//
//===----------------------------------------------------------------------===//
-#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;
//===----------------------------------------------------------------------===//
-//MDString implementation
+// MDString implementation.
//
-MDString *MDString::get(LLVMContext &Context, const StringRef &Str) {
+
+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;
- sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
StringMapEntry<MDString *> &Entry =
pImpl->MDStringCache.GetOrCreateValue(Str);
MDString *&S = Entry.getValue();
- if (!S) S = new MDString(Entry.getKeyData(),
- Entry.getKeyLength());
+ if (!S) S = new MDString(Context, Entry.getKey());
+ return S;
+}
+MDString *MDString::get(LLVMContext &Context, const char *Str) {
+ LLVMContextImpl *pImpl = Context.pImpl;
+ StringMapEntry<MDString *> &Entry =
+ pImpl->MDStringCache.GetOrCreateValue(Str ? StringRef(Str) : StringRef());
+ MDString *&S = Entry.getValue();
+ if (!S) S = new MDString(Context, Entry.getKey());
return S;
}
//===----------------------------------------------------------------------===//
-//MDNode implementation
+// MDNodeElement implementation.
//
-MDNode::MDNode(Value*const* Vals, unsigned NumVals)
- : MetadataBase(Type::MetadataTy, Value::MDNodeVal) {
- for (unsigned i = 0; i != NumVals; ++i)
- Node.push_back(WeakVH(Vals[i]));
+
+// Use CallbackVH to hold MDNode elements.
+namespace llvm {
+class MDNodeElement : public CallbackVH {
+ MDNode *Parent;
+public:
+ MDNodeElement() {}
+ 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);
+};
+} // end namespace llvm.
+
+
+void MDNodeElement::deleted() {
+ Parent->replaceElement(this, 0);
}
-void MDNode::Profile(FoldingSetNodeID &ID) const {
- for (const_elem_iterator I = elem_begin(), E = elem_end(); I != E; ++I)
- ID.AddPointer(*I);
+void MDNodeElement::allUsesReplacedWith(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) {
+ NumOperands = NumVals;
+ Operands = new MDNodeElement[NumOperands];
+
+ for (unsigned i = 0; i != NumVals; ++i)
+ Operands[i].set(Vals[i], this);
+
+ if (isFunctionLocal)
+ setValueSubclassData(getSubclassDataFromValue() | FunctionLocalBit);
}
-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)
ID.AddPointer(Vals[i]);
- pImpl->ConstantsLock.reader_acquire();
void *InsertPoint;
MDNode *N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
- pImpl->ConstantsLock.reader_release();
-
if (!N) {
- sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
+ // InsertPoint will have been set by the FindNodeOrInsertPos call.
+ N = new MDNode(Context, Vals, NumVals, isFunctionLocal);
+ pImpl->MDNodeSet.InsertNode(N, InsertPoint);
+ }
+ return N;
+}
+
+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 Operands[i];
+}
+
+
+
+// Replace value from this node's element list.
+void MDNode::replaceElement(MDNodeElement *Op, Value *To) {
+ Value *From = *Op;
+
+ if (From == To)
+ 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);
+
+ // 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
+ // updated "this" into the folding node set, replace all uses of existing
+ // node with updated "this" node.
+ FoldingSetNodeID ID;
+ Profile(ID);
+ void *InsertPoint;
+ MDNode *N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
+
+ if (N) {
+ N->replaceAllUsesWith(this);
+ delete N;
N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
- if (!N) {
- // InsertPoint will have been set by the FindNodeOrInsertPos call.
- N = new MDNode(Vals, NumVals);
- pImpl->MDNodeSet.InsertNode(N, InsertPoint);
- }
+ assert(N == 0 && "shouldn't be in the map now!"); (void)N;
}
- return N;
+ // InsertPoint will have been set by the FindNodeOrInsertPos call.
+ pImpl->MDNodeSet.InsertNode(this, InsertPoint);
}
//===----------------------------------------------------------------------===//
-//NamedMDNode implementation
+// NamedMDNode implementation.
//
-NamedMDNode::NamedMDNode(const Twine &N, MetadataBase*const* MDs,
+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::MetadataTy, Value::NamedMDNodeVal), Parent(0) {
+ : 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(WeakMetadataVH(MDs[i]));
+ Node.push_back(TrackingVH<MetadataBase>(MDs[i]));
+
if (ParentModule)
ParentModule->getNamedMDList().push_back(this);
}
+
+NamedMDNode *NamedMDNode::Create(const NamedMDNode *NMD, Module *M) {
+ assert(NMD && "Invalid source NamedMDNode!");
+ SmallVector<MetadataBase *, 4> Elems;
+ Elems.reserve(NMD->getNumElements());
+
+ for (unsigned i = 0, e = NMD->getNumElements(); i != e; ++i)
+ Elems.push_back(NMD->getElement(i));
+ return new NamedMDNode(NMD->getContext(), NMD->getName().data(),
+ Elems.data(), Elems.size(), M);
+}
+
+NamedMDNode::~NamedMDNode() {
+ dropAllReferences();
+ delete &getNMDOps(Operands);
+}
+
+/// getNumElements - Return number of NamedMDNode elements.
+unsigned NamedMDNode::getNumElements() const {
+ return (unsigned)getNMDOps(Operands).size();
+}
+
+/// getElement - Return specified element.
+MetadataBase *NamedMDNode::getElement(unsigned i) const {
+ assert(i < getNumElements() && "Invalid element number!");
+ return getNMDOps(Operands)[i];
+}
+
+/// addElement - Add metadata element.
+void NamedMDNode::addElement(MetadataBase *M) {
+ getNMDOps(Operands).push_back(TrackingVH<MetadataBase>(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() {
+ getNMDOps(Operands).clear();
+}
+
+
+//===----------------------------------------------------------------------===//
+// 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:
+ // Name <-> ID mapping methods.
+ unsigned getMDKindID(StringRef Name);
+ void getMDKindNames(SmallVectorImpl<StringRef> &) const;
+
+
+ // 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);
+};
+}
+
+/// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
+unsigned MetadataContextImpl::getMDKindID(StringRef Name) {
+ unsigned &Entry = MDHandlerNames[Name];
+
+ // If this is new, assign it its ID.
+ if (Entry == 0) Entry = MDHandlerNames.size();
+ return Entry;
+}
+
+/// 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();
+}
+
+
+/// 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];
+ 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;
+}
+
+/// 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];
+
+ // Common case is removing the only entry.
+ if (Info.size() == 1 && Info[0].first == Kind) {
+ MetadataStore.erase(Inst);
+ Inst->setHasMetadata(false);
+ return;
+ }
+
+ // 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->setHasMetadata(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)
+ In2->setMetadata(I->first, I->second);
+}
+
+//===----------------------------------------------------------------------===//
+// MetadataContext implementation.
+//
+MetadataContext::MetadataContext() : pImpl(new MetadataContextImpl()) { }
+MetadataContext::~MetadataContext() { delete pImpl; }
+
+/// isValidName - Return true if Name is a valid custom metadata handler name.
+bool MetadataContext::isValidName(StringRef MDName) {
+ if (MDName.empty())
+ return false;
+
+ if (!isalpha(MDName[0]))
+ return false;
+
+ for (StringRef::iterator I = MDName.begin() + 1, E = MDName.end(); I != E;
+ ++I) {
+ if (!isalnum(*I) && *I != '_' && *I != '-' && *I != '.')
+ return false;
+ }
+ return true;
+}
+
+/// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
+unsigned MetadataContext::getMDKindID(StringRef Name) const {
+ return pImpl->getMDKindID(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);
+}
+
+/// getHandlerNames - Populate client supplied smallvector using custome
+/// metadata name and ID.
+void MetadataContext::getMDKindNames(SmallVectorImpl<StringRef> &N) const {
+ pImpl->getMDKindNames(N);
+}
+
+//===----------------------------------------------------------------------===//
+// Instruction Metadata method implementations.
+//
+
+void Instruction::setMetadata(const char *Kind, MDNode *Node) {
+ if (Node == 0 && !hasMetadata()) return;
+ setMetadata(getContext().getMetadata().getMDKindID(Kind), Node);
+}
+
+MDNode *Instruction::getMetadataImpl(const char *Kind) const {
+ return getMetadataImpl(getContext().getMetadata().getMDKindID(Kind));
+}
+
+/// 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);
+}
+
+MDNode *Instruction::getMetadataImpl(unsigned KindID) const {
+ return getContext().getMetadata().pImpl->getMetadata(this, KindID);
+}
+
+void Instruction::getAllMetadataImpl(SmallVectorImpl<std::pair<unsigned,
+ MDNode*> > &Result)const {
+ getContext().getMetadata().pImpl->getAllMetadata(this, Result);
+}
+
+/// removeAllMetadata - Remove all metadata from this instruction.
+void Instruction::removeAllMetadata() {
+ assert(hasMetadata() && "Caller should check");
+ getContext().getMetadata().pImpl->removeAllMetadata(this);
+}
+
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