lib/Linker/LinkModules.cpp

751 bool ModuleLinker::linkGlobalProto(GlobalVariable *SGV) {
752   GlobalValue *DGV = getLinkedToGlobal(SGV);
754   bool HasUnnamedAddr = SGV->hasUnnamedAddr();
758     if (DGV->hasAppendingLinkage() || SGV->hasAppendingLinkage())
759       return linkAppendingVarProto(cast<GlobalVariable>(DGV), SGV);
766     if (getLinkageResult(DGV, SGV, NewLinkage, NV, LinkFromSrc))
776         if (DGVar->isDeclaration() && SGV->isConstant() && !DGVar->isConstant())
785       ValueMap[SGV] = ConstantExpr::getBitCast(DGV,TypeMap.get(SGV->getType()));
789       DoNotLinkFromSource.insert(SGV);
799     new GlobalVariable(*DstM, TypeMap.get(SGV->getType()->getElementType()),
800                        SGV->isConstant(), SGV->getLinkage(), /*init*/0,
801                        SGV->getName(), /*insertbefore*/0,
802                        SGV->getThreadLocalMode(),
803                        SGV->getType()->getAddressSpace());
805   copyGVAttributes(NewDGV, SGV);
816   ValueMap[SGV] = NewDGV;