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add ability for clients of SSAUpdater to find out about the

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PHI nodes inserted.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83744 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-10-10 23:15:24 +00:00
parent aa6aeb91b4
commit f5a1fb6b24
2 changed files with 19 additions and 2 deletions
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11
include/llvm/Transforms/Utils/SSAUpdater.h
View File

@ -18,6 +18,9 @@ namespace llvm {
class Value;
class BasicBlock;
class Use;
class PHINode;
template<typename T>
class SmallVectorImpl;
/// SSAUpdater - This class updates SSA form for a set of values defined in
/// multiple blocks. This is used when code duplication or another unstructured
@ -40,8 +43,14 @@ class SSAUpdater {
/// should be empty.
//std::vector<std::pair<BasicBlock*, TrackingVH<Value> > > IncomingPredInfo;
void *IPI;
/// InsertedPHIs - If this is non-null, the SSAUpdater adds all PHI nodes that
/// it creates to the vector.
SmallVectorImpl<PHINode*> *InsertedPHIs;
public:
SSAUpdater();
/// SSAUpdater constructor. If InsertedPHIs is specified, it will be filled
/// in with all PHI Nodes created by rewriting.
SSAUpdater(SmallVectorImpl<PHINode*> *InsertedPHIs = 0);
~SSAUpdater();
/// Initialize - Reset this object to get ready for a new set of SSA

10
lib/Transforms/Utils/SSAUpdater.cpp
View File

@ -33,7 +33,8 @@ static IncomingPredInfoTy &getIncomingPredInfo(void *IPI) {
}
SSAUpdater::SSAUpdater() : AV(0), PrototypeValue(0), IPI(0) {}
SSAUpdater::SSAUpdater(SmallVectorImpl<PHINode*> *NewPHI)
: AV(0), PrototypeValue(0), IPI(0), InsertedPHIs(NewPHI) {}
SSAUpdater::~SSAUpdater() {
delete &getAvailableVals(AV);
@ -158,6 +159,10 @@ Value *SSAUpdater::GetValueInMiddleOfBlock(BasicBlock *BB) {
InsertedPHI->eraseFromParent();
return ConstVal;
}
// If the client wants to know about all new instructions, tell it.
if (InsertedPHIs) InsertedPHIs->push_back(InsertedPHI);
DEBUG(errs() << " Inserted PHI: " << *InsertedPHI << "\n");
return InsertedPHI;
}
@ -313,6 +318,9 @@ Value *SSAUpdater::GetValueAtEndOfBlockInternal(BasicBlock *BB) {
InsertedVal = ConstVal;
} else {
DEBUG(errs() << " Inserted PHI: " << *InsertedPHI << "\n");
// If the client wants to know about all new instructions, tell it.
if (InsertedPHIs) InsertedPHIs->push_back(InsertedPHI);
}
return InsertedVal;