#include "llvm/IR/GlobalValue.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/IR/Constants.h"
-#include "llvm/IR/DataLayout.h"
#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;
//===----------------------------------------------------------------------===//
bool GlobalValue::isMaterializable() const {
- return getParent() && getParent()->isMaterializable(this);
+ if (const Function *F = dyn_cast<Function>(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);
}
unsigned GlobalValue::getAlignment() const {
- if (auto *GA = dyn_cast<GlobalAlias>(this))
- return GA->getAliasedGlobal()->getAlignment();
-
+ if (auto *GA = dyn_cast<GlobalAlias>(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<GlobalObject>(this)->getAlignment();
}
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<GlobalObject>(Src);
GlobalValue::copyAttributesFrom(GV);
setSection(GV->getSection());
}
-const std::string &GlobalValue::getSection() const {
- if (auto *GA = dyn_cast<GlobalAlias>(this))
- return GA->getAliasedGlobal()->getSection();
+const char *GlobalValue::getSection() const {
+ if (auto *GA = dyn_cast<GlobalAlias>(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<GlobalObject>(this)->getSection();
}
+Comdat *GlobalValue::getComdat() {
+ if (auto *GA = dyn_cast<GlobalAlias>(this)) {
+ // In general we cannot compute this at the IR level, but we try.
+ if (const GlobalObject *GO = GA->getBaseObject())
+ return const_cast<GlobalObject *>(GO)->getComdat();
+ return nullptr;
+ }
+ return cast<GlobalObject>(this)->getComdat();
+}
+
void GlobalObject::setSection(StringRef S) { Section = S; }
bool GlobalValue::isDeclaration() const {
// Functions are definitions if they have a body.
if (const Function *F = dyn_cast<Function>(this))
- return F->empty();
+ return F->empty() && !F->isMaterializable();
// Aliases are always definitions.
assert(isa<GlobalAlias>(this));
: GlobalObject(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal,
OperandTraits<GlobalVariable>::op_begin(this),
InitVal != nullptr, Link, Name),
- isConstantGlobal(constant), threadLocalMode(TLMode),
+ isConstantGlobal(constant),
isExternallyInitializedConstant(isExternallyInitialized) {
+ setThreadLocalMode(TLMode);
if (InitVal) {
assert(InitVal->getType() == Ty &&
"Initializer should be the same type as the GlobalVariable!");
: GlobalObject(PointerType::get(Ty, AddressSpace), Value::GlobalVariableVal,
OperandTraits<GlobalVariable>::op_begin(this),
InitVal != nullptr, Link, Name),
- isConstantGlobal(constant), threadLocalMode(TLMode),
+ isConstantGlobal(constant),
isExternallyInitializedConstant(isExternallyInitialized) {
+ setThreadLocalMode(TLMode);
if (InitVal) {
assert(InitVal->getType() == Ty &&
"Initializer should be the same type as the GlobalVariable!");
// GlobalAlias Implementation
//===----------------------------------------------------------------------===//
-GlobalAlias::GlobalAlias(Type *Ty, LinkageTypes Link,
- const Twine &Name, Constant* aliasee,
+GlobalAlias::GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Link,
+ const Twine &Name, Constant *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,
+ 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);
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));
-}
-
-GlobalObject *GlobalAlias::getAliasedGlobal() {
- SmallPtrSet<GlobalValue*, 3> Visited;
-
- GlobalAlias *GA = this;
-
- for (;;) {
- GlobalValue *GV = getAliaseeGV(GA);
- if (!Visited.insert(GV))
- return nullptr;
-
- // Iterate over aliasing chain.
- GA = dyn_cast<GlobalAlias>(GV);
- if (!GA)
- return cast<GlobalObject>(GV);
- }
-}
-
-uint64_t GlobalAlias::calculateOffset(const DataLayout &DL) const {
- uint64_t Offset = 0;
- const Constant *C = this;
- while (C) {
- if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(C)) {
- C = GA->getAliasee();
- } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
- if (CE->getOpcode() == Instruction::GetElementPtr) {
- std::vector<Value*> Args;
- for (unsigned I = 1; I < CE->getNumOperands(); ++I)
- Args.push_back(CE->getOperand(I));
- Offset += DL.getIndexedOffset(CE->getOperand(0)->getType(), Args);
- }
- C = CE->getOperand(0);
- } else if (isa<GlobalValue>(C)) {
- return Offset;
- } else {
- assert(0 && "Unexpected type in alias chain!");
- return 0;
- }
- }
- return Offset;
-}
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