1 //===-- Bitcode/Writer/ValueEnumerator.h - Number values --------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This class gives values and types Unique ID's. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef VALUE_ENUMERATOR_H 15 #define VALUE_ENUMERATOR_H 16 17 #include "llvm/ADT/DenseMap.h" 18 #include "llvm/ADT/SmallVector.h" 19 #include "llvm/Attributes.h" 20 #include <vector> 21 22 namespace llvm { 23 24 class Type; 25 class Value; 26 class Instruction; 27 class BasicBlock; 28 class Function; 29 class Module; 30 class MDNode; 31 class NamedMDNode; 32 class AttrListPtr; 33 class ValueSymbolTable; 34 class MDSymbolTable; 35 class raw_ostream; 36 37 class ValueEnumerator { 38 public: 39 typedef std::vector<Type*> TypeList; 40 41 // For each value, we remember its Value* and occurrence frequency. 42 typedef std::vector<std::pair<const Value*, unsigned> > ValueList; 43 private: 44 typedef DenseMap<Type*, unsigned> TypeMapType; 45 TypeMapType TypeMap; 46 TypeList Types; 47 48 typedef DenseMap<const Value*, unsigned> ValueMapType; 49 ValueMapType ValueMap; 50 ValueList Values; 51 ValueList MDValues; 52 SmallVector<const MDNode *, 8> FunctionLocalMDs; 53 ValueMapType MDValueMap; 54 55 typedef DenseMap<void*, unsigned> AttributeMapType; 56 AttributeMapType AttributeMap; 57 std::vector<AttrListPtr> Attributes; 58 59 /// GlobalBasicBlockIDs - This map memoizes the basic block ID's referenced by 60 /// the "getGlobalBasicBlockID" method. 61 mutable DenseMap<const BasicBlock*, unsigned> GlobalBasicBlockIDs; 62 63 typedef DenseMap<const Instruction*, unsigned> InstructionMapType; 64 InstructionMapType InstructionMap; 65 unsigned InstructionCount; 66 67 /// BasicBlocks - This contains all the basic blocks for the currently 68 /// incorporated function. Their reverse mapping is stored in ValueMap. 69 std::vector<const BasicBlock*> BasicBlocks; 70 71 /// When a function is incorporated, this is the size of the Values list 72 /// before incorporation. 73 unsigned NumModuleValues; 74 75 /// When a function is incorporated, this is the size of the MDValues list 76 /// before incorporation. 77 unsigned NumModuleMDValues; 78 79 unsigned FirstFuncConstantID; 80 unsigned FirstInstID; 81 82 ValueEnumerator(const ValueEnumerator &); // DO NOT IMPLEMENT 83 void operator=(const ValueEnumerator &); // DO NOT IMPLEMENT 84 public: 85 ValueEnumerator(const Module *M); 86 87 void dump() const; 88 void print(raw_ostream &OS, const ValueMapType &Map, const char *Name) const; 89 90 unsigned getValueID(const Value *V) const; 91 92 unsigned getTypeID(Type *T) const { 93 TypeMapType::const_iterator I = TypeMap.find(T); 94 assert(I != TypeMap.end() && "Type not in ValueEnumerator!"); 95 return I->second-1; 96 } 97 98 unsigned getInstructionID(const Instruction *I) const; 99 void setInstructionID(const Instruction *I); 100 101 unsigned getAttributeID(const AttrListPtr &PAL) const { 102 if (PAL.isEmpty()) return 0; // Null maps to zero. 103 AttributeMapType::const_iterator I = AttributeMap.find(PAL.getRawPointer()); 104 assert(I != AttributeMap.end() && "Attribute not in ValueEnumerator!"); 105 return I->second; 106 } 107 108 /// getFunctionConstantRange - Return the range of values that corresponds to 109 /// function-local constants. 110 void getFunctionConstantRange(unsigned &Start, unsigned &End) const { 111 Start = FirstFuncConstantID; 112 End = FirstInstID; 113 } 114 115 const ValueList &getValues() const { return Values; } 116 const ValueList &getMDValues() const { return MDValues; } 117 const SmallVector<const MDNode *, 8> &getFunctionLocalMDValues() const { 118 return FunctionLocalMDs; 119 } 120 const TypeList &getTypes() const { return Types; } 121 const std::vector<const BasicBlock*> &getBasicBlocks() const { 122 return BasicBlocks; 123 } 124 const std::vector<AttrListPtr> &getAttributes() const { 125 return Attributes; 126 } 127 128 /// getGlobalBasicBlockID - This returns the function-specific ID for the 129 /// specified basic block. This is relatively expensive information, so it 130 /// should only be used by rare constructs such as address-of-label. 131 unsigned getGlobalBasicBlockID(const BasicBlock *BB) const; 132 133 /// incorporateFunction/purgeFunction - If you'd like to deal with a function, 134 /// use these two methods to get its data into the ValueEnumerator! 135 /// 136 void incorporateFunction(const Function &F); 137 void purgeFunction(); 138 139 private: 140 void OptimizeConstants(unsigned CstStart, unsigned CstEnd); 141 142 void EnumerateMDNodeOperands(const MDNode *N); 143 void EnumerateMetadata(const Value *MD); 144 void EnumerateFunctionLocalMetadata(const MDNode *N); 145 void EnumerateNamedMDNode(const NamedMDNode *NMD); 146 void EnumerateValue(const Value *V); 147 void EnumerateType(Type *T); 148 void EnumerateOperandType(const Value *V); 149 void EnumerateAttributes(const AttrListPtr &PAL); 150 151 void EnumerateValueSymbolTable(const ValueSymbolTable &ST); 152 void EnumerateNamedMetadata(const Module *M); 153 }; 154 155 } // End llvm namespace 156 157 #endif 158
