676,6 @@ void PromoteMem2Reg::DetermineInsertionPoint(AllocaInst *AI, unsigned AllocaNum,
// Compute the locations where PhiNodes need to be inserted. Look at the
// dominance frontier of EACH basic-block we have a write in.
unsigned CurrentVersion = 0;
SmallPtrSet<PHINode*, 16> InsertedPHINodes;
std::vector<std::pair<unsigned, BasicBlock*> > DFBlocks;
while (!Info.DefiningBlocks.empty()) {
BasicBlock *BB = Info.DefiningBlocks.back();
@ -710,7 +708,7 @@ void PromoteMem2Reg::DetermineInsertionPoint(AllocaInst *AI, unsigned AllocaNum,
for (unsigned i = 0, e = DFBlocks.size(); i != e; ++i) {
BasicBlock *BB = DFBlocks[i].second;
if (QueuePhiNode(BB, AllocaNum, CurrentVersion, InsertedPHINodes))
if (QueuePhiNode(BB, AllocaNum, CurrentVersion))
Info.DefiningBlocks.push_back(BB);
}
DFBlocks.clear();
@ -901,8 +899,7 @@ void PromoteMem2Reg::ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
// Alloca returns true if there wasn't already a phi-node for that variable
//
bool PromoteMem2Reg::QueuePhiNode(BasicBlock *BB, unsigned AllocaNo,
unsigned &Version,
SmallPtrSet<PHINode*, 16> &InsertedPHINodes) {
unsigned &Version) {
// Look up the basic-block in question.
PHINode *&PN = NewPhiNodes[std::make_pair(BB, AllocaNo)];
@ -917,8 +914,6 @@ bool PromoteMem2Reg::QueuePhiNode(BasicBlock *BB, unsigned AllocaNo,
++NumPHIInsert;
PhiToAllocaMap[PN] = AllocaNo;
PN->reserveOperandSpace(getNumPreds(BB));
InsertedPHINodes.insert(PN);
if (AST && PN->getType()->isPointerTy())
AST->copyValue(PointerAllocaValues[AllocaNo], PN);