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Enhance InsertPHITranslatedPointer to be able to return a list of newly

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inserted instructions.  No functionality change until someone starts using it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90039 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-11-28 15:39:14 +00:00
parent ab9530ee5d
commit dd696052f0
3 changed files with 19 additions and 13 deletions
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lib/Analysis/MemoryDependenceAnalysis.cpp
+13 -10
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@@ -879,14 +879,13 @@ GetAvailablePHITranslatedValue(Value *V,
/// InsertPHITranslatedPointer - Insert a computation of the PHI translated
/// version of 'V' for the edge PredBB->CurBB into the end of the PredBB
/// block.
/// block. All newly created instructions are added to the NewInsts list.
///
/// This is only called when PHITranslatePointer returns a value that doesn't
/// dominate the block, so we don't need to handle the trivial cases here.
Value *MemoryDependenceAnalysis::
InsertPHITranslatedPointer(Value *InVal, BasicBlock *CurBB,
BasicBlock *PredBB, const TargetData *TD,
const DominatorTree &DT) const {
const DominatorTree &DT,
SmallVectorImpl<Instruction*> &NewInsts) const {
// See if we have a version of this value already available and dominating
// PredBB. If so, there is no need to insert a new copy.
if (Value *Res = GetAvailablePHITranslatedValue(InVal, CurBB, PredBB, TD, DT))
@@ -899,13 +898,15 @@ InsertPHITranslatedPointer(Value *InVal, BasicBlock *CurBB,
// Handle bitcast of PHI translatable value.
if (BitCastInst *BC = dyn_cast<BitCastInst>(Inst)) {
Value *OpVal = InsertPHITranslatedPointer(BC->getOperand(0),
CurBB, PredBB, TD, DT);
CurBB, PredBB, TD, DT, NewInsts);
if (OpVal == 0) return 0;
// Otherwise insert a bitcast at the end of PredBB.
return new BitCastInst(OpVal, InVal->getType(),
InVal->getName()+".phi.trans.insert",
PredBB->getTerminator());
BitCastInst *New = new BitCastInst(OpVal, InVal->getType(),
InVal->getName()+".phi.trans.insert",
PredBB->getTerminator());
NewInsts.push_back(New);
return New;
}
// Handle getelementptr with at least one PHI operand.
@@ -914,7 +915,7 @@ InsertPHITranslatedPointer(Value *InVal, BasicBlock *CurBB,
BasicBlock *CurBB = GEP->getParent();
for (unsigned i = 0, e = GEP->getNumOperands(); i != e; ++i) {
Value *OpVal = InsertPHITranslatedPointer(GEP->getOperand(i),
CurBB, PredBB, TD, DT);
CurBB, PredBB, TD, DT, NewInsts);
if (OpVal == 0) return 0;
GEPOps.push_back(OpVal);
}
@@ -924,6 +925,7 @@ InsertPHITranslatedPointer(Value *InVal, BasicBlock *CurBB,
InVal->getName()+".phi.trans.insert",
PredBB->getTerminator());
Result->setIsInBounds(GEP->isInBounds());
NewInsts.push_back(Result);
return Result;
}
@@ -937,7 +939,7 @@ InsertPHITranslatedPointer(Value *InVal, BasicBlock *CurBB,
isa<ConstantInt>(Inst->getOperand(1))) {
// PHI translate the LHS.
Value *OpVal = InsertPHITranslatedPointer(Inst->getOperand(0),
CurBB, PredBB, TD, DT);
CurBB, PredBB, TD, DT, NewInsts);
if (OpVal == 0) return 0;
BinaryOperator *Res = BinaryOperator::CreateAdd(OpVal, Inst->getOperand(1),
@@ -945,6 +947,7 @@ InsertPHITranslatedPointer(Value *InVal, BasicBlock *CurBB,
PredBB->getTerminator());
Res->setHasNoSignedWrap(cast<BinaryOperator>(Inst)->hasNoSignedWrap());
Res->setHasNoUnsignedWrap(cast<BinaryOperator>(Inst)->hasNoUnsignedWrap());
NewInsts.push_back(Res);
return Res;
}
#endif