Reapply r110396, with fixes to appease the Linux buildbot gods.

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

diff --git a/include/llvm/GlobalVariable.h b/include/llvm/GlobalVariable.h
index 1f9bfd4f5080fd2c003d6d71cdb92aaa76d0b8db..633e8b4dc335af68b2d1188b50c68fb21ad007ee 100644 (file)
--- a/include/llvm/GlobalVariable.h
+++ b/include/llvm/GlobalVariable.h
@@ -23,12 +23,12 @@
 #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<typename ValueSubClass, typename ItemParentClass>
   class SymbolTableListTraits;
 
@@ -51,14 +51,14 @@ 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 = "",
-                 Module *Parent = 0, bool ThreadLocal = false,
-                 unsigned AddressSpace = 0);
+                 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() {
@@ -79,6 +79,15 @@ 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!
@@ -91,18 +100,10 @@ public:
     assert(hasInitializer() && "GV doesn't have initializer!");
     return static_cast<Constant*>(Op<0>().get());
   }
-  inline void setInitializer(Constant *CPV) {
-    if (CPV == 0) {
-      if (hasInitializer()) {
-        Op<0>().set(0);
-        NumOperands = 0;
-      }
-    } else {
-      if (!hasInitializer())
-        NumOperands = 1;
-      Op<0>().set(CPV);
-    }
-  }
+  /// 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
@@ -141,7 +142,7 @@ public:
 };
 
 template <>
-struct OperandTraits<GlobalVariable> : OptionalOperandTraits<> {
+struct OperandTraits<GlobalVariable> : public OptionalOperandTraits<> {
 };
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalVariable, Value)