-//===-- 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.
#define LLVM_GLOBAL_VARIABLE_H
#include "llvm/GlobalValue.h"
+
+namespace llvm {
+
class Module;
class Constant;
class PointerType;
-template<typename SC> struct ilist_traits;
-template<typename ValueSubClass, typename ItemParentClass, typename SymTabClass,
- typename SubClass> class SymbolTableListTraits;
+template<typename ValueSubClass, typename ItemParentClass>
+ class SymbolTableListTraits;
class GlobalVariable : public GlobalValue {
- friend class SymbolTableListTraits<GlobalVariable, Module, Module,
- ilist_traits<GlobalVariable> >;
+ friend class SymbolTableListTraits<GlobalVariable, Module>;
+ 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, bool isInternal,
- 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(); }
+ GlobalVariable(const Type *Ty, bool isConstant, LinkageTypes Linkage,
+ 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
///
inline Constant *getInitializer() const {
assert(hasInitializer() && "GV doesn't have initializer!");
- return (Constant*)Operands[0].get();
+ return reinterpret_cast<Constant*>(Initializer.get());
}
inline Constant *getInitializer() {
assert(hasInitializer() && "GV doesn't have initializer!");
- return (Constant*)Operands[0].get();
+ return reinterpret_cast<Constant*>(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.
+ ///
+ void removeFromParent();
+
+ /// eraseFromParent - This method unlinks 'this' from the containing module
+ /// and deletes it.
+ ///
+ 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
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