606 lines
24 KiB
C++
606 lines
24 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 is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// @file
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/// Module.h 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/GlobalAlias.h"
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#include "llvm/Metadata.h"
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#include "llvm/ADT/OwningPtr.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 FunctionType;
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class GVMaterializer;
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class LLVMContext;
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class StructType;
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template<typename T> struct DenseMapInfo;
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template<typename KeyT, typename ValueT, typename KeyInfoT> class DenseMap;
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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 get hold of the node that marks the end of the
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// list... (same trick used here as in ilist_traits<Instruction>)
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Function *createSentinel() const {
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return static_cast<Function*>(&Sentinel);
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}
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static void destroySentinel(Function*) {}
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Function *provideInitialHead() const { return createSentinel(); }
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Function *ensureHead(Function*) const { return createSentinel(); }
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static void noteHead(Function*, Function*) {}
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private:
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mutable ilist_node<Function> Sentinel;
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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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GlobalVariable *createSentinel() const {
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return static_cast<GlobalVariable*>(&Sentinel);
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}
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static void destroySentinel(GlobalVariable*) {}
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GlobalVariable *provideInitialHead() const { return createSentinel(); }
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GlobalVariable *ensureHead(GlobalVariable*) const { return createSentinel(); }
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static void noteHead(GlobalVariable*, GlobalVariable*) {}
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private:
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mutable ilist_node<GlobalVariable> Sentinel;
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};
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template<> struct ilist_traits<GlobalAlias>
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: public SymbolTableListTraits<GlobalAlias, Module> {
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// createSentinel is used to create a node that marks the end of the list.
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GlobalAlias *createSentinel() const {
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return static_cast<GlobalAlias*>(&Sentinel);
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}
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static void destroySentinel(GlobalAlias*) {}
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GlobalAlias *provideInitialHead() const { return createSentinel(); }
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GlobalAlias *ensureHead(GlobalAlias*) const { return createSentinel(); }
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static void noteHead(GlobalAlias*, GlobalAlias*) {}
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private:
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mutable ilist_node<GlobalAlias> Sentinel;
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};
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template<> struct ilist_traits<NamedMDNode>
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: public ilist_default_traits<NamedMDNode> {
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// createSentinel is used to get hold of a node that marks the end of
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// the list...
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NamedMDNode *createSentinel() const {
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return static_cast<NamedMDNode*>(&Sentinel);
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}
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static void destroySentinel(NamedMDNode*) {}
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NamedMDNode *provideInitialHead() const { return createSentinel(); }
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NamedMDNode *ensureHead(NamedMDNode*) const { return createSentinel(); }
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static void noteHead(NamedMDNode*, NamedMDNode*) {}
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void addNodeToList(NamedMDNode *) {}
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void removeNodeFromList(NamedMDNode *) {}
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private:
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mutable ilist_node<NamedMDNode> Sentinel;
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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 aliases.
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typedef iplist<GlobalAlias> AliasListType;
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/// The type for the list of named metadata.
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typedef ilist<NamedMDNode> NamedMDListType;
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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 Global Alias iterators.
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typedef AliasListType::iterator alias_iterator;
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/// The Global Alias constant iterator
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typedef AliasListType::const_iterator const_alias_iterator;
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/// The named metadata iterators.
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typedef NamedMDListType::iterator named_metadata_iterator;
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/// The named metadata constant interators.
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typedef NamedMDListType::const_iterator const_named_metadata_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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/// An enumeration for the supported behaviors of module flags. The following
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/// module flags behavior values are supported:
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///
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/// Value Behavior
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/// ----- --------
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/// 1 Error
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/// Emits an error if two values disagree.
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///
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/// 2 Warning
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/// Emits a warning if two values disagree.
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///
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/// 3 Require
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/// Emits an error when the specified value is not present
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/// or doesn't have the specified value. It is an error for
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/// two (or more) llvm.module.flags with the same ID to have
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/// the Require behavior but different values. There may be
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/// multiple Require flags per ID.
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///
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/// 4 Override
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/// Uses the specified value if the two values disagree. It
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/// is an error for two (or more) llvm.module.flags with the
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/// same ID to have the Override behavior but different
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/// values.
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enum ModFlagBehavior { Error = 1, Warning = 2, Require = 3, Override = 4 };
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struct ModuleFlagEntry {
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ModFlagBehavior Behavior;
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MDString *Key;
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Value *Val;
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ModuleFlagEntry(ModFlagBehavior B, MDString *K, Value *V)
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: Behavior(B), Key(K), Val(V) {}
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};
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/// @}
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/// @name Member Variables
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/// @{
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private:
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LLVMContext &Context; ///< The LLVMContext from which types and
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///< constants are allocated.
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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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AliasListType AliasList; ///< The Aliases in the module
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LibraryListType LibraryList; ///< The Libraries needed by the module
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NamedMDListType NamedMDList; ///< The named metadata in 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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OwningPtr<GVMaterializer> Materializer; ///< Used to materialize GlobalValues
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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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void *NamedMDSymTab; ///< NamedMDNode names.
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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(StringRef ModuleID, LLVMContext& C);
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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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/// 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 the global data context.
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/// @returns LLVMContext - a container for LLVM's global information
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LLVMContext &getContext() const { return Context; }
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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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/// Set the module identifier.
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void setModuleIdentifier(StringRef ID) { ModuleID = ID; }
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/// Set the data layout
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void setDataLayout(StringRef DL) { DataLayout = DL; }
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/// Set the target triple.
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void setTargetTriple(StringRef T) { TargetTriple = T; }
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/// Set the module-scope inline assembly blocks.
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void setModuleInlineAsm(StringRef Asm) {
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GlobalScopeAsm = Asm;
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if (!GlobalScopeAsm.empty() &&
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GlobalScopeAsm[GlobalScopeAsm.size()-1] != '\n')
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GlobalScopeAsm += '\n';
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}
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/// Append to the module-scope inline assembly blocks, automatically inserting
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/// a separating newline if necessary.
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void appendModuleInlineAsm(StringRef Asm) {
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GlobalScopeAsm += Asm;
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if (!GlobalScopeAsm.empty() &&
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GlobalScopeAsm[GlobalScopeAsm.size()-1] != '\n')
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GlobalScopeAsm += '\n';
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}
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/// @}
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/// @name Generic Value Accessors
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/// @{
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/// getNamedValue - Return the global value in the module with
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/// the specified name, of arbitrary type. This method returns null
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/// if a global with the specified name is not found.
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GlobalValue *getNamedValue(StringRef Name) const;
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/// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
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/// This ID is uniqued across modules in the current LLVMContext.
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unsigned getMDKindID(StringRef Name) const;
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/// getMDKindNames - Populate client supplied SmallVector with the name for
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/// custom metadata IDs registered in this LLVMContext.
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void getMDKindNames(SmallVectorImpl<StringRef> &Result) const;
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typedef DenseMap<StructType*, unsigned, DenseMapInfo<StructType*> >
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NumeredTypesMapTy;
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/// getTypeByName - Return the type with the specified name, or null if there
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/// is none by that name.
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StructType *getTypeByName(StringRef Name) const;
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/// @}
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/// @name Function Accessors
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/// @{
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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 a local 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(StringRef Name, FunctionType *T,
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AttrListPtr AttributeList);
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Constant *getOrInsertFunction(StringRef Name, 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 takes a
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/// null terminated list of function arguments, which makes it easier for
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/// clients to use.
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Constant *getOrInsertFunction(StringRef Name,
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AttrListPtr AttributeList,
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Type *RetTy, ...) END_WITH_NULL;
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/// getOrInsertFunction - Same as above, but without the attributes.
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Constant *getOrInsertFunction(StringRef Name, Type *RetTy, ...)
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END_WITH_NULL;
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Constant *getOrInsertTargetIntrinsic(StringRef Name,
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FunctionType *Ty,
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AttrListPtr AttributeList);
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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(StringRef Name) const;
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/// @}
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/// @name Global Variable Accessors
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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. If AllowInternal is set
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/// to true, this function will return types that have InternalLinkage. By
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/// default, these types are not returned.
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GlobalVariable *getGlobalVariable(StringRef Name,
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bool AllowInternal = false) const;
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/// getNamedGlobal - Return the 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(StringRef Name) const {
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return getGlobalVariable(Name, true);
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}
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/// getOrInsertGlobal - Look up the specified global in the module symbol
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/// table.
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/// 1. If it does not exist, add a declaration of the global and return it.
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/// 2. Else, the global exists but has the wrong type: return the function
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/// with a constantexpr cast to the right type.
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/// 3. Finally, if the existing global is the correct declaration, return
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/// the existing global.
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Constant *getOrInsertGlobal(StringRef Name, Type *Ty);
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/// @}
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/// @name Global Alias Accessors
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/// @{
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/// getNamedAlias - Return the global alias 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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GlobalAlias *getNamedAlias(StringRef Name) const;
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/// @}
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/// @name Named Metadata Accessors
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/// @{
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/// getNamedMetadata - Return the NamedMDNode in the module with the
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/// specified name. This method returns null if a NamedMDNode with the
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/// specified name is not found.
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NamedMDNode *getNamedMetadata(const Twine &Name) const;
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/// getOrInsertNamedMetadata - Return the named MDNode in the module
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/// with the specified name. This method returns a new NamedMDNode if a
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/// NamedMDNode with the specified name is not found.
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NamedMDNode *getOrInsertNamedMetadata(StringRef Name);
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/// eraseNamedMetadata - Remove the given NamedMDNode from this module
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/// and delete it.
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void eraseNamedMetadata(NamedMDNode *NMD);
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/// @}
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/// @name Module Flags Accessors
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/// @{
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/// getModuleFlagsMetadata - Returns the module flags in the provided vector.
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void getModuleFlagsMetadata(SmallVectorImpl<ModuleFlagEntry> &Flags) const;
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/// getModuleFlagsMetadata - Returns the NamedMDNode in the module that
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/// represents module-level flags. This method returns null if there are no
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/// module-level flags.
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NamedMDNode *getModuleFlagsMetadata() const;
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/// getOrInsertModuleFlagsMetadata - Returns the NamedMDNode in the module
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/// that represents module-level flags. If module-level flags aren't found,
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/// it creates the named metadata that contains them.
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NamedMDNode *getOrInsertModuleFlagsMetadata();
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/// addModuleFlag - Add a module-level flag to the module-level flags
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/// metadata. It will create the module-level flags named metadata if it
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/// doesn't already exist.
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void addModuleFlag(ModFlagBehavior Behavior, StringRef Key, Value *Val);
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void addModuleFlag(ModFlagBehavior Behavior, StringRef Key, uint32_t Val);
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void addModuleFlag(MDNode *Node);
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/// @}
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/// @name Materialization
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/// @{
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/// setMaterializer - Sets the GVMaterializer to GVM. This module must not
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/// yet have a Materializer. To reset the materializer for a module that
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/// already has one, call MaterializeAllPermanently first. Destroying this
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/// module will destroy its materializer without materializing any more
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/// GlobalValues. Without destroying the Module, there is no way to detach or
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/// destroy a materializer without materializing all the GVs it controls, to
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/// avoid leaving orphan unmaterialized GVs.
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void setMaterializer(GVMaterializer *GVM);
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/// getMaterializer - Retrieves the GVMaterializer, if any, for this Module.
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GVMaterializer *getMaterializer() const { return Materializer.get(); }
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/// isMaterializable - True if the definition of GV has yet to be materialized
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/// from the GVMaterializer.
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bool isMaterializable(const GlobalValue *GV) const;
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/// isDematerializable - Returns true if this GV was loaded from this Module's
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/// GVMaterializer and the GVMaterializer knows how to dematerialize the GV.
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bool isDematerializable(const GlobalValue *GV) const;
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/// Materialize - Make sure the GlobalValue is fully read. If the module is
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/// corrupt, this returns true and fills in the optional string with
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/// information about the problem. If successful, this returns false.
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bool Materialize(GlobalValue *GV, std::string *ErrInfo = 0);
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/// Dematerialize - If the GlobalValue is read in, and if the GVMaterializer
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/// supports it, release the memory for the function, and set it up to be
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/// materialized lazily. If !isDematerializable(), this method is a noop.
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void Dematerialize(GlobalValue *GV);
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/// MaterializeAll - Make sure all GlobalValues in this Module are fully read.
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/// If the module is corrupt, this returns true and fills in the optional
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/// string with information about the problem. If successful, this returns
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/// false.
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bool MaterializeAll(std::string *ErrInfo = 0);
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/// MaterializeAllPermanently - Make sure all GlobalValues in this Module are
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/// fully read and clear the Materializer. If the module is corrupt, this
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/// returns true, fills in the optional string with information about the
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/// problem, and DOES NOT clear the old Materializer. If successful, this
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/// returns false.
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bool MaterializeAllPermanently(std::string *ErrInfo = 0);
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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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/// 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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static iplist<GlobalVariable> Module::*getSublistAccess(GlobalVariable*) {
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return &Module::GlobalList;
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}
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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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static iplist<Function> Module::*getSublistAccess(Function*) {
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return &Module::FunctionList;
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}
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/// Get the Module's list of aliases (constant).
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const AliasListType &getAliasList() const { return AliasList; }
|
|
/// Get the Module's list of aliases.
|
|
AliasListType &getAliasList() { return AliasList; }
|
|
static iplist<GlobalAlias> Module::*getSublistAccess(GlobalAlias*) {
|
|
return &Module::AliasList;
|
|
}
|
|
/// Get the Module's list of named metadata (constant).
|
|
const NamedMDListType &getNamedMDList() const { return NamedMDList; }
|
|
/// Get the Module's list of named metadata.
|
|
NamedMDListType &getNamedMDList() { return NamedMDList; }
|
|
static ilist<NamedMDNode> Module::*getSublistAccess(NamedMDNode*) {
|
|
return &Module::NamedMDList;
|
|
}
|
|
/// Get the symbol table of global variable and function identifiers
|
|
const ValueSymbolTable &getValueSymbolTable() const { return *ValSymTab; }
|
|
/// Get the Module's symbol table of global variable and function identifiers.
|
|
ValueSymbolTable &getValueSymbolTable() { return *ValSymTab; }
|
|
|
|
/// @}
|
|
/// @name Global Variable Iteration
|
|
/// @{
|
|
|
|
global_iterator global_begin() { return GlobalList.begin(); }
|
|
const_global_iterator global_begin() const { return GlobalList.begin(); }
|
|
global_iterator global_end () { return GlobalList.end(); }
|
|
const_global_iterator global_end () const { return GlobalList.end(); }
|
|
bool global_empty() const { return GlobalList.empty(); }
|
|
|
|
/// @}
|
|
/// @name Function Iteration
|
|
/// @{
|
|
|
|
iterator begin() { return FunctionList.begin(); }
|
|
const_iterator begin() const { return FunctionList.begin(); }
|
|
iterator end () { return FunctionList.end(); }
|
|
const_iterator end () const { return FunctionList.end(); }
|
|
size_t size() const { return FunctionList.size(); }
|
|
bool empty() const { return FunctionList.empty(); }
|
|
|
|
/// @}
|
|
/// @name Dependent Library Iteration
|
|
/// @{
|
|
|
|
/// @brief Get a constant iterator to beginning of dependent library list.
|
|
inline lib_iterator lib_begin() const { return LibraryList.begin(); }
|
|
/// @brief Get a constant iterator to end of dependent library list.
|
|
inline lib_iterator lib_end() const { return LibraryList.end(); }
|
|
/// @brief Returns the number of items in the list of libraries.
|
|
inline size_t lib_size() const { return LibraryList.size(); }
|
|
/// @brief Add a library to the list of dependent libraries
|
|
void addLibrary(StringRef Lib);
|
|
/// @brief Remove a library from the list of dependent libraries
|
|
void removeLibrary(StringRef Lib);
|
|
/// @brief Get all the libraries
|
|
inline const LibraryListType& getLibraries() const { return LibraryList; }
|
|
|
|
/// @}
|
|
/// @name Alias Iteration
|
|
/// @{
|
|
|
|
alias_iterator alias_begin() { return AliasList.begin(); }
|
|
const_alias_iterator alias_begin() const { return AliasList.begin(); }
|
|
alias_iterator alias_end () { return AliasList.end(); }
|
|
const_alias_iterator alias_end () const { return AliasList.end(); }
|
|
size_t alias_size () const { return AliasList.size(); }
|
|
bool alias_empty() const { return AliasList.empty(); }
|
|
|
|
|
|
/// @}
|
|
/// @name Named Metadata Iteration
|
|
/// @{
|
|
|
|
named_metadata_iterator named_metadata_begin() { return NamedMDList.begin(); }
|
|
const_named_metadata_iterator named_metadata_begin() const {
|
|
return NamedMDList.begin();
|
|
}
|
|
|
|
named_metadata_iterator named_metadata_end() { return NamedMDList.end(); }
|
|
const_named_metadata_iterator named_metadata_end() const {
|
|
return NamedMDList.end();
|
|
}
|
|
|
|
size_t named_metadata_size() const { return NamedMDList.size(); }
|
|
bool named_metadata_empty() const { return NamedMDList.empty(); }
|
|
|
|
|
|
/// @}
|
|
/// @name Utility functions for printing and dumping Module objects
|
|
/// @{
|
|
|
|
/// Print the module to an output stream with an optional
|
|
/// AssemblyAnnotationWriter.
|
|
void print(raw_ostream &OS, AssemblyAnnotationWriter *AAW) const;
|
|
|
|
/// Dump the module to stderr (for debugging).
|
|
void dump() const;
|
|
|
|
/// This function causes all the subinstructions to "let go" of all references
|
|
/// that they are maintaining. This allows one to 'delete' a whole class at
|
|
/// a time, even though there may be circular references... first all
|
|
/// references are dropped, and all use counts go to zero. Then everything
|
|
/// is delete'd for real. Note that no operations are valid on an object
|
|
/// that has "dropped all references", except operator delete.
|
|
void dropAllReferences();
|
|
/// @}
|
|
};
|
|
|
|
/// An raw_ostream inserter for modules.
|
|
inline raw_ostream &operator<<(raw_ostream &O, const Module &M) {
|
|
M.print(O, 0);
|
|
return O;
|
|
}
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|