11073     const FunctionDecl *OldFD, const FunctionDecl *NewFD,  in areMultiversionVariantFunctionsCompatible()  argument
11100   if (NoProtoDiagID.getDiagID() != 0 && OldFD &&  in areMultiversionVariantFunctionsCompatible()
11101       !OldFD->getType()->getAs<FunctionProtoType>()) {  in areMultiversionVariantFunctionsCompatible()
11102     Diag(OldFD->getLocation(), NoProtoDiagID);  in areMultiversionVariantFunctionsCompatible()
11151   if (OldFD) {  in areMultiversionVariantFunctionsCompatible()
11152     QualType OldQType = Context.getCanonicalType(OldFD->getType());  in areMultiversionVariantFunctionsCompatible()
11157     const auto *OldFPT = OldFD->getType()->getAs<FunctionProtoType>();  in areMultiversionVariantFunctionsCompatible()
11179     if (OldFD->getConstexprKind() != NewFD->getConstexprKind())  in areMultiversionVariantFunctionsCompatible()
11182     if (OldFD->isInlineSpecified() != NewFD->isInlineSpecified())  in areMultiversionVariantFunctionsCompatible()
11185     if (OldFD->getFormalLinkage() != NewFD->getFormalLinkage())  in areMultiversionVariantFunctionsCompatible()
11188     if (!CLinkageMayDiffer && OldFD->isExternC() != NewFD->isExternC())  in areMultiversionVariantFunctionsCompatible()
11191     if (CheckEquivalentExceptionSpec(OldFPT, OldFD->getLocation(), NewFPT,  in areMultiversionVariantFunctionsCompatible()
11198 static bool CheckMultiVersionAdditionalRules(Sema &S, const FunctionDecl *OldFD,  in CheckMultiVersionAdditionalRules()  argument
11204     if (OldFD)  in CheckMultiVersionAdditionalRules()
11205       S.Diag(OldFD->getLocation(), diag::note_previous_declaration);  in CheckMultiVersionAdditionalRules()
11213   if (CausesMV && OldFD &&  in CheckMultiVersionAdditionalRules()
11214       checkNonMultiVersionCompatAttributes(S, OldFD, NewFD, MVKind))  in CheckMultiVersionAdditionalRules()
11221   if (OldFD && CausesMV && OldFD->isUsed(false))  in CheckMultiVersionAdditionalRules()
11225       OldFD, NewFD, S.PDiag(diag::err_multiversion_noproto),  in CheckMultiVersionAdditionalRules()
11296 static bool CheckDeclarationCausesMultiVersioning(Sema &S, FunctionDecl *OldFD,  in CheckDeclarationCausesMultiVersioning()  argument
11301   assert(!OldFD->isMultiVersion() && "Unexpected MultiVersion");  in CheckDeclarationCausesMultiVersioning()
11306   patchDefaultTargetVersion(NewFD, OldFD);  in CheckDeclarationCausesMultiVersioning()
11310   const auto *OldTA = OldFD->getAttr<TargetAttr>();  in CheckDeclarationCausesMultiVersioning()
11324   if (CheckMultiVersionAdditionalRules(S, OldFD, NewFD, true,  in CheckDeclarationCausesMultiVersioning()
11339     OldDecl = OldFD;  in CheckDeclarationCausesMultiVersioning()
11340     OldFD->setIsMultiVersion();  in CheckDeclarationCausesMultiVersioning()
11345   if (CheckMultiVersionValue(S, OldFD)) {  in CheckDeclarationCausesMultiVersioning()
11363       S.Diag(OldFD->getLocation(), diag::note_previous_declaration);  in CheckDeclarationCausesMultiVersioning()
11369   for (const auto *FD : OldFD->redecls()) {  in CheckDeclarationCausesMultiVersioning()
11385   OldFD->setIsMultiVersion();  in CheckDeclarationCausesMultiVersioning()
11425     Sema &S, FunctionDecl *OldFD, FunctionDecl *NewFD,  in CheckMultiVersionAdditionalDecl()  argument
11431   if (!MultiVersionTypesCompatible(OldFD, NewFD)) {  in CheckMultiVersionAdditionalDecl()
11433     S.Diag(OldFD->getLocation(), diag::note_previous_declaration);  in CheckMultiVersionAdditionalDecl()
11439   patchDefaultTargetVersion(OldFD, NewFD);  in CheckMultiVersionAdditionalDecl()
11440   patchDefaultTargetVersion(NewFD, OldFD);  in CheckMultiVersionAdditionalDecl()
11445   [[maybe_unused]] MultiVersionKind OldMVKind = OldFD->getMultiVersionKind();  in CheckMultiVersionAdditionalDecl()
11649   if (CheckMultiVersionAdditionalRules(S, OldFD, NewFD,  in CheckMultiVersionAdditionalDecl()
11650                                        !OldFD->isMultiVersion(), NewMVKind)) {  in CheckMultiVersionAdditionalDecl()
11656   if (!OldFD->isMultiVersion()) {  in CheckMultiVersionAdditionalDecl()
11657     OldFD->setIsMultiVersion();  in CheckMultiVersionAdditionalDecl()
11660     OldDecl = OldFD;  in CheckMultiVersionAdditionalDecl()
11722   FunctionDecl *OldFD = OldDecl->getAsFunction();  in CheckMultiVersionFunction()  local
11724   if (!OldFD->isMultiVersion() && MVKind == MultiVersionKind::None)  in CheckMultiVersionFunction()
11729   if (OldFD->isMultiVersion() && MVKind == MultiVersionKind::None &&  in CheckMultiVersionFunction()
11730       OldFD->getMultiVersionKind() != MultiVersionKind::TargetClones &&  in CheckMultiVersionFunction()
11731       OldFD->getMultiVersionKind() != MultiVersionKind::TargetVersion) {  in CheckMultiVersionFunction()
11733         << (OldFD->getMultiVersionKind() != MultiVersionKind::Target);  in CheckMultiVersionFunction()
11738   if (!OldFD->isMultiVersion()) {  in CheckMultiVersionFunction()
11743           S, OldFD, NewFD, Redeclaration, OldDecl, Previous);  in CheckMultiVersionFunction()
11745       if (OldFD->isUsed(false)) {  in CheckMultiVersionFunction()
11749       OldFD->setIsMultiVersion();  in CheckMultiVersionFunction()
11762   return CheckMultiVersionAdditionalDecl(S, OldFD, NewFD, NewCPUDisp,  in CheckMultiVersionFunction()
11956       auto *OldFD = OldTemplateDecl->getTemplatedDecl();  in CheckFunctionDeclaration()  local
11966       NewFD->setPreviousDeclaration(OldFD);  in CheckFunctionDeclaration()
11980         if (OldFD->isDeleted()) {  in CheckFunctionDeclaration()
11982           assert(OldFD->getCanonicalDecl() == OldFD);  in CheckFunctionDeclaration()
11984           OldFD->setDeletedAsWritten(false);  in CheckFunctionDeclaration()
11990         auto *OldFD = cast<FunctionDecl>(OldDecl);  in CheckFunctionDeclaration()  local
11992         NewFD->setPreviousDeclaration(OldFD);  in CheckFunctionDeclaration()
11994           NewFD->setAccess(OldFD->getAccess());  in CheckFunctionDeclaration()