class SymbolTableListTraits;
-//===----------------------------------------------------------------------===//
-// MetadataBase - A base class for MDNode, MDString and NamedMDNode.
-class MetadataBase : public Value {
-protected:
- MetadataBase(const Type *Ty, unsigned scid)
- : Value(Ty, scid) {}
-
-public:
-
- /// Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const MetadataBase *) { return true; }
- static bool classof(const Value *V) {
- return V->getValueID() == MDStringVal || V->getValueID() == MDNodeVal
- || V->getValueID() == NamedMDNodeVal;
- }
-};
-
//===----------------------------------------------------------------------===//
/// MDString - a single uniqued string.
/// These are used to efficiently contain a byte sequence for metadata.
/// MDString is always unnamd.
-class MDString : public MetadataBase {
+class MDString : public Value {
MDString(const MDString &); // DO NOT IMPLEMENT
StringRef Str;
public:
static MDString *get(LLVMContext &Context, StringRef Str);
- static MDString *get(LLVMContext &Context, const char *Str);
-
+ static MDString *get(LLVMContext &Context, const char *Str) {
+ return get(Context, Str ? StringRef(Str) : StringRef());
+ }
+
StringRef getString() const { return Str; }
unsigned getLength() const { return (unsigned)Str.size(); }
//===----------------------------------------------------------------------===//
/// MDNode - a tuple of other values.
-class MDNode : public MetadataBase, public FoldingSetNode {
+class MDNode : public Value, public FoldingSetNode {
MDNode(const MDNode &); // DO NOT IMPLEMENT
void operator=(const MDNode &); // DO NOT IMPLEMENT
friend class MDNodeOperand;
+ friend class LLVMContextImpl;
/// NumOperands - This many 'MDNodeOperand' items are co-allocated onto the
/// end of this MDNode.
FunctionLocalBit = 1 << 0,
/// NotUniquedBit - This is set on MDNodes that are not uniqued because they
- /// have a null perand.
+ /// have a null operand.
NotUniquedBit = 1 << 1,
/// DestroyFlag - This bit is set by destroy() so the destructor can assert
DestroyFlag = 1 << 2
};
- // Replace each instance of F from the operand list of this node with T.
+ // FunctionLocal enums.
+ enum FunctionLocalness {
+ FL_Unknown = -1,
+ FL_No = 0,
+ FL_Yes = 1
+ };
+
+ /// replaceOperand - Replace each instance of F from the operand list of this
+ /// node with T.
void replaceOperand(MDNodeOperand *Op, Value *NewVal);
~MDNode();
protected:
explicit MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals,
bool isFunctionLocal);
+
+ static MDNode *getMDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals,
+ FunctionLocalness FL, bool Insert = true);
public:
// Constructors and destructors.
- static MDNode *get(LLVMContext &Context, Value *const *Vals, unsigned NumVals,
- bool isFunctionLocal = false);
+ static MDNode *get(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals);
+ // getWhenValsUnresolved - Construct MDNode determining function-localness
+ // from isFunctionLocal argument, not by analyzing Vals.
+ static MDNode *getWhenValsUnresolved(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals, bool isFunctionLocal);
+
+ static MDNode *getIfExists(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals);
/// getOperand - Return specified operand.
Value *getOperand(unsigned i) const;
bool isFunctionLocal() const {
return (getSubclassDataFromValue() & FunctionLocalBit) != 0;
}
+
+ // 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 *getFunction() const;
// destroy - Delete this node. Only when there are no uses.
void destroy();
bool isNotUniqued() const {
return (getSubclassDataFromValue() & NotUniquedBit) != 0;
}
- void setIsNotUniqued() {
- setValueSubclassData(getSubclassDataFromValue() | NotUniquedBit);
- }
+ void setIsNotUniqued();
// Shadow Value::setValueSubclassData with a private forwarding method so that
// any future subclasses cannot accidentally use it.
};
//===----------------------------------------------------------------------===//
-/// NamedMDNode - a tuple of other metadata.
+/// NamedMDNode - a tuple of MDNodes.
/// NamedMDNode is always named. All NamedMDNode operand has a type of metadata.
-class NamedMDNode : public MetadataBase, public ilist_node<NamedMDNode> {
+class NamedMDNode : public Value, public ilist_node<NamedMDNode> {
friend class SymbolTableListTraits<NamedMDNode, Module>;
+ friend struct ilist_traits<NamedMDNode>;
friend class LLVMContextImpl;
-
NamedMDNode(const NamedMDNode &); // DO NOT IMPLEMENT
+ std::string Name;
Module *Parent;
- void *Operands; // SmallVector<TrackingVH<MetadataBase>, 4>
+ void *Operands; // SmallVector<TrackingVH<MDNode>, 4>
void setParent(Module *M) { Parent = M; }
protected:
- explicit NamedMDNode(LLVMContext &C, const Twine &N, MetadataBase*const *Vals,
+ explicit NamedMDNode(LLVMContext &C, const Twine &N, MDNode*const *Vals,
unsigned NumVals, Module *M = 0);
public:
- static NamedMDNode *Create(LLVMContext &C, const Twine &N,
- MetadataBase *const *MDs,
+ static NamedMDNode *Create(LLVMContext &C, const Twine &N,
+ MDNode *const *MDs,
unsigned NumMDs, Module *M = 0) {
return new NamedMDNode(C, N, MDs, NumMDs, M);
}
inline const Module *getParent() const { return Parent; }
/// getOperand - Return specified operand.
- MetadataBase *getOperand(unsigned i) const;
+ MDNode *getOperand(unsigned i) const;
/// getNumOperands - Return the number of NamedMDNode operands.
unsigned getNumOperands() const;
/// addOperand - Add metadata operand.
- void addOperand(MetadataBase *M);
-
+ void addOperand(MDNode *M);
+
+ /// setName - Set the name of this named metadata.
+ void setName(const Twine &NewName);
+
+ /// getName - Return a constant reference to this named metadata's name.
+ StringRef getName() const;
+
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const NamedMDNode *) { return true; }
static bool classof(const Value *V) {
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