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; }