std::unique_ptr<Module> llvm::CloneModule(
const Module *M, ValueToValueMapTy &VMap,
std::function<bool(const GlobalValue *)> ShouldCloneDefinition) {
// First off, we need to create the new module.
std::unique_ptr<Module> New =
llvm::make_unique<Module>(M->getModuleIdentifier(), M->getContext());
New->setDataLayout(M->getDataLayout());
New->setTargetTriple(M->getTargetTriple());
New->setModuleInlineAsm(M->getModuleInlineAsm());
// Loop over all of the global variables, making corresponding globals in the
// new module. Here we add them to the VMap and to the new Module. We
// don't worry about attributes or initializers, they will come later.
//
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = new GlobalVariable(*New,
I->getValueType(),
I->isConstant(), I->getLinkage(),
(Constant*) nullptr, I->getName(),
(GlobalVariable*) nullptr,
I->getThreadLocalMode(),
I->getType()->getAddressSpace());
GV->copyAttributesFrom(&*I);
VMap[&*I] = GV;
}
// Loop over the functions in the module, making external functions as before
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *NF =
Function::Create(cast<FunctionType>(I->getValueType()),
I->getLinkage(), I->getName(), New.get());
NF->copyAttributesFrom(&*I);
VMap[&*I] = NF;
}
// Loop over the aliases in the module
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I) {
if (!ShouldCloneDefinition(&*I)) {
// An alias cannot act as an external reference, so we need to create
// either a function or a global variable depending on the value type.
// FIXME: Once pointee types are gone we can probably pick one or the
// other.
GlobalValue *GV;
if (I->getValueType()->isFunctionTy())
GV = Function::Create(cast<FunctionType>(I->getValueType()),
GlobalValue::ExternalLinkage, I->getName(),
New.get());
else
GV = new GlobalVariable(
*New, I->getValueType(), false, GlobalValue::ExternalLinkage,
(Constant *)nullptr, I->getName(), (GlobalVariable *)nullptr,
I->getThreadLocalMode(), I->getType()->getAddressSpace());
VMap[&*I] = GV;
// We do not copy attributes (mainly because copying between different
// kinds of globals is forbidden), but this is generally not required for
// correctness.
continue;
}
auto *GA = GlobalAlias::create(I->getValueType(),
I->getType()->getPointerAddressSpace(),
I->getLinkage(), I->getName(), New.get());
GA->copyAttributesFrom(&*I);
VMap[&*I] = GA;
}
// Now that all of the things that global variable initializer can refer to
// have been created, loop through and copy the global variable referrers
// over... We also set the attributes on the global now.
//
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = cast<GlobalVariable>(VMap[&*I]);
if (!ShouldCloneDefinition(&*I)) {
// Skip after setting the correct linkage for an external reference.
GV->setLinkage(GlobalValue::ExternalLinkage);
continue;
}
if (I->hasInitializer())
GV->setInitializer(MapValue(I->getInitializer(), VMap));
}
// Similarly, copy over function bodies now...
//
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *F = cast<Function>(VMap[&*I]);
if (!ShouldCloneDefinition(&*I)) {
// Skip after setting the correct linkage for an external reference.
F->setLinkage(GlobalValue::ExternalLinkage);
// Personality function is not valid on a declaration.
F->setPersonalityFn(nullptr);
continue;
}
if (!I->isDeclaration()) {
Function::arg_iterator DestI = F->arg_begin();
for (Function::const_arg_iterator J = I->arg_begin(); J != I->arg_end();
++J) {
DestI->setName(J->getName());
VMap[&*J] = &*DestI++;
}
SmallVector<ReturnInst*, 8> Returns; // Ignore returns cloned.
CloneFunctionInto(F, &*I, VMap, /*ModuleLevelChanges=*/true, Returns);
}
if (I->hasPersonalityFn())
F->setPersonalityFn(MapValue(I->getPersonalityFn(), VMap));
}
// And aliases
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I) {
// We already dealt with undefined aliases above.
if (!ShouldCloneDefinition(&*I))
continue;
GlobalAlias *GA = cast<GlobalAlias>(VMap[&*I]);
if (const Constant *C = I->getAliasee())
GA->setAliasee(MapValue(C, VMap));
}
// And named metadata....
for (Module::const_named_metadata_iterator I = M->named_metadata_begin(),
E = M->named_metadata_end(); I != E; ++I) {
const NamedMDNode &NMD = *I;
NamedMDNode *NewNMD = New->getOrInsertNamedMetadata(NMD.getName());
for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
NewNMD->addOperand(MapMetadata(NMD.getOperand(i), VMap));
}
return New;
}
Module *llvm::CloneModule(const Module *M, ValueToValueMapTy &VMap) {
// First off, we need to create the new module.
Module *New = new Module(M->getModuleIdentifier(), M->getContext());
New->setDataLayout(M->getDataLayout());
New->setTargetTriple(M->getTargetTriple());
New->setModuleInlineAsm(M->getModuleInlineAsm());
// Loop over all of the global variables, making corresponding globals in the
// new module. Here we add them to the VMap and to the new Module. We
// don't worry about attributes or initializers, they will come later.
//
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = new GlobalVariable(*New,
I->getType()->getElementType(),
I->isConstant(), I->getLinkage(),
(Constant*) nullptr, I->getName(),
(GlobalVariable*) nullptr,
I->getThreadLocalMode(),
I->getType()->getAddressSpace());
GV->copyAttributesFrom(I);
VMap[I] = GV;
}
// Loop over the functions in the module, making external functions as before
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *NF =
Function::Create(cast<FunctionType>(I->getType()->getElementType()),
I->getLinkage(), I->getName(), New);
NF->copyAttributesFrom(I);
VMap[I] = NF;
}
// Loop over the aliases in the module
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I) {
auto *PTy = cast<PointerType>(I->getType());
auto *GA =
GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
I->getLinkage(), I->getName(), New);
GA->copyAttributesFrom(I);
VMap[I] = GA;
}
// Now that all of the things that global variable initializer can refer to
// have been created, loop through and copy the global variable referrers
// over... We also set the attributes on the global now.
//
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = cast<GlobalVariable>(VMap[I]);
if (I->hasInitializer())
GV->setInitializer(MapValue(I->getInitializer(), VMap));
}
// Similarly, copy over function bodies now...
//
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *F = cast<Function>(VMap[I]);
if (!I->isDeclaration()) {
Function::arg_iterator DestI = F->arg_begin();
for (Function::const_arg_iterator J = I->arg_begin(); J != I->arg_end();
++J) {
DestI->setName(J->getName());
VMap[J] = DestI++;
}
SmallVector<ReturnInst*, 8> Returns; // Ignore returns cloned.
CloneFunctionInto(F, I, VMap, /*ModuleLevelChanges=*/true, Returns);
}
}
// And aliases
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I) {
GlobalAlias *GA = cast<GlobalAlias>(VMap[I]);
if (const Constant *C = I->getAliasee())
GA->setAliasee(cast<GlobalObject>(MapValue(C, VMap)));
}
// And named metadata....
for (Module::const_named_metadata_iterator I = M->named_metadata_begin(),
E = M->named_metadata_end(); I != E; ++I) {
const NamedMDNode &NMD = *I;
NamedMDNode *NewNMD = New->getOrInsertNamedMetadata(NMD.getName());
for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
NewNMD->addOperand(MapValue(NMD.getOperand(i), VMap));
}
return New;
}
Module *llvm::CloneModule(const Module *M,
DenseMap<const Value*, Value*> &ValueMap) {
// First off, we need to create the new module...
Module *New = new Module(M->getModuleIdentifier());
New->setDataLayout(M->getDataLayout());
New->setTargetTriple(M->getTargetTriple());
New->setModuleInlineAsm(M->getModuleInlineAsm());
// Copy all of the type symbol table entries over.
const TypeSymbolTable &TST = M->getTypeSymbolTable();
for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end();
TI != TE; ++TI)
New->addTypeName(TI->first, TI->second);
// Copy all of the dependent libraries over.
for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I)
New->addLibrary(*I);
// Loop over all of the global variables, making corresponding globals in the
// new module. Here we add them to the ValueMap and to the new Module. We
// don't worry about attributes or initializers, they will come later.
//
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = new GlobalVariable(I->getType()->getElementType(),
false,
GlobalValue::ExternalLinkage, 0,
I->getName(), New);
GV->setAlignment(I->getAlignment());
ValueMap[I] = GV;
}
// Loop over the functions in the module, making external functions as before
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *NF =
Function::Create(cast<FunctionType>(I->getType()->getElementType()),
GlobalValue::ExternalLinkage, I->getName(), New);
NF->copyAttributesFrom(I);
ValueMap[I] = NF;
}
// Loop over the aliases in the module
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I)
ValueMap[I] = new GlobalAlias(I->getType(), GlobalAlias::ExternalLinkage,
I->getName(), NULL, New);
// Now that all of the things that global variable initializer can refer to
// have been created, loop through and copy the global variable referrers
// over... We also set the attributes on the global now.
//
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = cast<GlobalVariable>(ValueMap[I]);
if (I->hasInitializer())
GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
ValueMap)));
GV->setLinkage(I->getLinkage());
GV->setThreadLocal(I->isThreadLocal());
GV->setConstant(I->isConstant());
}
// Similarly, copy over function bodies now...
//
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *F = cast<Function>(ValueMap[I]);
if (!I->isDeclaration()) {
Function::arg_iterator DestI = F->arg_begin();
for (Function::const_arg_iterator J = I->arg_begin(); J != I->arg_end();
++J) {
DestI->setName(J->getName());
ValueMap[J] = DestI++;
}
std::vector<ReturnInst*> Returns; // Ignore returns cloned...
CloneFunctionInto(F, I, ValueMap, Returns);
}
F->setLinkage(I->getLinkage());
}
// And aliases
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I) {
GlobalAlias *GA = cast<GlobalAlias>(ValueMap[I]);
GA->setLinkage(I->getLinkage());
if (const Constant* C = I->getAliasee())
GA->setAliasee(cast<Constant>(MapValue(C, ValueMap)));
}
return New;
}
std::unique_ptr<Module>
llvm::CloneSubModule(const Module &M,
HandleGlobalVariableFtor HandleGlobalVariable,
HandleFunctionFtor HandleFunction, bool KeepInlineAsm) {
ValueToValueMapTy VMap;
// First off, we need to create the new module.
std::unique_ptr<Module> New =
llvm::make_unique<Module>(M.getModuleIdentifier(), M.getContext());
New->setDataLayout(M.getDataLayout());
New->setTargetTriple(M.getTargetTriple());
if (KeepInlineAsm)
New->setModuleInlineAsm(M.getModuleInlineAsm());
// Copy global variables (but not initializers, yet).
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
GlobalVariable *GV = new GlobalVariable(
*New, I->getType()->getElementType(), I->isConstant(), I->getLinkage(),
(Constant *)nullptr, I->getName(), (GlobalVariable *)nullptr,
I->getThreadLocalMode(), I->getType()->getAddressSpace());
GV->copyAttributesFrom(I);
VMap[I] = GV;
}
// Loop over the functions in the module, making external functions as before
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
Function *NF =
Function::Create(cast<FunctionType>(I->getType()->getElementType()),
I->getLinkage(), I->getName(), &*New);
NF->copyAttributesFrom(I);
VMap[I] = NF;
}
// Loop over the aliases in the module
for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
I != E; ++I) {
auto *PTy = cast<PointerType>(I->getType());
auto *GA =
GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
I->getLinkage(), I->getName(), &*New);
GA->copyAttributesFrom(I);
VMap[I] = GA;
}
// Now that all of the things that global variable initializer can refer to
// have been created, loop through and copy the global variable referrers
// over... We also set the attributes on the global now.
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
GlobalVariable &GV = *cast<GlobalVariable>(VMap[I]);
HandleGlobalVariable(GV, *I, VMap);
}
// Similarly, copy over function bodies now...
//
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
Function &F = *cast<Function>(VMap[I]);
HandleFunction(F, *I, VMap);
}
// And aliases
for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
I != E; ++I) {
GlobalAlias *GA = cast<GlobalAlias>(VMap[I]);
if (const Constant *C = I->getAliasee())
GA->setAliasee(MapValue(C, VMap));
}
// And named metadata....
for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
E = M.named_metadata_end();
I != E; ++I) {
const NamedMDNode &NMD = *I;
NamedMDNode *NewNMD = New->getOrInsertNamedMetadata(NMD.getName());
for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
NewNMD->addOperand(MapMetadata(NMD.getOperand(i), VMap));
}
return New;
}
Module *llvm::CloneModule(const Module *M,
ValueToValueMapTy &VMap) {
// First off, we need to create the new module...
Module *New = new Module(M->getModuleIdentifier(), M->getContext());
New->setDataLayout(M->getDataLayout());
New->setTargetTriple(M->getTargetTriple());
New->setModuleInlineAsm(M->getModuleInlineAsm());
// Copy all of the type symbol table entries over.
const TypeSymbolTable &TST = M->getTypeSymbolTable();
for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end();
TI != TE; ++TI)
New->addTypeName(TI->first, TI->second);
// Copy all of the dependent libraries over.
for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I)
New->addLibrary(*I);
// Loop over all of the global variables, making corresponding globals in the
// new module. Here we add them to the VMap and to the new Module. We
// don't worry about attributes or initializers, they will come later.
//
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = new GlobalVariable(*New,
I->getType()->getElementType(),
false,
GlobalValue::ExternalLinkage, 0,
I->getName());
GV->setAlignment(I->getAlignment());
VMap[I] = GV;
}
// Loop over the functions in the module, making external functions as before
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *NF =
Function::Create(cast<FunctionType>(I->getType()->getElementType()),
GlobalValue::ExternalLinkage, I->getName(), New);
NF->copyAttributesFrom(I);
VMap[I] = NF;
}
// Loop over the aliases in the module
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I)
VMap[I] = new GlobalAlias(I->getType(), GlobalAlias::ExternalLinkage,
I->getName(), NULL, New);
// Now that all of the things that global variable initializer can refer to
// have been created, loop through and copy the global variable referrers
// over... We also set the attributes on the global now.
//
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = cast<GlobalVariable>(VMap[I]);
if (I->hasInitializer())
GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
VMap)));
GV->setLinkage(I->getLinkage());
GV->setThreadLocal(I->isThreadLocal());
GV->setConstant(I->isConstant());
}
// Similarly, copy over function bodies now...
//
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *F = cast<Function>(VMap[I]);
if (!I->isDeclaration()) {
Function::arg_iterator DestI = F->arg_begin();
for (Function::const_arg_iterator J = I->arg_begin(); J != I->arg_end();
++J) {
DestI->setName(J->getName());
VMap[J] = DestI++;
}
SmallVector<ReturnInst*, 8> Returns; // Ignore returns cloned.
CloneFunctionInto(F, I, VMap, Returns);
}
F->setLinkage(I->getLinkage());
}
// And aliases
for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
I != E; ++I) {
GlobalAlias *GA = cast<GlobalAlias>(VMap[I]);
GA->setLinkage(I->getLinkage());
if (const Constant* C = I->getAliasee())
GA->setAliasee(cast<Constant>(MapValue(C, VMap)));
}
// And named metadata....
for (Module::const_named_metadata_iterator I = M->named_metadata_begin(),
E = M->named_metadata_end(); I != E; ++I) {
const NamedMDNode &NMD = *I;
SmallVector<MDNode*, 4> MDs;
for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
MDs.push_back(cast<MDNode>(MapValue(NMD.getOperand(i), VMap)));
NamedMDNode::Create(New->getContext(), NMD.getName(),
MDs.data(), MDs.size(), New);
}
// Update metadata attach with instructions.
for (Module::iterator MI = New->begin(), ME = New->end(); MI != ME; ++MI)
for (Function::iterator FI = MI->begin(), FE = MI->end();
FI != FE; ++FI)
for (BasicBlock::iterator BI = FI->begin(), BE = FI->end();
BI != BE; ++BI) {
SmallVector<std::pair<unsigned, MDNode *>, 4 > MDs;
BI->getAllMetadata(MDs);
for (SmallVector<std::pair<unsigned, MDNode *>, 4>::iterator
MDI = MDs.begin(), MDE = MDs.end(); MDI != MDE; ++MDI) {
Value *MappedValue = MapValue(MDI->second, VMap);
if (MDI->second != MappedValue && MappedValue)
BI->setMetadata(MDI->first, cast<MDNode>(MappedValue));
}
}
return New;
}