allow a virtual register to be associated with live-in values.

[oota-llvm.git] / include / llvm / GlobalVariable.h

diff --git a/include/llvm/GlobalVariable.h b/include/llvm/GlobalVariable.h
index b98edd7e0d50c65e7068f9ca5fff5f32c315a996..db7a5200e2cd23fb6696de18369372021a3a10c0 100644 (file)
--- a/include/llvm/GlobalVariable.h
+++ b/include/llvm/GlobalVariable.h
@@ -1,10 +1,10 @@
 //===-- 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
@@ -41,26 +41,25 @@ class GlobalVariable : public GlobalValue {
   void setPrev(GlobalVariable *N) { Prev = N; }
 
   bool isConstantGlobal;               // Is this a global constant?
+  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 = "",
+                 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(); }
+  virtual bool isExternal() 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(); }
 
@@ -70,18 +69,22 @@ public:
   ///
   inline Constant *getInitializer() const {
     assert(hasInitializer() && "GV doesn't have initializer!");
-    return reinterpret_cast<Constant*>(Operands[0].get());
+    return reinterpret_cast<Constant*>(Initializer.get());
   }
   inline Constant *getInitializer() {
     assert(hasInitializer() && "GV doesn't have initializer!");
-    return reinterpret_cast<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] = reinterpret_cast<Value*>(CPV);
+      if (!hasInitializer())
+        NumOperands = 1;
+      Initializer.set(CPV);
     }
   }
 
@@ -97,7 +100,22 @@ public:
   ///
   bool isConstant() const { return isConstantGlobal; }
   void setConstant(bool Value) { isConstantGlobal = 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,
+                                           bool DisableChecking = false);
+
   virtual void print(std::ostream &OS) const;
 
   // Methods for support type inquiry through isa, cast, and dyn_cast: