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 VALUE_ENUMERATOR_H
15 #define VALUE_ENUMERATOR_H
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/Attributes.h"
32 class TypeSymbolTable;
33 class ValueSymbolTable;
36 class ValueEnumerator {
38 // For each type, we remember its Type* and occurrence frequency.
39 typedef std::vector<std::pair<const Type*, unsigned> > TypeList;
41 // For each value, we remember its Value* and occurrence frequency.
42 typedef std::vector<std::pair<const Value*, unsigned> > ValueList;
44 typedef DenseMap<const Type*, unsigned> TypeMapType;
48 typedef DenseMap<const Value*, unsigned> ValueMapType;
49 ValueMapType ValueMap;
52 ValueMapType MDValueMap;
54 typedef DenseMap<void*, unsigned> AttributeMapType;
55 AttributeMapType AttributeMap;
56 std::vector<AttrListPtr> Attributes;
58 /// GlobalBasicBlockIDs - This map memoizes the basic block ID's referenced by
59 /// the "getGlobalBasicBlockID" method.
60 mutable DenseMap<const BasicBlock*, unsigned> GlobalBasicBlockIDs;
62 typedef DenseMap<const Instruction*, unsigned> InstructionMapType;
63 InstructionMapType InstructionMap;
64 unsigned InstructionCount;
66 /// BasicBlocks - This contains all the basic blocks for the currently
67 /// incorporated function. Their reverse mapping is stored in ValueMap.
68 std::vector<const BasicBlock*> BasicBlocks;
70 /// When a function is incorporated, this is the size of the Values list
71 /// before incorporation.
72 unsigned NumModuleValues;
73 unsigned FirstFuncConstantID;
76 ValueEnumerator(const ValueEnumerator &); // DO NOT IMPLEMENT
77 void operator=(const ValueEnumerator &); // DO NOT IMPLEMENT
79 ValueEnumerator(const Module *M);
81 unsigned getValueID(const Value *V) const;
83 unsigned getTypeID(const Type *T) const {
84 TypeMapType::const_iterator I = TypeMap.find(T);
85 assert(I != TypeMap.end() && "Type not in ValueEnumerator!");
89 unsigned getInstructionID(const Instruction *I) const;
90 void setInstructionID(const Instruction *I);
92 unsigned getAttributeID(const AttrListPtr &PAL) const {
93 if (PAL.isEmpty()) return 0; // Null maps to zero.
94 AttributeMapType::const_iterator I = AttributeMap.find(PAL.getRawPointer());
95 assert(I != AttributeMap.end() && "Attribute not in ValueEnumerator!");
99 /// getFunctionConstantRange - Return the range of values that corresponds to
100 /// function-local constants.
101 void getFunctionConstantRange(unsigned &Start, unsigned &End) const {
102 Start = FirstFuncConstantID;
106 const ValueList &getValues() const { return Values; }
107 const ValueList &getMDValues() const { return MDValues; }
108 const TypeList &getTypes() const { return Types; }
109 const std::vector<const BasicBlock*> &getBasicBlocks() const {
112 const std::vector<AttrListPtr> &getAttributes() const {
116 /// getGlobalBasicBlockID - This returns the function-specific ID for the
117 /// specified basic block. This is relatively expensive information, so it
118 /// should only be used by rare constructs such as address-of-label.
119 unsigned getGlobalBasicBlockID(const BasicBlock *BB) const;
121 /// incorporateFunction/purgeFunction - If you'd like to deal with a function,
122 /// use these two methods to get its data into the ValueEnumerator!
124 void incorporateFunction(const Function &F);
125 void purgeFunction();
128 void OptimizeConstants(unsigned CstStart, unsigned CstEnd);
130 void EnumerateMetadata(const MetadataBase *MD, bool isGlobal);
131 void EnumerateNamedMDNode(const NamedMDNode *NMD);
132 void EnumerateValue(const Value *V, bool isGlobal = true);
133 void EnumerateType(const Type *T);
134 void EnumerateOperandType(const Value *V, bool isGlobal);
135 void EnumerateAttributes(const AttrListPtr &PAL);
137 void EnumerateTypeSymbolTable(const TypeSymbolTable &ST);
138 void EnumerateValueSymbolTable(const ValueSymbolTable &ST);
139 void EnumerateMDSymbolTable(const MDSymbolTable &ST);
142 } // End llvm namespace