X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FGlobals.cpp;h=7340f1532f536c4278df179316f968437b123188;hb=719de53742167ca3f0e6b2efafb6eac18bd90452;hp=ab1118dd0b1906800ee14e2271f5d6a8f9e39503;hpb=00f23ec5c2e0f4071b9720485ae63333149ee047;p=oota-llvm.git

diff --git a/lib/VMCore/Globals.cpp b/lib/VMCore/Globals.cpp
index ab1118dd0b1..7340f1532f5 100644
--- 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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -12,9 +12,12 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Constants.h"
 #include "llvm/GlobalVariable.h"
+#include "llvm/GlobalAlias.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/Module.h"
+#include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/Support/LeakDetector.h"
 using namespace llvm;
 
@@ -76,22 +79,32 @@ void GlobalValue::destroyConstant() {
   assert(0 && "You can't GV->destroyConstant()!");
   abort();
 }
+
+/// copyAttributesFrom - copy all additional attributes (those not needed to
+/// create a GlobalValue) from the GlobalValue Src to this one.
+void GlobalValue::copyAttributesFrom(const GlobalValue *Src) {
+  setAlignment(Src->getAlignment());
+  setSection(Src->getSection());
+  setVisibility(Src->getVisibility());
+}
+
+
 //===----------------------------------------------------------------------===//
 // GlobalVariable Implementation
 //===----------------------------------------------------------------------===//
 
 GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
-                               Constant *InitVal,
-                               const std::string &Name, Module *ParentModule)
-  : GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal,
-                &Initializer, InitVal != 0, Link, Name),
-    isConstantGlobal(constant) {
+                               Constant *InitVal, const std::string &Name,
+                               Module *ParentModule, bool ThreadLocal, 
+                               unsigned AddressSpace)
+  : GlobalValue(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal,
+                OperandTraits<GlobalVariable>::op_begin(this),
+                InitVal != 0, Link, Name),
+    isConstantGlobal(constant), isThreadLocalSymbol(ThreadLocal) {
   if (InitVal) {
     assert(InitVal->getType() == Ty &&
            "Initializer should be the same type as the GlobalVariable!");
-    Initializer.init(InitVal, this);
-  } else {
-    Initializer.init(0, this);
+    Op<0>() = InitVal;
   }
 
   LeakDetector::addGarbageObject(this);
@@ -101,17 +114,17 @@ 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)
-  : GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal,
-                &Initializer, InitVal != 0, Link, Name), 
-    isConstantGlobal(constant) {
+                               Constant *InitVal, const std::string &Name,
+                               GlobalVariable *Before, bool ThreadLocal,
+                               unsigned AddressSpace)
+  : GlobalValue(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal,
+                OperandTraits<GlobalVariable>::op_begin(this),
+                InitVal != 0, Link, Name),
+    isConstantGlobal(constant), isThreadLocalSymbol(ThreadLocal) {
   if (InitVal) {
     assert(InitVal->getType() == Ty &&
            "Initializer should be the same type as the GlobalVariable!");
-    Initializer.init(InitVal, this);
-  } else {
-    Initializer.init(0, this);
+    Op<0>() = InitVal;
   }
   
   LeakDetector::addGarbageObject(this);
@@ -120,7 +133,6 @@ GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
     Before->getParent()->getGlobalList().insert(Before, this);
 }
 
-
 void GlobalVariable::setParent(Module *parent) {
   if (getParent())
     LeakDetector::addGarbageObject(this);
@@ -156,3 +168,98 @@ void GlobalVariable::replaceUsesOfWithOnConstant(Value *From, Value *To,
   // Okay, preconditions out of the way, replace the constant initializer.
   this->setOperand(0, cast<Constant>(To));
 }
+
+/// copyAttributesFrom - copy all additional attributes (those not needed to
+/// create a GlobalVariable) from the GlobalVariable Src to this one.
+void GlobalVariable::copyAttributesFrom(const GlobalValue *Src) {
+  assert(isa<GlobalVariable>(Src) && "Expected a GlobalVariable!");
+  GlobalValue::copyAttributesFrom(Src);
+  const GlobalVariable *SrcVar = cast<GlobalVariable>(Src);
+  setThreadLocal(SrcVar->isThreadLocal());
+}
+
+
+//===----------------------------------------------------------------------===//
+// GlobalAlias Implementation
+//===----------------------------------------------------------------------===//
+
+GlobalAlias::GlobalAlias(const Type *Ty, LinkageTypes Link,
+                         const std::string &Name, Constant* aliasee,
+                         Module *ParentModule)
+  : GlobalValue(Ty, Value::GlobalAliasVal, &Op<0>(), 1, Link, Name) {
+  LeakDetector::addGarbageObject(this);
+
+  if (aliasee)
+    assert(aliasee->getType() == Ty && "Alias and aliasee types should match!");
+  Op<0>() = aliasee;
+
+  if (ParentModule)
+    ParentModule->getAliasList().push_back(this);
+}
+
+void GlobalAlias::setParent(Module *parent) {
+  if (getParent())
+    LeakDetector::addGarbageObject(this);
+  Parent = parent;
+  if (getParent())
+    LeakDetector::removeGarbageObject(this);
+}
+
+void GlobalAlias::removeFromParent() {
+  getParent()->getAliasList().remove(this);
+}
+
+void GlobalAlias::eraseFromParent() {
+  getParent()->getAliasList().erase(this);
+}
+
+bool GlobalAlias::isDeclaration() const {
+  const GlobalValue* AV = getAliasedGlobal();
+  if (AV)
+    return AV->isDeclaration();
+  else
+    return false;
+}
+
+void GlobalAlias::setAliasee(Constant *Aliasee) 
+{
+  if (Aliasee)
+    assert(Aliasee->getType() == getType() &&
+           "Alias and aliasee types should match!");
+  
+  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;
+}
+
+const GlobalValue *GlobalAlias::resolveAliasedGlobal() const {
+  SmallPtrSet<const GlobalValue*, 3> Visited;
+
+  const GlobalValue *GV = getAliasedGlobal();
+  Visited.insert(GV);
+
+  while (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV)) {
+    GV = GA->getAliasedGlobal();
+
+    if (!Visited.insert(GV))
+      return NULL;
+  }
+
+  return GV;
+}