diff options
Diffstat (limited to 'lib/IR/Globals.cpp')
| -rw-r--r-- | lib/IR/Globals.cpp | 155 |
1 files changed, 79 insertions, 76 deletions
diff --git a/lib/IR/Globals.cpp b/lib/IR/Globals.cpp index f338dd7..c905cfe 100644 --- a/lib/IR/Globals.cpp +++ b/lib/IR/Globals.cpp @@ -53,23 +53,41 @@ void GlobalValue::destroyConstant() { /// 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()); setUnnamedAddr(Src->hasUnnamedAddr()); setDLLStorageClass(Src->getDLLStorageClass()); } -void GlobalValue::setAlignment(unsigned Align) { - assert((!isa<GlobalAlias>(this) || !Align) && - "GlobalAlias should not have an alignment!"); +unsigned GlobalValue::getAlignment() const { + if (auto *GA = dyn_cast<GlobalAlias>(this)) + return GA->getAliasee()->getAlignment(); + + return cast<GlobalObject>(this)->getAlignment(); +} + +void GlobalObject::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; + setGlobalValueSubClassData(Log2_32(Align) + 1); assert(getAlignment() == Align && "Alignment representation error!"); } +void GlobalObject::copyAttributesFrom(const GlobalValue *Src) { + const auto *GV = cast<GlobalObject>(Src); + GlobalValue::copyAttributesFrom(GV); + setAlignment(GV->getAlignment()); + setSection(GV->getSection()); +} + +const std::string &GlobalValue::getSection() const { + if (auto *GA = dyn_cast<GlobalAlias>(this)) + return GA->getAliasee()->getSection(); + return cast<GlobalObject>(this)->getSection(); +} + +void GlobalObject::setSection(StringRef S) { Section = S; } + bool GlobalValue::isDeclaration() const { // Globals are definitions if they have an initializer. if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(this)) @@ -83,22 +101,20 @@ bool GlobalValue::isDeclaration() const { assert(isa<GlobalAlias>(this)); return false; } - + //===----------------------------------------------------------------------===// // GlobalVariable Implementation //===----------------------------------------------------------------------===// GlobalVariable::GlobalVariable(Type *Ty, bool constant, LinkageTypes Link, - Constant *InitVal, - const Twine &Name, ThreadLocalMode TLMode, - unsigned AddressSpace, + Constant *InitVal, const Twine &Name, + ThreadLocalMode TLMode, unsigned AddressSpace, bool isExternallyInitialized) - : GlobalValue(PointerType::get(Ty, AddressSpace), - Value::GlobalVariableVal, - OperandTraits<GlobalVariable>::op_begin(this), - InitVal != 0, Link, Name), - isConstantGlobal(constant), threadLocalMode(TLMode), - isExternallyInitializedConstant(isExternallyInitialized) { + : GlobalObject(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal, + OperandTraits<GlobalVariable>::op_begin(this), + InitVal != nullptr, Link, Name), + isConstantGlobal(constant), threadLocalMode(TLMode), + isExternallyInitializedConstant(isExternallyInitialized) { if (InitVal) { assert(InitVal->getType() == Ty && "Initializer should be the same type as the GlobalVariable!"); @@ -110,24 +126,22 @@ GlobalVariable::GlobalVariable(Type *Ty, bool constant, LinkageTypes Link, GlobalVariable::GlobalVariable(Module &M, Type *Ty, bool constant, LinkageTypes Link, Constant *InitVal, - const Twine &Name, - GlobalVariable *Before, ThreadLocalMode TLMode, - unsigned AddressSpace, + const Twine &Name, GlobalVariable *Before, + ThreadLocalMode TLMode, unsigned AddressSpace, bool isExternallyInitialized) - : GlobalValue(PointerType::get(Ty, AddressSpace), - Value::GlobalVariableVal, - OperandTraits<GlobalVariable>::op_begin(this), - InitVal != 0, Link, Name), - isConstantGlobal(constant), threadLocalMode(TLMode), - isExternallyInitializedConstant(isExternallyInitialized) { + : GlobalObject(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal, + OperandTraits<GlobalVariable>::op_begin(this), + InitVal != nullptr, Link, Name), + isConstantGlobal(constant), threadLocalMode(TLMode), + isExternallyInitializedConstant(isExternallyInitialized) { if (InitVal) { assert(InitVal->getType() == Ty && "Initializer should be the same type as the GlobalVariable!"); Op<0>() = InitVal; } - + LeakDetector::addGarbageObject(this); - + if (Before) Before->getParent()->getGlobalList().insert(Before, this); else @@ -171,9 +185,9 @@ void GlobalVariable::replaceUsesOfWithOnConstant(Value *From, Value *To, } void GlobalVariable::setInitializer(Constant *InitVal) { - if (InitVal == 0) { + if (!InitVal) { if (hasInitializer()) { - Op<0>().set(0); + Op<0>().set(nullptr); NumOperands = 0; } } else { @@ -189,7 +203,7 @@ void GlobalVariable::setInitializer(Constant *InitVal) { /// 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); + GlobalObject::copyAttributesFrom(Src); const GlobalVariable *SrcVar = cast<GlobalVariable>(Src); setThreadLocalMode(SrcVar->getThreadLocalMode()); } @@ -199,20 +213,47 @@ void GlobalVariable::copyAttributesFrom(const GlobalValue *Src) { // GlobalAlias Implementation //===----------------------------------------------------------------------===// -GlobalAlias::GlobalAlias(Type *Ty, LinkageTypes Link, - const Twine &Name, Constant* aliasee, +GlobalAlias::GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Link, + const Twine &Name, GlobalObject *Aliasee, Module *ParentModule) - : GlobalValue(Ty, Value::GlobalAliasVal, &Op<0>(), 1, Link, Name) { + : GlobalValue(PointerType::get(Ty, AddressSpace), 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; + Op<0>() = Aliasee; if (ParentModule) ParentModule->getAliasList().push_back(this); } +GlobalAlias *GlobalAlias::create(Type *Ty, unsigned AddressSpace, + LinkageTypes Link, const Twine &Name, + GlobalObject *Aliasee, Module *ParentModule) { + return new GlobalAlias(Ty, AddressSpace, Link, Name, Aliasee, ParentModule); +} + +GlobalAlias *GlobalAlias::create(Type *Ty, unsigned AddressSpace, + LinkageTypes Linkage, const Twine &Name, + Module *Parent) { + return create(Ty, AddressSpace, Linkage, Name, nullptr, Parent); +} + +GlobalAlias *GlobalAlias::create(Type *Ty, unsigned AddressSpace, + LinkageTypes Linkage, const Twine &Name, + GlobalObject *Aliasee) { + return create(Ty, AddressSpace, Linkage, Name, Aliasee, Aliasee->getParent()); +} + +GlobalAlias *GlobalAlias::create(LinkageTypes Link, const Twine &Name, + GlobalObject *Aliasee) { + PointerType *PTy = Aliasee->getType(); + return create(PTy->getElementType(), PTy->getAddressSpace(), Link, Name, + Aliasee); +} + +GlobalAlias *GlobalAlias::create(const Twine &Name, GlobalObject *Aliasee) { + return create(Aliasee->getLinkage(), Name, Aliasee); +} + void GlobalAlias::setParent(Module *parent) { if (getParent()) LeakDetector::addGarbageObject(this); @@ -229,42 +270,4 @@ void GlobalAlias::eraseFromParent() { getParent()->getAliasList().erase(this); } -void GlobalAlias::setAliasee(Constant *Aliasee) { - assert((!Aliasee || Aliasee->getType() == getType()) && - "Alias and aliasee types should match!"); - - setOperand(0, Aliasee); -} - -static GlobalValue *getAliaseeGV(GlobalAlias *GA) { - Constant *C = GA->getAliasee(); - assert(C && "Must alias something"); - - if (GlobalValue *GV = dyn_cast<GlobalValue>(C)) - return GV; - - ConstantExpr *CE = cast<ConstantExpr>(C); - assert((CE->getOpcode() == Instruction::BitCast || - CE->getOpcode() == Instruction::AddrSpaceCast || - CE->getOpcode() == Instruction::GetElementPtr) && - "Unsupported aliasee"); - - return cast<GlobalValue>(CE->getOperand(0)); -} - -GlobalValue *GlobalAlias::getAliasedGlobal() { - SmallPtrSet<GlobalValue*, 3> Visited; - - GlobalAlias *GA = this; - - for (;;) { - GlobalValue *GV = getAliaseeGV(GA); - if (!Visited.insert(GV)) - return 0; - - // Iterate over aliasing chain. - GA = dyn_cast<GlobalAlias>(GV); - if (!GA) - return GV; - } -} +void GlobalAlias::setAliasee(GlobalObject *Aliasee) { setOperand(0, Aliasee); } |