#include "llvm/GlobalVariable.h"
#include "llvm/GlobalAlias.h"
#include "llvm/DerivedTypes.h"
-#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/Support/ErrorHandling.h"
// GlobalValue Class
//===----------------------------------------------------------------------===//
-/// removeDeadUsersOfConstant - If the specified constantexpr is dead, remove
-/// it. This involves recursively eliminating any dead users of the
-/// constantexpr.
-static bool removeDeadUsersOfConstant(const Constant *C) {
- if (isa<GlobalValue>(C)) return false; // Cannot remove this
-
- while (!C->use_empty()) {
- const Constant *User = dyn_cast<Constant>(C->use_back());
- if (!User) return false; // Non-constant usage;
- if (!removeDeadUsersOfConstant(User))
- return false; // Constant wasn't dead
- }
-
- const_cast<Constant*>(C)->destroyConstant();
- return true;
+bool GlobalValue::isMaterializable() const {
+ return getParent() && getParent()->isMaterializable(this);
}
-
-/// removeDeadConstantUsers - If there are any dead constant users dangling
-/// off of this global value, remove them. This method is useful for clients
-/// 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() const {
- Value::use_const_iterator I = use_begin(), E = use_end();
- Value::use_const_iterator LastNonDeadUser = E;
- while (I != E) {
- if (const 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) {
- I = use_begin();
- if (I == E) break;
- } else {
- I = LastNonDeadUser;
- ++I;
- }
- }
- } else {
- LastNonDeadUser = I;
- ++I;
- }
- }
+bool GlobalValue::isDematerializable() const {
+ return getParent() && getParent()->isDematerializable(this);
+}
+bool GlobalValue::Materialize(std::string *ErrInfo) {
+ return getParent()->Materialize(this, ErrInfo);
+}
+void GlobalValue::Dematerialize() {
+ getParent()->Dematerialize(this);
}
/// Override destroyConstant to make sure it doesn't get called on
setAlignment(Src->getAlignment());
setSection(Src->getSection());
setVisibility(Src->getVisibility());
+ setUnnamedAddr(Src->hasUnnamedAddr());
+}
+
+void GlobalValue::setAlignment(unsigned Align) {
+ assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
+ assert(Align <= MaximumAlignment &&
+ "Alignment is greater than MaximumAlignment!");
+ Alignment = Log2_32(Align) + 1;
+ assert(getAlignment() == Align && "Alignment representation error!");
}
+bool GlobalValue::isDeclaration() const {
+ // Globals are definitions if they have an initializer.
+ if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(this))
+ return GV->getNumOperands() == 0;
+ // Functions are definitions if they have a body.
+ if (const Function *F = dyn_cast<Function>(this))
+ return F->empty();
+
+ // Aliases are always definitions.
+ assert(isa<GlobalAlias>(this));
+ return false;
+}
+
//===----------------------------------------------------------------------===//
// GlobalVariable Implementation
//===----------------------------------------------------------------------===//
-GlobalVariable::GlobalVariable(LLVMContext &Context, const Type *Ty,
- bool constant, LinkageTypes Link,
+GlobalVariable::GlobalVariable(Type *Ty, bool constant, LinkageTypes Link,
Constant *InitVal, const Twine &Name,
bool ThreadLocal, unsigned AddressSpace)
- : GlobalValue(Context.getPointerType(Ty, AddressSpace),
+ : GlobalValue(PointerType::get(Ty, AddressSpace),
Value::GlobalVariableVal,
OperandTraits<GlobalVariable>::op_begin(this),
InitVal != 0, Link, Name),
LeakDetector::addGarbageObject(this);
}
-GlobalVariable::GlobalVariable(Module &M, const Type *Ty, bool constant,
+GlobalVariable::GlobalVariable(Module &M, Type *Ty, bool constant,
LinkageTypes Link, Constant *InitVal,
const Twine &Name,
GlobalVariable *Before, bool ThreadLocal,
unsigned AddressSpace)
- : GlobalValue(M.getContext().getPointerType(Ty, AddressSpace),
+ : GlobalValue(PointerType::get(Ty, AddressSpace),
Value::GlobalVariableVal,
OperandTraits<GlobalVariable>::op_begin(this),
InitVal != 0, Link, Name),
this->setOperand(0, cast<Constant>(To));
}
+void GlobalVariable::setInitializer(Constant *InitVal) {
+ if (InitVal == 0) {
+ if (hasInitializer()) {
+ Op<0>().set(0);
+ NumOperands = 0;
+ }
+ } else {
+ assert(InitVal->getType() == getType()->getElementType() &&
+ "Initializer type must match GlobalVariable type");
+ if (!hasInitializer())
+ NumOperands = 1;
+ Op<0>().set(InitVal);
+ }
+}
+
/// 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) {
// GlobalAlias Implementation
//===----------------------------------------------------------------------===//
-GlobalAlias::GlobalAlias(const Type *Ty, LinkageTypes Link,
- const std::string &Name, Constant* aliasee,
+GlobalAlias::GlobalAlias(Type *Ty, LinkageTypes Link,
+ const Twine &Name, Constant* aliasee,
Module *ParentModule)
: GlobalValue(Ty, Value::GlobalAliasVal, &Op<0>(), 1, Link, Name) {
LeakDetector::addGarbageObject(this);
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!");
+void GlobalAlias::setAliasee(Constant *Aliasee) {
+ assert((!Aliasee || 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
- llvm_unreachable("Unsupported aliasee");
- }
- }
- return 0;
+ if (C == 0) return 0;
+
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
+ return GV;
+
+ const ConstantExpr *CE = cast<ConstantExpr>(C);
+ assert((CE->getOpcode() == Instruction::BitCast ||
+ CE->getOpcode() == Instruction::GetElementPtr) &&
+ "Unsupported aliasee");
+
+ return cast<GlobalValue>(CE->getOperand(0));
}
const GlobalValue *GlobalAlias::resolveAliasedGlobal(bool stopOnWeak) const {
GV = GA->getAliasedGlobal();
if (!Visited.insert(GV))
- return NULL;
+ return 0;
}
return GV;
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