lib/LTO/LTO.cpp

661 handleNonPrevailingComdat(GlobalValue &GV,
663   Comdat *C = GV.getComdat();
673   if (!GV.hasLocalLinkage())
674     GV.setLinkage(GlobalValue::AvailableExternallyLinkage);
676   if (auto GO = dyn_cast<GlobalObject>(&GV))
703   for (GlobalVariable &GV : M.globals())
704     if (GV.hasAppendingLinkage())
705       Mod.Keep.push_back(&GV);
740     if (GlobalValue *GV = Msym.dyn_cast<GlobalValue *>()) {
744         Mod.Keep.push_back(GV);
749           GV->setLinkage(GlobalValue::WeakAnyLinkage);
751         GlobalValue::LinkageTypes OriginalLinkage = GV->getLinkage();
753           GV->setLinkage(GlobalValue::getWeakLinkage(
755       } else if (isa<GlobalObject>(GV) &&
756                  (GV->hasLinkOnceODRLinkage() || GV->hasWeakODRLinkage() ||
757                   GV->hasAvailableExternallyLinkage()) &&
758                  !AliasedGlobals.count(cast<GlobalObject>(GV))) {
764         Mod.Keep.push_back(GV);
765         GV->setLinkage(GlobalValue::AvailableExternallyLinkage);
766         if (GV->hasComdat())
767           NonPrevailingComdats.insert(GV->getComdat());
768         cast<GlobalObject>(GV)->setComdat(nullptr);
773         GV->setDSOLocal(true);
774         if (GV->hasDLLImportStorageClass())
775           GV->setDLLStorageClass(GlobalValue::DLLStorageClassTypes::
794     for (GlobalValue &GV : M.global_values())
795       handleNonPrevailingComdat(GV, NonPrevailingComdats);
803   for (GlobalValue *GV : Mod.Keep) {
804     if (LivenessFromIndex && !ThinLTO.CombinedIndex.isGUIDLive(GV->getGUID()))
807     if (!GV->hasAvailableExternallyLinkage()) {
808       Keep.push_back(GV);
815         RegularLTO.CombinedModule->getNamedValue(GV->getName());
819     Keep.push_back(GV);
848         // Find the summary in the module for this very GV and record the new
849         // linkage so that we can switch it when we import the GV.
992     auto *GV = new GlobalVariable(*RegularLTO.CombinedModule, Ty, false,
995     GV->setAlignment(I.second.Align);
997       OldGV->replaceAllUsesWith(ConstantExpr::getBitCast(GV, OldGV->getType()));
998       GV->takeName(OldGV);
1001       GV->setName(I.first);
1017       GlobalValue *GV =
1021       if (!GV || GV->hasLocalLinkage() || GV->isDeclaration())
1023       GV->setUnnamedAddr(R.second.UnnamedAddr ? GlobalValue::UnnamedAddr::Global
1026         GV->setLinkage(GlobalValue::InternalLinkage);
1297   // Create entries for any modules that didn't have any GV summaries