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f8dfef7437
object is always constant. As such, evaluate it at compile time instead of storing it as an ivar in SymbolTableListTraits. This shrinks every SymbolTableListTraits ilist by a word, shrinking BasicBlock from 44->40 bytes, Function from 96->88 bytes, and Module from 60->52 bytes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36189 91177308-0d34-0410-b5e6-96231b3b80d8
358 lines
14 KiB
C++
358 lines
14 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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/// @file This file contains the declarations for the Module class.
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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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#include "llvm/Support/DataTypes.h"
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#include <vector>
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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 FunctionType;
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template<> struct ilist_traits<Function>
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: public SymbolTableListTraits<Function, Module> {
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// createSentinel is used to create a node that marks the end of the list.
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static Function *createSentinel();
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static void destroySentinel(Function *F) { delete F; }
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static iplist<Function> &getList(Module *M);
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static inline ValueSymbolTable *getSymTab(Module *M);
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static int getListOffset();
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};
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template<> struct ilist_traits<GlobalVariable>
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: public SymbolTableListTraits<GlobalVariable, Module> {
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// createSentinel is used to create a node that marks the end of the list.
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static GlobalVariable *createSentinel();
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static void destroySentinel(GlobalVariable *GV) { delete GV; }
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static iplist<GlobalVariable> &getList(Module *M);
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static inline ValueSymbolTable *getSymTab(Module *M);
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static int getListOffset();
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};
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/// A Module instance is used to store all the information related to an
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/// LLVM module. Modules are the top level container of all other LLVM
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/// Intermediate Representation (IR) objects. Each module directly contains a
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/// list of globals variables, a list of functions, a list of libraries (or
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/// other modules) this module depends on, a symbol table, and various data
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/// about the target's characteristics.
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///
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/// A module 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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/// @brief The main container class for the LLVM Intermediate Representation.
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class Module {
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/// @name Types And Enumerations
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/// @{
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public:
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/// The type for the list of global variables.
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typedef iplist<GlobalVariable> GlobalListType;
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/// The type for the list of functions.
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typedef iplist<Function> FunctionListType;
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/// The type for the list of dependent libraries.
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typedef std::vector<std::string> LibraryListType;
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/// The Global Variable iterator.
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typedef GlobalListType::iterator global_iterator;
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/// The Global Variable constant iterator.
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typedef GlobalListType::const_iterator const_global_iterator;
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/// The Function iterators.
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typedef FunctionListType::iterator iterator;
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/// The Function constant iterator
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typedef FunctionListType::const_iterator const_iterator;
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/// The Library list iterator.
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typedef LibraryListType::const_iterator lib_iterator;
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/// An enumeration for describing the endianess of the target machine.
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enum Endianness { AnyEndianness, LittleEndian, BigEndian };
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/// An enumeration for describing the size of a pointer on the target machine.
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enum PointerSize { AnyPointerSize, Pointer32, Pointer64 };
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/// @}
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/// @name Member Variables
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/// @{
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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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LibraryListType LibraryList; ///< The Libraries needed by the module
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std::string GlobalScopeAsm; ///< Inline Asm at global scope.
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ValueSymbolTable *ValSymTab; ///< Symbol table for values
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TypeSymbolTable *TypeSymTab; ///< Symbol table for types
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std::string ModuleID; ///< Human readable identifier for the module
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std::string TargetTriple; ///< Platform target triple Module compiled on
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std::string DataLayout; ///< Target data description
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friend class Constant;
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/// @}
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/// @name Constructors
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/// @{
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public:
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/// The Module constructor. Note that there is no default constructor. You
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/// must provide a name for the module upon construction.
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explicit Module(const std::string &ModuleID);
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/// The module destructor. This will dropAllReferences.
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~Module();
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/// @}
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/// @name Module Level Accessors
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/// @{
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public:
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/// Get the module identifier which is, essentially, the name of the module.
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/// @returns the module identifier as a string
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const std::string &getModuleIdentifier() const { return ModuleID; }
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/// Get the data layout string for the module's target platform. This encodes
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/// the type sizes and alignments expected by this module.
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/// @returns the data layout as a string
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const std::string& getDataLayout() const { return DataLayout; }
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/// Get the target triple which is a string describing the target host.
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/// @returns a string containing the target triple.
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const std::string &getTargetTriple() const { return TargetTriple; }
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/// Get the target endian information.
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/// @returns Endianess - an enumeration for the endianess of the target
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Endianness getEndianness() const;
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/// Get the target pointer size.
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/// @returns PointerSize - an enumeration for the size of the target's pointer
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PointerSize getPointerSize() const;
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/// Get any module-scope inline assembly blocks.
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/// @returns a string containing the module-scope inline assembly blocks.
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const std::string &getModuleInlineAsm() const { return GlobalScopeAsm; }
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/// @}
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/// @name Module Level Mutators
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/// @{
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public:
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/// Set the module identifier.
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void setModuleIdentifier(const std::string &ID) { ModuleID = ID; }
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/// Set the data layout
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void setDataLayout(const std::string& DL) { DataLayout = DL; }
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/// Set the target triple.
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void setTargetTriple(const std::string &T) { TargetTriple = T; }
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/// Set the module-scope inline assembly blocks.
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void setModuleInlineAsm(const std::string &Asm) { GlobalScopeAsm = Asm; }
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/// @}
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/// @name Function Accessors
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/// @{
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public:
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/// getOrInsertFunction - Look up the specified function in the module symbol
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/// table. Four possibilities:
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/// 1. If it does not exist, add a prototype for the function and return it.
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/// 2. If it exists, and has internal linkage, the existing function is
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/// renamed and a new one is inserted.
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/// 3. Otherwise, if the existing function has the correct prototype, return
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/// the existing function.
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/// 4. Finally, the function exists but has the wrong prototype: return the
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/// function with a constantexpr cast to the right prototype.
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Constant *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 function guarantees to return a constant of pointer to the
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/// specified function type or a ConstantExpr BitCast of that type if the
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/// named /// function has a different type. This version of the method
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/// takes a null terminated list of function arguments, which makes it
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/// easier for clients to use.
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Constant *getOrInsertFunction(const std::string &Name, const Type *RetTy,...)
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END_WITH_NULL;
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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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Function *getFunction(const std::string &Name) const;
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/// @}
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/// @name Global Variable Accessors
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/// @{
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public:
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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. The type argument
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/// should be the underlying type of the global, i.e., it should not have
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/// the top-level PointerType, which represents the address of the global.
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/// If AllowInternal is set to true, this function will return types that
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/// have InternalLinkage. By default, these types are not returned.
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GlobalVariable *getGlobalVariable(const std::string &Name,
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bool AllowInternal = false) const;
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/// getNamedGlobal - Return the first global variable in the module with the
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/// specified name, of arbitrary type. This method returns null if a global
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/// with the specified name is not found.
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GlobalVariable *getNamedGlobal(const std::string &Name) const {
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return getGlobalVariable(Name, true);
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}
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/// @}
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/// @name Type Accessors
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/// @{
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public:
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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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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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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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/// @name Direct access to the globals list, functions list, and symbol table
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/// @{
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public:
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/// Get the Module's list of global variables (constant).
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const GlobalListType &getGlobalList() const { return GlobalList; }
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/// Get the Module's list of global variables.
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GlobalListType &getGlobalList() { return GlobalList; }
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/// Get the Module's list of functions (constant).
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const FunctionListType &getFunctionList() const { return FunctionList; }
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/// Get the Module's list of functions.
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FunctionListType &getFunctionList() { return FunctionList; }
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/// Get the symbol table of global variable and function identifiers
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const ValueSymbolTable &getValueSymbolTable() const { return *ValSymTab; }
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/// Get the Module's symbol table of global variable and function identifiers.
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ValueSymbolTable &getValueSymbolTable() { return *ValSymTab; }
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/// Get the symbol table of types
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const TypeSymbolTable &getTypeSymbolTable() const { return *TypeSymTab; }
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/// Get the Module's symbol table of types
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TypeSymbolTable &getTypeSymbolTable() { return *TypeSymTab; }
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/// @}
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/// @name Global Variable Iteration
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/// @{
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public:
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/// Get an iterator to the first global variable
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global_iterator global_begin() { return GlobalList.begin(); }
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/// Get a constant iterator to the first global variable
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const_global_iterator global_begin() const { return GlobalList.begin(); }
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/// Get an iterator to the last global variable
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global_iterator global_end () { return GlobalList.end(); }
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/// Get a constant iterator to the last global variable
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const_global_iterator global_end () const { return GlobalList.end(); }
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/// Determine if the list of globals is empty.
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bool global_empty() const { return GlobalList.empty(); }
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/// @}
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/// @name Function Iteration
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/// @{
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public:
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/// Get an iterator to the first function.
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iterator begin() { return FunctionList.begin(); }
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/// Get a constant iterator to the first function.
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const_iterator begin() const { return FunctionList.begin(); }
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/// Get an iterator to the last function.
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iterator end () { return FunctionList.end(); }
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/// Get a constant iterator to the last function.
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const_iterator end () const { return FunctionList.end(); }
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/// Determine how many functions are in the Module's list of functions.
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size_t size() const { return FunctionList.size(); }
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/// Determine if the list of functions is empty.
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bool empty() const { return FunctionList.empty(); }
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/// @}
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/// @name Dependent Library Iteration
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/// @{
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public:
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/// @brief Get a constant iterator to beginning of dependent library list.
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inline lib_iterator lib_begin() const { return LibraryList.begin(); }
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/// @brief Get a constant iterator to end of dependent library list.
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inline lib_iterator lib_end() const { return LibraryList.end(); }
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/// @brief Returns the number of items in the list of libraries.
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inline size_t lib_size() const { return LibraryList.size(); }
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/// @brief Add a library to the list of dependent libraries
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void addLibrary(const std::string& Lib);
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/// @brief Remove a library from the list of dependent libraries
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void removeLibrary(const std::string& Lib);
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/// @brief Get all the libraries
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inline const LibraryListType& getLibraries() const { return LibraryList; }
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/// @}
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/// @name Utility functions for printing and dumping Module objects
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/// @{
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public:
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/// Print the module to an output stream
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void print(std::ostream &OS) const { print(OS, 0); }
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void print(std::ostream *OS) const { if (OS) print(*OS); }
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/// Print the module to an output stream with AssemblyAnnotationWriter.
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void print(std::ostream &OS, AssemblyAnnotationWriter *AAW) const;
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void print(std::ostream *OS, AssemblyAnnotationWriter *AAW) const {
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if (OS) print(*OS, AAW);
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}
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/// Dump the module to std::cerr (for debugging).
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void dump() const;
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/// This function causes all the subinstructions to "let go" of all references
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/// that they are maintaining. This allows one to 'delete' a whole class at
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/// a time, even though there may be circular references... first all
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/// references are dropped, and all use counts go to zero. Then everything
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/// is delete'd for real. Note that no operations are valid on an object
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/// that has "dropped all references", except operator delete.
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void dropAllReferences();
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/// @}
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static unsigned getFunctionListOffset() {
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Module *Obj = 0;
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return reinterpret_cast<unsigned>(&Obj->FunctionList);
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}
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static unsigned getGlobalVariableListOffset() {
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Module *Obj = 0;
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return reinterpret_cast<unsigned>(&Obj->GlobalList);
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}
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};
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/// An iostream inserter for modules.
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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 ValueSymbolTable *
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ilist_traits<Function>::getSymTab(Module *M) {
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return M ? &M->getValueSymbolTable() : 0;
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}
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inline ValueSymbolTable *
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ilist_traits<GlobalVariable>::getSymTab(Module *M) {
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return M ? &M->getValueSymbolTable() : 0;
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}
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inline int
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ilist_traits<Function>::getListOffset() {
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return Module::getFunctionListOffset();
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}
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inline int
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ilist_traits<GlobalVariable>::getListOffset() {
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return Module::getGlobalVariableListOffset();
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}
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} // End llvm namespace
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#endif
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