X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FGlobalVariable.h;h=303e57f99a584d6a524317c41d9c72bd31e87b65;hb=c651e4c51e11feb58e6c12fee8a8f85631269f2f;hp=c32b15c2d5a93658b5aafcf24a11910f18ba09aa;hpb=be583b914d8156b99d3da264d5adca37fee8dbc9;p=oota-llvm.git diff --git a/include/llvm/GlobalVariable.h b/include/llvm/GlobalVariable.h index c32b15c2d5a..303e57f99a5 100644 --- a/include/llvm/GlobalVariable.h +++ b/include/llvm/GlobalVariable.h @@ -1,4 +1,11 @@ -//===-- llvm/Global.h - Class to represent a global variable -----*- C++ -*--=// +//===-- llvm/GlobalVariable.h - GlobalVariable class ------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file was developed by the LLVM research group and is distributed under +// the University of Illinois Open Source License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// // // This file contains the declaration of the GlobalVariable class, which // represents a single global variable (or constant) in the VM. @@ -13,48 +20,53 @@ #ifndef LLVM_GLOBAL_VARIABLE_H #define LLVM_GLOBAL_VARIABLE_H -#include - #include "llvm/GlobalValue.h" + +namespace llvm { + class Module; class Constant; class PointerType; -template struct ilist_traits; -template class SymbolTableListTraits; +template + class SymbolTableListTraits; class GlobalVariable : public GlobalValue { - friend class SymbolTableListTraits >; + friend class SymbolTableListTraits; + void operator=(const GlobalVariable &); // Do not implement + GlobalVariable(const GlobalVariable &); // Do not implement + void setParent(Module *parent); GlobalVariable *Prev, *Next; void setNext(GlobalVariable *N) { Next = N; } void setPrev(GlobalVariable *N) { Prev = N; } - bool isConstantGlobal; // Is this a global constant? + bool isConstantGlobal : 1; // Is this a global constant? + bool isThreadLocalSymbol : 1; // Is this symbol "Thread Local"? + Use Initializer; + public: /// GlobalVariable ctor - If a parent module is specified, the global is /// automatically inserted into the end of the specified modules global list. - /// GlobalVariable(const Type *Ty, bool isConstant, LinkageTypes Linkage, - Constant *Initializer = 0, const std::string &Name = "", - Module *Parent = 0); - - // Specialize setName to handle symbol table majik... - virtual void setName(const std::string &name, SymbolTable *ST = 0); - - /// isExternal - Is this global variable lacking an initializer? If so, the - /// global variable is defined in some other translation unit, and is thus - /// externally defined here. - /// - virtual bool isExternal() const { return Operands.empty(); } + Constant *Initializer = 0, const std::string &Name = "", + Module *Parent = 0, bool ThreadLocal = false); + /// GlobalVariable ctor - This creates a global and inserts it before the + /// specified other global. + GlobalVariable(const Type *Ty, bool isConstant, LinkageTypes Linkage, + Constant *Initializer, const std::string &Name, + GlobalVariable *InsertBefore, bool ThreadLocal = false); + + /// isDeclaration - Is this global variable lacking an initializer? If so, + /// the global variable is defined in some other translation unit, and is thus + /// only a declaration here. + virtual bool isDeclaration() const { return getNumOperands() == 0; } /// hasInitializer - Unless a global variable isExternal(), it has an /// initializer. The initializer for the global variable/constant is held by - /// Operands[0] if an initializer is specified. + /// Initializer if an initializer is specified. /// - inline bool hasInitializer() const { return !isExternal(); } + inline bool hasInitializer() const { return !isDeclaration(); } /// getInitializer - Return the initializer for this global variable. It is /// illegal to call this method if the global is external, because we cannot @@ -62,41 +74,66 @@ public: /// inline Constant *getInitializer() const { assert(hasInitializer() && "GV doesn't have initializer!"); - return (Constant*)Operands[0].get(); + return reinterpret_cast(Initializer.get()); } inline Constant *getInitializer() { assert(hasInitializer() && "GV doesn't have initializer!"); - return (Constant*)Operands[0].get(); + return reinterpret_cast(Initializer.get()); } inline void setInitializer(Constant *CPV) { if (CPV == 0) { - if (hasInitializer()) Operands.pop_back(); + if (hasInitializer()) { + Initializer.set(0); + NumOperands = 0; + } } else { - if (!hasInitializer()) Operands.push_back(Use(0, this)); - Operands[0] = (Value*)CPV; + if (!hasInitializer()) + NumOperands = 1; + Initializer.set(CPV); } } - // getNext/Prev - Return the next or previous global variable in the list. - GlobalVariable *getNext() { return Next; } - const GlobalVariable *getNext() const { return Next; } - GlobalVariable *getPrev() { return Prev; } - const GlobalVariable *getPrev() const { return Prev; } - /// If the value is a global constant, its value is immutable throughout the /// runtime execution of the program. Assigning a value into the constant /// leads to undefined behavior. /// bool isConstant() const { return isConstantGlobal; } void setConstant(bool Value) { isConstantGlobal = Value; } - + + /// If the value is "Thread Local", its value isn't shared by the threads. + bool isThreadLocal() const { return isThreadLocalSymbol; } + void setThreadLocal(bool Value) { isThreadLocalSymbol = Value; } + + /// removeFromParent - This method unlinks 'this' from the containing module, + /// but does not delete it. + /// + virtual void removeFromParent(); + + /// eraseFromParent - This method unlinks 'this' from the containing module + /// and deletes it. + /// + virtual void eraseFromParent(); + + /// Override Constant's implementation of this method so we can + /// replace constant initializers. + virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U); + virtual void print(std::ostream &OS) const; + void print(std::ostream *OS) const { if (OS) print(*OS); } // Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const GlobalVariable *) { return true; } static inline bool classof(const Value *V) { - return V->getValueType() == Value::GlobalVariableVal; + return V->getValueID() == Value::GlobalVariableVal; } +private: + // getNext/Prev - Return the next or previous global variable in the list. + GlobalVariable *getNext() { return Next; } + const GlobalVariable *getNext() const { return Next; } + GlobalVariable *getPrev() { return Prev; } + const GlobalVariable *getPrev() const { return Prev; } }; +} // End llvm namespace + #endif