//
//===----------------------------------------------------------------------===//
+#include "llvm/Constants.h"
#include "llvm/GlobalVariable.h"
+#include "llvm/GlobalAlias.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/Support/LeakDetector.h"
/// that want to check to see if a global is unused, but don't want to deal
/// with potentially dead constants hanging off of the globals.
void GlobalValue::removeDeadConstantUsers() {
-
Value::use_iterator I = use_begin(), E = use_end();
Value::use_iterator LastNonDeadUser = E;
- for (; I != E; ++I) {
+ while (I != E) {
if (Constant *User = dyn_cast<Constant>(*I)) {
if (!removeDeadUsersOfConstant(User)) {
// If the constant wasn't dead, remember that this was the last live use
// and move on to the next constant.
LastNonDeadUser = I;
+ ++I;
} else {
// If the constant was dead, then the iterator is invalidated.
if (LastNonDeadUser == E) {
if (I == E) break;
} else {
I = LastNonDeadUser;
+ ++I;
}
}
} else {
LastNonDeadUser = I;
+ ++I;
}
}
}
assert(0 && "You can't GV->destroyConstant()!");
abort();
}
+
//===----------------------------------------------------------------------===//
// GlobalVariable Implementation
//===----------------------------------------------------------------------===//
GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
- Constant *InitVal,
- const std::string &Name, Module *ParentModule)
+ Constant *InitVal, const std::string &Name,
+ Module *ParentModule, bool ThreadLocal)
: GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal,
&Initializer, InitVal != 0, Link, Name),
- isConstantGlobal(constant) {
+ isConstantGlobal(constant), isThreadLocalSymbol(ThreadLocal) {
if (InitVal) {
assert(InitVal->getType() == Ty &&
"Initializer should be the same type as the GlobalVariable!");
}
GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
- Constant *InitVal,
- const std::string &Name, GlobalVariable *Before)
+ Constant *InitVal, const std::string &Name,
+ GlobalVariable *Before, bool ThreadLocal)
: GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal,
&Initializer, InitVal != 0, Link, Name),
- isConstantGlobal(constant) {
+ isConstantGlobal(constant), isThreadLocalSymbol(ThreadLocal) {
if (InitVal) {
assert(InitVal->getType() == Ty &&
"Initializer should be the same type as the GlobalVariable!");
Before->getParent()->getGlobalList().insert(Before, this);
}
-
void GlobalVariable::setParent(Module *parent) {
if (getParent())
LeakDetector::addGarbageObject(this);
// Okay, preconditions out of the way, replace the constant initializer.
this->setOperand(0, cast<Constant>(To));
}
+
+//===----------------------------------------------------------------------===//
+// 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) {
+ LeakDetector::addGarbageObject(this);
+
+ if (aliasee)
+ assert(aliasee->getType() == Ty && "Alias and aliasee types should match!");
+ Aliasee.init(aliasee, this);
+
+ 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;
+}
+