X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FGlobalVariable.h;h=28eaa624e9d2b2e710cce9d0f0568748712b5696;hb=b4cfd15d9901883cfb46ac3826e0a27573089372;hp=87df5d514fdb549fb5bc33cd37747d28e1439d28;hpb=c5f24a2c2a16681f7816ac053c8f46a2692a3b7a;p=oota-llvm.git diff --git a/include/llvm/GlobalVariable.h b/include/llvm/GlobalVariable.h index 87df5d514fd..28eaa624e9d 100644 --- a/include/llvm/GlobalVariable.h +++ b/include/llvm/GlobalVariable.h @@ -2,8 +2,8 @@ // // 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 is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // @@ -21,112 +21,141 @@ #define LLVM_GLOBAL_VARIABLE_H #include "llvm/GlobalValue.h" +#include "llvm/OperandTraits.h" +#include "llvm/ADT/ilist_node.h" namespace llvm { class Module; class Constant; -class PointerType; -template struct ilist_traits; -template class SymbolTableListTraits; - -class GlobalVariable : public GlobalValue { - friend class SymbolTableListTraits >; +class LLVMContext; +template + class SymbolTableListTraits; + +class GlobalVariable : public GlobalValue, public ilist_node { + friend class SymbolTableListTraits; + void *operator new(size_t, unsigned); // Do not implement 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? - Use Initializer; + bool isConstantGlobal : 1; // Is this a global constant? + bool isThreadLocalSymbol : 1; // Is this symbol "Thread Local"? public: + // allocate space for exactly one operand + void *operator new(size_t s) { + return User::operator new(s, 1); + } /// 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, + GlobalVariable(LLVMContext &Context, const Type *Ty, bool isConstant, + LinkageTypes Linkage, Constant *Initializer = 0, const std::string &Name = "", - Module *Parent = 0); + bool ThreadLocal = false, unsigned AddressSpace = 0); + /// GlobalVariable ctor - This creates a global and inserts it before the + /// specified other global. + GlobalVariable(Module &M, const Type *Ty, bool isConstant, + LinkageTypes Linkage, Constant *Initializer, + const std::string &Name, + GlobalVariable *InsertBefore = 0, bool ThreadLocal = false, + unsigned AddressSpace = 0); + + ~GlobalVariable() { + NumOperands = 1; // FIXME: needed by operator delete + } - /// 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 getNumOperands() == 0; } + /// Provide fast operand accessors + DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value); + + /// 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 /// Initializer if an initializer is specified. /// - inline bool hasInitializer() const { return !isExternal(); } + inline bool hasInitializer() const { return !isDeclaration(); } + + /// hasDefinitiveInitializer - Whether the global variable has an initializer, + /// and this is the initializer that will be used in the final executable. + inline bool hasDefinitiveInitializer() const { + return hasInitializer() && + // The initializer of a global variable with weak linkage may change at + // link time. + !mayBeOverridden(); + } /// getInitializer - Return the initializer for this global variable. It is /// illegal to call this method if the global is external, because we cannot /// tell what the value is initialized to! /// - inline Constant *getInitializer() const { + inline /*const FIXME*/ Constant *getInitializer() const { assert(hasInitializer() && "GV doesn't have initializer!"); - return reinterpret_cast(Initializer.get()); + return static_cast(Op<0>().get()); } inline Constant *getInitializer() { assert(hasInitializer() && "GV doesn't have initializer!"); - return reinterpret_cast(Initializer.get()); + return static_cast(Op<0>().get()); } inline void setInitializer(Constant *CPV) { if (CPV == 0) { if (hasInitializer()) { - Initializer.set(0); + Op<0>().set(0); NumOperands = 0; } } else { if (!hasInitializer()) NumOperands = 1; - Initializer.set(CPV); + Op<0>().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; } + void setConstant(bool Val) { isConstantGlobal = Val; } + + /// If the value is "Thread Local", its value isn't shared by the threads. + bool isThreadLocal() const { return isThreadLocalSymbol; } + void setThreadLocal(bool Val) { isThreadLocalSymbol = Val; } + + /// copyAttributesFrom - copy all additional attributes (those not needed to + /// create a GlobalVariable) from the GlobalVariable Src to this one. + void copyAttributesFrom(const GlobalValue *Src); /// removeFromParent - This method unlinks 'this' from the containing module, /// but does not delete it. /// - void removeFromParent(); + virtual void removeFromParent(); /// eraseFromParent - This method unlinks 'this' from the containing module /// and deletes it. /// - void eraseFromParent(); + 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; - // 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; } }; +template <> +struct OperandTraits : OptionalOperandTraits<> { +}; + +DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalVariable, Value) + } // End llvm namespace #endif