diff options
Diffstat (limited to 'lib/VMCore/Metadata.cpp')
| -rw-r--r-- | lib/VMCore/Metadata.cpp | 585 |
1 files changed, 260 insertions, 325 deletions
diff --git a/lib/VMCore/Metadata.cpp b/lib/VMCore/Metadata.cpp index b80b6bf..8e9aab9 100644 --- a/lib/VMCore/Metadata.cpp +++ b/lib/VMCore/Metadata.cpp @@ -11,23 +11,24 @@ // //===----------------------------------------------------------------------===// -#include "LLVMContextImpl.h" #include "llvm/Metadata.h" +#include "LLVMContextImpl.h" #include "llvm/LLVMContext.h" #include "llvm/Module.h" #include "llvm/Instruction.h" #include "llvm/ADT/DenseMap.h" #include "llvm/ADT/StringMap.h" #include "SymbolTableListTraitsImpl.h" +#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 = @@ -47,23 +48,89 @@ MDString *MDString::get(LLVMContext &Context, const char *Str) { } //===----------------------------------------------------------------------===// +// MDNodeOperand implementation. +// + +// Use CallbackVH to hold MDNode operands. +namespace llvm { +class MDNodeOperand : public CallbackVH { + MDNode *Parent; +public: + MDNodeOperand(Value *V, MDNode *P) : CallbackVH(V), Parent(P) {} + ~MDNodeOperand() {} + + void set(Value *V) { + setValPtr(V); + } + + virtual void deleted(); + virtual void allUsesReplacedWith(Value *NV); +}; +} // end namespace llvm. + + +void MDNodeOperand::deleted() { + Parent->replaceOperand(this, 0); +} + +void MDNodeOperand::allUsesReplacedWith(Value *NV) { + Parent->replaceOperand(this, NV); +} + + + +//===----------------------------------------------------------------------===// // MDNode implementation. // -MDNode::MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals) - : MetadataBase(Type::getMetadataTy(C), Value::MDNodeVal) { - NodeSize = NumVals; - Node = new ElementVH[NodeSize]; - ElementVH *Ptr = Node; - for (unsigned i = 0; i != NumVals; ++i) - *Ptr++ = ElementVH(Vals[i], this); + +/// getOperandPtr - Helper function to get the MDNodeOperand's coallocated on +/// the end of the MDNode. +static MDNodeOperand *getOperandPtr(MDNode *N, unsigned Op) { + assert(Op < N->getNumOperands() && "Invalid operand number"); + return reinterpret_cast<MDNodeOperand*>(N+1)+Op; } -void MDNode::Profile(FoldingSetNodeID &ID) const { - for (unsigned i = 0, e = getNumElements(); i != e; ++i) - ID.AddPointer(getElement(i)); +MDNode::MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals, + bool isFunctionLocal) +: MetadataBase(Type::getMetadataTy(C), Value::MDNodeVal) { + NumOperands = NumVals; + + if (isFunctionLocal) + setValueSubclassData(getSubclassDataFromValue() | FunctionLocalBit); + + // Initialize the operand list, which is co-allocated on the end of the node. + for (MDNodeOperand *Op = getOperandPtr(this, 0), *E = Op+NumOperands; + Op != E; ++Op, ++Vals) + new (Op) MDNodeOperand(*Vals, this); +} + + +/// ~MDNode - Destroy MDNode. +MDNode::~MDNode() { + assert((getSubclassDataFromValue() & DestroyFlag) != 0 && + "Not being destroyed through destroy()?"); + if (!isNotUniqued()) { + LLVMContextImpl *pImpl = getType()->getContext().pImpl; + pImpl->MDNodeSet.RemoveNode(this); + } + + // Destroy the operands. + for (MDNodeOperand *Op = getOperandPtr(this, 0), *E = Op+NumOperands; + Op != E; ++Op) + Op->~MDNodeOperand(); +} + +// destroy - Delete this node. Only when there are no uses. +void MDNode::destroy() { + setValueSubclassData(getSubclassDataFromValue() | DestroyFlag); + // Placement delete, the free the memory. + this->~MDNode(); + free(this); } -MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals) { + +MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals, + bool isFunctionLocal) { LLVMContextImpl *pImpl = Context.pImpl; FoldingSetNodeID ID; for (unsigned i = 0; i != NumVals; ++i) @@ -72,56 +139,58 @@ MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals) { void *InsertPoint; MDNode *N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint); if (!N) { + // Coallocate space for the node and Operands together, then placement new. + void *Ptr = malloc(sizeof(MDNode)+NumVals*sizeof(MDNodeOperand)); + N = new (Ptr) MDNode(Context, Vals, NumVals, isFunctionLocal); + // InsertPoint will have been set by the FindNodeOrInsertPos call. - N = new MDNode(Context, Vals, NumVals); pImpl->MDNodeSet.InsertNode(N, InsertPoint); } return N; } -/// ~MDNode - Destroy MDNode. -MDNode::~MDNode() { - LLVMContextImpl *pImpl = getType()->getContext().pImpl; - pImpl->MDNodeSet.RemoveNode(this); - delete [] Node; - Node = NULL; +/// getOperand - Return specified operand. +Value *MDNode::getOperand(unsigned i) const { + return *getOperandPtr(const_cast<MDNode*>(this), i); } -// Replace value from this node's element list. -void MDNode::replaceElement(Value *From, Value *To) { - if (From == To || !getType()) - return; - LLVMContext &Context = getType()->getContext(); - LLVMContextImpl *pImpl = Context.pImpl; +void MDNode::Profile(FoldingSetNodeID &ID) const { + for (unsigned i = 0, e = getNumOperands(); i != e; ++i) + ID.AddPointer(getOperand(i)); +} - // 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()) +// Replace value from this node's operand list. +void MDNode::replaceOperand(MDNodeOperand *Op, Value *To) { + Value *From = *Op; + + if (From == To) return; - // Remove "this" from the context map. + // Update the operand. + Op->set(To); + + // If this node is already not being uniqued (because one of the operands + // already went to null), then there is nothing else to do here. + if (isNotUniqued()) return; + + LLVMContextImpl *pImpl = getType()->getContext().pImpl; + + // 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] = ElementVH(To, this); + // If we are dropping an argument to null, we choose to not unique the MDNode + // anymore. This commonly occurs during destruction, and uniquing these + // brings little reuse. + if (To == 0) { + setIsNotUniqued(); + return; } - - // Insert updated "this" into the context's folding node set. - // If a node with same element list already exist then before inserting - // updated "this" into the folding node set, replace all uses of existing - // node with updated "this" node. + + // Now that the node is out of the folding set, get ready to reinsert it. + // First, check to see if another node with the same operands already exists + // in the set. If it doesn't exist, this returns the position to insert it. FoldingSetNodeID ID; Profile(ID); void *InsertPoint; @@ -129,27 +198,31 @@ void MDNode::replaceElement(Value *From, Value *To) { if (N) { N->replaceAllUsesWith(this); - delete N; - N = 0; + N->destroy(); + 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); - } + // InsertPoint will have been set by the FindNodeOrInsertPos call. + pImpl->MDNodeSet.InsertNode(this, InsertPoint); } //===----------------------------------------------------------------------===// // NamedMDNode implementation. // +static SmallVector<TrackingVH<MetadataBase>, 4> &getNMDOps(void *Operands) { + return *(SmallVector<TrackingVH<MetadataBase>, 4>*)Operands; +} + NamedMDNode::NamedMDNode(LLVMContext &C, const Twine &N, MetadataBase *const *MDs, unsigned NumMDs, Module *ParentModule) : MetadataBase(Type::getMetadataTy(C), Value::NamedMDNodeVal), Parent(0) { setName(N); - + + Operands = new SmallVector<TrackingVH<MetadataBase>, 4>(); + + SmallVector<TrackingVH<MetadataBase>, 4> &Node = getNMDOps(Operands); for (unsigned i = 0; i != NumMDs; ++i) Node.push_back(TrackingVH<MetadataBase>(MDs[i])); @@ -160,243 +233,54 @@ NamedMDNode::NamedMDNode(LLVMContext &C, const Twine &N, NamedMDNode *NamedMDNode::Create(const NamedMDNode *NMD, Module *M) { assert(NMD && "Invalid source NamedMDNode!"); SmallVector<MetadataBase *, 4> Elems; - for (unsigned i = 0, e = NMD->getNumElements(); i != e; ++i) - Elems.push_back(NMD->getElement(i)); + Elems.reserve(NMD->getNumOperands()); + + for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) + Elems.push_back(NMD->getOperand(i)); return new NamedMDNode(NMD->getContext(), NMD->getName().data(), Elems.data(), Elems.size(), M); } -/// eraseFromParent - Drop all references and remove the node from parent -/// module. -void NamedMDNode::eraseFromParent() { - getParent()->getNamedMDList().erase(this); -} - -/// dropAllReferences - Remove all uses and clear node vector. -void NamedMDNode::dropAllReferences() { - Node.clear(); -} - NamedMDNode::~NamedMDNode() { dropAllReferences(); + delete &getNMDOps(Operands); } -//===----------------------------------------------------------------------===// -// MetadataContextImpl implementation. -// -namespace llvm { -class MetadataContextImpl { -public: - typedef std::pair<unsigned, TrackingVH<MDNode> > MDPairTy; - typedef SmallVector<MDPairTy, 2> MDMapTy; - typedef DenseMap<const Instruction *, MDMapTy> MDStoreTy; - friend class BitcodeReader; -private: - - /// MetadataStore - Collection of metadata used in this context. - MDStoreTy MetadataStore; - - /// MDHandlerNames - Map to hold metadata handler names. - 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<MDPairTy> &MDs) const; - - /// addMD - Attach the metadata of given kind to an Instruction. - void addMD(unsigned Kind, MDNode *Node, Instruction *Inst); - - /// 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); - - /// 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; +/// getNumOperands - Return number of NamedMDNode operands. +unsigned NamedMDNode::getNumOperands() const { + return (unsigned)getNMDOps(Operands).size(); } -/// 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; - - return I->getValue(); +/// getOperand - Return specified operand. +MetadataBase *NamedMDNode::getOperand(unsigned i) const { + assert(i < getNumOperands() && "Invalid Operand number!"); + return getNMDOps(Operands)[i]; } -/// 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; - MDMapTy &Info = MetadataStore[Inst]; - if (Info.empty()) { - Info.push_back(std::make_pair(MDKind, Node)); - MetadataStore.insert(std::make_pair(Inst, Info)); - return; - } - - // 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; - } - } - - // Otherwise add a new entry. - Info.push_back(std::make_pair(MDKind, Node)); +/// addOperand - Add metadata Operand. +void NamedMDNode::addOperand(MetadataBase *M) { + getNMDOps(Operands).push_back(TrackingVH<MetadataBase>(M)); } -/// 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()) - 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); - return; - } - } -} - -/// removeAllMetadata - Remove all metadata attached with an instruction. -void MetadataContextImpl::removeAllMetadata(Instruction *Inst) { - MetadataStore.erase(Inst); - Inst->HasMetadata = false; -} - -/// copyMD - If metadata is attached with Instruction In1 then attach -/// the same metadata to In2. -void MetadataContextImpl::copyMD(Instruction *In1, Instruction *In2) { - assert(In1 && In2 && "Invalid instruction!"); - 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<MDPairTy> &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()); +/// eraseFromParent - Drop all references and remove the node from parent +/// module. +void NamedMDNode::eraseFromParent() { + getParent()->getNamedMDList().erase(this); } -/// 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); +/// dropAllReferences - Remove all uses and clear node vector. +void NamedMDNode::dropAllReferences() { + getNMDOps(Operands).clear(); } -/// 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); -} //===----------------------------------------------------------------------===// -// MetadataContext implementation. +// LLVMContext MDKind naming implementation. // -MetadataContext::MetadataContext() - : pImpl(new MetadataContextImpl()) { } -MetadataContext::~MetadataContext() { delete pImpl; } +#ifndef NDEBUG /// isValidName - Return true if Name is a valid custom metadata handler name. -bool MetadataContext::isValidName(StringRef MDName) { +static bool isValidName(StringRef MDName) { if (MDName.empty()) return false; @@ -410,72 +294,123 @@ bool MetadataContext::isValidName(StringRef MDName) { } return true; } +#endif -/// 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); -} - -/// 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); +/// getMDKindID - Return a unique non-zero ID for the specified metadata kind. +unsigned LLVMContext::getMDKindID(StringRef Name) const { + assert(isValidName(Name) && "Invalid MDNode name"); + + unsigned &Entry = pImpl->CustomMDKindNames[Name]; + + // If this is new, assign it its ID. + if (Entry == 0) Entry = pImpl->CustomMDKindNames.size(); + return Entry; } -/// 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 LLVMContext::getMDKindNames(SmallVectorImpl<StringRef> &Names) const { + Names.resize(pImpl->CustomMDKindNames.size()+1); + Names[0] = ""; + for (StringMap<unsigned>::const_iterator I = pImpl->CustomMDKindNames.begin(), + E = pImpl->CustomMDKindNames.end(); I != E; ++I) + // MD Handlers are numbered from 1. + Names[I->second] = I->first(); } -/// getMDs - Get the metadata attached to an Instruction. -void MetadataContext:: -getMDs(const Instruction *Inst, - SmallVectorImpl<std::pair<unsigned, TrackingVH<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().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().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; + + // Handle the case when we're adding/updating metadata on an instruction. + if (Node) { + LLVMContextImpl::MDMapTy &Info = getContext().pImpl->MetadataStore[this]; + assert(!Info.empty() == hasMetadata() && "HasMetadata bit is wonked"); + if (Info.empty()) { + setHasMetadata(true); + } else { + // Handle replacement of an existing value. + for (unsigned i = 0, e = Info.size(); i != e; ++i) + if (Info[i].first == KindID) { + Info[i].second = Node; + return; + } + } + + // No replacement, just add it to the list. + Info.push_back(std::make_pair(KindID, Node)); + return; + } + + // Otherwise, we're removing metadata from an instruction. + assert(hasMetadata() && getContext().pImpl->MetadataStore.count(this) && + "HasMetadata bit out of date!"); + LLVMContextImpl::MDMapTy &Info = getContext().pImpl->MetadataStore[this]; + + // Common case is removing the only entry. + if (Info.size() == 1 && Info[0].first == KindID) { + getContext().pImpl->MetadataStore.erase(this); + setHasMetadata(false); + return; + } + + // Handle replacement of an existing value. + for (unsigned i = 0, e = Info.size(); i != e; ++i) + if (Info[i].first == KindID) { + 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. } -/// 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 { + LLVMContextImpl::MDMapTy &Info = getContext().pImpl->MetadataStore[this]; + assert(hasMetadata() && !Info.empty() && "Shouldn't have called this"); + + for (LLVMContextImpl::MDMapTy::iterator I = Info.begin(), E = Info.end(); + I != E; ++I) + if (I->first == KindID) + return I->second; + return 0; } -/// 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 { + assert(hasMetadata() && getContext().pImpl->MetadataStore.count(this) && + "Shouldn't have called this"); + const LLVMContextImpl::MDMapTy &Info = + getContext().pImpl->MetadataStore.find(this)->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()); } -/// 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().pImpl->MetadataStore.erase(this); + setHasMetadata(false); } -/// 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); -} |
