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250 lines
11 KiB
C++
250 lines
11 KiB
C++
//===-- llvm/Module.h - C++ class to represent a VM module ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declarations for the Module class that is used to
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// maintain all the information related to a VM module.
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//
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// A module also maintains a GlobalValRefMap object that is used to hold all
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// constant references to global variables in the module. When a global
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// variable is destroyed, it should have no entries in the GlobalValueRefMap.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MODULE_H
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#define LLVM_MODULE_H
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#include "llvm/Function.h"
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#include "llvm/GlobalVariable.h"
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namespace llvm {
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class GlobalVariable;
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class GlobalValueRefMap; // Used by ConstantVals.cpp
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class ConstantPointerRef;
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class FunctionType;
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class SymbolTable;
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template<> struct ilist_traits<Function>
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: public SymbolTableListTraits<Function, Module, Module> {
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// createNode is used to create a node that marks the end of the list...
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static Function *createNode();
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static iplist<Function> &getList(Module *M);
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};
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template<> struct ilist_traits<GlobalVariable>
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: public SymbolTableListTraits<GlobalVariable, Module, Module> {
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// createNode is used to create a node that marks the end of the list...
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static GlobalVariable *createNode();
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static iplist<GlobalVariable> &getList(Module *M);
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};
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struct Module : public Annotable {
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typedef iplist<GlobalVariable> GlobalListType;
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typedef iplist<Function> FunctionListType;
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// Global Variable iterators...
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typedef GlobalListType::iterator giterator;
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typedef GlobalListType::const_iterator const_giterator;
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typedef std::reverse_iterator<giterator> reverse_giterator;
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typedef std::reverse_iterator<const_giterator> const_reverse_giterator;
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// Function iterators...
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typedef FunctionListType::iterator iterator;
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typedef FunctionListType::const_iterator const_iterator;
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typedef std::reverse_iterator<iterator> reverse_iterator;
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typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
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enum Endianness { AnyEndianness, LittleEndian, BigEndian };
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enum PointerSize { AnyPointerSize, Pointer32, Pointer64 };
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private:
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GlobalListType GlobalList; // The Global Variables in the module
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FunctionListType FunctionList; // The Functions in the module
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GlobalValueRefMap *GVRefMap; // Keep track of GlobalValueRef's
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SymbolTable *SymTab; // Symbol Table for the module
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std::string ModuleID; // Human readable identifier for the module
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// These flags are probably not the right long-term way to handle this kind of
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// target information, but it is sufficient for now.
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Endianness Endian; // True if target is little endian
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PointerSize PtrSize; // True if target has 32-bit pointers (false = 64-bit)
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// Accessor for the underlying GVRefMap... only through the Constant class...
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friend class Constant;
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friend class ConstantPointerRef;
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void mutateConstantPointerRef(GlobalValue *OldGV, GlobalValue *NewGV);
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ConstantPointerRef *getConstantPointerRef(GlobalValue *GV);
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void destroyConstantPointerRef(ConstantPointerRef *CPR);
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public:
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Module(const std::string &ModuleID);
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~Module();
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const std::string &getModuleIdentifier() const { return ModuleID; }
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/// Target endian information...
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Endianness getEndianness() const { return Endian; }
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void setEndianness(Endianness E) { Endian = E; }
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/// Target Pointer Size information...
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PointerSize getPointerSize() const { return PtrSize; }
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void setPointerSize(PointerSize PS) { PtrSize = PS; }
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//===--------------------------------------------------------------------===//
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// Methods for easy access to the functions in the module.
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//
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/// getOrInsertFunction - Look up the specified function in the module symbol
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/// table. If it does not exist, add a prototype for the function and return
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/// it.
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Function *getOrInsertFunction(const std::string &Name, const FunctionType *T);
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/// getOrInsertFunction - Look up the specified function in the module symbol
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/// table. If it does not exist, add a prototype for the function and return
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/// it. This version of the method takes a null terminated list of function
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/// arguments, which makes it easier for clients to use.
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Function *getOrInsertFunction(const std::string &Name, const Type *RetTy,...);
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/// getFunction - Look up the specified function in the module symbol table.
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/// If it does not exist, return null.
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///
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Function *getFunction(const std::string &Name, const FunctionType *Ty);
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/// getMainFunction - This function looks up main efficiently. This is such a
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/// common case, that it is a method in Module. If main cannot be found, a
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/// null pointer is returned.
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///
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Function *getMainFunction();
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/// getNamedFunction - Return the first function in the module with the
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/// specified name, of arbitrary type. This method returns null if a function
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/// with the specified name is not found.
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///
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Function *getNamedFunction(const std::string &Name);
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//===--------------------------------------------------------------------===//
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// Methods for easy access to the global variables in the module.
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//
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/// getGlobalVariable - Look up the specified global variable in the module
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/// symbol table. If it does not exist, return null. Note that this only
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/// returns a global variable if it does not have internal linkage. The type
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/// argument should be the underlying type of the global, ie, it should not
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/// have the top-level PointerType, which represents the address of the
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/// global.
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///
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GlobalVariable *getGlobalVariable(const std::string &Name, const Type *Ty);
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//===--------------------------------------------------------------------===//
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// Methods for easy access to the types in the module.
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//
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/// addTypeName - Insert an entry in the symbol table mapping Str to Type. If
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/// there is already an entry for this name, true is returned and the symbol
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/// table is not modified.
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///
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bool addTypeName(const std::string &Name, const Type *Ty);
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/// getTypeName - If there is at least one entry in the symbol table for the
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/// specified type, return it.
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///
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std::string getTypeName(const Type *Ty) const;
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/// getTypeByName - Return the type with the specified name in this module, or
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/// null if there is none by that name.
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const Type *getTypeByName(const std::string &Name) const;
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//===--------------------------------------------------------------------===//
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// Methods for direct access to the globals list, functions list, and symbol
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// table.
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//
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/// Get the underlying elements of the Module...
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inline const GlobalListType &getGlobalList() const { return GlobalList; }
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inline GlobalListType &getGlobalList() { return GlobalList; }
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inline const FunctionListType &getFunctionList() const { return FunctionList;}
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inline FunctionListType &getFunctionList() { return FunctionList;}
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/// getSymbolTable() - Get access to the symbol table for the module, where
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/// global variables and functions are identified.
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///
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inline SymbolTable &getSymbolTable() { return *SymTab; }
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inline const SymbolTable &getSymbolTable() const { return *SymTab; }
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//===--------------------------------------------------------------------===//
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// Module iterator forwarding functions
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//
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inline giterator gbegin() { return GlobalList.begin(); }
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inline const_giterator gbegin() const { return GlobalList.begin(); }
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inline giterator gend () { return GlobalList.end(); }
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inline const_giterator gend () const { return GlobalList.end(); }
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inline reverse_giterator grbegin() { return GlobalList.rbegin(); }
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inline const_reverse_giterator grbegin() const { return GlobalList.rbegin(); }
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inline reverse_giterator grend () { return GlobalList.rend(); }
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inline const_reverse_giterator grend () const { return GlobalList.rend(); }
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inline unsigned gsize() const { return GlobalList.size(); }
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inline bool gempty() const { return GlobalList.empty(); }
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inline const GlobalVariable &gfront() const { return GlobalList.front(); }
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inline GlobalVariable &gfront() { return GlobalList.front(); }
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inline const GlobalVariable &gback() const { return GlobalList.back(); }
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inline GlobalVariable &gback() { return GlobalList.back(); }
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inline iterator begin() { return FunctionList.begin(); }
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inline const_iterator begin() const { return FunctionList.begin(); }
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inline iterator end () { return FunctionList.end(); }
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inline const_iterator end () const { return FunctionList.end(); }
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inline reverse_iterator rbegin() { return FunctionList.rbegin(); }
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inline const_reverse_iterator rbegin() const { return FunctionList.rbegin(); }
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inline reverse_iterator rend () { return FunctionList.rend(); }
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inline const_reverse_iterator rend () const { return FunctionList.rend(); }
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inline unsigned size() const { return FunctionList.size(); }
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inline bool empty() const { return FunctionList.empty(); }
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inline const Function &front() const { return FunctionList.front(); }
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inline Function &front() { return FunctionList.front(); }
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inline const Function &back() const { return FunctionList.back(); }
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inline Function &back() { return FunctionList.back(); }
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void print(std::ostream &OS) const { print(OS, 0); }
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void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
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void dump() const;
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/// dropAllReferences() - This function causes all the subinstructions to "let
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/// go" of all references that they are maintaining. This allows one to
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/// 'delete' a whole class at a time, even though there may be circular
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/// references... first all references are dropped, and all use counts go to
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/// zero. Then everything is delete'd for real. Note that no operations are
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/// valid on an object that has "dropped all references", except operator
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/// delete.
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///
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void dropAllReferences();
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};
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inline std::ostream &operator<<(std::ostream &O, const Module *M) {
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M->print(O);
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return O;
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}
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inline std::ostream &operator<<(std::ostream &O, const Module &M) {
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M.print(O);
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return O;
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}
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} // End llvm namespace
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#endif
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