#include "llvm/Support/ValueHandle.h"
using namespace llvm;
-//===----------------------------------------------------------------------===//
-// MetadataBase implementation.
-//
-
//===----------------------------------------------------------------------===//
// MDString implementation.
//
Operands[i].set(Vals[i], this);
if (isFunctionLocal)
- SubclassData |= FunctionLocalBit;
+ setValueSubclassData(getSubclassDataFromValue() | FunctionLocalBit);
}
MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals,
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!
}
}
-//===----------------------------------------------------------------------===//
-// 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<std::pair<unsigned, MDNode*> > &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;
-}
-
-/// 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();
-}
-
-/// 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));
-}
-
-/// 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<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);
-}
-
//===----------------------------------------------------------------------===//
// MetadataContext 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;
}
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, 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);
-}
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