#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;
-}
-
//===----------------------------------------------------------------------===//
// MDNodeOperand implementation.
//
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);
};
/// 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");
+ // 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;
-
+
if (isFunctionLocal)
setValueSubclassData(getSubclassDataFromValue() | FunctionLocalBit);
/// ~MDNode - Destroy MDNode.
MDNode::~MDNode() {
- assert((getSubclassDataFromValue() & DestroyFlag) != 0 &&
+ assert((getSubclassDataFromValue() & DestroyFlag) != 0 &&
"Not being destroyed through destroy()?");
- if (!isNotUniqued()) {
- LLVMContextImpl *pImpl = getType()->getContext().pImpl;
+ 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();
}
+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);
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::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals,
- bool 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) {
- // 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);
+ MDNode *N = NULL;
+
+ if ((N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint)))
+ return N;
- // InsertPoint will have been set by the FindNodeOrInsertPos call.
- pImpl->MDNodeSet.InsertNode(N, InsertPoint);
- }
+ 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;
}
+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);
+}
+
+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 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;
// 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
setIsNotUniqued();
return;
}
-
+
// 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.
//===----------------------------------------------------------------------===//
// NamedMDNode implementation.
//
-static SmallVector<WeakVH, 4> &getNMDOps(void *Operands) {
- return *(SmallVector<WeakVH, 4>*)Operands;
-}
-NamedMDNode::NamedMDNode(LLVMContext &C, const Twine &N,
- MDNode *const *MDs,
- unsigned NumMDs, Module *ParentModule)
- : MetadataBase(Type::getMetadataTy(C), Value::NamedMDNodeVal), Parent(0) {
- setName(N);
-
- Operands = new SmallVector<WeakVH, 4>();
-
- SmallVector<WeakVH, 4> &Node = getNMDOps(Operands);
- for (unsigned i = 0; i != NumMDs; ++i)
- Node.push_back(WeakVH(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<MDNode *, 4> Elems;
- 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);
+NamedMDNode::NamedMDNode(const Twine &N)
+ : Name(N.str()), Parent(0),
+ Operands(new SmallVector<TrackingVH<MDNode>, 4>()) {
}
NamedMDNode::~NamedMDNode() {
/// getOperand - Return specified operand.
MDNode *NamedMDNode::getOperand(unsigned i) const {
assert(i < getNumOperands() && "Invalid Operand number!");
- return dyn_cast_or_null<MDNode>(getNMDOps(Operands)[i]);
+ return dyn_cast<MDNode>(&*getNMDOps(Operands)[i]);
}
/// addOperand - Add metadata Operand.
void NamedMDNode::addOperand(MDNode *M) {
- getNMDOps(Operands).push_back(WeakVH(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();
}
-
-//===----------------------------------------------------------------------===//
-// LLVMContext MDKind naming implementation.
-//
-
-#ifndef NDEBUG
-/// isValidName - Return true if Name is a valid custom metadata handler name.
-static bool 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;
-}
-#endif
-
-/// 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;
-}
-
-/// 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();
+/// getName - Return a constant reference to this named metadata's name.
+StringRef NamedMDNode::getName() const {
+ return StringRef(Name);
}
//===----------------------------------------------------------------------===//
/// Node is null.
void Instruction::setMetadata(unsigned KindID, MDNode *Node) {
if (Node == 0 && !hasMetadata()) return;
+
+ // 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;
+ }
// 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");
+ assert(!Info.empty() == hasMetadataHashEntry() &&
+ "HasMetadata bit is wonked");
if (Info.empty()) {
- setHasMetadata(true);
+ setHasMetadataHashEntry(true);
} else {
// Handle replacement of an existing value.
for (unsigned i = 0, e = Info.size(); i != e; ++i)
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) &&
+ assert(hasMetadataHashEntry() &&
+ 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);
+ 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 == KindID) {
Info[i] = Info.back();
}
MDNode *Instruction::getMetadataImpl(unsigned KindID) const {
- LLVMContextImpl::MDMapTy &Info = getContext().pImpl->MetadataStore[this];
- assert(hasMetadata() && !Info.empty() && "Shouldn't have called this");
+ // Handle 'dbg' as a special case since it is not stored in the hash table.
+ if (KindID == LLVMContext::MD_dbg)
+ return DbgLoc.getAsMDNode(getContext());
+
+ if (!hasMetadataHashEntry()) return 0;
+ LLVMContextImpl::MDMapTy &Info = getContext().pImpl->MetadataStore[this];
+ assert(!Info.empty() && "bit out of sync with hash table");
+
for (LLVMContextImpl::MDMapTy::iterator I = Info.begin(), E = Info.end();
I != E; ++I)
if (I->first == KindID)
}
void Instruction::getAllMetadataImpl(SmallVectorImpl<std::pair<unsigned,
- MDNode*> > &Result)const {
- assert(hasMetadata() && getContext().pImpl->MetadataStore.count(this) &&
+ 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;
+ }
+
+ 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");
-
+
+ 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 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");
+
Result.append(Info.begin(), Info.end());
// Sort the resulting array so it is stable.
array_pod_sort(Result.begin(), Result.end());
}
-/// removeAllMetadata - Remove all metadata from this instruction.
-void Instruction::removeAllMetadata() {
- assert(hasMetadata() && "Caller should check");
+
+/// clearMetadataHashEntries - Clear all hashtable-based metadata from
+/// this instruction.
+void Instruction::clearMetadataHashEntries() {
+ assert(hasMetadataHashEntry() && "Caller should check");
getContext().pImpl->MetadataStore.erase(this);
- setHasMetadata(false);
+ setHasMetadataHashEntry(false);
}
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