//
// 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.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#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;
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, bool ThreadLocal)
- : GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal,
- &Initializer, InitVal != 0, Link, 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);
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,
- &Initializer, InitVal != 0, Link, 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);
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, &Aliasee, 1, Link, Name) {
+ : GlobalValue(Ty, Value::GlobalAliasVal, &Op<0>(), 1, Link, Name) {
LeakDetector::addGarbageObject(this);
if (aliasee)
assert(aliasee->getType() == Ty && "Alias and aliasee types should match!");
- Aliasee.init(aliasee, this);
+ Op<0>() = aliasee;
if (ParentModule)
ParentModule->getAliasList().push_back(this);
}
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;
}
+const GlobalValue *GlobalAlias::resolveAliasedGlobal(bool stopOnWeak) const {
+ SmallPtrSet<const GlobalValue*, 3> Visited;
+
+ // Check if we need to stop early.
+ if (stopOnWeak && hasWeakLinkage())
+ return this;
+
+ const GlobalValue *GV = getAliasedGlobal();
+ Visited.insert(GV);
+
+ // Iterate over aliasing chain, stopping on weak alias if necessary.
+ while (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV)) {
+ if (stopOnWeak && GA->hasWeakLinkage())
+ break;
+
+ GV = GA->getAliasedGlobal();
+
+ if (!Visited.insert(GV))
+ return NULL;
+ }
+
+ return GV;
+}