1 //===-- Bitcode/Writer/ValueEnumerator.h - Number values --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class gives values and types Unique ID's.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_LIB_BITCODE_WRITER_VALUEENUMERATOR_H
15 #define LLVM_LIB_BITCODE_WRITER_VALUEENUMERATOR_H
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/ADT/SmallVector.h"
19 #include "llvm/ADT/UniqueVector.h"
20 #include "llvm/IR/Attributes.h"
21 #include "llvm/IR/UseListOrder.h"
34 class LocalAsMetadata;
38 class ValueSymbolTable;
42 class ValueEnumerator {
44 typedef std::vector<Type*> TypeList;
46 // For each value, we remember its Value* and occurrence frequency.
47 typedef std::vector<std::pair<const Value*, unsigned> > ValueList;
49 UseListOrderStack UseListOrders;
52 typedef DenseMap<Type*, unsigned> TypeMapType;
56 typedef DenseMap<const Value*, unsigned> ValueMapType;
57 ValueMapType ValueMap;
60 typedef UniqueVector<const Comdat *> ComdatSetType;
61 ComdatSetType Comdats;
63 std::vector<const Metadata *> MDs;
64 SmallVector<const LocalAsMetadata *, 8> FunctionLocalMDs;
65 typedef DenseMap<const Metadata *, unsigned> MetadataMapType;
66 MetadataMapType MDValueMap;
69 bool HasGenericDebugNode;
71 typedef DenseMap<AttributeSet, unsigned> AttributeGroupMapType;
72 AttributeGroupMapType AttributeGroupMap;
73 std::vector<AttributeSet> AttributeGroups;
75 typedef DenseMap<AttributeSet, unsigned> AttributeMapType;
76 AttributeMapType AttributeMap;
77 std::vector<AttributeSet> Attribute;
79 /// GlobalBasicBlockIDs - This map memoizes the basic block ID's referenced by
80 /// the "getGlobalBasicBlockID" method.
81 mutable DenseMap<const BasicBlock*, unsigned> GlobalBasicBlockIDs;
83 typedef DenseMap<const Instruction*, unsigned> InstructionMapType;
84 InstructionMapType InstructionMap;
85 unsigned InstructionCount;
87 /// BasicBlocks - This contains all the basic blocks for the currently
88 /// incorporated function. Their reverse mapping is stored in ValueMap.
89 std::vector<const BasicBlock*> BasicBlocks;
91 /// When a function is incorporated, this is the size of the Values list
92 /// before incorporation.
93 unsigned NumModuleValues;
95 /// When a function is incorporated, this is the size of the MDValues list
96 /// before incorporation.
97 unsigned NumModuleMDs;
99 unsigned FirstFuncConstantID;
100 unsigned FirstInstID;
102 ValueEnumerator(const ValueEnumerator &) LLVM_DELETED_FUNCTION;
103 void operator=(const ValueEnumerator &) LLVM_DELETED_FUNCTION;
105 ValueEnumerator(const Module &M);
108 void print(raw_ostream &OS, const ValueMapType &Map, const char *Name) const;
109 void print(raw_ostream &OS, const MetadataMapType &Map,
110 const char *Name) const;
112 unsigned getValueID(const Value *V) const;
113 unsigned getMetadataID(const Metadata *MD) const {
114 auto ID = getMetadataOrNullID(MD);
115 assert(ID != 0 && "Metadata not in slotcalculator!");
118 unsigned getMetadataOrNullID(const Metadata *MD) const {
119 return MDValueMap.lookup(MD);
122 bool hasMDString() const { return HasMDString; }
123 bool hasMDLocation() const { return HasMDLocation; }
124 bool hasGenericDebugNode() const { return HasGenericDebugNode; }
126 unsigned getTypeID(Type *T) const {
127 TypeMapType::const_iterator I = TypeMap.find(T);
128 assert(I != TypeMap.end() && "Type not in ValueEnumerator!");
132 unsigned getInstructionID(const Instruction *I) const;
133 void setInstructionID(const Instruction *I);
135 unsigned getAttributeID(AttributeSet PAL) const {
136 if (PAL.isEmpty()) return 0; // Null maps to zero.
137 AttributeMapType::const_iterator I = AttributeMap.find(PAL);
138 assert(I != AttributeMap.end() && "Attribute not in ValueEnumerator!");
142 unsigned getAttributeGroupID(AttributeSet PAL) const {
143 if (PAL.isEmpty()) return 0; // Null maps to zero.
144 AttributeGroupMapType::const_iterator I = AttributeGroupMap.find(PAL);
145 assert(I != AttributeGroupMap.end() && "Attribute not in ValueEnumerator!");
149 /// getFunctionConstantRange - Return the range of values that corresponds to
150 /// function-local constants.
151 void getFunctionConstantRange(unsigned &Start, unsigned &End) const {
152 Start = FirstFuncConstantID;
156 const ValueList &getValues() const { return Values; }
157 const std::vector<const Metadata *> &getMDs() const { return MDs; }
158 const SmallVectorImpl<const LocalAsMetadata *> &getFunctionLocalMDs() const {
159 return FunctionLocalMDs;
161 const TypeList &getTypes() const { return Types; }
162 const std::vector<const BasicBlock*> &getBasicBlocks() const {
165 const std::vector<AttributeSet> &getAttributes() const {
168 const std::vector<AttributeSet> &getAttributeGroups() const {
169 return AttributeGroups;
172 const ComdatSetType &getComdats() const { return Comdats; }
173 unsigned getComdatID(const Comdat *C) const;
175 /// getGlobalBasicBlockID - This returns the function-specific ID for the
176 /// specified basic block. This is relatively expensive information, so it
177 /// should only be used by rare constructs such as address-of-label.
178 unsigned getGlobalBasicBlockID(const BasicBlock *BB) const;
180 /// incorporateFunction/purgeFunction - If you'd like to deal with a function,
181 /// use these two methods to get its data into the ValueEnumerator!
183 void incorporateFunction(const Function &F);
184 void purgeFunction();
187 void OptimizeConstants(unsigned CstStart, unsigned CstEnd);
189 void EnumerateMDNodeOperands(const MDNode *N);
190 void EnumerateMetadata(const Metadata *MD);
191 void EnumerateFunctionLocalMetadata(const LocalAsMetadata *Local);
192 void EnumerateNamedMDNode(const NamedMDNode *NMD);
193 void EnumerateValue(const Value *V);
194 void EnumerateType(Type *T);
195 void EnumerateOperandType(const Value *V);
196 void EnumerateAttributes(AttributeSet PAL);
198 void EnumerateValueSymbolTable(const ValueSymbolTable &ST);
199 void EnumerateNamedMetadata(const Module &M);
202 } // End llvm namespace