Index: include/clang/AST/ASTImporter.h
===================================================================
--- include/clang/AST/ASTImporter.h
+++ include/clang/AST/ASTImporter.h
@@ -23,7 +23,6 @@
 
 namespace clang {
   class ASTContext;
-  class CXXCtorInitializer;
   class Decl;
   class DeclContext;
   class DiagnosticsEngine;
@@ -205,14 +204,6 @@
     /// \returns the equivalent file ID in the source manager of the "to"
     /// context.
     FileID Import(FileID);
-
-    /// \brief Import the given C++ constructor initializer from the "from"
-    /// context into the "to" context.
-    ///
-    /// \returns the equivalent initializer in the "to" context.
-    CXXCtorInitializer *Import(CXXCtorInitializer *FromInit);
-
-
     
     /// \brief Import the definition of the given declaration, including all of
     /// the declarations it contains.
Index: lib/AST/ASTImporter.cpp
===================================================================
--- lib/AST/ASTImporter.cpp
+++ lib/AST/ASTImporter.cpp
@@ -3029,22 +3029,6 @@
                                             D->isInlineSpecified(), 
                                             D->isImplicit(),
                                             D->isConstexpr());
-    if (unsigned NumInitializers = FromConstructor->getNumCtorInitializers()) {
-      SmallVector<CXXCtorInitializer *, 4> CtorInitializers;
-      for (CXXCtorInitializer *I : FromConstructor->inits()) {
-        CXXCtorInitializer *ToI =
-            cast_or_null<CXXCtorInitializer>(Importer.Import(I));
-        if (!ToI && I)
-          return nullptr;
-        CtorInitializers.push_back(ToI);
-      }
-      CXXCtorInitializer **Memory =
-          new (Importer.getToContext()) CXXCtorInitializer *[NumInitializers];
-      std::copy(CtorInitializers.begin(), CtorInitializers.end(), Memory);
-      CXXConstructorDecl *ToCtor = llvm::cast<CXXConstructorDecl>(ToFunction);
-      ToCtor->setCtorInitializers(Memory);
-      ToCtor->setNumCtorInitializers(NumInitializers);
-    }
   } else if (isa<CXXDestructorDecl>(D)) {
     ToFunction = CXXDestructorDecl::Create(Importer.getToContext(),
                                            cast<CXXRecordDecl>(DC),
@@ -6376,72 +6360,6 @@
   return ToID;
 }
 
-CXXCtorInitializer *ASTImporter::Import(CXXCtorInitializer *From) {
-  Expr *ToExpr = Import(From->getInit());
-  if (!ToExpr && From->getInit())
-    return nullptr;
-
-  if (From->isBaseInitializer()) {
-    TypeSourceInfo *ToTInfo = Import(From->getTypeSourceInfo());
-    if (!ToTInfo && From->getTypeSourceInfo())
-      return nullptr;
-
-    return new (ToContext) CXXCtorInitializer(
-        ToContext, ToTInfo, From->isBaseVirtual(), Import(From->getLParenLoc()),
-        ToExpr, Import(From->getRParenLoc()),
-        From->isPackExpansion() ? Import(From->getEllipsisLoc())
-                                : SourceLocation());
-  } else if (From->isMemberInitializer()) {
-    FieldDecl *ToField =
-        llvm::cast_or_null<FieldDecl>(Import(From->getMember()));
-    if (!ToField && From->getMember())
-      return nullptr;
-
-    return new (ToContext) CXXCtorInitializer(
-        ToContext, ToField, Import(From->getMemberLocation()),
-        Import(From->getLParenLoc()), ToExpr, Import(From->getRParenLoc()));
-  } else if (From->isIndirectMemberInitializer()) {
-    IndirectFieldDecl *ToIField = llvm::cast_or_null<IndirectFieldDecl>(
-        Import(From->getIndirectMember()));
-    if (!ToIField && From->getIndirectMember())
-      return nullptr;
-
-    return new (ToContext) CXXCtorInitializer(
-        ToContext, ToIField, Import(From->getMemberLocation()),
-        Import(From->getLParenLoc()), ToExpr, Import(From->getRParenLoc()));
-  } else if (From->isDelegatingInitializer()) {
-    TypeSourceInfo *ToTInfo = Import(From->getTypeSourceInfo());
-    if (!ToTInfo && From->getTypeSourceInfo())
-      return nullptr;
-
-    return new (ToContext)
-        CXXCtorInitializer(ToContext, ToTInfo, Import(From->getLParenLoc()),
-                           ToExpr, Import(From->getRParenLoc()));
-  } else if (unsigned NumArrayIndices = From->getNumArrayIndices()) {
-    FieldDecl *ToField =
-        llvm::cast_or_null<FieldDecl>(Import(From->getMember()));
-    if (!ToField && From->getMember())
-      return nullptr;
-
-    SmallVector<VarDecl *, 4> ToAIs(NumArrayIndices);
-
-    for (unsigned AII = 0; AII < NumArrayIndices; ++AII) {
-      VarDecl *ToArrayIndex =
-          dyn_cast_or_null<VarDecl>(Import(From->getArrayIndex(AII)));
-      if (!ToArrayIndex && From->getArrayIndex(AII))
-        return nullptr;
-    }
-
-    return CXXCtorInitializer::Create(
-        ToContext, ToField, Import(From->getMemberLocation()),
-        Import(From->getLParenLoc()), ToExpr, Import(From->getRParenLoc()),
-        ToAIs.data(), NumArrayIndices);
-  } else {
-    return nullptr;
-  }
-}
-
-
 void ASTImporter::ImportDefinition(Decl *From) {
   Decl *To = Import(From);
   if (!To)
Index: test/ASTMerge/Inputs/init-ctors-classes.cpp
===================================================================
--- test/ASTMerge/Inputs/init-ctors-classes.cpp
+++ test/ASTMerge/Inputs/init-ctors-classes.cpp
@@ -1,17 +0,0 @@
-class A_base
-{
-public:
-  int x;
-  A_base(int _x) : x(_x) {
-  }
-};
-
-class A : public A_base
-{
-public:
-  int y;
-  struct { int z; };
-  int array[2];
-  A(int _x) : A_base(_x), y(0), z(1), array{{2},{3}} {
-  }
-};
Index: test/ASTMerge/init-ctors.cpp
===================================================================
--- test/ASTMerge/init-ctors.cpp
+++ test/ASTMerge/init-ctors.cpp
@@ -1,10 +0,0 @@
-// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++1z -emit-pch -o %t.1.ast %S/Inputs/init-ctors-classes.cpp
-// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++1z -ast-merge %t.1.ast -fsyntax-only -verify %s
-// expected-no-diagnostics
-
-class B {
-  int method_1() {
-    A a(0);
-    return a.x;
-  }
-};