#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/SmallString.h"
#include "SymbolTableListTraitsImpl.h"
+#include "llvm/Support/LeakDetector.h"
#include "llvm/Support/ValueHandle.h"
using namespace llvm;
/// 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;
}
}
static const Function *getFunctionForValue(Value *V) {
- assert(!isa<MDNode>(V) && "does not iterate over metadata operands");
if (!V) return NULL;
- if (Instruction *I = dyn_cast<Instruction>(V))
- return I->getParent()->getParent();
- if (BasicBlock *BB = dyn_cast<BasicBlock>(V))
- return BB->getParent();
+ 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;
}
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)) {
return assertLocalFunction(this);
#endif
if (!isFunctionLocal()) return NULL;
-
- for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
- if (Value *V = getOperand(i)) {
- if (MDNode *MD = dyn_cast<MDNode>(V)) {
- if (const Function *F = MD->getFunction())
- return F;
- } else {
- return getFunctionForValue(V);
- }
- }
- }
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (const Function *F = getFunctionForValue(getOperand(i)))
+ return F;
return NULL;
}
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;
+
+ // Add all the operand pointers. Note that we don't have to add the
+ // isFunctionLocal bit because that's implied by the operands.
+ // Note that if the operands are later nulled out, the node will be
+ // removed from the uniquing map.
+ FoldingSetNodeID ID;
+ for (unsigned i = 0; i != NumVals; ++i)
+ ID.AddPointer(Vals[i]);
+
+ void *InsertPoint;
+ MDNode *N = NULL;
+
+ if ((N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint)))
+ return N;
+
bool isFunctionLocal = false;
switch (FL) {
case FL_Unknown:
for (unsigned i = 0; i != NumVals; ++i) {
Value *V = Vals[i];
if (!V) continue;
- if (isa<Instruction>(V) || isa<Argument>(V) || isa<BasicBlock>(V) ||
- (isa<MDNode>(V) && cast<MDNode>(V)->isFunctionLocal())) {
+ if (isFunctionLocalValue(V)) {
isFunctionLocal = true;
break;
}
break;
}
- FoldingSetNodeID ID;
- for (unsigned i = 0; i != NumVals; ++i)
- ID.AddPointer(Vals[i]);
- ID.AddBoolean(isFunctionLocal);
-
- void *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);
return N;
}
+MDNode *MDNode::get(LLVMContext &Context, ArrayRef<Value*> Vals) {
+ return getMDNode(Context, Vals.data(), Vals.size(), FL_Unknown);
+}
MDNode *MDNode::get(LLVMContext &Context, Value*const* Vals, unsigned NumVals) {
return getMDNode(Context, Vals, NumVals, FL_Unknown);
}
return getMDNode(Context, Vals, NumVals, FL_Unknown, false);
}
+MDNode *MDNode::getTemporary(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals) {
+ MDNode *N = (MDNode *)malloc(sizeof(MDNode)+NumVals*sizeof(MDNodeOperand));
+ N = new (N) MDNode(Context, Vals, NumVals, FL_No);
+ N->setValueSubclassData(N->getSubclassDataFromValue() |
+ NotUniquedBit);
+ LeakDetector::addGarbageObject(N);
+ return N;
+}
+
+void MDNode::deleteTemporary(MDNode *N) {
+ assert(N->use_empty() && "Temporary MDNode has uses!");
+ assert(!N->getContext().pImpl->MDNodeSet.RemoveNode(N) &&
+ "Deleting a non-temporary uniqued node!");
+ assert(!N->getContext().pImpl->NonUniquedMDNodes.erase(N) &&
+ "Deleting a non-temporary non-uniqued node!");
+ assert((N->getSubclassDataFromValue() & NotUniquedBit) &&
+ "Temporary MDNode does not have NotUniquedBit set!");
+ assert((N->getSubclassDataFromValue() & DestroyFlag) == 0 &&
+ "Temporary MDNode has DestroyFlag set!");
+ LeakDetector::removeGarbageObject(N);
+ N->destroy();
+}
+
/// getOperand - Return specified operand.
Value *MDNode::getOperand(unsigned i) const {
return *getOperandPtr(const_cast<MDNode*>(this), i);
}
void MDNode::Profile(FoldingSetNodeID &ID) const {
+ // Add all the operand pointers. Note that we don't have to add the
+ // isFunctionLocal bit because that's implied by the operands.
+ // Note that if the operands are later nulled out, the node will be
+ // removed from the uniquing map.
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
ID.AddPointer(getOperand(i));
- ID.AddBoolean(isFunctionLocal());
}
void MDNode::setIsNotUniqued() {
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 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.
+ // brings little reuse. Also, this means we don't need to include
+ // isFunctionLocal bits in FoldingSetNodeIDs for MDNodes.
if (To == 0) {
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.
+ // in the set. If so, then this node is redundant.
FoldingSetNodeID ID;
Profile(ID);
void *InsertPoint;
- MDNode *N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
-
- if (N) {
- N->replaceAllUsesWith(this);
- N->destroy();
- N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint);
- assert(N == 0 && "shouldn't be in the map now!"); (void)N;
+ if (MDNode *N = pImpl->MDNodeSet.FindNodeOrInsertPos(ID, InsertPoint)) {
+ replaceAllUsesWith(N);
+ destroy();
+ return;
}
// InsertPoint will have been set by the FindNodeOrInsertPos call.
pImpl->MDNodeSet.InsertNode(this, InsertPoint);
+
+ // If this MDValue was previously function-local but no longer is, clear
+ // its function-local flag.
+ if (isFunctionLocal() && !isFunctionLocalValue(To)) {
+ bool isStillFunctionLocal = false;
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
+ Value *V = getOperand(i);
+ if (!V) continue;
+ if (isFunctionLocalValue(V)) {
+ isStillFunctionLocal = true;
+ break;
+ }
+ }
+ if (!isStillFunctionLocal)
+ setValueSubclassData(getSubclassDataFromValue() & ~FunctionLocalBit);
+ }
}
//===----------------------------------------------------------------------===//
// NamedMDNode implementation.
//
-namespace llvm {
-// SymbolTableListTraits specialization for MDSymbolTable.
-void ilist_traits<NamedMDNode>
-::addNodeToList(NamedMDNode *N) {
- assert(N->getParent() == 0 && "Value already in a container!!");
- Module *Owner = getListOwner();
- N->setParent(Owner);
- MDSymbolTable &ST = Owner->getMDSymbolTable();
- ST.insert(N->getName(), N);
-}
-
-void ilist_traits<NamedMDNode>::removeNodeFromList(NamedMDNode *N) {
- N->setParent(0);
- Module *Owner = getListOwner();
- MDSymbolTable &ST = Owner->getMDSymbolTable();
- ST.remove(N->getName());
-}
-}
-
-static SmallVector<WeakVH, 4> &getNMDOps(void *Operands) {
- return *(SmallVector<WeakVH, 4>*)Operands;
+static SmallVector<TrackingVH<MDNode>, 4> &getNMDOps(void *Operands) {
+ return *(SmallVector<TrackingVH<MDNode>, 4>*)Operands;
}
-NamedMDNode::NamedMDNode(LLVMContext &C, const Twine &N,
- MDNode *const *MDs,
- unsigned NumMDs, Module *ParentModule)
- : Value(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);
-}
-
-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));
+ assert(!M->isFunctionLocal() &&
+ "NamedMDNode operands must not be function-local!");
+ 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();
}
-/// setName - Set the name of this named metadata.
-void NamedMDNode::setName(const Twine &NewName) {
- assert (!NewName.isTriviallyEmpty() && "Invalid named metadata name!");
-
- SmallString<256> NameData;
- StringRef NameRef = NewName.toStringRef(NameData);
-
- // Name isn't changing?
- if (getName() == NameRef)
- return;
-
- Name = NameRef.str();
- if (Parent)
- Parent->getMDSymbolTable().insert(NameRef, this);
-}
-
/// getName - Return a constant reference to this named metadata's name.
StringRef NamedMDNode::getName() const {
return StringRef(Name);
// Handle 'dbg' as a special case since it is not stored in the hash table.
if (KindID == LLVMContext::MD_dbg) {
- DbgInfo = Node;
+ DbgLoc = DebugLoc::getFromDILocation(Node);
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 DbgInfo;
+ return DbgLoc.getAsMDNode(getContext());
if (!hasMetadataHashEntry()) return 0;
Result.clear();
// Handle 'dbg' as a special case since it is not stored in the hash table.
- if (DbgInfo) {
- Result.push_back(std::make_pair((unsigned)LLVMContext::MD_dbg, DbgInfo));
+ if (!DbgLoc.isUnknown()) {
+ Result.push_back(std::make_pair((unsigned)LLVMContext::MD_dbg,
+ DbgLoc.getAsMDNode(getContext())));
if (!hasMetadataHashEntry()) return;
}
array_pod_sort(Result.begin(), Result.end());
}
-/// removeAllMetadata - Remove all metadata from this instruction.
-void Instruction::removeAllMetadata() {
- assert(hasMetadata() && "Caller should check");
- DbgInfo = 0;
- if (hasMetadataHashEntry()) {
- getContext().pImpl->MetadataStore.erase(this);
- setHasMetadataHashEntry(false);
- }
+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.
+ if (Result.size() > 1)
+ array_pod_sort(Result.begin(), Result.end());
+}
+
+
+/// clearMetadataHashEntries - Clear all hashtable-based metadata from
+/// this instruction.
+void Instruction::clearMetadataHashEntries() {
+ assert(hasMetadataHashEntry() && "Caller should check");
+ getContext().pImpl->MetadataStore.erase(this);
+ setHasMetadataHashEntry(false);
}
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