#include "llvm/Support/ValueHandle.h"
using namespace llvm;
-//===----------------------------------------------------------------------===//
-// MetadataBase implementation.
-//
-
//===----------------------------------------------------------------------===//
// MDString implementation.
//
+
+MDString::MDString(LLVMContext &C, StringRef S)
+ : MetadataBase(Type::getMetadataTy(C), Value::MDStringVal), Str(S) {}
+
MDString *MDString::get(LLVMContext &Context, StringRef Str) {
LLVMContextImpl *pImpl = Context.pImpl;
StringMapEntry<MDString *> &Entry =
MDNodeElement(Value *V, MDNode *P) : CallbackVH(V), Parent(P) {}
~MDNodeElement() {}
+ void set(Value *V, MDNode *P) {
+ setValPtr(V);
+ Parent = P;
+ }
+
virtual void deleted();
virtual void allUsesReplacedWith(Value *NV);
};
void MDNodeElement::deleted() {
- Parent->replaceElement(this->operator Value*(), 0);
+ Parent->replaceElement(this, 0);
}
void MDNodeElement::allUsesReplacedWith(Value *NV) {
- Parent->replaceElement(this->operator Value*(), NV);
+ Parent->replaceElement(this, NV);
}
// MDNode implementation.
//
+/// ~MDNode - Destroy MDNode.
+MDNode::~MDNode() {
+ LLVMContextImpl *pImpl = getType()->getContext().pImpl;
+ pImpl->MDNodeSet.RemoveNode(this);
+ delete [] Operands;
+ Operands = NULL;
+}
+
MDNode::MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals,
bool isFunctionLocal)
: MetadataBase(Type::getMetadataTy(C), Value::MDNodeVal) {
- NodeSize = NumVals;
- Node = new MDNodeElement[NodeSize];
- MDNodeElement *Ptr = Node;
+ NumOperands = NumVals;
+ Operands = new MDNodeElement[NumOperands];
+
for (unsigned i = 0; i != NumVals; ++i)
- *Ptr++ = MDNodeElement(Vals[i], this);
+ Operands[i].set(Vals[i], this);
+
if (isFunctionLocal)
- SubclassData |= FunctionLocalBit;
-}
-
-void MDNode::Profile(FoldingSetNodeID &ID) const {
- for (unsigned i = 0, e = getNumElements(); i != e; ++i)
- ID.AddPointer(getElement(i));
+ setValueSubclassData(getSubclassDataFromValue() | FunctionLocalBit);
}
MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals,
return N;
}
-/// ~MDNode - Destroy MDNode.
-MDNode::~MDNode() {
- LLVMContextImpl *pImpl = getType()->getContext().pImpl;
- pImpl->MDNodeSet.RemoveNode(this);
- delete [] Node;
- Node = NULL;
+void MDNode::Profile(FoldingSetNodeID &ID) const {
+ for (unsigned i = 0, e = getNumElements(); i != e; ++i)
+ ID.AddPointer(getElement(i));
+ // HASH TABLE COLLISIONS?
+ // DO NOT REINSERT AFTER AN OPERAND DROPS TO NULL!
}
+
/// getElement - Return specified element.
Value *MDNode::getElement(unsigned i) const {
assert(i < getNumElements() && "Invalid element number!");
- return Node[i];
+ return Operands[i];
}
// Replace value from this node's element list.
-void MDNode::replaceElement(Value *From, Value *To) {
- if (From == To || !getType())
+void MDNode::replaceElement(MDNodeElement *Op, Value *To) {
+ Value *From = *Op;
+
+ if (From == To)
return;
- LLVMContext &Context = getType()->getContext();
- LLVMContextImpl *pImpl = Context.pImpl;
-
- // Find value. This is a linear search, do something if it consumes
- // lot of time. It is possible that to have multiple instances of
- // From in this MDNode's element list.
- SmallVector<unsigned, 4> Indexes;
- unsigned Index = 0;
- for (unsigned i = 0, e = getNumElements(); i != e; ++i, ++Index) {
- Value *V = getElement(i);
- if (V && V == From)
- Indexes.push_back(Index);
- }
- if (Indexes.empty())
- return;
+ LLVMContextImpl *pImpl = getType()->getContext().pImpl;
- // Remove "this" from the context map.
+ // Remove "this" from the context map. FoldingSet doesn't have to reprofile
+ // this node to remove it, so we don't care what state the operands are in.
pImpl->MDNodeSet.RemoveNode(this);
- // Replace From element(s) in place.
- for (SmallVector<unsigned, 4>::iterator I = Indexes.begin(), E = Indexes.end();
- I != E; ++I) {
- unsigned Index = *I;
- Node[Index] = MDNodeElement(To, this);
- }
+ // Update the operand.
+ Op->set(To, this);
// Insert updated "this" into the context's folding node set.
// If a node with same element list already exist then before inserting
if (N) {
N->replaceAllUsesWith(this);
delete N;
- N = 0;
+ N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
+ assert(N == 0 && "shouldn't be in the map now!"); (void)N;
}
- N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
- if (!N) {
- // InsertPoint will have been set by the FindNodeOrInsertPos call.
- N = this;
- pImpl->MDNodeSet.InsertNode(N, InsertPoint);
- }
-}
-
-// getLocalFunction - Return false if MDNode's recursive function-localness is
-// invalid (local to more than one function). Return true otherwise. If MDNode
-// has one function to which it is local, set LocalFunction to that function.
-bool MDNode::getLocalFunction(Function *LocalFunction,
- SmallPtrSet<MDNode *, 32> *VisitedMDNodes) {
- if (!isFunctionLocal())
- return true;
-
- if (!VisitedMDNodes)
- VisitedMDNodes = new SmallPtrSet<MDNode *, 32>();
-
- if (!VisitedMDNodes->insert(this))
- // MDNode has already been visited, nothing to do.
- return true;
-
- for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
- Value *V = getElement(i);
- if (!V) continue;
-
- Function *LocalFunctionTemp = NULL;
- if (Instruction *I = dyn_cast<Instruction>(V))
- LocalFunctionTemp = I->getParent()->getParent();
- else if (MDNode *MD = dyn_cast<MDNode>(V))
- if (!MD->getLocalFunction(LocalFunctionTemp, VisitedMDNodes))
- // This MDNode's operand is function-locally invalid or local to a
- // different function.
- return false;
-
- if (LocalFunctionTemp) {
- if (!LocalFunction)
- LocalFunction = LocalFunctionTemp;
- else if (LocalFunction != LocalFunctionTemp)
- // This MDNode contains operands that are local to different functions.
- return false;
- }
- }
-
- return true;
+ // InsertPoint will have been set by the FindNodeOrInsertPos call.
+ pImpl->MDNodeSet.InsertNode(this, InsertPoint);
}
//===----------------------------------------------------------------------===//
StringMap<unsigned> MDHandlerNames;
public:
- /// registerMDKind - Register a new metadata kind and return its ID.
- /// A metadata kind can be registered only once.
- unsigned registerMDKind(StringRef Name);
-
- /// getMDKind - Return metadata kind. If the requested metadata kind
- /// is not registered then return 0.
- unsigned getMDKind(StringRef Name) const;
-
- /// getMD - Get the metadata of given kind attached to an Instruction.
- /// If the metadata is not found then return 0.
- MDNode *getMD(unsigned Kind, const Instruction *Inst);
-
- /// getMDs - Get the metadata attached to an Instruction.
- void getMDs(const Instruction *Inst,
- SmallVectorImpl<std::pair<unsigned, MDNode*> > &MDs) const;
-
- /// addMD - Attach the metadata of given kind to an Instruction.
- void addMD(unsigned Kind, MDNode *Node, Instruction *Inst);
+ // Name <-> ID mapping methods.
+ unsigned getMDKindID(StringRef Name);
+ void getMDKindNames(SmallVectorImpl<StringRef> &) const;
- /// removeMD - Remove metadata of given kind attached with an instruction.
- void removeMD(unsigned Kind, Instruction *Inst);
- /// removeAllMetadata - Remove all metadata attached with an instruction.
- void removeAllMetadata(Instruction *Inst);
+ // Instruction metadata methods.
+ MDNode *getMetadata(const Instruction *Inst, unsigned Kind);
+ void getAllMetadata(const Instruction *Inst,
+ SmallVectorImpl<std::pair<unsigned, MDNode*> > &MDs)const;
+
+ void setMetadata(Instruction *Inst, unsigned Kind, MDNode *Node);
+ /// removeAllMetadata - Remove all metadata attached to an instruction.
+ void removeAllMetadata(Instruction *Inst);
+
/// copyMD - If metadata is attached with Instruction In1 then attach
/// the same metadata to In2.
void copyMD(Instruction *In1, Instruction *In2);
-
- /// getHandlerNames - Populate client-supplied smallvector using custom
- /// metadata name and ID.
- void getHandlerNames(SmallVectorImpl<std::pair<unsigned, StringRef> >&) const;
-
- /// ValueIsDeleted - This handler is used to update metadata store
- /// when a value is deleted.
- void ValueIsDeleted(const Value *) {}
- void ValueIsDeleted(Instruction *Inst) {
- removeAllMetadata(Inst);
- }
- void ValueIsRAUWd(Value *V1, Value *V2);
-
- /// ValueIsCloned - This handler is used to update metadata store
- /// when In1 is cloned to create In2.
- void ValueIsCloned(const Instruction *In1, Instruction *In2);
};
}
-/// registerMDKind - Register a new metadata kind and return its ID.
-/// A metadata kind can be registered only once.
-unsigned MetadataContextImpl::registerMDKind(StringRef Name) {
- unsigned Count = MDHandlerNames.size();
- assert(MDHandlerNames.count(Name) == 0 && "Already registered MDKind!");
- return MDHandlerNames[Name] = Count + 1;
-}
+/// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
+unsigned MetadataContextImpl::getMDKindID(StringRef Name) {
+ unsigned &Entry = MDHandlerNames[Name];
-/// getMDKind - Return metadata kind. If the requested metadata kind
-/// is not registered then return 0.
-unsigned MetadataContextImpl::getMDKind(StringRef Name) const {
- StringMap<unsigned>::const_iterator I = MDHandlerNames.find(Name);
- if (I == MDHandlerNames.end())
- return 0;
+ // If this is new, assign it its ID.
+ if (Entry == 0) Entry = MDHandlerNames.size();
+ return Entry;
+}
- return I->getValue();
+/// getHandlerNames - Populate client supplied smallvector using custome
+/// metadata name and ID.
+void MetadataContextImpl::
+getMDKindNames(SmallVectorImpl<StringRef> &Names) const {
+ Names.resize(MDHandlerNames.size()+1);
+ Names[0] = "";
+ for (StringMap<unsigned>::const_iterator I = MDHandlerNames.begin(),
+ E = MDHandlerNames.end(); I != E; ++I)
+ // MD Handlers are numbered from 1.
+ Names[I->second] = I->first();
}
-/// addMD - Attach the metadata of given kind to an Instruction.
-void MetadataContextImpl::addMD(unsigned MDKind, MDNode *Node,
- Instruction *Inst) {
- assert(Node && "Invalid null MDNode");
- Inst->HasMetadata = true;
+
+/// getMetadata - Get the metadata of given kind attached to an Instruction.
+/// If the metadata is not found then return 0.
+MDNode *MetadataContextImpl::
+getMetadata(const Instruction *Inst, unsigned MDKind) {
MDMapTy &Info = MetadataStore[Inst];
- if (Info.empty()) {
- Info.push_back(std::make_pair(MDKind, Node));
- MetadataStore.insert(std::make_pair(Inst, Info));
- return;
- }
+ assert(Inst->hasMetadata() && !Info.empty() && "Shouldn't have called this");
+
+ for (MDMapTy::iterator I = Info.begin(), E = Info.end(); I != E; ++I)
+ if (I->first == MDKind)
+ return I->second;
+ return 0;
+}
- // If there is an entry for this MDKind then replace it.
- for (unsigned i = 0, e = Info.size(); i != e; ++i) {
- MDPairTy &P = Info[i];
- if (P.first == MDKind) {
- Info[i] = std::make_pair(MDKind, Node);
- return;
+/// getAllMetadata - Get all of the metadata attached to an Instruction.
+void MetadataContextImpl::
+getAllMetadata(const Instruction *Inst,
+ SmallVectorImpl<std::pair<unsigned, MDNode*> > &Result) const {
+ assert(Inst->hasMetadata() && MetadataStore.find(Inst) != MetadataStore.end()
+ && "Shouldn't have called this");
+ const MDMapTy &Info = MetadataStore.find(Inst)->second;
+ assert(!Info.empty() && "Shouldn't have called this");
+
+ Result.clear();
+ Result.append(Info.begin(), Info.end());
+
+ // Sort the resulting array so it is stable.
+ if (Result.size() > 1)
+ array_pod_sort(Result.begin(), Result.end());
+}
+
+
+void MetadataContextImpl::setMetadata(Instruction *Inst, unsigned Kind,
+ MDNode *Node) {
+ // Handle the case when we're adding/updating metadata on an instruction.
+ if (Node) {
+ MDMapTy &Info = MetadataStore[Inst];
+ assert(!Info.empty() == Inst->hasMetadata() && "HasMetadata bit is wonked");
+ if (Info.empty()) {
+ Inst->setHasMetadata(true);
+ } else {
+ // Handle replacement of an existing value.
+ for (unsigned i = 0, e = Info.size(); i != e; ++i)
+ if (Info[i].first == Kind) {
+ Info[i].second = Node;
+ return;
+ }
}
+
+ // No replacement, just add it to the list.
+ Info.push_back(std::make_pair(Kind, Node));
+ return;
}
+
+ // Otherwise, we're removing metadata from an instruction.
+ assert(Inst->hasMetadata() && MetadataStore.count(Inst) &&
+ "HasMetadata bit out of date!");
+ MDMapTy &Info = MetadataStore[Inst];
- // Otherwise add a new entry.
- Info.push_back(std::make_pair(MDKind, Node));
-}
-
-/// removeMD - Remove metadata of given kind attached with an instruction.
-void MetadataContextImpl::removeMD(unsigned Kind, Instruction *Inst) {
- MDStoreTy::iterator I = MetadataStore.find(Inst);
- if (I == MetadataStore.end())
+ // Common case is removing the only entry.
+ if (Info.size() == 1 && Info[0].first == Kind) {
+ MetadataStore.erase(Inst);
+ Inst->setHasMetadata(false);
return;
-
- MDMapTy &Info = I->second;
- for (MDMapTy::iterator MI = Info.begin(), ME = Info.end(); MI != ME; ++MI) {
- MDPairTy &P = *MI;
- if (P.first == Kind) {
- Info.erase(MI);
+ }
+
+ // Handle replacement of an existing value.
+ for (unsigned i = 0, e = Info.size(); i != e; ++i)
+ if (Info[i].first == Kind) {
+ Info[i] = Info.back();
+ Info.pop_back();
+ assert(!Info.empty() && "Removing last entry should be handled above");
return;
}
- }
+ // Otherwise, removing an entry that doesn't exist on the instruction.
}
/// removeAllMetadata - Remove all metadata attached with an instruction.
void MetadataContextImpl::removeAllMetadata(Instruction *Inst) {
MetadataStore.erase(Inst);
- Inst->HasMetadata = false;
+ Inst->setHasMetadata(false);
}
+
/// copyMD - If metadata is attached with Instruction In1 then attach
/// the same metadata to In2.
void MetadataContextImpl::copyMD(Instruction *In1, Instruction *In2) {
MDMapTy &In1Info = MetadataStore[In1];
if (In1Info.empty())
return;
-
- for (MDMapTy::iterator I = In1Info.begin(), E = In1Info.end(); I != E; ++I)
- addMD(I->first, I->second, In2);
-}
-
-/// getMD - Get the metadata of given kind attached to an Instruction.
-/// If the metadata is not found then return 0.
-MDNode *MetadataContextImpl::getMD(unsigned MDKind, const Instruction *Inst) {
- MDMapTy &Info = MetadataStore[Inst];
- if (Info.empty())
- return NULL;
-
- for (MDMapTy::iterator I = Info.begin(), E = Info.end(); I != E; ++I)
- if (I->first == MDKind)
- return I->second;
- return NULL;
-}
-
-/// getMDs - Get the metadata attached to an Instruction.
-void MetadataContextImpl::
-getMDs(const Instruction *Inst,
- SmallVectorImpl<std::pair<unsigned, MDNode*> > &MDs) const {
- MDStoreTy::const_iterator I = MetadataStore.find(Inst);
- if (I == MetadataStore.end())
- return;
- MDs.resize(I->second.size());
- for (MDMapTy::const_iterator MI = I->second.begin(), ME = I->second.end();
- MI != ME; ++MI)
- // MD kinds are numbered from 1.
- MDs[MI->first - 1] = std::make_pair(MI->first, MI->second);
-}
-
-/// getHandlerNames - Populate client supplied smallvector using custome
-/// metadata name and ID.
-void MetadataContextImpl::
-getHandlerNames(SmallVectorImpl<std::pair<unsigned, StringRef> >&Names) const {
- Names.resize(MDHandlerNames.size());
- for (StringMap<unsigned>::const_iterator I = MDHandlerNames.begin(),
- E = MDHandlerNames.end(); I != E; ++I)
- // MD Handlers are numbered from 1.
- Names[I->second - 1] = std::make_pair(I->second, I->first());
-}
-
-/// ValueIsCloned - This handler is used to update metadata store
-/// when In1 is cloned to create In2.
-void MetadataContextImpl::ValueIsCloned(const Instruction *In1,
- Instruction *In2) {
- // Find Metadata handles for In1.
- MDStoreTy::iterator I = MetadataStore.find(In1);
- assert(I != MetadataStore.end() && "Invalid custom metadata info!");
-
- // FIXME : Give all metadata handlers a chance to adjust.
-
- MDMapTy &In1Info = I->second;
- MDMapTy In2Info;
+
for (MDMapTy::iterator I = In1Info.begin(), E = In1Info.end(); I != E; ++I)
- addMD(I->first, I->second, In2);
-}
-
-/// ValueIsRAUWd - This handler is used when V1's all uses are replaced by
-/// V2.
-void MetadataContextImpl::ValueIsRAUWd(Value *V1, Value *V2) {
- Instruction *I1 = dyn_cast<Instruction>(V1);
- Instruction *I2 = dyn_cast<Instruction>(V2);
- if (!I1 || !I2)
- return;
-
- // FIXME : Give custom handlers a chance to override this.
- ValueIsCloned(I1, I2);
+ In2->setMetadata(I->first, I->second);
}
//===----------------------------------------------------------------------===//
// MetadataContext implementation.
//
-MetadataContext::MetadataContext()
- : pImpl(new MetadataContextImpl()) { }
+MetadataContext::MetadataContext() : pImpl(new MetadataContextImpl()) { }
MetadataContext::~MetadataContext() { delete pImpl; }
/// isValidName - Return true if Name is a valid custom metadata handler name.
return true;
}
-/// registerMDKind - Register a new metadata kind and return its ID.
-/// A metadata kind can be registered only once.
-unsigned MetadataContext::registerMDKind(StringRef Name) {
- assert(isValidName(Name) && "Invalid custome metadata name!");
- return pImpl->registerMDKind(Name);
+/// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
+unsigned MetadataContext::getMDKindID(StringRef Name) const {
+ return pImpl->getMDKindID(Name);
}
-/// getMDKind - Return metadata kind. If the requested metadata kind
-/// is not registered then return 0.
-unsigned MetadataContext::getMDKind(StringRef Name) const {
- return pImpl->getMDKind(Name);
+/// copyMD - If metadata is attached with Instruction In1 then attach
+/// the same metadata to In2.
+void MetadataContext::copyMD(Instruction *In1, Instruction *In2) {
+ pImpl->copyMD(In1, In2);
}
-/// getMD - Get the metadata of given kind attached to an Instruction.
-/// If the metadata is not found then return 0.
-MDNode *MetadataContext::getMD(unsigned Kind, const Instruction *Inst) {
- return pImpl->getMD(Kind, Inst);
+/// getHandlerNames - Populate client supplied smallvector using custome
+/// metadata name and ID.
+void MetadataContext::getMDKindNames(SmallVectorImpl<StringRef> &N) const {
+ pImpl->getMDKindNames(N);
}
-/// getMDs - Get the metadata attached to an Instruction.
-void MetadataContext::
-getMDs(const Instruction *Inst,
- SmallVectorImpl<std::pair<unsigned, MDNode*> > &MDs) const {
- return pImpl->getMDs(Inst, MDs);
-}
+//===----------------------------------------------------------------------===//
+// Instruction Metadata method implementations.
+//
-/// addMD - Attach the metadata of given kind to an Instruction.
-void MetadataContext::addMD(unsigned Kind, MDNode *Node, Instruction *Inst) {
- pImpl->addMD(Kind, Node, Inst);
+void Instruction::setMetadata(const char *Kind, MDNode *Node) {
+ if (Node == 0 && !hasMetadata()) return;
+ setMetadata(getContext().getMetadata().getMDKindID(Kind), Node);
}
-/// removeMD - Remove metadata of given kind attached with an instruction.
-void MetadataContext::removeMD(unsigned Kind, Instruction *Inst) {
- pImpl->removeMD(Kind, Inst);
+MDNode *Instruction::getMetadataImpl(const char *Kind) const {
+ return getMetadataImpl(getContext().getMetadata().getMDKindID(Kind));
}
-/// removeAllMetadata - Remove all metadata attached with an instruction.
-void MetadataContext::removeAllMetadata(Instruction *Inst) {
- pImpl->removeAllMetadata(Inst);
+/// setMetadata - Set the metadata of of the specified kind to the specified
+/// node. This updates/replaces metadata if already present, or removes it if
+/// Node is null.
+void Instruction::setMetadata(unsigned KindID, MDNode *Node) {
+ if (Node == 0 && !hasMetadata()) return;
+
+ getContext().getMetadata().pImpl->setMetadata(this, KindID, Node);
}
-/// copyMD - If metadata is attached with Instruction In1 then attach
-/// the same metadata to In2.
-void MetadataContext::copyMD(Instruction *In1, Instruction *In2) {
- pImpl->copyMD(In1, In2);
+MDNode *Instruction::getMetadataImpl(unsigned KindID) const {
+ return getContext().getMetadata().pImpl->getMetadata(this, KindID);
}
-/// getHandlerNames - Populate client supplied smallvector using custome
-/// metadata name and ID.
-void MetadataContext::
-getHandlerNames(SmallVectorImpl<std::pair<unsigned, StringRef> >&N) const {
- pImpl->getHandlerNames(N);
+void Instruction::getAllMetadataImpl(SmallVectorImpl<std::pair<unsigned,
+ MDNode*> > &Result)const {
+ getContext().getMetadata().pImpl->getAllMetadata(this, Result);
}
-/// ValueIsDeleted - This handler is used to update metadata store
-/// when a value is deleted.
-void MetadataContext::ValueIsDeleted(Instruction *Inst) {
- pImpl->ValueIsDeleted(Inst);
-}
-void MetadataContext::ValueIsRAUWd(Value *V1, Value *V2) {
- pImpl->ValueIsRAUWd(V1, V2);
+/// removeAllMetadata - Remove all metadata from this instruction.
+void Instruction::removeAllMetadata() {
+ assert(hasMetadata() && "Caller should check");
+ getContext().getMetadata().pImpl->removeAllMetadata(this);
}
-/// ValueIsCloned - This handler is used to update metadata store
-/// when In1 is cloned to create In2.
-void MetadataContext::ValueIsCloned(const Instruction *In1, Instruction *In2) {
- pImpl->ValueIsCloned(In1, In2);
-}
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