Index: include/llvm/Target/TargetLowering.h
===================================================================
--- include/llvm/Target/TargetLowering.h
+++ include/llvm/Target/TargetLowering.h
@@ -137,10 +137,10 @@
     llvm_unreachable("Invalid content kind");
   }
 
-  /// NOTE: The constructor takes ownership of TLOF.
+  /// NOTE: The TargetMachine owns TLOF.
   explicit TargetLoweringBase(const TargetMachine &TM,
                               const TargetLoweringObjectFile *TLOF);
-  virtual ~TargetLoweringBase();
+  virtual ~TargetLoweringBase() {}
 
 protected:
   /// \brief Initialize all of the actions to default values.
Index: lib/CodeGen/TargetLoweringBase.cpp
===================================================================
--- lib/CodeGen/TargetLoweringBase.cpp
+++ lib/CodeGen/TargetLoweringBase.cpp
@@ -737,10 +737,6 @@
   InitLibcallCallingConvs(LibcallCallingConvs);
 }
 
-TargetLoweringBase::~TargetLoweringBase() {
-  delete &TLOF;
-}
-
 void TargetLoweringBase::initActions() {
   // All operations default to being supported.
   memset(OpActions, 0, sizeof(OpActions));
Index: lib/Target/X86/X86ISelLowering.cpp
===================================================================
--- lib/Target/X86/X86ISelLowering.cpp
+++ lib/Target/X86/X86ISelLowering.cpp
@@ -193,28 +193,11 @@
   return Insert256BitVector(V, V2, NumElems/2, DAG, dl);
 }
 
-static TargetLoweringObjectFile *createTLOF(const Triple &TT) {
-  if (TT.isOSBinFormatMachO()) {
-    if (TT.getArch() == Triple::x86_64)
-      return new X86_64MachoTargetObjectFile();
-    return new TargetLoweringObjectFileMachO();
-  }
 
-  if (TT.isOSLinux())
-    return new X86LinuxTargetObjectFile();
-  if (TT.isOSBinFormatELF())
-    return new TargetLoweringObjectFileELF();
-  if (TT.isKnownWindowsMSVCEnvironment())
-    return new X86WindowsTargetObjectFile();
-  if (TT.isOSBinFormatCOFF())
-    return new TargetLoweringObjectFileCOFF();
-  llvm_unreachable("unknown subtarget type");
-}
-
 // FIXME: This should stop caching the target machine as soon as
 // we can remove resetOperationActions et al.
 X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM)
-    : TargetLowering(TM, createTLOF(Triple(TM.getTargetTriple()))) {
+    : TargetLowering(TM, TM.getTargetLoweringObjectFile()) {
   Subtarget = &TM.getSubtarget<X86Subtarget>();
   X86ScalarSSEf64 = Subtarget->hasSSE2();
   X86ScalarSSEf32 = Subtarget->hasSSE1();
Index: lib/Target/X86/X86TargetMachine.h
===================================================================
--- lib/Target/X86/X86TargetMachine.h
+++ lib/Target/X86/X86TargetMachine.h
@@ -24,6 +24,7 @@
 
 class X86TargetMachine final : public LLVMTargetMachine {
   virtual void anchor();
+  std::unique_ptr<TargetLoweringObjectFile> TLOF;
   X86Subtarget       Subtarget;
 
   mutable StringMap<std::unique_ptr<X86Subtarget>> SubtargetMap;
@@ -41,6 +42,9 @@
 
   // Set up the pass pipeline.
   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
+  TargetLoweringObjectFile *getTargetLoweringObjectFile() const {
+    return TLOF.get();
+  }
 };
 
 } // End llvm namespace
Index: lib/Target/X86/X86TargetMachine.cpp
===================================================================
--- lib/Target/X86/X86TargetMachine.cpp
+++ lib/Target/X86/X86TargetMachine.cpp
@@ -13,6 +13,7 @@
 
 #include "X86TargetMachine.h"
 #include "X86.h"
+#include "X86TargetObjectFile.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/IR/Function.h"
 #include "llvm/PassManager.h"
@@ -30,6 +31,24 @@
 
 void X86TargetMachine::anchor() { }
 
+static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
+  if (TT.isOSBinFormatMachO()) {
+    if (TT.getArch() == Triple::x86_64)
+      return make_unique<X86_64MachoTargetObjectFile>();
+    return make_unique<TargetLoweringObjectFileMachO>();
+  }
+
+  if (TT.isOSLinux())
+    return make_unique<X86LinuxTargetObjectFile>();
+  if (TT.isOSBinFormatELF())
+    return make_unique<TargetLoweringObjectFileELF>();
+  if (TT.isKnownWindowsMSVCEnvironment())
+    return make_unique<X86WindowsTargetObjectFile>();
+  if (TT.isOSBinFormatCOFF())
+    return make_unique<TargetLoweringObjectFileCOFF>();
+  llvm_unreachable("unknown subtarget type");
+}
+
 /// X86TargetMachine ctor - Create an X86 target.
 ///
 X86TargetMachine::X86TargetMachine(const Target &T, StringRef TT, StringRef CPU,
@@ -37,6 +56,7 @@
                                    Reloc::Model RM, CodeModel::Model CM,
                                    CodeGenOpt::Level OL)
     : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
+      TLOF(createTLOF(Triple(getTargetTriple()))),
       Subtarget(TT, CPU, FS, *this, Options.StackAlignmentOverride) {
   // default to hard float ABI
   if (Options.FloatABIType == FloatABI::Default)