diff --git a/clang/lib/CodeGen/CGCXXABI.h b/clang/lib/CodeGen/CGCXXABI.h
--- a/clang/lib/CodeGen/CGCXXABI.h
+++ b/clang/lib/CodeGen/CGCXXABI.h
@@ -209,6 +209,12 @@
                              llvm::Value *MemPtr,
                              const MemberPointerType *MPT);
 
+  /// Create and set the initializer for the vtable.
+  virtual void SetVTableInitializer(CodeGenVTables &CGVT,
+                                    llvm::GlobalVariable *VTable,
+                                    const VTableLayout &VTLayout,
+                                    llvm::Constant *RTTI);
+
 protected:
   /// A utility method for computing the offset required for the given
   /// base-to-derived or derived-to-base member-pointer conversion.
diff --git a/clang/lib/CodeGen/CGCXXABI.cpp b/clang/lib/CodeGen/CGCXXABI.cpp
--- a/clang/lib/CodeGen/CGCXXABI.cpp
+++ b/clang/lib/CodeGen/CGCXXABI.cpp
@@ -14,6 +14,7 @@
 #include "CGCXXABI.h"
 #include "CGCleanup.h"
 #include "clang/AST/Attr.h"
+#include "clang/CodeGen/ConstantInitBuilder.h"
 
 using namespace clang;
 using namespace CodeGen;
@@ -95,6 +96,16 @@
   return CGF.Builder.getFalse();
 }
 
+void CGCXXABI::SetVTableInitializer(CodeGenVTables &CGVT,
+                                    llvm::GlobalVariable *VTable,
+                                    const VTableLayout &VTLayout,
+                                    llvm::Constant *RTTI) {
+  ConstantInitBuilder builder(CGM);
+  auto components = builder.beginStruct();
+  CGVT.createVTableInitializer(components, VTLayout, RTTI);
+  components.finishAndSetAsInitializer(VTable);
+}
+
 llvm::Constant *
 CGCXXABI::EmitNullMemberPointer(const MemberPointerType *MPT) {
   return GetBogusMemberPointer(QualType(MPT, 0));
diff --git a/clang/lib/CodeGen/CGVTables.cpp b/clang/lib/CodeGen/CGVTables.cpp
--- a/clang/lib/CodeGen/CGVTables.cpp
+++ b/clang/lib/CodeGen/CGVTables.cpp
@@ -806,10 +806,7 @@
       CGM.getContext().getTagDeclType(Base.getBase()));
 
   // Create and set the initializer.
-  ConstantInitBuilder builder(CGM);
-  auto components = builder.beginStruct();
-  createVTableInitializer(components, *VTLayout, RTTI);
-  components.finishAndSetAsInitializer(VTable);
+  CGM.getCXXABI().SetVTableInitializer(*this, VTable, *VTLayout, RTTI);
 
   // Set properties only after the initializer has been set to ensure that the
   // GV is treated as definition and not declaration.
diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -493,6 +493,20 @@
   explicit FuchsiaCXXABI(CodeGen::CodeGenModule &CGM)
       : ItaniumCXXABI(CGM) {}
 
+  void SetVTableInitializer(CodeGenVTables &CGVT, llvm::GlobalVariable *VTable,
+                            const VTableLayout &VTLayout,
+                            llvm::Constant *RTTI) override {
+    ConstantInitBuilder builder(CGM);
+    auto components = builder.beginStruct();
+
+    // TODO: Replace this with CodeGenVTables::createRelativeVTableInitializer()
+    // once it is implemented. This will be the helper for the relative-vtables
+    // ABI.
+    CGVT.createVTableInitializer(components, VTLayout, RTTI);
+
+    components.finishAndSetAsInitializer(VTable);
+  }
+
 private:
   bool HasThisReturn(GlobalDecl GD) const override {
     return isa<CXXConstructorDecl>(GD.getDecl()) ||
@@ -1679,10 +1693,7 @@
       CGM.GetAddrOfRTTIDescriptor(CGM.getContext().getTagDeclType(RD));
 
   // Create and set the initializer.
-  ConstantInitBuilder Builder(CGM);
-  auto Components = Builder.beginStruct();
-  CGVT.createVTableInitializer(Components, VTLayout, RTTI);
-  Components.finishAndSetAsInitializer(VTable);
+  SetVTableInitializer(CGVT, VTable, VTLayout, RTTI);
 
   // Set the correct linkage.
   VTable->setLinkage(Linkage);
diff --git a/clang/lib/CodeGen/MicrosoftCXXABI.cpp b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
--- a/clang/lib/CodeGen/MicrosoftCXXABI.cpp
+++ b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
@@ -1690,10 +1690,7 @@
                [](const VTableComponent &VTC) { return VTC.isRTTIKind(); }))
       RTTI = getMSCompleteObjectLocator(RD, *Info);
 
-    ConstantInitBuilder Builder(CGM);
-    auto Components = Builder.beginStruct();
-    CGVT.createVTableInitializer(Components, VTLayout, RTTI);
-    Components.finishAndSetAsInitializer(VTable);
+    SetVTableInitializer(CGVT, VTable, VTLayout, RTTI);
 
     emitVTableTypeMetadata(*Info, RD, VTable);
   }