X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMetadata.h;h=a6c3f039a11ec41802f5da0590c0421692b06571;hb=f78081145695baa5d0b004e674c4561245b13b52;hp=f64978cab44a05fe156190f94c2dc577e3bce614;hpb=6cead7879aa8902905809e3853d31093a5511c2f;p=oota-llvm.git diff --git a/include/llvm/Metadata.h b/include/llvm/Metadata.h index f64978cab44..a6c3f039a11 100644 --- a/include/llvm/Metadata.h +++ b/include/llvm/Metadata.h @@ -30,37 +30,22 @@ template class SymbolTableListTraits; -//===----------------------------------------------------------------------===// -// MetadataBase - A base class for MDNode and MDString. -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; - } -}; - //===----------------------------------------------------------------------===// /// 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; -protected: explicit MDString(LLVMContext &C, StringRef S); 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(); } @@ -87,10 +72,11 @@ class MDNodeOperand; //===----------------------------------------------------------------------===// /// 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. @@ -104,7 +90,7 @@ class MDNode : public MetadataBase, public FoldingSetNode { 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 @@ -119,16 +105,16 @@ class MDNode : public MetadataBase, public FoldingSetNode { FL_Yes = 1 }; - // Replace each instance of F from the operand list of this node with T. + /// 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); + MDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals, + bool isFunctionLocal); static MDNode *getMDNode(LLVMContext &C, Value *const *Vals, unsigned NumVals, - FunctionLocalness FL); + FunctionLocalness FL, bool Insert = true); public: // Constructors and destructors. static MDNode *get(LLVMContext &Context, Value *const *Vals, @@ -137,6 +123,19 @@ public: // 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); + + /// getTemporary - Return a temporary MDNode, for use in constructing + /// cyclic MDNode structures. A temporary MDNode is not uniqued, + /// may be RAUW'd, and must be manually deleted with deleteTemporary. + static MDNode *getTemporary(LLVMContext &Context, Value *const *Vals, + unsigned NumVals); + + /// deleteTemporary - Deallocate a node created by getTemporary. The + /// node must not have any users. + static void deleteTemporary(MDNode *N); /// getOperand - Return specified operand. Value *getOperand(unsigned i) const; @@ -145,9 +144,6 @@ public: 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; } @@ -156,10 +152,7 @@ public: // 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. - Function *getFunction() const; - - // destroy - Delete this node. Only when there are no uses. - void destroy(); + const Function *getFunction() const; /// Profile - calculate a unique identifier for this MDNode to collapse /// duplicates @@ -171,12 +164,13 @@ public: return V->getValueID() == MDNodeVal; } private: + // 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. @@ -186,31 +180,25 @@ private: }; //===----------------------------------------------------------------------===// -/// 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 - a tuple of MDNodes. Despite its name, a NamedMDNode isn't +/// itself an MDNode. NamedMDNodes belong to modules, have names, and contain +/// lists of MDNodes. +class NamedMDNode : public ilist_node { friend class SymbolTableListTraits; friend struct ilist_traits; friend class LLVMContextImpl; + friend class Module; NamedMDNode(const NamedMDNode &); // DO NOT IMPLEMENT std::string Name; Module *Parent; - void *Operands; // SmallVector, 4> + void *Operands; // SmallVector, 4> void setParent(Module *M) { Parent = M; } -protected: - explicit NamedMDNode(LLVMContext &C, const Twine &N, MDNode*const *Vals, - unsigned NumVals, Module *M = 0); -public: - static NamedMDNode *Create(LLVMContext &C, const Twine &N, - MDNode *const *MDs, - unsigned NumMDs, Module *M = 0) { - return new NamedMDNode(C, N, MDs, NumMDs, M); - } - static NamedMDNode *Create(const NamedMDNode *NMD, Module *M = 0); + explicit NamedMDNode(const Twine &N); +public: /// eraseFromParent - Drop all references and remove the node from parent /// module. void eraseFromParent(); @@ -234,17 +222,11 @@ public: /// addOperand - Add metadata operand. 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) { - return V->getValueID() == NamedMDNodeVal; - } + /// print - Implement operator<< on NamedMDNode. + void print(raw_ostream &ROS, AssemblyAnnotationWriter *AAW = 0) const; }; } // end llvm namespace