diff --git a/clang/clang/Basic/BuiltinsAArch64.def b/clang/include/clang/Basic/BuiltinsAArch64.def
similarity index 89%
rename from clang/clang/Basic/BuiltinsAArch64.def
rename to clang/include/clang/Basic/BuiltinsAArch64.def
index 693b3335c1be..a8e9ad582650 100644
--- a/clang/clang/Basic/BuiltinsAArch64.def
+++ b/clang/include/clang/Basic/BuiltinsAArch64.def
@@ -156,19 +156,6 @@ TARGET_HEADER_BUILTIN(_InterlockedOr64_acq, "LLiLLiD*LLi", "nh", "intrin.h", ALL
 TARGET_HEADER_BUILTIN(_InterlockedOr64_nf,  "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 TARGET_HEADER_BUILTIN(_InterlockedOr64_rel, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 
-TARGET_HEADER_BUILTIN(_InterlockedXor8_acq,  "ccD*c",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor8_nf,   "ccD*c",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor8_rel,  "ccD*c",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor16_acq, "ssD*s",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor16_nf,  "ssD*s",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor16_rel, "ssD*s",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor_acq,   "LiLiD*Li",    "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor_nf,    "LiLiD*Li",    "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor_rel,   "LiLiD*Li",    "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor64_acq, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor64_nf,  "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor64_rel, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-
 TARGET_HEADER_BUILTIN(_ReadWriteBarrier, "v", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 TARGET_HEADER_BUILTIN(__getReg, "ULLii", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 TARGET_HEADER_BUILTIN(_ReadStatusReg,  "ii",  "nh", "intrin.h", ALL_MS_LANGUAGES, "")
diff --git a/clang/clang/Basic/BuiltinsARM.def b/clang/include/clang/Basic/BuiltinsARM.def
similarity index 92%
rename from clang/clang/Basic/BuiltinsARM.def
rename to clang/include/clang/Basic/BuiltinsARM.def
index 8a8af1a99527..af3b15a24c16 100644
--- a/clang/clang/Basic/BuiltinsARM.def
+++ b/clang/include/clang/Basic/BuiltinsARM.def
@@ -282,19 +282,6 @@ TARGET_HEADER_BUILTIN(_InterlockedOr64_acq, "LLiLLiD*LLi", "nh", "intrin.h", ALL
 TARGET_HEADER_BUILTIN(_InterlockedOr64_nf,  "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 TARGET_HEADER_BUILTIN(_InterlockedOr64_rel, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 
-TARGET_HEADER_BUILTIN(_InterlockedXor8_acq,  "ccD*c",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor8_nf,   "ccD*c",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor8_rel,  "ccD*c",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor16_acq, "ssD*s",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor16_nf,  "ssD*s",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor16_rel, "ssD*s",       "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor_acq,   "LiLiD*Li",    "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor_nf,    "LiLiD*Li",    "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor_rel,   "LiLiD*Li",    "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor64_acq, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor64_nf,  "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-TARGET_HEADER_BUILTIN(_InterlockedXor64_rel, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
-
 #undef BUILTIN
 #undef LANGBUILTIN
 #undef TARGET_HEADER_BUILTIN
diff --git a/clang/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
similarity index 99%
rename from clang/CodeGen/CGBuiltin.cpp
rename to clang/lib/CodeGen/CGBuiltin.cpp
index 452a43eb544d..acbab70b8f02 100644
--- a/clang/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -802,9 +802,6 @@ enum class CodeGenFunction::MSVCIntrin {
   _InterlockedOr_acq,
   _InterlockedOr_rel,
   _InterlockedOr_nf,
-  _InterlockedXor_acq,
-  _InterlockedXor_rel,
-  _InterlockedXor_nf,
   __fastfail,
 };
 
@@ -904,15 +901,6 @@ Value *CodeGenFunction::EmitMSVCBuiltinExpr(MSVCIntrin BuiltinID,
   case MSVCIntrin::_InterlockedOr_nf:
     return MakeBinaryAtomicValue(*this, AtomicRMWInst::Or, E,
                                  AtomicOrdering::Monotonic);
-  case MSVCIntrin::_InterlockedXor_acq:
-    return MakeBinaryAtomicValue(*this, AtomicRMWInst::Xor, E,
-                                 AtomicOrdering::Acquire);
-  case MSVCIntrin::_InterlockedXor_rel:
-    return MakeBinaryAtomicValue(*this, AtomicRMWInst::Xor, E,
-                                 AtomicOrdering::Release);
-  case MSVCIntrin::_InterlockedXor_nf:
-    return MakeBinaryAtomicValue(*this, AtomicRMWInst::Xor, E,
-                                 AtomicOrdering::Monotonic);
 
   case MSVCIntrin::_InterlockedDecrement: {
     llvm::Type *IntTy = ConvertType(E->getType());
@@ -6256,21 +6244,6 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID,
   case ARM::BI_InterlockedOr_nf:
   case ARM::BI_InterlockedOr64_nf:
     return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedOr_nf, E);
-  case ARM::BI_InterlockedXor8_acq:
-  case ARM::BI_InterlockedXor16_acq:
-  case ARM::BI_InterlockedXor_acq:
-  case ARM::BI_InterlockedXor64_acq:
-    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedXor_acq, E);
-  case ARM::BI_InterlockedXor8_rel:
-  case ARM::BI_InterlockedXor16_rel:
-  case ARM::BI_InterlockedXor_rel:
-  case ARM::BI_InterlockedXor64_rel:
-    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedXor_rel, E);
-  case ARM::BI_InterlockedXor8_nf:
-  case ARM::BI_InterlockedXor16_nf:
-  case ARM::BI_InterlockedXor_nf:
-  case ARM::BI_InterlockedXor64_nf:
-    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedXor_nf, E);
   }
 
   // Get the last argument, which specifies the vector type.
@@ -8817,21 +8790,6 @@ Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID,
   case AArch64::BI_InterlockedOr_nf:
   case AArch64::BI_InterlockedOr64_nf:
     return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedOr_nf, E);
-  case AArch64::BI_InterlockedXor8_acq:
-  case AArch64::BI_InterlockedXor16_acq:
-  case AArch64::BI_InterlockedXor_acq:
-  case AArch64::BI_InterlockedXor64_acq:
-    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedXor_acq, E);
-  case AArch64::BI_InterlockedXor8_rel:
-  case AArch64::BI_InterlockedXor16_rel:
-  case AArch64::BI_InterlockedXor_rel:
-  case AArch64::BI_InterlockedXor64_rel:
-    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedXor_rel, E);
-  case AArch64::BI_InterlockedXor8_nf:
-  case AArch64::BI_InterlockedXor16_nf:
-  case AArch64::BI_InterlockedXor_nf:
-  case AArch64::BI_InterlockedXor64_nf:
-    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedXor_nf, E);
 
   case AArch64::BI_InterlockedAdd: {
     Value *Arg0 = EmitScalarExpr(E->getArg(0));
diff --git a/clang/Headers/intrin.h b/clang/lib/Headers/intrin.h
similarity index 93%
rename from clang/Headers/intrin.h
rename to clang/lib/Headers/intrin.h
index 1b07f57828e7..5b6911f7e357 100644
--- a/clang/Headers/intrin.h
+++ b/clang/lib/Headers/intrin.h
@@ -515,18 +515,54 @@ __int64 _InterlockedOr64_rel(__int64 volatile *_Value, __int64 _Mask);
 |* Interlocked Xor
 \*----------------------------------------------------------------------------*/
 #if defined(__arm__) || defined(__aarch64__)
-char _InterlockedXor8_acq(char volatile *_Value, char _Mask);
-char _InterlockedXor8_nf(char volatile *_Value, char _Mask);
-char _InterlockedXor8_rel(char volatile *_Value, char _Mask);
-short _InterlockedXor16_acq(short volatile *_Value, short _Mask);
-short _InterlockedXor16_nf(short volatile *_Value, short _Mask);
-short _InterlockedXor16_rel(short volatile *_Value, short _Mask);
-long _InterlockedXor_acq(long volatile *_Value, long _Mask);
-long _InterlockedXor_nf(long volatile *_Value, long _Mask);
-long _InterlockedXor_rel(long volatile *_Value, long _Mask);
-__int64 _InterlockedXor64_acq(__int64 volatile *_Value, __int64 _Mask);
-__int64 _InterlockedXor64_nf(__int64 volatile *_Value, __int64 _Mask);
-__int64 _InterlockedXor64_rel(__int64 volatile *_Value, __int64 _Mask);
+static __inline__ char __DEFAULT_FN_ATTRS
+_InterlockedXor8_acq(char volatile *_Value, char _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_ACQUIRE);
+}
+static __inline__ char __DEFAULT_FN_ATTRS
+_InterlockedXor8_nf(char volatile *_Value, char _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_RELAXED);
+}
+static __inline__ char __DEFAULT_FN_ATTRS
+_InterlockedXor8_rel(char volatile *_Value, char _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_RELEASE);
+}
+static __inline__ short __DEFAULT_FN_ATTRS
+_InterlockedXor16_acq(short volatile *_Value, short _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_ACQUIRE);
+}
+static __inline__ short __DEFAULT_FN_ATTRS
+_InterlockedXor16_nf(short volatile *_Value, short _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_RELAXED);
+}
+static __inline__ short __DEFAULT_FN_ATTRS
+_InterlockedXor16_rel(short volatile *_Value, short _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_RELEASE);
+}
+static __inline__ long __DEFAULT_FN_ATTRS
+_InterlockedXor_acq(long volatile *_Value, long _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_ACQUIRE);
+}
+static __inline__ long __DEFAULT_FN_ATTRS
+_InterlockedXor_nf(long volatile *_Value, long _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_RELAXED);
+}
+static __inline__ long __DEFAULT_FN_ATTRS
+_InterlockedXor_rel(long volatile *_Value, long _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_RELEASE);
+}
+static __inline__ __int64 __DEFAULT_FN_ATTRS
+_InterlockedXor64_acq(__int64 volatile *_Value, __int64 _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_ACQUIRE);
+}
+static __inline__ __int64 __DEFAULT_FN_ATTRS
+_InterlockedXor64_nf(__int64 volatile *_Value, __int64 _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_RELAXED);
+}
+static __inline__ __int64 __DEFAULT_FN_ATTRS
+_InterlockedXor64_rel(__int64 volatile *_Value, __int64 _Mask) {
+  return __atomic_fetch_xor(_Value, _Mask, __ATOMIC_RELEASE);
+}
 #endif
 /*----------------------------------------------------------------------------*\
 |* Interlocked Exchange
diff --git a/clang/CodeGen/ms-intrinsics.c b/clang/test/CodeGen/ms-intrinsics.c
similarity index 92%
rename from clang/CodeGen/ms-intrinsics.c
rename to clang/test/CodeGen/ms-intrinsics.c
index 6e4568f179cc..09dcf9b087a4 100644
--- a/clang/CodeGen/ms-intrinsics.c
+++ b/clang/test/CodeGen/ms-intrinsics.c
@@ -986,102 +986,6 @@ __int64 test_InterlockedOr64_nf(__int64 volatile *value, __int64 mask) {
 // CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw or i64* %value, i64 %mask monotonic
 // CHECK-ARM-ARM64:   ret i64 [[RESULT:%[0-9]+]]
 // CHECK-ARM-ARM64: }
-
-char test_InterlockedXor8_acq(char volatile *value, char mask) {
-  return _InterlockedXor8_acq(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i8 @test_InterlockedXor8_acq(i8*{{[a-z_ ]*}}%value, i8{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i8* %value, i8 %mask acquire
-// CHECK-ARM-ARM64:   ret i8 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-char test_InterlockedXor8_rel(char volatile *value, char mask) {
-  return _InterlockedXor8_rel(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i8 @test_InterlockedXor8_rel(i8*{{[a-z_ ]*}}%value, i8{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i8* %value, i8 %mask release
-// CHECK-ARM-ARM64:   ret i8 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-char test_InterlockedXor8_nf(char volatile *value, char mask) {
-  return _InterlockedXor8_nf(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i8 @test_InterlockedXor8_nf(i8*{{[a-z_ ]*}}%value, i8{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i8* %value, i8 %mask monotonic
-// CHECK-ARM-ARM64:   ret i8 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-short test_InterlockedXor16_acq(short volatile *value, short mask) {
-  return _InterlockedXor16_acq(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i16 @test_InterlockedXor16_acq(i16*{{[a-z_ ]*}}%value, i16{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i16* %value, i16 %mask acquire
-// CHECK-ARM-ARM64:   ret i16 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-short test_InterlockedXor16_rel(short volatile *value, short mask) {
-  return _InterlockedXor16_rel(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i16 @test_InterlockedXor16_rel(i16*{{[a-z_ ]*}}%value, i16{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i16* %value, i16 %mask release
-// CHECK-ARM-ARM64:   ret i16 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-short test_InterlockedXor16_nf(short volatile *value, short mask) {
-  return _InterlockedXor16_nf(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i16 @test_InterlockedXor16_nf(i16*{{[a-z_ ]*}}%value, i16{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i16* %value, i16 %mask monotonic
-// CHECK-ARM-ARM64:   ret i16 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-long test_InterlockedXor_acq(long volatile *value, long mask) {
-  return _InterlockedXor_acq(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i32 @test_InterlockedXor_acq(i32*{{[a-z_ ]*}}%value, i32{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i32* %value, i32 %mask acquire
-// CHECK-ARM-ARM64:   ret i32 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-long test_InterlockedXor_rel(long volatile *value, long mask) {
-  return _InterlockedXor_rel(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i32 @test_InterlockedXor_rel(i32*{{[a-z_ ]*}}%value, i32{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i32* %value, i32 %mask release
-// CHECK-ARM-ARM64:   ret i32 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-long test_InterlockedXor_nf(long volatile *value, long mask) {
-  return _InterlockedXor_nf(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i32 @test_InterlockedXor_nf(i32*{{[a-z_ ]*}}%value, i32{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i32* %value, i32 %mask monotonic
-// CHECK-ARM-ARM64:   ret i32 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-__int64 test_InterlockedXor64_acq(__int64 volatile *value, __int64 mask) {
-  return _InterlockedXor64_acq(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i64 @test_InterlockedXor64_acq(i64*{{[a-z_ ]*}}%value, i64{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i64* %value, i64 %mask acquire
-// CHECK-ARM-ARM64:   ret i64 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-__int64 test_InterlockedXor64_rel(__int64 volatile *value, __int64 mask) {
-  return _InterlockedXor64_rel(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i64 @test_InterlockedXor64_rel(i64*{{[a-z_ ]*}}%value, i64{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i64* %value, i64 %mask release
-// CHECK-ARM-ARM64:   ret i64 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
-
-__int64 test_InterlockedXor64_nf(__int64 volatile *value, __int64 mask) {
-  return _InterlockedXor64_nf(value, mask);
-}
-// CHECK-ARM-ARM64: define{{.*}}i64 @test_InterlockedXor64_nf(i64*{{[a-z_ ]*}}%value, i64{{[a-z_ ]*}}%mask){{.*}}{
-// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw xor i64* %value, i64 %mask monotonic
-// CHECK-ARM-ARM64:   ret i64 [[RESULT:%[0-9]+]]
-// CHECK-ARM-ARM64: }
 #endif
 
 #if !defined(__aarch64__)