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[oota-llvm.git] / lib / VMCore / Globals.cpp

diff --git a/lib/VMCore/Globals.cpp b/lib/VMCore/Globals.cpp
index 88a8c0b2a7ad7d4484456cfc524735a6d282321b..dae22e48aea1294ed49da7c65de9f02c93ab20ac 100644 (file)
--- a/lib/VMCore/Globals.cpp
+++ b/lib/VMCore/Globals.cpp
@@ -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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -12,6 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Constants.h"
 #include "llvm/GlobalVariable.h"
 #include "llvm/GlobalAlias.h"
 #include "llvm/DerivedTypes.h"
@@ -84,8 +85,9 @@ void GlobalValue::destroyConstant() {
 
 GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
                                Constant *InitVal, const std::string &Name,
-                               Module *ParentModule, bool ThreadLocal)
-  : GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal,
+                               Module *ParentModule, bool ThreadLocal, 
+                               unsigned AddressSpace)
+  : GlobalValue(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal,
                 &Initializer, InitVal != 0, Link, Name),
     isConstantGlobal(constant), isThreadLocalSymbol(ThreadLocal) {
   if (InitVal) {
@@ -104,8 +106,9 @@ GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
 
 GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
                                Constant *InitVal, const std::string &Name,
-                               GlobalVariable *Before, bool ThreadLocal)
-  : GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal,
+                               GlobalVariable *Before, bool ThreadLocal,
+                               unsigned AddressSpace)
+  : GlobalValue(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal,
                 &Initializer, InitVal != 0, Link, Name), 
     isConstantGlobal(constant), isThreadLocalSymbol(ThreadLocal) {
   if (InitVal) {
@@ -193,16 +196,37 @@ void GlobalAlias::eraseFromParent() {
 }
 
 bool GlobalAlias::isDeclaration() const {
-  const GlobalValue* AV = dyn_cast_or_null<const GlobalValue>(getAliasee());
-  return (AV && AV->isDeclaration());
+  const GlobalValue* AV = getAliasedGlobal();
+  if (AV)
+    return AV->isDeclaration();
+  else
+    return false;
 }
 
 void GlobalAlias::setAliasee(Constant *Aliasee) 
 {
-  if (Aliasee) {
-    assert(Aliasee->getType() == getType() && 
+  if (Aliasee)
+    assert(Aliasee->getType() == getType() &&
            "Alias and aliasee types should match!");
-    setOperand(0, Aliasee);
+  
+  setOperand(0, Aliasee);
+}
+
+const GlobalValue *GlobalAlias::getAliasedGlobal() const {
+  const Constant *C = getAliasee();
+  if (C) {
+    if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
+      return GV;
+    else {
+      const ConstantExpr *CE = 0;
+      if ((CE = dyn_cast<ConstantExpr>(C)) &&
+          (CE->getOpcode() == Instruction::BitCast || 
+           CE->getOpcode() == Instruction::GetElementPtr))
+        return dyn_cast<GlobalValue>(CE->getOperand(0));
+      else
+        assert(0 && "Unsupported aliasee");
+    }
   }
+  return 0;
 }