diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index 88f2b71f187..06ad1465385 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -773,14 +773,6 @@ MCStreamer *createMachOStreamer(MCContext &Ctx, MCAsmBackend &TAB,
                                 bool RelaxAll = false,
                                 bool LabelSections = false);
 
-/// createWinCOFFStreamer - Create a machine code streamer which will
-/// generate Microsoft COFF format object files.
-///
-/// Takes ownership of \p TAB and \p CE.
-MCStreamer *createWinCOFFStreamer(MCContext &Ctx, MCAsmBackend &TAB,
-                                  MCCodeEmitter &CE, raw_ostream &OS,
-                                  bool RelaxAll = false);
-
 /// createELFStreamer - Create a machine code streamer which will generate
 /// ELF format object files.
 MCStreamer *createELFStreamer(MCContext &Ctx, MCAsmBackend &TAB,
diff --git a/lib/MC/WinCOFFStreamer.cpp b/lib/MC/WinCOFFStreamer.cpp
index 2d8ca7eb371..ec81dff0c34 100644
--- a/lib/MC/WinCOFFStreamer.cpp
+++ b/lib/MC/WinCOFFStreamer.cpp
@@ -233,29 +233,15 @@ void MCWinCOFFStreamer::EmitIdent(StringRef IdentString) {
 }
 
 void MCWinCOFFStreamer::EmitWin64EHHandlerData() {
-  MCStreamer::EmitWin64EHHandlerData();
-
-  // We have to emit the unwind info now, because this directive
-  // actually switches to the .xdata section!
-  MCWin64EHUnwindEmitter::EmitUnwindInfo(*this, getCurrentW64UnwindInfo());
+  llvm_unreachable("not implemented");
 }
 
 void MCWinCOFFStreamer::FinishImpl() {
-  EmitFrames(nullptr, true);
-  EmitW64Tables();
   MCObjectStreamer::FinishImpl();
 }
 
 MCSymbolData &MCWinCOFFStreamer::getOrCreateSymbolData(const MCSymbol *Symbol) {
   return getAssembler().getOrCreateSymbolData(*Symbol);
 }
-
-MCStreamer *createWinCOFFStreamer(MCContext &Context, MCAsmBackend &MAB,
-                                  MCCodeEmitter &CE, raw_ostream &OS,
-                                  bool RelaxAll) {
-  MCWinCOFFStreamer *S = new MCWinCOFFStreamer(Context, MAB, CE, OS);
-  S->getAssembler().setRelaxAll(RelaxAll);
-  return S;
-}
 }
 
diff --git a/lib/Target/X86/MCTargetDesc/CMakeLists.txt b/lib/Target/X86/MCTargetDesc/CMakeLists.txt
index 3f5a0e2bafb..129c28d804e 100644
--- a/lib/Target/X86/MCTargetDesc/CMakeLists.txt
+++ b/lib/Target/X86/MCTargetDesc/CMakeLists.txt
@@ -5,6 +5,7 @@ add_llvm_library(LLVMX86Desc
   X86MCCodeEmitter.cpp
   X86MachObjectWriter.cpp
   X86ELFObjectWriter.cpp
+  X86WinCOFFStreamer.cpp
   X86WinCOFFObjectWriter.cpp
   X86MachORelocationInfo.cpp
   X86ELFRelocationInfo.cpp
diff --git a/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp b/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
index fdc234d211c..e63036c1a55 100644
--- a/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
+++ b/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
@@ -364,7 +364,7 @@ static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
     return createMachOStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll);
   case Triple::COFF:
     assert(TheTriple.isOSWindows() && "only Windows COFF is supported");
-    return createWinCOFFStreamer(Ctx, MAB, *_Emitter, _OS, RelaxAll);
+    return createX86WinCOFFStreamer(Ctx, MAB, _Emitter, _OS, RelaxAll);
   case Triple::ELF:
     return createELFStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll, NoExecStack);
   }
diff --git a/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.h b/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.h
index 41ae4354cbf..8fe40fd2362 100644
--- a/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.h
+++ b/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.h
@@ -26,6 +26,7 @@ class MCObjectWriter;
 class MCRegisterInfo;
 class MCSubtargetInfo;
 class MCRelocationInfo;
+class MCStreamer;
 class Target;
 class StringRef;
 class raw_ostream;
@@ -84,6 +85,14 @@ MCAsmBackend *createX86_32AsmBackend(const Target &T, const MCRegisterInfo &MRI,
 MCAsmBackend *createX86_64AsmBackend(const Target &T, const MCRegisterInfo &MRI,
                                      StringRef TT, StringRef CPU);
 
+/// createX86WinCOFFStreamer - Construct an X86 Windows COFF machine code
+/// streamer which will generate PE/COFF format object files.
+///
+/// Takes ownership of \p AB and \p CE.
+MCStreamer *createX86WinCOFFStreamer(MCContext &C, MCAsmBackend &AB,
+                                     MCCodeEmitter *CE, raw_ostream &OS,
+                                     bool RelaxAll);
+
 /// createX86MachObjectWriter - Construct an X86 Mach-O object writer.
 MCObjectWriter *createX86MachObjectWriter(raw_ostream &OS,
                                           bool Is64Bit,
diff --git a/lib/Target/X86/MCTargetDesc/X86WinCOFFStreamer.cpp b/lib/Target/X86/MCTargetDesc/X86WinCOFFStreamer.cpp
new file mode 100644
index 00000000000..526868487a0
--- /dev/null
+++ b/lib/Target/X86/MCTargetDesc/X86WinCOFFStreamer.cpp
@@ -0,0 +1,51 @@
+//===-- X86WinCOFFStreamer.cpp - X86 Target WinCOFF Streamer ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86MCTargetDesc.h"
+#include "llvm/MC/MCWinCOFFStreamer.h"
+
+using namespace llvm;
+
+namespace {
+class X86WinCOFFStreamer : public MCWinCOFFStreamer {
+public:
+  X86WinCOFFStreamer(MCContext &C, MCAsmBackend &AB, MCCodeEmitter *CE,
+                     raw_ostream &OS)
+    : MCWinCOFFStreamer(C, AB, *CE, OS) { }
+
+  void EmitWin64EHHandlerData() override;
+  void FinishImpl() override;
+};
+
+void X86WinCOFFStreamer::EmitWin64EHHandlerData() {
+  MCStreamer::EmitWin64EHHandlerData();
+
+  // We have to emit the unwind info now, because this directive
+  // actually switches to the .xdata section!
+  MCWin64EHUnwindEmitter::EmitUnwindInfo(*this, getCurrentW64UnwindInfo());
+}
+
+void X86WinCOFFStreamer::FinishImpl() {
+  EmitFrames(nullptr, true);
+  EmitW64Tables();
+
+  MCWinCOFFStreamer::FinishImpl();
+}
+}
+
+namespace llvm {
+MCStreamer *createX86WinCOFFStreamer(MCContext &C, MCAsmBackend &AB,
+                                     MCCodeEmitter *CE, raw_ostream &OS,
+                                     bool RelaxAll) {
+  X86WinCOFFStreamer *S = new X86WinCOFFStreamer(C, AB, CE, OS);
+  S->getAssembler().setRelaxAll(RelaxAll);
+  return S;
+}
+}
+