#include "llvm/Instruction.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/SmallString.h"
#include "SymbolTableListTraitsImpl.h"
#include "llvm/Support/ValueHandle.h"
using namespace llvm;
//
MDString::MDString(LLVMContext &C, StringRef S)
- : MetadataBase(Type::getMetadataTy(C), Value::MDStringVal), Str(S) {}
+ : Value(Type::getMetadataTy(C), Value::MDStringVal), Str(S) {}
MDString *MDString::get(LLVMContext &Context, StringRef Str) {
LLVMContextImpl *pImpl = Context.pImpl;
- StringMapEntry<MDString *> &Entry =
+ StringMapEntry<MDString *> &Entry =
pImpl->MDStringCache.GetOrCreateValue(Str);
MDString *&S = Entry.getValue();
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;
-}
-
//===----------------------------------------------------------------------===//
-// MDNodeElement implementation.
+// MDNodeOperand implementation.
//
-// Use CallbackVH to hold MDNode elements.
+// Use CallbackVH to hold MDNode operands.
namespace llvm {
-class MDNodeElement : public CallbackVH {
+class MDNodeOperand : public CallbackVH {
MDNode *Parent;
public:
- MDNodeElement() {}
- MDNodeElement(Value *V, MDNode *P) : CallbackVH(V), Parent(P) {}
- ~MDNodeElement() {}
-
- void set(Value *V, MDNode *P) {
+ MDNodeOperand(Value *V, MDNode *P) : CallbackVH(V), Parent(P) {}
+ ~MDNodeOperand() {}
+
+ void set(Value *V) {
setValPtr(V);
- Parent = P;
}
-
+
virtual void deleted();
virtual void allUsesReplacedWith(Value *NV);
};
} // end namespace llvm.
-void MDNodeElement::deleted() {
- Parent->replaceElement(this, 0);
+void MDNodeOperand::deleted() {
+ Parent->replaceOperand(this, 0);
}
-void MDNodeElement::allUsesReplacedWith(Value *NV) {
- Parent->replaceElement(this, NV);
+void MDNodeOperand::allUsesReplacedWith(Value *NV) {
+ Parent->replaceOperand(this, NV);
}
// MDNode implementation.
//
-/// ~MDNode - Destroy MDNode.
-MDNode::~MDNode() {
- LLVMContextImpl *pImpl = getType()->getContext().pImpl;
- pImpl->MDNodeSet.RemoveNode(this);
- delete [] Operands;
- Operands = NULL;
+/// getOperandPtr - Helper function to get the MDNodeOperand's coallocated on
+/// the end of the MDNode.
+static MDNodeOperand *getOperandPtr(MDNode *N, unsigned Op) {
+ // Use <= instead of < to permit a one-past-the-end address.
+ assert(Op <= N->getNumOperands() && "Invalid operand number");
+ return reinterpret_cast<MDNodeOperand*>(N+1)+Op;
}
MDNode::MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals,
bool isFunctionLocal)
- : MetadataBase(Type::getMetadataTy(C), Value::MDNodeVal) {
+: Value(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)
- SubclassData |= FunctionLocalBit;
+ 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()?");
+ LLVMContextImpl *pImpl = getType()->getContext().pImpl;
+ if (isNotUniqued()) {
+ pImpl->NonUniquedMDNodes.erase(this);
+ } else {
+ pImpl->MDNodeSet.RemoveNode(this);
+ }
+
+ // Destroy the operands.
+ for (MDNodeOperand *Op = getOperandPtr(this, 0), *E = Op+NumOperands;
+ Op != E; ++Op)
+ Op->~MDNodeOperand();
}
-MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals,
- bool isFunctionLocal) {
+static const Function *getFunctionForValue(Value *V) {
+ if (!V) return NULL;
+ if (Instruction *I = dyn_cast<Instruction>(V)) {
+ BasicBlock *BB = I->getParent();
+ return BB ? BB->getParent() : 0;
+ }
+ if (Argument *A = dyn_cast<Argument>(V))
+ return A->getParent();
+ if (BasicBlock *BB = dyn_cast<BasicBlock>(V))
+ return BB->getParent();
+ if (MDNode *MD = dyn_cast<MDNode>(V))
+ return MD->getFunction();
+ return NULL;
+}
+
+#ifndef NDEBUG
+static const Function *assertLocalFunction(const MDNode *N) {
+ if (!N->isFunctionLocal()) return 0;
+
+ // FIXME: This does not handle cyclic function local metadata.
+ const Function *F = 0, *NewF = 0;
+ for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
+ if (Value *V = N->getOperand(i)) {
+ if (MDNode *MD = dyn_cast<MDNode>(V))
+ NewF = assertLocalFunction(MD);
+ else
+ NewF = getFunctionForValue(V);
+ }
+ if (F == 0)
+ F = NewF;
+ else
+ assert((NewF == 0 || F == NewF) &&"inconsistent function-local metadata");
+ }
+ return F;
+}
+#endif
+
+// getFunction - If this metadata is function-local and recursively has a
+// function-local operand, return the first such operand's parent function.
+// Otherwise, return null. getFunction() should not be used for performance-
+// critical code because it recursively visits all the MDNode's operands.
+const Function *MDNode::getFunction() const {
+#ifndef NDEBUG
+ return assertLocalFunction(this);
+#endif
+ if (!isFunctionLocal()) return NULL;
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (const Function *F = getFunctionForValue(getOperand(i)))
+ return F;
+ return NULL;
+}
+
+// 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);
+}
+
+/// isFunctionLocalValue - Return true if this is a value that would require a
+/// function-local MDNode.
+static bool isFunctionLocalValue(Value *V) {
+ return isa<Instruction>(V) || isa<Argument>(V) || isa<BasicBlock>(V) ||
+ (isa<MDNode>(V) && cast<MDNode>(V)->isFunctionLocal());
+}
+
+MDNode *MDNode::getMDNode(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals, FunctionLocalness FL,
+ bool Insert) {
LLVMContextImpl *pImpl = Context.pImpl;
+ bool isFunctionLocal = false;
+ switch (FL) {
+ case FL_Unknown:
+ for (unsigned i = 0; i != NumVals; ++i) {
+ Value *V = Vals[i];
+ if (!V) continue;
+ if (isFunctionLocalValue(V)) {
+ isFunctionLocal = true;
+ break;
+ }
+ }
+ break;
+ case FL_No:
+ isFunctionLocal = false;
+ break;
+ case FL_Yes:
+ isFunctionLocal = true;
+ break;
+ }
+
FoldingSetNodeID ID;
for (unsigned i = 0; i != NumVals; ++i)
ID.AddPointer(Vals[i]);
+ ID.AddBoolean(isFunctionLocal);
void *InsertPoint;
- MDNode *N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
- if (!N) {
- // InsertPoint will have been set by the FindNodeOrInsertPos call.
- N = new MDNode(Context, Vals, NumVals, isFunctionLocal);
- pImpl->MDNodeSet.InsertNode(N, InsertPoint);
- }
+ MDNode *N = NULL;
+
+ if ((N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint)))
+ return N;
+
+ if (!Insert)
+ return NULL;
+
+ // 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.
+ 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!
+MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals) {
+ return getMDNode(Context, Vals, NumVals, FL_Unknown);
}
+MDNode *MDNode::getWhenValsUnresolved(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals, bool isFunctionLocal) {
+ return getMDNode(Context, Vals, NumVals, isFunctionLocal ? FL_Yes : FL_No);
+}
-/// getElement - Return specified element.
-Value *MDNode::getElement(unsigned i) const {
- assert(i < getNumElements() && "Invalid element number!");
- return Operands[i];
+MDNode *MDNode::getIfExists(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals) {
+ return getMDNode(Context, Vals, NumVals, FL_Unknown, false);
}
+/// getOperand - Return specified operand.
+Value *MDNode::getOperand(unsigned i) const {
+ return *getOperandPtr(const_cast<MDNode*>(this), i);
+}
+void MDNode::Profile(FoldingSetNodeID &ID) const {
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ ID.AddPointer(getOperand(i));
+ ID.AddBoolean(isFunctionLocal());
+}
+
+void MDNode::setIsNotUniqued() {
+ setValueSubclassData(getSubclassDataFromValue() | NotUniquedBit);
+ LLVMContextImpl *pImpl = getType()->getContext().pImpl;
+ pImpl->NonUniquedMDNodes.insert(this);
+}
-// Replace value from this node's element list.
-void MDNode::replaceElement(MDNodeElement *Op, Value *To) {
+// Replace value from this node's operand list.
+void MDNode::replaceOperand(MDNodeOperand *Op, Value *To) {
Value *From = *Op;
+
+ // If is possible that someone did GV->RAUW(inst), replacing a global variable
+ // with an instruction or some other function-local object. If this is a
+ // non-function-local MDNode, it can't point to a function-local object.
+ // Handle this case by implicitly dropping the MDNode reference to null.
+ // Likewise if the MDNode is function-local but for a different function.
+ if (To && isFunctionLocalValue(To)) {
+ if (!isFunctionLocal())
+ To = 0;
+ else {
+ const Function *F = getFunction();
+ const Function *FV = getFunctionForValue(To);
+ // Metadata can be function-local without having an associated function.
+ // So only consider functions to have changed if non-null.
+ if (F && FV && F != FV)
+ To = 0;
+ }
+ }
if (From == To)
return;
+ // 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);
- // Update the operand.
- Op->set(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;
if (N) {
N->replaceAllUsesWith(this);
- delete N;
+ N->destroy();
N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
assert(N == 0 && "shouldn't be in the map now!"); (void)N;
}
//===----------------------------------------------------------------------===//
// 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]));
- if (ParentModule)
- ParentModule->getNamedMDList().push_back(this);
+static SmallVector<TrackingVH<MDNode>, 4> &getNMDOps(void *Operands) {
+ return *(SmallVector<TrackingVH<MDNode>, 4>*)Operands;
}
-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(const Twine &N)
+ : Name(N.str()), Parent(0),
+ Operands(new SmallVector<TrackingVH<MDNode>, 4>()) {
}
NamedMDNode::~NamedMDNode() {
delete &getNMDOps(Operands);
}
-/// getNumElements - Return number of NamedMDNode elements.
-unsigned NamedMDNode::getNumElements() const {
+/// getNumOperands - Return number of NamedMDNode operands.
+unsigned NamedMDNode::getNumOperands() 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];
+/// getOperand - Return specified operand.
+MDNode *NamedMDNode::getOperand(unsigned i) const {
+ assert(i < getNumOperands() && "Invalid Operand number!");
+ return dyn_cast<MDNode>(&*getNMDOps(Operands)[i]);
}
-/// addElement - Add metadata element.
-void NamedMDNode::addElement(MetadataBase *M) {
- getNMDOps(Operands).push_back(TrackingVH<MetadataBase>(M));
+/// addOperand - Add metadata Operand.
+void NamedMDNode::addOperand(MDNode *M) {
+ getNMDOps(Operands).push_back(TrackingVH<MDNode>(M));
}
/// eraseFromParent - Drop all references and remove the node from parent
/// module.
void NamedMDNode::eraseFromParent() {
- getParent()->getNamedMDList().erase(this);
+ getParent()->eraseNamedMetadata(this);
}
/// dropAllReferences - Remove all uses and clear node vector.
getNMDOps(Operands).clear();
}
+/// getName - Return a constant reference to this named metadata's name.
+StringRef NamedMDNode::getName() const {
+ return StringRef(Name);
+}
//===----------------------------------------------------------------------===//
-// MetadataContextImpl implementation.
+// Instruction Metadata method implementations.
//
-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 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);
-
-
- /// 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);
-};
-}
-
-/// 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();
+void Instruction::setMetadata(const char *Kind, MDNode *Node) {
+ if (Node == 0 && !hasMetadata()) return;
+ setMetadata(getContext().getMDKindID(Kind), Node);
}
-
-/// 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;
+MDNode *Instruction::getMetadataImpl(const char *Kind) const {
+ return getMetadataImpl(getContext().getMDKindID(Kind));
}
-/// 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");
+/// 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;
- Result.clear();
- Result.append(Info.begin(), Info.end());
+ // Handle 'dbg' as a special case since it is not stored in the hash table.
+ if (KindID == LLVMContext::MD_dbg) {
+ DbgLoc = DebugLoc::getFromDILocation(Node);
+ return;
+ }
- // 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");
+ LLVMContextImpl::MDMapTy &Info = getContext().pImpl->MetadataStore[this];
+ assert(!Info.empty() == hasMetadataHashEntry() &&
+ "HasMetadata bit is wonked");
if (Info.empty()) {
- Inst->HasMetadata = true;
+ setHasMetadataHashEntry(true);
} else {
// Handle replacement of an existing value.
for (unsigned i = 0, e = Info.size(); i != e; ++i)
- if (Info[i].first == Kind) {
+ if (Info[i].first == KindID) {
Info[i].second = Node;
return;
}
}
-
+
// No replacement, just add it to the list.
- Info.push_back(std::make_pair(Kind, Node));
+ Info.push_back(std::make_pair(KindID, Node));
return;
}
-
+
// Otherwise, we're removing metadata from an instruction.
- assert(Inst->HasMetadata && MetadataStore.count(Inst) &&
+ assert(hasMetadataHashEntry() &&
+ getContext().pImpl->MetadataStore.count(this) &&
"HasMetadata bit out of date!");
- MDMapTy &Info = MetadataStore[Inst];
+ LLVMContextImpl::MDMapTy &Info = getContext().pImpl->MetadataStore[this];
// Common case is removing the only entry.
- if (Info.size() == 1 && Info[0].first == Kind) {
- MetadataStore.erase(Inst);
- Inst->HasMetadata = false;
+ if (Info.size() == 1 && Info[0].first == KindID) {
+ getContext().pImpl->MetadataStore.erase(this);
+ setHasMetadataHashEntry(false);
return;
}
-
- // Handle replacement of an existing value.
+
+ // Handle removal of an existing value.
for (unsigned i = 0, e = Info.size(); i != e; ++i)
- if (Info[i].first == Kind) {
+ if (Info[i].first == KindID) {
Info[i] = Info.back();
Info.pop_back();
assert(!Info.empty() && "Removing last entry should be handled above");
// 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;
-}
-
-
-/// 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;
+MDNode *Instruction::getMetadataImpl(unsigned KindID) const {
+ // Handle 'dbg' as a special case since it is not stored in the hash table.
+ if (KindID == LLVMContext::MD_dbg)
+ return DbgLoc.getAsMDNode(getContext());
- for (MDMapTy::iterator I = In1Info.begin(), E = In1Info.end(); I != E; ++I)
- In2->setMetadata(I->first, I->second);
-}
-
-/// 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;
- for (MDMapTy::iterator I = In1Info.begin(), E = In1Info.end(); I != E; ++I)
- In2->setMetadata(I->first, I->second);
-}
-
-/// 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;
+ if (!hasMetadataHashEntry()) return 0;
+
+ LLVMContextImpl::MDMapTy &Info = getContext().pImpl->MetadataStore[this];
+ assert(!Info.empty() && "bit out of sync with hash table");
- // FIXME: Give custom handlers a chance to override this.
- ValueIsCloned(I1, I2);
+ for (LLVMContextImpl::MDMapTy::iterator I = Info.begin(), E = Info.end();
+ I != E; ++I)
+ if (I->first == KindID)
+ return I->second;
+ return 0;
}
-//===----------------------------------------------------------------------===//
-// 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;
+void Instruction::getAllMetadataImpl(SmallVectorImpl<std::pair<unsigned,
+ MDNode*> > &Result) const {
+ Result.clear();
+
+ // Handle 'dbg' as a special case since it is not stored in the hash table.
+ if (!DbgLoc.isUnknown()) {
+ Result.push_back(std::make_pair((unsigned)LLVMContext::MD_dbg,
+ DbgLoc.getAsMDNode(getContext())));
+ if (!hasMetadataHashEntry()) return;
}
- 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);
-}
-
-/// 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);
-}
-
-/// 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);
-}
-
-//===----------------------------------------------------------------------===//
-// Instruction Metadata method implementations.
-//
+
+ assert(hasMetadataHashEntry() &&
+ 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");
-void Instruction::setMetadata(const char *Kind, MDNode *Node) {
- if (Node == 0 && !hasMetadata()) return;
- setMetadata(getContext().getMetadata().getMDKindID(Kind), Node);
-}
+ Result.append(Info.begin(), Info.end());
-MDNode *Instruction::getMetadataImpl(const char *Kind) const {
- return getMetadataImpl(getContext().getMetadata().getMDKindID(Kind));
+ // Sort the resulting array so it is stable.
+ if (Result.size() > 1)
+ array_pod_sort(Result.begin(), Result.end());
}
-/// 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;
+void Instruction::
+getAllMetadataOtherThanDebugLocImpl(SmallVectorImpl<std::pair<unsigned,
+ MDNode*> > &Result) const {
+ Result.clear();
+ assert(hasMetadataHashEntry() &&
+ 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");
- getContext().getMetadata().pImpl->setMetadata(this, KindID, Node);
+ 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());
}
-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);
+/// clearMetadataHashEntries - Clear all hashtable-based metadata from
+/// this instruction.
+void Instruction::clearMetadataHashEntries() {
+ assert(hasMetadataHashEntry() && "Caller should check");
+ getContext().pImpl->MetadataStore.erase(this);
+ setHasMetadataHashEntry(false);
}
projects / oota-llvm.git / blobdiff