X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FGlobalVariable.h;h=633e8b4dc335af68b2d1188b50c68fb21ad007ee;hb=90c579de5a383cee278acc3f7e7b9d0a656e6a35;hp=00d4acb66daf53d5886cc5af540a8bfa74f4f59e;hpb=a80e1181b78183dc36ec6568559d38faa86981f0;p=oota-llvm.git diff --git a/include/llvm/GlobalVariable.h b/include/llvm/GlobalVariable.h index 00d4acb66da..633e8b4dc33 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. // //===----------------------------------------------------------------------===// // @@ -21,42 +21,53 @@ #define LLVM_GLOBAL_VARIABLE_H #include "llvm/GlobalValue.h" +#include "llvm/OperandTraits.h" +#include "llvm/ADT/ilist_node.h" +#include "llvm/ADT/Twine.h" namespace llvm { class Module; class Constant; -class PointerType; template class SymbolTableListTraits; -class GlobalVariable : public GlobalValue { +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 : 1; // Is this a global constant? bool isThreadLocalSymbol : 1; // Is this symbol "Thread Local"? - Use Initializer; 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, - Constant *Initializer = 0, const std::string &Name = "", - Module *Parent = 0, bool ThreadLocal = false); + Constant *Initializer = 0, const Twine &Name = "", + bool ThreadLocal = false, unsigned AddressSpace = 0); /// 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); - + GlobalVariable(Module &M, const Type *Ty, bool isConstant, + LinkageTypes Linkage, Constant *Initializer, + const Twine &Name, + GlobalVariable *InsertBefore = 0, bool ThreadLocal = false, + unsigned AddressSpace = 0); + + ~GlobalVariable() { + NumOperands = 1; // FIXME: needed by operator delete + } + + /// 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. @@ -68,72 +79,74 @@ public: /// 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()); - } - inline void setInitializer(Constant *CPV) { - if (CPV == 0) { - if (hasInitializer()) { - Initializer.set(0); - NumOperands = 0; - } - } else { - if (!hasInitializer()) - NumOperands = 1; - Initializer.set(CPV); - } + return static_cast(Op<0>().get()); } + /// setInitializer - Sets the initializer for this global variable, removing + /// any existing initializer if InitVal==NULL. If this GV has type T*, the + /// initializer must have type T. + void setInitializer(Constant *InitVal); /// 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 Value) { isThreadLocalSymbol = Value; } + 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; - 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->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; } }; +template <> +struct OperandTraits : public OptionalOperandTraits<> { +}; + +DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalVariable, Value) + } // End llvm namespace #endif