//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_MDNODE_H
-#define LLVM_MDNODE_H
+#ifndef LLVM_METADATA_H
+#define LLVM_METADATA_H
#include "llvm/Value.h"
-#include "llvm/Type.h"
-#include "llvm/OperandTraits.h"
#include "llvm/ADT/FoldingSet.h"
-#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/ilist_node.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/ValueHandle.h"
namespace llvm {
class Constant;
-
-//===----------------------------------------------------------------------===//
-// MetadataBase - A base class for MDNode, MDString and NamedMDNode.
-class MetadataBase : public Value {
-protected:
- MetadataBase(const Type *Ty, unsigned scid)
- : Value(Ty, scid) {}
-
-public:
- /// getType() specialization - Type is always MetadataTy.
- ///
- inline const Type *getType() const {
- return Type::MetadataTy;
- }
-
- /// isNullValue - Return true if this is the value that would be returned by
- /// getNullValue. This always returns false because getNullValue will never
- /// produce metadata.
- virtual bool isNullValue() const {
- return false;
- }
-
- /// Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const MDString *) { return true; }
- static bool classof(const Value *V) {
- return V->getValueID() == MDStringVal || V->getValueID() == MDNodeVal
- || V->getValueID() == NamedMDNodeVal;
- }
-};
-
+class Instruction;
+class LLVMContext;
+class Module;
+template <typename T> class SmallVectorImpl;
+template<typename ValueSubClass, typename ItemParentClass>
+ class SymbolTableListTraits;
+
+
//===----------------------------------------------------------------------===//
/// 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;
- friend class LLVMContextImpl;
+ StringRef Str;
protected:
- explicit MDString(const char *begin, unsigned l)
- : MetadataBase(Type::MetadataTy, Value::MDStringVal), Str(begin, l) {}
+ explicit MDString(LLVMContext &C, StringRef S);
public:
+ static MDString *get(LLVMContext &Context, StringRef Str);
+ static MDString *get(LLVMContext &Context, const char *Str) {
+ return get(Context, Str ? StringRef(Str) : StringRef());
+ }
+
StringRef getString() const { return Str; }
- unsigned length() const { return Str.size(); }
+ unsigned getLength() const { return (unsigned)Str.size(); }
+ typedef StringRef::iterator iterator;
+
/// begin() - Pointer to the first byte of the string.
///
- const char *begin() const { return Str.begin(); }
+ iterator begin() const { return Str.begin(); }
/// end() - Pointer to one byte past the end of the string.
///
- const char *end() const { return Str.end(); }
+ iterator end() const { return Str.end(); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MDString *) { return true; }
}
};
+
+class MDNodeOperand;
+
//===----------------------------------------------------------------------===//
/// MDNode - a tuple of other values.
-/// These contain a list of the values that represent the metadata.
-/// MDNode is always unnamed.
-class MDNode : public MetadataBase, public FoldingSetNode {
- MDNode(const MDNode &); // DO NOT IMPLEMENT
-
+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;
- SmallVector<WeakVH, 4> Node;
- typedef SmallVectorImpl<WeakVH>::iterator elem_iterator;
+ /// NumOperands - This many 'MDNodeOperand' items are co-allocated onto the
+ /// end of this MDNode.
+ unsigned NumOperands;
+
+ // Subclass data enums.
+ enum {
+ /// FunctionLocalBit - This bit is set if this MDNode is function local.
+ /// This is true when it (potentially transitively) contains a reference to
+ /// something in a function, like an argument, basicblock, or instruction.
+ FunctionLocalBit = 1 << 0,
+
+ /// NotUniquedBit - This is set on MDNodes that are not uniqued because they
+ /// have a null perand.
+ NotUniquedBit = 1 << 1,
+
+ /// DestroyFlag - This bit is set by destroy() so the destructor can assert
+ /// that the node isn't being destroyed with a plain 'delete'.
+ DestroyFlag = 1 << 2
+ };
+
+ // 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(Value*const* Vals, unsigned NumVals);
+ 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:
- typedef SmallVectorImpl<WeakVH>::const_iterator const_elem_iterator;
-
- Value *getElement(unsigned i) const {
- return Node[i];
- }
-
- unsigned getNumElements() const {
- return Node.size();
- }
-
- bool elem_empty() const {
- return Node.empty();
- }
-
- const_elem_iterator elem_begin() const {
- return Node.begin();
- }
-
- const_elem_iterator elem_end() const {
- return Node.end();
- }
-
- /// getType() specialization - Type is always MetadataTy.
- ///
- inline const Type *getType() const {
- return Type::MetadataTy;
+ // Constructors and destructors.
+ 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;
+
+ /// getNumOperands - Return number of MDNode operands.
+ unsigned getNumOperands() const { return NumOperands; }
+
+ /// isFunctionLocal - Return whether MDNode is local to a function.
+ /// Note: MDNodes are designated as function-local when created, and keep
+ /// that designation even if their operands are modified to no longer
+ /// refer to function-local IR.
+ 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;
- /// isNullValue - Return true if this is the value that would be returned by
- /// getNullValue. This always returns false because getNullValue will never
- /// produce metadata.
- virtual bool isNullValue() const {
- return false;
- }
+ // destroy - Delete this node. Only when there are no uses.
+ void destroy();
/// Profile - calculate a unique identifier for this MDNode to collapse
/// duplicates
void Profile(FoldingSetNodeID &ID) const;
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
- llvm_unreachable("This should never be called because MDNodes have no ops");
- }
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const MDNode *) { return true; }
static bool classof(const Value *V) {
return V->getValueID() == MDNodeVal;
}
-};
-
-//===----------------------------------------------------------------------===//
-/// WeakMetadataVH - a weak value handle for metadata.
-class WeakMetadataVH : public WeakVH {
-public:
- WeakMetadataVH() : WeakVH() {}
- WeakMetadataVH(MetadataBase *M) : WeakVH(M) {}
- WeakMetadataVH(const WeakMetadataVH &RHS) : WeakVH(RHS) {}
-
- operator Value*() const {
- llvm_unreachable("WeakMetadataVH only handles Metadata");
+private:
+ bool isNotUniqued() const {
+ return (getSubclassDataFromValue() & NotUniquedBit) != 0;
}
-
- operator MetadataBase*() const {
- return cast<MetadataBase>(getValPtr());
+ void setIsNotUniqued();
+
+ // Shadow Value::setValueSubclassData with a private forwarding method so that
+ // any future subclasses cannot accidentally use it.
+ void setValueSubclassData(unsigned short D) {
+ Value::setValueSubclassData(D);
}
};
//===----------------------------------------------------------------------===//
-/// NamedMDNode - a tuple of other metadata.
-/// NamedMDNode is always named. All NamedMDNode element has a type of metadata.
-template<typename ValueSubClass, typename ItemParentClass>
- class SymbolTableListTraits;
-
-class NamedMDNode : public MetadataBase, public ilist_node<NamedMDNode> {
+/// NamedMDNode - a tuple of MDNodes.
+/// NamedMDNode is always named. All NamedMDNode operand has a type of metadata.
+class NamedMDNode : public Value, public ilist_node<NamedMDNode> {
friend class SymbolTableListTraits<NamedMDNode, Module>;
- NamedMDNode(const NamedMDNode &); // DO NOT IMPLEMENT
-
+ friend struct ilist_traits<NamedMDNode>;
friend class LLVMContextImpl;
+ NamedMDNode(const NamedMDNode &); // DO NOT IMPLEMENT
+ std::string Name;
Module *Parent;
- StringRef Name;
- SmallVector<WeakMetadataVH, 4> Node;
- typedef SmallVectorImpl<WeakMetadataVH>::iterator elem_iterator;
+ void *Operands; // SmallVector<WeakVH<MDNode>, 4>
+ void setParent(Module *M) { Parent = M; }
protected:
- explicit NamedMDNode(const char *N, unsigned NameLength,
- MetadataBase*const* Vals, unsigned NumVals,
- Module *M = 0);
+ explicit NamedMDNode(LLVMContext &C, const Twine &N, MDNode*const *Vals,
+ unsigned NumVals, Module *M = 0);
public:
- static NamedMDNode *Create(const char *N, unsigned NamedLength,
- MetadataBase*const*MDs, unsigned NumMDs,
- Module *M = 0) {
- return new NamedMDNode(N, NamedLength, MDs, NumMDs, M);
+ static NamedMDNode *Create(LLVMContext &C, const Twine &N,
+ MDNode *const *MDs,
+ unsigned NumMDs, Module *M = 0) {
+ return new NamedMDNode(C, N, MDs, NumMDs, M);
}
- typedef SmallVectorImpl<WeakMetadataVH>::const_iterator const_elem_iterator;
+ static NamedMDNode *Create(const NamedMDNode *NMD, Module *M = 0);
- StringRef getName() const { return Name; }
+ /// eraseFromParent - Drop all references and remove the node from parent
+ /// module.
+ void eraseFromParent();
+
+ /// dropAllReferences - Remove all uses and clear node vector.
+ void dropAllReferences();
+
+ /// ~NamedMDNode - Destroy NamedMDNode.
+ ~NamedMDNode();
/// getParent - Get the module that holds this named metadata collection.
inline Module *getParent() { return Parent; }
inline const Module *getParent() const { return Parent; }
- void setParent(Module *M) { Parent = M; }
-
- Value *getElement(unsigned i) const {
- return Node[i];
- }
-
- unsigned getNumElements() const {
- return Node.size();
- }
-
- bool elem_empty() const {
- return Node.empty();
- }
-
- const_elem_iterator elem_begin() const {
- return Node.begin();
- }
- const_elem_iterator elem_end() const {
- return Node.end();
- }
-
- /// getType() specialization - Type is always MetadataTy.
- ///
- inline const Type *getType() const {
- return Type::MetadataTy;
- }
+ /// getOperand - Return specified operand.
+ MDNode *getOperand(unsigned i) const;
+
+ /// getNumOperands - Return the number of NamedMDNode operands.
+ unsigned getNumOperands() const;
- /// isNullValue - Return true if this is the value that would be returned by
- /// getNullValue. This always returns false because getNullValue will never
- /// produce metadata.
- virtual bool isNullValue() const {
- return false;
- }
+ /// addOperand - Add metadata operand.
+ void addOperand(MDNode *M);
- /// Profile - calculate a unique identifier for this MDNode to collapse
- /// duplicates
- void Profile(FoldingSetNodeID &ID) const;
+ /// setName - Set the name of this named metadata.
+ void setName(const Twine &NewName);
- virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
- llvm_unreachable(
- "This should never be called because NamedMDNodes have no ops");
- }
+ /// 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; }
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