diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
@@ -1329,7 +1329,7 @@ static bool CheckLiteralType(EvalInfo &Info, const Expr *E,
   // C++1y: A constant initializer for an object o [...] may also invoke
   // constexpr constructors for o and its subobjects even if those objects
   // are of non-literal class types.
-  if (Info.getLangOpts().CPlusPlus1y && This &&
+  if (Info.getLangOpts().CPlusPlus14 && This &&
       Info.EvaluatingDecl == This->getLValueBase())
     return true;
 
@@ -2491,7 +2491,7 @@ CompleteObject findCompleteObject(EvalInfo &Info, const Expr *E, AccessKinds AK,
     // Unless we're looking at a local variable or argument in a constexpr call,
     // the variable we're reading must be const.
     if (!Frame) {
-      if (Info.getLangOpts().CPlusPlus1y &&
+      if (Info.getLangOpts().CPlusPlus14 &&
           VD == Info.EvaluatingDecl.dyn_cast<const ValueDecl *>()) {
         // OK, we can read and modify an object if we're in the process of
         // evaluating its initializer, because its lifetime began in this
@@ -2607,7 +2607,7 @@ CompleteObject findCompleteObject(EvalInfo &Info, const Expr *E, AccessKinds AK,
   //
   // FIXME: Not all local state is mutable. Allow local constant subobjects
   // to be read here (but take care with 'mutable' fields).
-  if (Frame && Info.getLangOpts().CPlusPlus1y &&
+  if (Frame && Info.getLangOpts().CPlusPlus14 &&
       (Info.EvalStatus.HasSideEffects || Info.keepEvaluatingAfterFailure()))
     return CompleteObject();
 
@@ -2669,7 +2669,7 @@ static bool handleAssignment(EvalInfo &Info, const Expr *E, const LValue &LVal,
   if (LVal.Designator.Invalid)
     return false;
 
-  if (!Info.getLangOpts().CPlusPlus1y) {
+  if (!Info.getLangOpts().CPlusPlus14) {
     Info.Diag(E);
     return false;
   }
@@ -2790,7 +2790,7 @@ static bool handleCompoundAssignment(
   if (LVal.Designator.Invalid)
     return false;
 
-  if (!Info.getLangOpts().CPlusPlus1y) {
+  if (!Info.getLangOpts().CPlusPlus14) {
     Info.Diag(E);
     return false;
   }
@@ -2939,7 +2939,7 @@ static bool handleIncDec(EvalInfo &Info, const Expr *E, const LValue &LVal,
   if (LVal.Designator.Invalid)
     return false;
 
-  if (!Info.getLangOpts().CPlusPlus1y) {
+  if (!Info.getLangOpts().CPlusPlus14) {
     Info.Diag(E);
     return false;
   }
@@ -4149,7 +4149,7 @@ class ExprEvaluatorBase
     return VisitUnaryPostIncDec(UO);
   }
   bool VisitUnaryPostIncDec(const UnaryOperator *UO) {
-    if (!Info.getLangOpts().CPlusPlus1y && !Info.keepEvaluatingAfterFailure())
+    if (!Info.getLangOpts().CPlusPlus14 && !Info.keepEvaluatingAfterFailure())
       return Error(UO);
 
     LValue LVal;
@@ -4574,7 +4574,7 @@ bool LValueExprEvaluator::VisitUnaryImag(const UnaryOperator *E) {
 }
 
 bool LValueExprEvaluator::VisitUnaryPreIncDec(const UnaryOperator *UO) {
-  if (!Info.getLangOpts().CPlusPlus1y && !Info.keepEvaluatingAfterFailure())
+  if (!Info.getLangOpts().CPlusPlus14 && !Info.keepEvaluatingAfterFailure())
     return Error(UO);
 
   if (!this->Visit(UO->getSubExpr()))
@@ -4587,7 +4587,7 @@ bool LValueExprEvaluator::VisitUnaryPreIncDec(const UnaryOperator *UO) {
 
 bool LValueExprEvaluator::VisitCompoundAssignOperator(
     const CompoundAssignOperator *CAO) {
-  if (!Info.getLangOpts().CPlusPlus1y && !Info.keepEvaluatingAfterFailure())
+  if (!Info.getLangOpts().CPlusPlus14 && !Info.keepEvaluatingAfterFailure())
     return Error(CAO);
 
   APValue RHS;
@@ -4609,7 +4609,7 @@ bool LValueExprEvaluator::VisitCompoundAssignOperator(
 }
 
 bool LValueExprEvaluator::VisitBinAssign(const BinaryOperator *E) {
-  if (!Info.getLangOpts().CPlusPlus1y && !Info.keepEvaluatingAfterFailure())
+  if (!Info.getLangOpts().CPlusPlus14 && !Info.keepEvaluatingAfterFailure())
     return Error(E);
 
   APValue NewVal;

diff --git a/clang/lib/AST/Type.cpp b/clang/lib/AST/Type.cpp
@@ -1147,7 +1147,7 @@ bool Type::isLiteralType(const ASTContext &Ctx) const {
   // C++1y [basic.types]p10:
   //   A type is a literal type if it is:
   //   -- cv void; or
-  if (Ctx.getLangOpts().CPlusPlus1y && isVoidType())
+  if (Ctx.getLangOpts().CPlusPlus14 && isVoidType())
     return true;
 
   // C++11 [basic.types]p10:

diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
@@ -2012,7 +2012,7 @@ LangOptions getFormattingLangOpts(FormatStyle::LanguageStandard Standard) {
   LangOptions LangOpts;
   LangOpts.CPlusPlus = 1;
   LangOpts.CPlusPlus11 = Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
-  LangOpts.CPlusPlus1y = Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
+  LangOpts.CPlusPlus14 = Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
   LangOpts.LineComment = 1;
   LangOpts.CXXOperatorNames = 1;
   LangOpts.Bool = 1;

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1139,7 +1139,7 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
   Opts.C11 = Std.isC11();
   Opts.CPlusPlus = Std.isCPlusPlus();
   Opts.CPlusPlus11 = Std.isCPlusPlus11();
-  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
+  Opts.CPlusPlus14 = Std.isCPlusPlus14();
   Opts.CPlusPlus1z = Std.isCPlusPlus1z();
   Opts.Digraphs = Std.hasDigraphs();
   Opts.GNUMode = Std.isGNUMode();
@@ -1186,8 +1186,8 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
 
   Opts.DollarIdents = !Opts.AsmPreprocessor;
 
-  // C++1y onwards has sized global deallocation functions.
-  Opts.SizedDeallocation = Opts.CPlusPlus1y;
+  // C++14 onwards has sized global deallocation functions.
+  Opts.SizedDeallocation = Opts.CPlusPlus14;
 }
 
 /// Attempt to parse a visibility value out of the given argument.

diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -375,7 +375,7 @@ static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
     // C++1y [cpp.predefined]p1:
     //   The name __cplusplus is defined to the value 201402L when compiling a
     //   C++ translation unit.
-    else if (LangOpts.CPlusPlus1y)
+    else if (LangOpts.CPlusPlus14)
       Builder.defineMacro("__cplusplus", "201402L");
     // C++11 [cpp.predefined]p1:
     //   The name __cplusplus is defined to the value 201103L when compiling a
@@ -417,7 +417,7 @@ static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
     Builder.defineMacro("__cpp_user_defined_literals", "200809");
     Builder.defineMacro("__cpp_lambdas", "200907");
     Builder.defineMacro("__cpp_constexpr",
-                        LangOpts.CPlusPlus1y ? "201304" : "200704");
+                        LangOpts.CPlusPlus14 ? "201304" : "200704");
     Builder.defineMacro("__cpp_static_assert", "200410");
     Builder.defineMacro("__cpp_decltype", "200707");
     Builder.defineMacro("__cpp_attributes", "200809");
@@ -426,7 +426,7 @@ static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
   }
 
   // C++14 features.
-  if (LangOpts.CPlusPlus1y) {
+  if (LangOpts.CPlusPlus14) {
     Builder.defineMacro("__cpp_binary_literals", "201304");
     Builder.defineMacro("__cpp_init_captures", "201304");
     Builder.defineMacro("__cpp_generic_lambdas", "201304");

diff --git a/clang/lib/Lex/Lexer.cpp b/clang/lib/Lex/Lexer.cpp
@@ -1597,7 +1597,7 @@ bool Lexer::LexNumericConstant(Token &Result, const char *CurPtr) {
   }
 
   // If we have a digit separator, continue.
-  if (C == '\'' && getLangOpts().CPlusPlus1y) {
+  if (C == '\'' && getLangOpts().CPlusPlus14) {
     unsigned NextSize;
     char Next = getCharAndSizeNoWarn(CurPtr + Size, NextSize, getLangOpts());
     if (isIdentifierBody(Next)) {
@@ -1660,7 +1660,7 @@ const char *Lexer::LexUDSuffix(Token &Result, const char *CurPtr,
     bool IsUDSuffix = false;
     if (C == '_')
       IsUDSuffix = true;
-    else if (IsStringLiteral && getLangOpts().CPlusPlus1y) {
+    else if (IsStringLiteral && getLangOpts().CPlusPlus14) {
       // In C++1y, we need to look ahead a few characters to see if this is a
       // valid suffix for a string literal or a numeric literal (this could be
       // the 'operator""if' defining a numeric literal operator).

diff --git a/clang/lib/Lex/LiteralSupport.cpp b/clang/lib/Lex/LiteralSupport.cpp
@@ -656,7 +656,7 @@ NumericLiteralParser::NumericLiteralParser(StringRef TokSpelling,
         }
       }
       // "i", "if", and "il" are user-defined suffixes in C++1y.
-      if (PP.getLangOpts().CPlusPlus1y && *s == 'i')
+      if (PP.getLangOpts().CPlusPlus14 && *s == 'i')
         break;
       // fall through.
     case 'j':
@@ -716,7 +716,7 @@ bool NumericLiteralParser::isValidUDSuffix(const LangOptions &LangOpts,
     return true;
 
   // In C++11, there are no library suffixes.
-  if (!LangOpts.CPlusPlus1y)
+  if (!LangOpts.CPlusPlus14)
     return false;
 
   // In C++1y, "s", "h", "min", "ms", "us", and "ns" are used in the library.
@@ -813,10 +813,10 @@ void NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) {
   if ((c1 == 'b' || c1 == 'B') && (c2 == '0' || c2 == '1')) {
     // 0b101010 is a C++1y / GCC extension.
     PP.Diag(TokLoc,
-            PP.getLangOpts().CPlusPlus1y
+            PP.getLangOpts().CPlusPlus14
               ? diag::warn_cxx11_compat_binary_literal
               : PP.getLangOpts().CPlusPlus
-                ? diag::ext_binary_literal_cxx1y
+                ? diag::ext_binary_literal_cxx14
                 : diag::ext_binary_literal);
     ++s;
     radix = 2;

diff --git a/clang/lib/Lex/PPMacroExpansion.cpp b/clang/lib/Lex/PPMacroExpansion.cpp
@@ -950,15 +950,15 @@ static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
            .Case("cxx_user_literals", LangOpts.CPlusPlus11)
            .Case("cxx_variadic_templates", LangOpts.CPlusPlus11)
            // C++1y features
-           .Case("cxx_aggregate_nsdmi", LangOpts.CPlusPlus1y)
-           .Case("cxx_binary_literals", LangOpts.CPlusPlus1y)
-           .Case("cxx_contextual_conversions", LangOpts.CPlusPlus1y)
-           .Case("cxx_decltype_auto", LangOpts.CPlusPlus1y)
-           .Case("cxx_generic_lambdas", LangOpts.CPlusPlus1y)
-           .Case("cxx_init_captures", LangOpts.CPlusPlus1y)
-           .Case("cxx_relaxed_constexpr", LangOpts.CPlusPlus1y)
-           .Case("cxx_return_type_deduction", LangOpts.CPlusPlus1y)
-           .Case("cxx_variable_templates", LangOpts.CPlusPlus1y)
+           .Case("cxx_aggregate_nsdmi", LangOpts.CPlusPlus14)
+           .Case("cxx_binary_literals", LangOpts.CPlusPlus14)
+           .Case("cxx_contextual_conversions", LangOpts.CPlusPlus14)
+           .Case("cxx_decltype_auto", LangOpts.CPlusPlus14)
+           .Case("cxx_generic_lambdas", LangOpts.CPlusPlus14)
+           .Case("cxx_init_captures", LangOpts.CPlusPlus14)
+           .Case("cxx_relaxed_constexpr", LangOpts.CPlusPlus14)
+           .Case("cxx_return_type_deduction", LangOpts.CPlusPlus14)
+           .Case("cxx_variable_templates", LangOpts.CPlusPlus14)
            // C++ TSes
            //.Case("cxx_runtime_arrays", LangOpts.CPlusPlusTSArrays)
            //.Case("cxx_concepts", LangOpts.CPlusPlusTSConcepts)

diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
@@ -5201,7 +5201,7 @@ void Parser::ParseFunctionDeclarator(Declarator &D,
                                dyn_cast<CXXRecordDecl>(Actions.CurContext),
                                DS.getTypeQualifiers() |
                                (D.getDeclSpec().isConstexprSpecified() &&
-                                !getLangOpts().CPlusPlus1y
+                                !getLangOpts().CPlusPlus14
                                   ? Qualifiers::Const : 0),
                                IsCXX11MemberFunction);
 

diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -692,7 +692,7 @@ Decl *Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){
   ExprResult AssertMessage;
   if (Tok.is(tok::r_paren)) {
     Diag(Tok, getLangOpts().CPlusPlus1z
-                  ? diag::warn_cxx1y_compat_static_assert_no_message
+                  ? diag::warn_cxx14_compat_static_assert_no_message
                   : diag::ext_static_assert_no_message)
       << (getLangOpts().CPlusPlus1z
               ? FixItHint()
@@ -769,7 +769,7 @@ SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) {
       // because the typename-specifier in a function-style cast operation can't
       // be 'auto'.
       Diag(Tok.getLocation(),
-           getLangOpts().CPlusPlus1y
+           getLangOpts().CPlusPlus14
              ? diag::warn_cxx11_compat_decltype_auto_type_specifier
              : diag::ext_decltype_auto_type_specifier);
       ConsumeToken();

diff --git a/clang/lib/Parse/ParseStmt.cpp b/clang/lib/Parse/ParseStmt.cpp
@@ -1517,7 +1517,7 @@ StmtResult Parser::ParseForStatement(SourceLocation *TrailingElseLoc) {
       ForRangeInit.RangeExpr = ParseExpression();
 
     Diag(Loc, getLangOpts().CPlusPlus1z
-                  ? diag::warn_cxx1y_compat_for_range_identifier
+                  ? diag::warn_cxx14_compat_for_range_identifier
                   : diag::ext_for_range_identifier)
       << ((getLangOpts().CPlusPlus11 && !getLangOpts().CPlusPlus1z)
               ? FixItHint::CreateInsertion(Loc, "auto &&")

diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
@@ -561,7 +561,7 @@ Parser::ParseTemplateTemplateParameter(unsigned Depth, unsigned Position) {
     if (Tok.is(tok::kw_typename)) {
       Diag(Tok.getLocation(),
            getLangOpts().CPlusPlus1z
-               ? diag::warn_cxx1y_compat_template_template_param_typename
+               ? diag::warn_cxx14_compat_template_template_param_typename
                : diag::ext_template_template_param_typename)
         << (!getLangOpts().CPlusPlus1z
                 ? FixItHint::CreateReplacement(Tok.getLocation(), "class")

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
@@ -5471,7 +5471,7 @@ Sema::ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC,
 
           // Only C++1y supports variable templates (N3651).
           Diag(D.getIdentifierLoc(),
-               getLangOpts().CPlusPlus1y
+               getLangOpts().CPlusPlus14
                    ? diag::warn_cxx11_compat_variable_template
                    : diag::ext_variable_template);
         }
@@ -7027,12 +7027,12 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
         NewFD->setVirtualAsWritten(true);
       }
 
-      if (getLangOpts().CPlusPlus1y &&
+      if (getLangOpts().CPlusPlus14 &&
           NewFD->getReturnType()->isUndeducedType())
         Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_auto_fn_virtual);
     }
 
-    if (getLangOpts().CPlusPlus1y &&
+    if (getLangOpts().CPlusPlus14 &&
         (NewFD->isDependentContext() ||
          (isFriend && CurContext->isDependentContext())) &&
         NewFD->getReturnType()->isUndeducedType()) {
@@ -7784,7 +7784,7 @@ bool Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD,
   // This rule is not present in C++1y, so we produce a backwards
   // compatibility warning whenever it happens in C++11.
   CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD);
-  if (!getLangOpts().CPlusPlus1y && MD && MD->isConstexpr() &&
+  if (!getLangOpts().CPlusPlus14 && MD && MD->isConstexpr() &&
       !MD->isStatic() && !isa<CXXConstructorDecl>(MD) &&
       (MD->getTypeQualifiers() & Qualifiers::Const) == 0) {
     CXXMethodDecl *OldMD = nullptr;
@@ -7806,7 +7806,7 @@ bool Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD,
                 .IgnoreParens().getAs<FunctionTypeLoc>())
           AddConstLoc = getLocForEndOfToken(FTL.getRParenLoc());
 
-        Diag(MD->getLocation(), diag::warn_cxx1y_compat_constexpr_not_const)
+        Diag(MD->getLocation(), diag::warn_cxx14_compat_constexpr_not_const)
           << FixItHint::CreateInsertion(AddConstLoc, " const");
       }
     }
@@ -10163,7 +10163,7 @@ Decl *Sema::ActOnFinishFunctionBody(Decl *dcl, Stmt *Body,
   if (FD) {
     FD->setBody(Body);
 
-    if (getLangOpts().CPlusPlus1y && !FD->isInvalidDecl() && Body &&
+    if (getLangOpts().CPlusPlus14 && !FD->isInvalidDecl() && Body &&
         !FD->isDependentContext() && FD->getReturnType()->isUndeducedType()) {
       // If the function has a deduced result type but contains no 'return'
       // statements, the result type as written must be exactly 'auto', and

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -855,7 +855,7 @@ static bool CheckConstexprDeclStmt(Sema &SemaRef, const FunctionDecl *Dcl,
       // C++1y allows types to be defined, not just declared.
       if (cast<TagDecl>(DclIt)->isThisDeclarationADefinition())
         SemaRef.Diag(DS->getLocStart(),
-                     SemaRef.getLangOpts().CPlusPlus1y
+                     SemaRef.getLangOpts().CPlusPlus14
                        ? diag::warn_cxx11_compat_constexpr_type_definition
                        : diag::ext_constexpr_type_definition)
           << isa<CXXConstructorDecl>(Dcl);
@@ -896,7 +896,7 @@ static bool CheckConstexprDeclStmt(Sema &SemaRef, const FunctionDecl *Dcl,
         }
       }
       SemaRef.Diag(VD->getLocation(),
-                   SemaRef.getLangOpts().CPlusPlus1y
+                   SemaRef.getLangOpts().CPlusPlus14
                     ? diag::warn_cxx11_compat_constexpr_local_var
                     : diag::ext_constexpr_local_var)
         << isa<CXXConstructorDecl>(Dcl);
@@ -1041,7 +1041,7 @@ CheckConstexprFunctionStmt(Sema &SemaRef, const FunctionDecl *Dcl, Stmt *S,
   case Stmt::ContinueStmtClass:
     // C++1y allows all of these. We don't allow them as extensions in C++11,
     // because they don't make sense without variable mutation.
-    if (!SemaRef.getLangOpts().CPlusPlus1y)
+    if (!SemaRef.getLangOpts().CPlusPlus14)
       break;
     if (!Cxx1yLoc.isValid())
       Cxx1yLoc = S->getLocStart();
@@ -1115,7 +1115,7 @@ bool Sema::CheckConstexprFunctionBody(const FunctionDecl *Dcl, Stmt *Body) {
 
   if (Cxx1yLoc.isValid())
     Diag(Cxx1yLoc,
-         getLangOpts().CPlusPlus1y
+         getLangOpts().CPlusPlus14
            ? diag::warn_cxx11_compat_constexpr_body_invalid_stmt
            : diag::ext_constexpr_body_invalid_stmt)
       << isa<CXXConstructorDecl>(Dcl);
@@ -1180,7 +1180,7 @@ bool Sema::CheckConstexprFunctionBody(const FunctionDecl *Dcl, Stmt *Body) {
       // statement. We still do, unless the return type might be void, because
       // otherwise if there's no return statement, the function cannot
       // be used in a core constant expression.
-      bool OK = getLangOpts().CPlusPlus1y &&
+      bool OK = getLangOpts().CPlusPlus14 &&
                 (Dcl->getReturnType()->isVoidType() ||
                  Dcl->getReturnType()->isDependentType());
       Diag(Dcl->getLocation(),
@@ -1190,7 +1190,7 @@ bool Sema::CheckConstexprFunctionBody(const FunctionDecl *Dcl, Stmt *Body) {
     }
     if (ReturnStmts.size() > 1) {
       Diag(ReturnStmts.back(),
-           getLangOpts().CPlusPlus1y
+           getLangOpts().CPlusPlus14
              ? diag::warn_cxx11_compat_constexpr_body_multiple_return
              : diag::ext_constexpr_body_multiple_return);
       for (unsigned I = 0; I < ReturnStmts.size() - 1; ++I)
@@ -4729,7 +4729,7 @@ static bool defaultedSpecialMemberIsConstexpr(Sema &S, CXXRecordDecl *ClassDecl,
 
   case Sema::CXXCopyAssignment:
   case Sema::CXXMoveAssignment:
-    if (!S.getLangOpts().CPlusPlus1y)
+    if (!S.getLangOpts().CPlusPlus14)
       return false;
     // In C++1y, we need to perform overload resolution.
     Ctor = false;
@@ -4913,7 +4913,7 @@ void Sema::CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD) {
     // A defaulted special member cannot have cv-qualifiers.
     if (Type->getTypeQuals()) {
       Diag(MD->getLocation(), diag::err_defaulted_special_member_quals)
-        << (CSM == CXXMoveAssignment) << getLangOpts().CPlusPlus1y;
+        << (CSM == CXXMoveAssignment) << getLangOpts().CPlusPlus14;
       HadError = true;
     }
   }
@@ -4962,7 +4962,7 @@ void Sema::CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD) {
   // destructors in C++1y), this is checked elsewhere.
   bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, RD, CSM,
                                                      HasConstParam);
-  if ((getLangOpts().CPlusPlus1y ? !isa<CXXDestructorDecl>(MD)
+  if ((getLangOpts().CPlusPlus14 ? !isa<CXXDestructorDecl>(MD)
                                  : isa<CXXConstructorDecl>(MD)) &&
       MD->isConstexpr() && !Constexpr &&
       MD->getTemplatedKind() == FunctionDecl::TK_NonTemplate) {

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
@@ -59,7 +59,7 @@ bool Sema::CanUseDecl(NamedDecl *D) {
 
     // If the function has a deduced return type, and we can't deduce it,
     // then we can't use it either.
-    if (getLangOpts().CPlusPlus1y && FD->getReturnType()->isUndeducedType() &&
+    if (getLangOpts().CPlusPlus14 && FD->getReturnType()->isUndeducedType() &&
         DeduceReturnType(FD, SourceLocation(), /*Diagnose*/ false))
       return false;
   }
@@ -302,7 +302,7 @@ bool Sema::DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
 
     // If the function has a deduced return type, and we can't deduce it,
     // then we can't use it either.
-    if (getLangOpts().CPlusPlus1y && FD->getReturnType()->isUndeducedType() &&
+    if (getLangOpts().CPlusPlus14 && FD->getReturnType()->isUndeducedType() &&
         DeduceReturnType(FD, Loc))
       return true;
   }

diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp
@@ -1083,7 +1083,7 @@ Sema::ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
       DeclaratorChunk::ArrayTypeInfo &Array = D.getTypeObject(I).Arr;
       if (Expr *NumElts = (Expr *)Array.NumElts) {
         if (!NumElts->isTypeDependent() && !NumElts->isValueDependent()) {
-          if (getLangOpts().CPlusPlus1y) {
+          if (getLangOpts().CPlusPlus14) {
 	    // C++1y [expr.new]p6: Every constant-expression in a noptr-new-declarator
 	    //   shall be a converted constant expression (5.19) of type std::size_t
 	    //   and shall evaluate to a strictly positive value.
@@ -1257,7 +1257,7 @@ Sema::BuildCXXNew(SourceRange Range, bool UseGlobal,
   //   std::size_t.
   if (ArraySize && !ArraySize->isTypeDependent()) {
     ExprResult ConvertedSize;
-    if (getLangOpts().CPlusPlus1y) {
+    if (getLangOpts().CPlusPlus14) {
       assert(Context.getTargetInfo().getIntWidth() && "Builtin type of size 0?");
 
       ConvertedSize = PerformImplicitConversion(ArraySize, Context.getSizeType(),

diff --git a/clang/lib/Sema/SemaLambda.cpp b/clang/lib/Sema/SemaLambda.cpp
@@ -873,7 +873,7 @@ void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
     // We don't do this before C++1y, because we don't support deduced return
     // types there.
     QualType DefaultTypeForNoTrailingReturn =
-        getLangOpts().CPlusPlus1y ? Context.getAutoDeductType()
+        getLangOpts().CPlusPlus14 ? Context.getAutoDeductType()
                                   : Context.DependentTy;
     QualType MethodTy =
         Context.getFunctionType(DefaultTypeForNoTrailingReturn, None, EPI);
@@ -999,7 +999,7 @@ void Sema::ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro,
 
     VarDecl *Var = nullptr;
     if (C->Init.isUsable()) {
-      Diag(C->Loc, getLangOpts().CPlusPlus1y
+      Diag(C->Loc, getLangOpts().CPlusPlus14
                        ? diag::warn_cxx11_compat_init_capture
                        : diag::ext_init_capture);
 
@@ -1451,7 +1451,7 @@ ExprResult Sema::ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body,
     // different machinery.
     // FIXME: Refactor and Merge the return type deduction machinery.
     // FIXME: Assumes current resolution to core issue 975.
-    if (LSI->HasImplicitReturnType && !getLangOpts().CPlusPlus1y) {
+    if (LSI->HasImplicitReturnType && !getLangOpts().CPlusPlus14) {
       deduceClosureReturnType(*LSI);
 
       //   - if there are no return statements in the

diff --git a/clang/lib/Sema/SemaOverload.cpp b/clang/lib/Sema/SemaOverload.cpp
@@ -1067,7 +1067,7 @@ bool Sema::IsOverload(FunctionDecl *New, FunctionDecl *Old,
     // is a redeclaration of OldMethod.
     unsigned OldQuals = OldMethod->getTypeQualifiers();
     unsigned NewQuals = NewMethod->getTypeQualifiers();
-    if (!getLangOpts().CPlusPlus1y && NewMethod->isConstexpr() &&
+    if (!getLangOpts().CPlusPlus14 && NewMethod->isConstexpr() &&
         !isa<CXXConstructorDecl>(NewMethod))
       NewQuals |= Qualifiers::Const;
 
@@ -5365,14 +5365,14 @@ ExprResult Sema::PerformContextualImplicitConversion(
     CXXConversionDecl *Conversion;
     FunctionTemplateDecl *ConvTemplate = dyn_cast<FunctionTemplateDecl>(D);
     if (ConvTemplate) {
-      if (getLangOpts().CPlusPlus1y)
+      if (getLangOpts().CPlusPlus14)
         Conversion = cast<CXXConversionDecl>(ConvTemplate->getTemplatedDecl());
       else
         continue; // C++11 does not consider conversion operator templates(?).
     } else
       Conversion = cast<CXXConversionDecl>(D);
 
-    assert((!ConvTemplate || getLangOpts().CPlusPlus1y) &&
+    assert((!ConvTemplate || getLangOpts().CPlusPlus14) &&
            "Conversion operator templates are considered potentially "
            "viable in C++1y");
 
@@ -5385,7 +5385,7 @@ ExprResult Sema::PerformContextualImplicitConversion(
         if (!ConvTemplate)
           ExplicitConversions.addDecl(I.getDecl(), I.getAccess());
       } else {
-        if (!ConvTemplate && getLangOpts().CPlusPlus1y) {
+        if (!ConvTemplate && getLangOpts().CPlusPlus14) {
           if (ToType.isNull())
             ToType = CurToType.getUnqualifiedType();
           else if (HasUniqueTargetType &&
@@ -5397,7 +5397,7 @@ ExprResult Sema::PerformContextualImplicitConversion(
     }
   }
 
-  if (getLangOpts().CPlusPlus1y) {
+  if (getLangOpts().CPlusPlus14) {
     // C++1y [conv]p6:
     // ... An expression e of class type E appearing in such a context
     // is said to be contextually implicitly converted to a specified
@@ -6165,7 +6165,7 @@ Sema::AddConversionCandidate(CXXConversionDecl *Conversion,
 
   // If the conversion function has an undeduced return type, trigger its
   // deduction now.
-  if (getLangOpts().CPlusPlus1y && ConvType->isUndeducedType()) {
+  if (getLangOpts().CPlusPlus14 && ConvType->isUndeducedType()) {
     if (DeduceReturnType(Conversion, From->getExprLoc()))
       return;
     ConvType = Conversion->getConversionType().getNonReferenceType();
@@ -9865,7 +9865,7 @@ class AddressOfFunctionResolver
 
       // If any candidate has a placeholder return type, trigger its deduction
       // now.
-      if (S.getLangOpts().CPlusPlus1y &&
+      if (S.getLangOpts().CPlusPlus14 &&
           FunDecl->getReturnType()->isUndeducedType() &&
           S.DeduceReturnType(FunDecl, SourceExpr->getLocStart(), Complain))
         return false;
@@ -10170,7 +10170,7 @@ Sema::ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
     if (FoundResult) *FoundResult = I.getPair();    
   }
 
-  if (Matched && getLangOpts().CPlusPlus1y &&
+  if (Matched && getLangOpts().CPlusPlus14 &&
       Matched->getReturnType()->isUndeducedType() &&
       DeduceReturnType(Matched, ovl->getExprLoc(), Complain))
     return nullptr;

diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp
@@ -2855,7 +2855,7 @@ StmtResult Sema::BuildReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp) {
 
   // FIXME: Add a flag to the ScopeInfo to indicate whether we're performing
   // deduction.
-  if (getLangOpts().CPlusPlus1y) {
+  if (getLangOpts().CPlusPlus14) {
     if (AutoType *AT = FnRetType->getContainedAutoType()) {
       FunctionDecl *FD = cast<FunctionDecl>(CurContext);
       if (DeduceFunctionTypeFromReturnExpr(FD, ReturnLoc, RetValExp, AT)) {

diff --git a/clang/lib/Sema/SemaTemplateDeduction.cpp b/clang/lib/Sema/SemaTemplateDeduction.cpp
@@ -3003,7 +3003,7 @@ Sema::FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate,
 static QualType GetTypeOfFunction(Sema &S, const OverloadExpr::FindResult &R,
                                   FunctionDecl *Fn) {
   // We may need to deduce the return type of the function now.
-  if (S.getLangOpts().CPlusPlus1y && Fn->getReturnType()->isUndeducedType() &&
+  if (S.getLangOpts().CPlusPlus14 && Fn->getReturnType()->isUndeducedType() &&
       S.DeduceReturnType(Fn, R.Expression->getExprLoc(), /*Diagnose*/ false))
     return QualType();
 
@@ -3582,7 +3582,7 @@ Sema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
   // If the function has a deduced return type, substitute it for a dependent
   // type so that we treat it as a non-deduced context in what follows.
   bool HasDeducedReturnType = false;
-  if (getLangOpts().CPlusPlus1y && InOverloadResolution &&
+  if (getLangOpts().CPlusPlus14 && InOverloadResolution &&
       Function->getReturnType()->getContainedAutoType()) {
     FunctionType = SubstAutoType(FunctionType, Context.DependentTy);
     HasDeducedReturnType = true;

diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp
@@ -763,7 +763,7 @@ static QualType ConvertDeclSpecToType(TypeProcessingState &state) {
     // is inferred from the return statements inside the block.
     // The declspec is always missing in a lambda expr context; it is either
     // specified with a trailing return type or inferred.
-    if (S.getLangOpts().CPlusPlus1y &&
+    if (S.getLangOpts().CPlusPlus14 &&
         declarator.getContext() == Declarator::LambdaExprContext) {
       // In C++1y, a lambda's implicit return type is 'auto'.
       Result = Context.getAutoDeductType();
@@ -2175,7 +2175,7 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
       Error = 0;  
       break;
     case Declarator::LambdaExprParameterContext:
-      if (!(SemaRef.getLangOpts().CPlusPlus1y 
+      if (!(SemaRef.getLangOpts().CPlusPlus14 
               && D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto))
         Error = 14;
       break;
@@ -2208,11 +2208,11 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
       Error = 10; // Type alias
       break;
     case Declarator::TrailingReturnContext:
-      if (!SemaRef.getLangOpts().CPlusPlus1y)
+      if (!SemaRef.getLangOpts().CPlusPlus14)
         Error = 11; // Function return type
       break;
     case Declarator::ConversionIdContext:
-      if (!SemaRef.getLangOpts().CPlusPlus1y)
+      if (!SemaRef.getLangOpts().CPlusPlus14)
         Error = 12; // conversion-type-id
       break;
     case Declarator::TypeNameContext:
@@ -2697,7 +2697,7 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
         // and not, for instance, a pointer to a function.
         if (D.getDeclSpec().containsPlaceholderType() &&
             !FTI.hasTrailingReturnType() && chunkIndex == 0 &&
-            !S.getLangOpts().CPlusPlus1y) {
+            !S.getLangOpts().CPlusPlus14) {
           S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(),
                  D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto
                      ? diag::err_auto_missing_trailing_return

diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p1.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p1.cpp
@@ -71,7 +71,7 @@ struct ConstexprDtor {
 template <typename T> constexpr T ft(T t) { return t; }
 template <typename T> T gt(T t) { return t; }
 struct S {
-  template<typename T> constexpr T f(); // expected-warning {{C++1y}}
+  template<typename T> constexpr T f(); // expected-warning {{C++14}}
   template <typename T>
   T g() const; // expected-note-re {{candidate template ignored: could not match 'T (){{( __attribute__\(\(thiscall\)\))?}} const' against 'char (){{( __attribute__\(\(thiscall\)\))?}}'}}
 };
@@ -82,7 +82,7 @@ template <> char ft(char c) { return c; } // expected-note {{previous}}
 template <> constexpr char ft(char nl); // expected-error {{constexpr declaration of 'ft<char>' follows non-constexpr declaration}}
 template <> constexpr int gt(int nl) { return nl; }
 template <> notlit S::f() const { return notlit(); }
-template <> constexpr int S::g() { return 0; } // expected-note {{previous}} expected-warning {{C++1y}}
+template <> constexpr int S::g() { return 0; } // expected-note {{previous}} expected-warning {{C++14}}
 template <> int S::g() const; // expected-error {{non-constexpr declaration of 'g<int>' follows constexpr declaration}}
 // specializations can drop the 'constexpr' but not the implied 'const'.
 template <> char S::g() { return 0; } // expected-error {{no function template matches}}

diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p3.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p3.cpp
@@ -21,7 +21,7 @@ struct Literal {
 struct S {
   virtual int ImplicitlyVirtual() const = 0; // expected-note {{overridden virtual function}}
 };
-struct SS : S { 
+struct SS : S {
   int ImplicitlyVirtual() const;
 };
 
@@ -62,7 +62,7 @@ struct T : SS, NonLiteral { // expected-note {{base class 'NonLiteral' of non-li
   constexpr T &operator=(const T&) = default;
 #ifndef CXX1Y
   // expected-error@-2 {{an explicitly-defaulted copy assignment operator may not have 'const', 'constexpr' or 'volatile' qualifiers}}
-  // expected-warning@-3 {{C++1y}}
+  // expected-warning@-3 {{C++14}}
 #else
   // expected-error@-5 {{defaulted definition of copy assignment operator is not constexpr}}
 #endif
@@ -161,58 +161,58 @@ constexpr int ForStmt() {
 constexpr int VarDecl() {
   int a = 0;
 #ifndef CXX1Y
-  // expected-error@-2 {{variable declaration in a constexpr function is a C++1y extension}}
+  // expected-error@-2 {{variable declaration in a constexpr function is a C++14 extension}}
 #endif
   return 0;
 }
 constexpr int ConstexprVarDecl() {
   constexpr int a = 0;
 #ifndef CXX1Y
-  // expected-error@-2 {{variable declaration in a constexpr function is a C++1y extension}}
+  // expected-error@-2 {{variable declaration in a constexpr function is a C++14 extension}}
 #endif
   return 0;
 }
 constexpr int VarWithCtorDecl() {
   Literal a;
 #ifndef CXX1Y
-  // expected-error@-2 {{variable declaration in a constexpr function is a C++1y extension}}
+  // expected-error@-2 {{variable declaration in a constexpr function is a C++14 extension}}
 #endif
   return 0;
 }
 NonLiteral nl;
 constexpr NonLiteral &ExternNonLiteralVarDecl() {
   extern NonLiteral nl;
 #ifndef CXX1Y
-  // expected-error@-2 {{variable declaration in a constexpr function is a C++1y extension}}
+  // expected-error@-2 {{variable declaration in a constexpr function is a C++14 extension}}
 #endif
   return nl;
 }
 static_assert(&ExternNonLiteralVarDecl() == &nl, "");
 constexpr int FuncDecl() {
   constexpr int ForwardDecl(int);
 #ifndef CXX1Y
-  // expected-error@-2 {{use of this statement in a constexpr function is a C++1y extension}}
+  // expected-error@-2 {{use of this statement in a constexpr function is a C++14 extension}}
 #endif
   return ForwardDecl(42);
 }
 constexpr int ClassDecl1() {
   typedef struct { } S1;
 #ifndef CXX1Y
-  // expected-error@-2 {{type definition in a constexpr function is a C++1y extension}}
+  // expected-error@-2 {{type definition in a constexpr function is a C++14 extension}}
 #endif
   return 0;
 }
 constexpr int ClassDecl2() {
   using S2 = struct { };
 #ifndef CXX1Y
-  // expected-error@-2 {{type definition in a constexpr function is a C++1y extension}}
+  // expected-error@-2 {{type definition in a constexpr function is a C++14 extension}}
 #endif
   return 0;
 }
 constexpr int ClassDecl3() {
   struct S3 { };
 #ifndef CXX1Y
-  // expected-error@-2 {{type definition in a constexpr function is a C++1y extension}}
+  // expected-error@-2 {{type definition in a constexpr function is a C++14 extension}}
 #endif
   return 0;
 }
@@ -245,11 +245,11 @@ namespace DR1364 {
 
 namespace rdar13584715 {
   typedef __PTRDIFF_TYPE__ ptrdiff_t;
-  
+
   template<typename T> struct X {
     static T value() {};
   };
-  
+
   void foo(ptrdiff_t id) {
     switch (id) {
     case reinterpret_cast<ptrdiff_t>(&X<long>::value):  // expected-error{{case value is not a constant expression}} \
@@ -269,7 +269,7 @@ namespace std_example {
   constexpr int abs(int x) {
     if (x < 0)
 #ifndef CXX1Y
-      // expected-error@-2 {{C++1y}}
+      // expected-error@-2 {{C++14}}
 #endif
       x = -x;
     return x;
@@ -295,7 +295,7 @@ namespace std_example {
     return r;
   }
 #ifndef CXX1Y
-    // expected-error@-5 {{C++1y}}
+    // expected-error@-5 {{C++14}}
     // expected-error@-5 {{statement not allowed}}
 #endif
 }
diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p4.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p4.cpp
@@ -92,37 +92,37 @@ struct V {
   constexpr V(int(&)[2]) {
     constexpr int a = 0;
 #ifndef CXX1Y
-    // expected-error@-2 {{variable declaration in a constexpr constructor is a C++1y extension}}
+    // expected-error@-2 {{variable declaration in a constexpr constructor is a C++14 extension}}
 #endif
   }
   constexpr V(int(&)[3]) {
     constexpr int ForwardDecl(int);
 #ifndef CXX1Y
-    // expected-error@-2 {{use of this statement in a constexpr constructor is a C++1y extension}}
+    // expected-error@-2 {{use of this statement in a constexpr constructor is a C++14 extension}}
 #endif
   }
   constexpr V(int(&)[4]) {
     typedef struct { } S1;
 #ifndef CXX1Y
-    // expected-error@-2 {{type definition in a constexpr constructor is a C++1y extension}}
+    // expected-error@-2 {{type definition in a constexpr constructor is a C++14 extension}}
 #endif
   }
   constexpr V(int(&)[5]) {
     using S2 = struct { };
 #ifndef CXX1Y
-    // expected-error@-2 {{type definition in a constexpr constructor is a C++1y extension}}
+    // expected-error@-2 {{type definition in a constexpr constructor is a C++14 extension}}
 #endif
   }
   constexpr V(int(&)[6]) {
     struct S3 { };
 #ifndef CXX1Y
-    // expected-error@-2 {{type definition in a constexpr constructor is a C++1y extension}}
+    // expected-error@-2 {{type definition in a constexpr constructor is a C++14 extension}}
 #endif
   }
   constexpr V(int(&)[7]) {
     return;
 #ifndef CXX1Y
-    // expected-error@-2 {{use of this statement in a constexpr constructor is a C++1y extension}}
+    // expected-error@-2 {{use of this statement in a constexpr constructor is a C++14 extension}}
 #endif
   }
 };

diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p5.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p5.cpp
@@ -102,7 +102,7 @@ X x = cmin(X(), X()); // ok, not constexpr
 template<typename T>
 struct Y {
   constexpr Y() {}
-  constexpr int get() { return T(); } // expected-warning {{C++1y}}
+  constexpr int get() { return T(); } // expected-warning {{C++14}}
 };
 struct Z { operator int(); };
 

diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p8.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p8.cpp
@@ -3,13 +3,13 @@
 using size_t = decltype(sizeof(int));
 
 struct S {
-  constexpr int f(); // expected-warning {{C++1y}}
+  constexpr int f(); // expected-warning {{C++14}}
   constexpr int g() const;
-  constexpr int h(); // expected-warning {{C++1y}}
+  constexpr int h(); // expected-warning {{C++14}}
   int h();
   static constexpr int Sf();
   /*static*/ constexpr void *operator new(size_t) noexcept;
-  template<typename T> constexpr T tm(); // expected-warning {{C++1y}}
+  template<typename T> constexpr T tm(); // expected-warning {{C++14}}
   template<typename T> static constexpr T ts();
 };
 
@@ -26,12 +26,12 @@ void f(const S &s) {
 }
 
 constexpr int S::f() const { return 0; }
-constexpr int S::g() { return 1; } // expected-warning {{C++1y}}
-constexpr int S::h() { return 0; } // expected-warning {{C++1y}}
+constexpr int S::g() { return 1; } // expected-warning {{C++14}}
+constexpr int S::h() { return 0; } // expected-warning {{C++14}}
 int S::h() { return 0; }
 constexpr int S::Sf() { return 2; }
 constexpr void *S::operator new(size_t) noexcept { return 0; }
-template<typename T> constexpr T S::tm() { return T(); } // expected-warning {{C++1y}}
+template<typename T> constexpr T S::tm() { return T(); } // expected-warning {{C++14}}
 template<typename T> constexpr T S::ts() { return T(); }
 
 namespace std_example {

diff --git a/clang/test/CXX/temp/temp.decls/temp.class/temp.static/p1.cpp b/clang/test/CXX/temp/temp.decls/temp.class/temp.static/p1.cpp
@@ -8,7 +8,7 @@ struct X0 {
 template<typename T>
 T X0<T>::value = 0; // expected-error{{no viable conversion}}
 
-struct X1 { 
+struct X1 {
   X1(int);
 };
 
@@ -19,8 +19,8 @@ X1& get_X1() { return X0<X1>::value; }
 
 double*& get_double_ptr() { return X0<int*>::value; } // expected-error{{non-const lvalue reference to type 'double *' cannot bind to a value of unrelated type 'int *'}}
 
-X2& get_X2() { 
+X2& get_X2() {
   return X0<X2>::value; // expected-note{{instantiation}}
 }
-  
-template<typename T> T x; // expected-warning{{variable templates are a C++1y extension}}
+
+template<typename T> T x; // expected-warning{{variable templates are a C++14 extension}}
diff --git a/clang/test/CXX/temp/temp.spec/temp.explicit/p1-0x.cpp b/clang/test/CXX/temp/temp.spec/temp.explicit/p1-0x.cpp
@@ -9,7 +9,7 @@ template inline void X<int>::f(); // expected-error{{explicit instantiation cann
 
 template<typename T>
 struct Y {
-  constexpr int f() { return 0; } // expected-warning{{C++1y}}
+  constexpr int f() { return 0; } // expected-warning{{C++14}}
 };
 
 template constexpr int Y<int>::f() const; // expected-error{{explicit instantiation cannot be 'constexpr'}}

diff --git a/clang/test/FixIt/fixit-cxx1y-compat.cpp b/clang/test/FixIt/fixit-cxx1y-compat.cpp
@@ -7,6 +7,6 @@
 // This is a test of the code modification hints for C++1y-compatibility problems.
 
 struct S {
-  constexpr int &f(); // expected-warning {{'constexpr' non-static member function will not be implicitly 'const' in C++1y; add 'const' to avoid a change in behavior}}
+  constexpr int &f(); // expected-warning {{'constexpr' non-static member function will not be implicitly 'const' in C++14; add 'const' to avoid a change in behavior}}
   int &f();
 };
diff --git a/clang/test/SemaCXX/constant-expression-cxx11.cpp b/clang/test/SemaCXX/constant-expression-cxx11.cpp
@@ -1443,7 +1443,7 @@ namespace InvalidClasses {
 
 namespace NamespaceAlias {
   constexpr int f() {
-    namespace NS = NamespaceAlias; // expected-warning {{use of this statement in a constexpr function is a C++1y extension}}
+    namespace NS = NamespaceAlias; // expected-warning {{use of this statement in a constexpr function is a C++14 extension}}
     return &NS::f != nullptr;
   }
 }
@@ -1700,7 +1700,7 @@ namespace VirtualFromBase {
   template <typename T> struct X : T {
     constexpr X() {}
     double d = 0.0;
-    constexpr int f() { return sizeof(T); } // expected-warning {{will not be implicitly 'const' in C++1y}}
+    constexpr int f() { return sizeof(T); } // expected-warning {{will not be implicitly 'const' in C++14}}
   };
 
   // Virtual f(), not OK.
@@ -1715,17 +1715,17 @@ namespace VirtualFromBase {
 }
 
 namespace ConstexprConstructorRecovery {
-  class X { 
-  public: 
-      enum E : short { 
-          headers = 0x1, 
-          middlefile = 0x2, 
-          choices = 0x4 
-      }; 
-      constexpr X() noexcept {}; 
-  protected: 
+  class X {
+  public:
+      enum E : short {
+          headers = 0x1,
+          middlefile = 0x2,
+          choices = 0x4
+      };
+      constexpr X() noexcept {};
+  protected:
       E val{0}; // expected-error {{cannot initialize a member subobject of type 'ConstexprConstructorRecovery::X::E' with an rvalue of type 'int'}}
-  }; 
+  };
   constexpr X x{};
 }
 

diff --git a/clang/test/SemaCXX/cxx0x-compat.cpp b/clang/test/SemaCXX/cxx0x-compat.cpp
@@ -43,7 +43,7 @@ char c = 'x'_x; // expected-warning {{will be treated as a user-defined literal
 
 #else
 
-auto init_capture = [a(0)] {}; // expected-warning {{initialized lambda captures are incompatible with C++ standards before C++1y}}
+auto init_capture = [a(0)] {}; // expected-warning {{initialized lambda captures are incompatible with C++ standards before C++14}}
 static_assert(true); // expected-warning {{incompatible with C++ standards before C++1z}}
 
 #endif
diff --git a/clang/test/SemaCXX/cxx1y-constexpr-not-const.cpp b/clang/test/SemaCXX/cxx1y-constexpr-not-const.cpp
@@ -14,5 +14,5 @@ struct X {
 // expected-error@6 {{non-constexpr declaration of 'f' follows constexpr declaration}}
 // expected-note@5 {{previous}}
 #else
-// expected-warning@5 {{'constexpr' non-static member function will not be implicitly 'const' in C++1y; add 'const' to avoid a change in behavior}}
+// expected-warning@5 {{'constexpr' non-static member function will not be implicitly 'const' in C++14; add 'const' to avoid a change in behavior}}
 #endif
diff --git a/clang/test/SemaCXX/cxx98-compat-pedantic.cpp b/clang/test/SemaCXX/cxx98-compat-pedantic.cpp
@@ -49,5 +49,5 @@ unsigned long long ull1 = // expected-warning {{'long long' is incompatible with
 
 int k = 0b1001;
 #ifdef CXX1Y
-// expected-warning@-2 {{binary integer literals are incompatible with C++ standards before C++1y}}
+// expected-warning@-2 {{binary integer literals are incompatible with C++ standards before C++14}}
 #endif
diff --git a/clang/test/SemaCXX/cxx98-compat.cpp b/clang/test/SemaCXX/cxx98-compat.cpp
@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wc++98-compat -verify %s
-// RUN: %clang_cc1 -fsyntax-only -std=c++1y -Wc++98-compat -verify %s -DCXX1YCOMPAT
+// RUN: %clang_cc1 -fsyntax-only -std=c++1y -Wc++98-compat -verify %s -DCXX14COMPAT
 
 namespace std {
   struct type_info;
@@ -373,10 +373,10 @@ namespace rdar11736429 {
 }
 
 template<typename T> T var = T(10);
-#ifdef CXX1YCOMPAT
-// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
+#ifdef CXX14COMPAT
+// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
 #else
-// expected-warning@-4 {{variable templates are a C++1y extension}}
+// expected-warning@-4 {{variable templates are a C++14 extension}}
 #endif
 
 // No diagnostic for specializations of variable templates; we will have
@@ -388,34 +388,34 @@ float fvar = var<float>;
 
 class A {
   template<typename T> static T var = T(10);
-#ifdef CXX1YCOMPAT
-// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
+#ifdef CXX14COMPAT
+// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
 #else
-// expected-warning@-4 {{variable templates are a C++1y extension}}
+// expected-warning@-4 {{variable templates are a C++14 extension}}
 #endif
 
-  template<typename T> static T* var<T*> = new T(); 
+  template<typename T> static T* var<T*> = new T();
 };
 
 struct B {  template<typename T> static T v; };
-#ifdef CXX1YCOMPAT
-// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
+#ifdef CXX14COMPAT
+// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
 #else
-// expected-warning@-4 {{variable templates are a C++1y extension}}
+// expected-warning@-4 {{variable templates are a C++14 extension}}
 #endif
 
 template<typename T> T B::v = T();
-#ifdef CXX1YCOMPAT
-// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
+#ifdef CXX14COMPAT
+// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
 #else
-// expected-warning@-4 {{variable templates are a C++1y extension}}
+// expected-warning@-4 {{variable templates are a C++14 extension}}
 #endif
 
 template<typename T> T* B::v<T*> = new T();
 template<> int B::v<int> = 10;
 template int B::v<int>;
 float fsvar = B::v<float>;
 
-#ifdef CXX1YCOMPAT
-int digit_seps = 123'456; // expected-warning {{digit separators are incompatible with C++ standards before C++1y}}
+#ifdef CXX14COMPAT
+int digit_seps = 123'456; // expected-warning {{digit separators are incompatible with C++ standards before C++14}}
 #endif
diff --git a/clang/test/SemaCXX/trailing-return-0x.cpp b/clang/test/SemaCXX/trailing-return-0x.cpp
@@ -17,8 +17,8 @@ auto f() -> int
     return 0;
 }
 
-auto g(); // expected-error{{return without trailing return type; deduced return types are a C++1y extension}}
-decltype(auto) g2(); // expected-warning{{extension}} expected-error-re{{{{^}}deduced return types are a C++1y extension}}
+auto g(); // expected-error{{return without trailing return type; deduced return types are a C++14 extension}}
+decltype(auto) g2(); // expected-warning{{extension}} expected-error-re{{{{^}}deduced return types are a C++14 extension}}
 auto badness = g2();
 
 int h() -> int; // expected-error{{trailing return type must specify return type 'auto', not 'int'}}
@@ -75,14 +75,14 @@ only<double> p4 = xx.get_nested<double>().h(0L, 1.0, 3.14f);
 namespace PR12053 {
   template <typename T>
   auto f1(T t) -> decltype(f1(t)) {} // expected-note{{candidate template ignored}}
-  
+
   void test_f1() {
     f1(0); // expected-error{{no matching function for call to 'f1'}}
   }
-  
+
   template <typename T>
   auto f2(T t) -> decltype(f2(&t)) {} // expected-note{{candidate template ignored}}
-  
+
   void test_f2() {
     f2(0); // expected-error{{no matching function for call to 'f2'}}
   }

diff --git a/clang/test/SemaCXX/unknown-type-name.cpp b/clang/test/SemaCXX/unknown-type-name.cpp
@@ -27,7 +27,7 @@ int var(zepelin); // expected-error{{did you mean 'zeppelin'?}}
 template<typename T>
 struct A {
   typedef T type;
-  
+
   type f();
 
   type g();
@@ -93,14 +93,14 @@ template<typename T> int A<T>::h(T::type x, char) {} // expected-error{{missing
 template<typename T> int h(T::type, int); // expected-error{{missing 'typename'}}
 template<typename T> int h(T::type x, char); // expected-error{{missing 'typename'}}
 
-template<typename T> int junk1(T::junk); // expected-warning{{variable templates are a C++1y extension}}
+template<typename T> int junk1(T::junk); // expected-warning{{variable templates are a C++14 extension}}
 template<typename T> int junk2(T::junk) throw(); // expected-error{{missing 'typename'}}
 template<typename T> int junk3(T::junk) = delete; // expected-error{{missing 'typename'}} expected-warning{{C++11}}
 template<typename T> int junk4(T::junk j); // expected-error{{missing 'typename'}}
 
 // FIXME: We can tell this was intended to be a function because it does not
 //        have a dependent nested name specifier.
-template<typename T> int i(T::type, int()); // expected-warning{{variable templates are a C++1y extension}}
+template<typename T> int i(T::type, int()); // expected-warning{{variable templates are a C++14 extension}}
 
 // FIXME: We know which type specifier should have been specified here. Provide
 //        a fix-it to add 'typename A<T>::type'

diff --git a/clang/test/SemaTemplate/class-template-decl.cpp b/clang/test/SemaTemplate/class-template-decl.cpp
@@ -57,7 +57,7 @@ void f() {
   template<typename T> class X; // expected-error{{expression}}
 }
 
-template<typename T> class X1 var; // expected-warning{{variable templates are a C++1y extension}} \
+template<typename T> class X1 var; // expected-warning{{variable templates are a C++14 extension}} \
                                    // expected-error {{variable has incomplete type 'class X1'}} \
                                    // expected-note {{forward declaration of 'X1'}}