X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;ds=sidebyside;f=include%2Fllvm%2FGlobalVariable.h;h=00d4acb66daf53d5886cc5af540a8bfa74f4f59e;hb=a727d5502c8e23c090da658bf14c5ebc1169a070;hp=cce4aaceae3f32c1cea9a9607460fa06e1d2fe79;hpb=cbf0c2c3e3046e0bec800bd4628e507fbc5c214d;p=oota-llvm.git

diff --git a/include/llvm/GlobalVariable.h b/include/llvm/GlobalVariable.h
index cce4aaceae3..00d4acb66da 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.
@@ -14,56 +21,119 @@
 #define LLVM_GLOBAL_VARIABLE_H
 
 #include "llvm/GlobalValue.h"
+
+namespace llvm {
+
 class Module;
-class ConstPoolVal;
+class Constant;
 class PointerType;
+template<typename ValueSubClass, typename ItemParentClass>
+  class SymbolTableListTraits;
 
 class GlobalVariable : public GlobalValue {
-  friend class ValueHolder<GlobalVariable, Module, Module>;
-  void setParent(Module *parent) { Parent = parent; }
+  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 : 1;           // Is this a global constant?
+  bool isThreadLocalSymbol : 1;        // Is this symbol "Thread Local"?
+  Use Initializer;
 
-  bool Constant;                   // Is this a global constant?
 public:
-  GlobalVariable(const Type *Ty, bool isConstant, ConstPoolVal *Initializer = 0,
-		 const string &Name = "");
-  ~GlobalVariable() {}
-
-  // Specialize setName to handle symbol table majik...
-  virtual void setName(const string &name, SymbolTable *ST = 0);
-
-  // The initializer for the global variable/constant is held by Operands[0] if
-  // an initializer is specified.
-  //
-  inline bool hasInitializer() const { return !Operands.empty(); }
-  inline ConstPoolVal *getInitializer() const {
+  /// 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);
+  /// 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
+  /// Initializer if an initializer is specified.
+  ///
+  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
+  /// tell what the value is initialized to!
+  ///
+  inline Constant *getInitializer() const {
     assert(hasInitializer() && "GV doesn't have initializer!");
-    return (ConstPoolVal*)Operands[0].get();
+    return reinterpret_cast<Constant*>(Initializer.get());
   }
-  inline ConstPoolVal *getInitializer() {
+  inline Constant *getInitializer() {
     assert(hasInitializer() && "GV doesn't have initializer!");
-    return (ConstPoolVal*)Operands[0].get();
+    return reinterpret_cast<Constant*>(Initializer.get());
   }
-  inline void setInitializer(ConstPoolVal *CPV) {
+  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);
     }
   }
 
+  /// 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; }
 
-  // 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.
-  //
-  inline bool isConstant() const { return Constant; }
+  /// 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