X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FIR%2FGlobals.cpp;h=8fde4b8e9d77546875e1596b2884bd00ed019552;hb=75af6938b24f1fd6c2db9f52d5b1fdc3164dcfc2;hp=dd2a4e435ec2a6f378e7aaefbf346372eb69111b;hpb=ad6d7f58c7d66c8caa6be712d4e68ea5841c6045;p=oota-llvm.git diff --git a/lib/IR/Globals.cpp b/lib/IR/Globals.cpp index dd2a4e435ec..8fde4b8e9d7 100644 --- a/lib/IR/Globals.cpp +++ b/lib/IR/Globals.cpp @@ -18,8 +18,8 @@ #include "llvm/IR/DerivedTypes.h" #include "llvm/IR/GlobalAlias.h" #include "llvm/IR/GlobalVariable.h" -#include "llvm/IR/LeakDetector.h" #include "llvm/IR/Module.h" +#include "llvm/IR/Operator.h" #include "llvm/Support/ErrorHandling.h" using namespace llvm; @@ -28,26 +28,28 @@ using namespace llvm; //===----------------------------------------------------------------------===// bool GlobalValue::isMaterializable() const { - return getParent() && getParent()->isMaterializable(this); + if (const Function *F = dyn_cast(this)) + return F->isMaterializable(); + return false; } bool GlobalValue::isDematerializable() const { return getParent() && getParent()->isDematerializable(this); } -bool GlobalValue::Materialize(std::string *ErrInfo) { - return getParent()->Materialize(this, ErrInfo); +std::error_code GlobalValue::materialize() { + return getParent()->materialize(this); } -void GlobalValue::Dematerialize() { - getParent()->Dematerialize(this); +void GlobalValue::dematerialize() { + getParent()->dematerialize(this); } -const DataLayout *GlobalValue::getDataLayout() const { - return getParent()->getDataLayout(); +/// Override destroyConstantImpl to make sure it doesn't get called on +/// GlobalValue's because they shouldn't be treated like other constants. +void GlobalValue::destroyConstantImpl() { + llvm_unreachable("You can't GV->destroyConstantImpl()!"); } -/// Override destroyConstant to make sure it doesn't get called on -/// GlobalValue's because they shouldn't be treated like other constants. -void GlobalValue::destroyConstant() { - llvm_unreachable("You can't GV->destroyConstant()!"); +Value *GlobalValue::handleOperandChangeImpl(Value *From, Value *To, Use *U) { + llvm_unreachable("Unsupported class for handleOperandChange()!"); } /// copyAttributesFrom - copy all additional attributes (those not needed to @@ -59,9 +61,16 @@ void GlobalValue::copyAttributesFrom(const GlobalValue *Src) { } unsigned GlobalValue::getAlignment() const { - if (auto *GA = dyn_cast(this)) - return GA->getAliasee()->getAlignment(); - + if (auto *GA = dyn_cast(this)) { + // In general we cannot compute this at the IR level, but we try. + if (const GlobalObject *GO = GA->getBaseObject()) + return GO->getAlignment(); + + // FIXME: we should also be able to handle: + // Alias = Global + Offset + // Alias = Absolute + return 0; + } return cast(this)->getAlignment(); } @@ -69,10 +78,24 @@ 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!"); - setGlobalValueSubClassData(Log2_32(Align) + 1); + unsigned AlignmentData = Log2_32(Align) + 1; + unsigned OldData = getGlobalValueSubClassData(); + setGlobalValueSubClassData((OldData & ~AlignmentMask) | AlignmentData); assert(getAlignment() == Align && "Alignment representation error!"); } +unsigned GlobalObject::getGlobalObjectSubClassData() const { + unsigned ValueData = getGlobalValueSubClassData(); + return ValueData >> AlignmentBits; +} + +void GlobalObject::setGlobalObjectSubClassData(unsigned Val) { + unsigned OldData = getGlobalValueSubClassData(); + setGlobalValueSubClassData((OldData & AlignmentMask) | + (Val << AlignmentBits)); + assert(getGlobalObjectSubClassData() == Val && "representation error"); +} + void GlobalObject::copyAttributesFrom(const GlobalValue *Src) { const auto *GV = cast(Src); GlobalValue::copyAttributesFrom(GV); @@ -80,12 +103,26 @@ void GlobalObject::copyAttributesFrom(const GlobalValue *Src) { setSection(GV->getSection()); } -const std::string &GlobalValue::getSection() const { - if (auto *GA = dyn_cast(this)) - return GA->getAliasee()->getSection(); +const char *GlobalValue::getSection() const { + if (auto *GA = dyn_cast(this)) { + // In general we cannot compute this at the IR level, but we try. + if (const GlobalObject *GO = GA->getBaseObject()) + return GO->getSection(); + return ""; + } return cast(this)->getSection(); } +Comdat *GlobalValue::getComdat() { + if (auto *GA = dyn_cast(this)) { + // In general we cannot compute this at the IR level, but we try. + if (const GlobalObject *GO = GA->getBaseObject()) + return const_cast(GO)->getComdat(); + return nullptr; + } + return cast(this)->getComdat(); +} + void GlobalObject::setSection(StringRef S) { Section = S; } bool GlobalValue::isDeclaration() const { @@ -95,7 +132,7 @@ bool GlobalValue::isDeclaration() const { // Functions are definitions if they have a body. if (const Function *F = dyn_cast(this)) - return F->empty(); + return F->empty() && !F->isMaterializable(); // Aliases are always definitions. assert(isa(this)); @@ -110,18 +147,17 @@ GlobalVariable::GlobalVariable(Type *Ty, bool constant, LinkageTypes Link, Constant *InitVal, const Twine &Name, ThreadLocalMode TLMode, unsigned AddressSpace, bool isExternallyInitialized) - : GlobalObject(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal, + : GlobalObject(Ty, Value::GlobalVariableVal, OperandTraits::op_begin(this), - InitVal != nullptr, Link, Name), - isConstantGlobal(constant), threadLocalMode(TLMode), + InitVal != nullptr, Link, Name, AddressSpace), + isConstantGlobal(constant), isExternallyInitializedConstant(isExternallyInitialized) { + setThreadLocalMode(TLMode); if (InitVal) { assert(InitVal->getType() == Ty && "Initializer should be the same type as the GlobalVariable!"); Op<0>() = InitVal; } - - LeakDetector::addGarbageObject(this); } GlobalVariable::GlobalVariable(Module &M, Type *Ty, bool constant, @@ -129,72 +165,53 @@ GlobalVariable::GlobalVariable(Module &M, Type *Ty, bool constant, const Twine &Name, GlobalVariable *Before, ThreadLocalMode TLMode, unsigned AddressSpace, bool isExternallyInitialized) - : GlobalObject(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal, + : GlobalObject(Ty, Value::GlobalVariableVal, OperandTraits::op_begin(this), - InitVal != nullptr, Link, Name), - isConstantGlobal(constant), threadLocalMode(TLMode), + InitVal != nullptr, Link, Name, AddressSpace), + isConstantGlobal(constant), isExternallyInitializedConstant(isExternallyInitialized) { + setThreadLocalMode(TLMode); 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); + Before->getParent()->getGlobalList().insert(Before->getIterator(), this); else M.getGlobalList().push_back(this); } void GlobalVariable::setParent(Module *parent) { - if (getParent()) - LeakDetector::addGarbageObject(this); Parent = parent; - if (getParent()) - LeakDetector::removeGarbageObject(this); } void GlobalVariable::removeFromParent() { - getParent()->getGlobalList().remove(this); + getParent()->getGlobalList().remove(getIterator()); } void GlobalVariable::eraseFromParent() { - getParent()->getGlobalList().erase(this); -} - -void GlobalVariable::replaceUsesOfWithOnConstant(Value *From, Value *To, - Use *U) { - // If you call this, then you better know this GVar has a constant - // initializer worth replacing. Enforce that here. - assert(getNumOperands() == 1 && - "Attempt to replace uses of Constants on a GVar with no initializer"); - - // And, since you know it has an initializer, the From value better be - // the initializer :) - assert(getOperand(0) == From && - "Attempt to replace wrong constant initializer in GVar"); - - // And, you better have a constant for the replacement value - assert(isa(To) && - "Attempt to replace GVar initializer with non-constant"); - - // Okay, preconditions out of the way, replace the constant initializer. - this->setOperand(0, cast(To)); + getParent()->getGlobalList().erase(getIterator()); } void GlobalVariable::setInitializer(Constant *InitVal) { if (!InitVal) { if (hasInitializer()) { + // Note, the num operands is used to compute the offset of the operand, so + // the order here matters. Clearing the operand then clearing the num + // operands ensures we have the correct offset to the operand. Op<0>().set(nullptr); - NumOperands = 0; + setGlobalVariableNumOperands(0); } } else { assert(InitVal->getType() == getType()->getElementType() && "Initializer type must match GlobalVariable type"); + // Note, the num operands is used to compute the offset of the operand, so + // the order here matters. We need to set num operands to 1 first so that + // we get the correct offset to the first operand when we set it. if (!hasInitializer()) - NumOperands = 1; + setGlobalVariableNumOperands(1); Op<0>().set(InitVal); } } @@ -206,6 +223,7 @@ void GlobalVariable::copyAttributesFrom(const GlobalValue *Src) { GlobalObject::copyAttributesFrom(Src); const GlobalVariable *SrcVar = cast(Src); setThreadLocalMode(SrcVar->getThreadLocalMode()); + setExternallyInitialized(SrcVar->isExternallyInitialized()); } @@ -213,32 +231,60 @@ void GlobalVariable::copyAttributesFrom(const GlobalValue *Src) { // GlobalAlias Implementation //===----------------------------------------------------------------------===// -GlobalAlias::GlobalAlias(Type *Ty, LinkageTypes Link, const Twine &Name, - GlobalObject *Aliasee, Module *ParentModule, - unsigned AddressSpace) - : GlobalValue(PointerType::get(Ty, AddressSpace), Value::GlobalAliasVal, - &Op<0>(), 1, Link, Name) { - LeakDetector::addGarbageObject(this); +GlobalAlias::GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Link, + const Twine &Name, Constant *Aliasee, + Module *ParentModule) + : GlobalValue(Ty, Value::GlobalAliasVal, &Op<0>(), 1, Link, Name, + AddressSpace) { Op<0>() = Aliasee; if (ParentModule) ParentModule->getAliasList().push_back(this); } +GlobalAlias *GlobalAlias::create(Type *Ty, unsigned AddressSpace, + LinkageTypes Link, const Twine &Name, + Constant *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, + GlobalValue *Aliasee) { + return create(Ty, AddressSpace, Linkage, Name, Aliasee, Aliasee->getParent()); +} + +GlobalAlias *GlobalAlias::create(LinkageTypes Link, const Twine &Name, + GlobalValue *Aliasee) { + PointerType *PTy = Aliasee->getType(); + return create(PTy->getElementType(), PTy->getAddressSpace(), Link, Name, + Aliasee); +} + +GlobalAlias *GlobalAlias::create(const Twine &Name, GlobalValue *Aliasee) { + return create(Aliasee->getLinkage(), Name, Aliasee); +} + void GlobalAlias::setParent(Module *parent) { - if (getParent()) - LeakDetector::addGarbageObject(this); Parent = parent; - if (getParent()) - LeakDetector::removeGarbageObject(this); } void GlobalAlias::removeFromParent() { - getParent()->getAliasList().remove(this); + getParent()->getAliasList().remove(getIterator()); } void GlobalAlias::eraseFromParent() { - getParent()->getAliasList().erase(this); + getParent()->getAliasList().erase(getIterator()); } -void GlobalAlias::setAliasee(GlobalObject *Aliasee) { setOperand(0, Aliasee); } +void GlobalAlias::setAliasee(Constant *Aliasee) { + assert((!Aliasee || Aliasee->getType() == getType()) && + "Alias and aliasee types should match!"); + setOperand(0, Aliasee); +}