Index: include/clang/Basic/BuiltinsAArch64.def
===================================================================
--- include/clang/Basic/BuiltinsAArch64.def
+++ include/clang/Basic/BuiltinsAArch64.def
@@ -104,6 +104,19 @@
 TARGET_HEADER_BUILTIN(_InterlockedOr64,          "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 TARGET_HEADER_BUILTIN(_InterlockedXor64,         "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd_acq, "LiLiD*Li", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd_rel, "LiLiD*Li", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd_nf, "LiLiD*Li", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd8_acq, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd8_rel, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd8_nf, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd16_acq, "ssD*s", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd16_rel, "ssD*s", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd16_nf, "ssD*s", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd64_acq, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd64_rel, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd64_nf, "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, "")
Index: include/clang/Basic/BuiltinsARM.def
===================================================================
--- include/clang/Basic/BuiltinsARM.def
+++ include/clang/Basic/BuiltinsARM.def
@@ -230,6 +230,19 @@
 TARGET_HEADER_BUILTIN(_InterlockedOr64,          "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 TARGET_HEADER_BUILTIN(_InterlockedXor64,         "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
 
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd_acq, "LiLiD*Li", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd_rel, "LiLiD*Li", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd_nf, "LiLiD*Li", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd8_acq, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd8_rel, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd8_nf, "ccD*c", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd16_acq, "ssD*s", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd16_rel, "ssD*s", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd16_nf, "ssD*s", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd64_acq, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd64_rel, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+TARGET_HEADER_BUILTIN(_InterlockedExchangeAdd64_nf, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
+
 #undef BUILTIN
 #undef LANGBUILTIN
 #undef TARGET_HEADER_BUILTIN
Index: lib/CodeGen/CGBuiltin.cpp
===================================================================
--- lib/CodeGen/CGBuiltin.cpp
+++ lib/CodeGen/CGBuiltin.cpp
@@ -95,9 +95,9 @@
 
 /// Utility to insert an atomic instruction based on Instrinsic::ID
 /// and the expression node.
-static Value *MakeBinaryAtomicValue(CodeGenFunction &CGF,
-                                    llvm::AtomicRMWInst::BinOp Kind,
-                                    const CallExpr *E) {
+static Value *MakeBinaryAtomicValue(
+    CodeGenFunction &CGF, llvm::AtomicRMWInst::BinOp Kind, const CallExpr *E,
+    AtomicOrdering Ordering = AtomicOrdering::SequentiallyConsistent) {
   QualType T = E->getType();
   assert(E->getArg(0)->getType()->isPointerType());
   assert(CGF.getContext().hasSameUnqualifiedType(T,
@@ -119,7 +119,7 @@
   Args[1] = EmitToInt(CGF, Args[1], T, IntType);
 
   llvm::Value *Result = CGF.Builder.CreateAtomicRMW(
-      Kind, Args[0], Args[1], llvm::AtomicOrdering::SequentiallyConsistent);
+      Kind, Args[0], Args[1], Ordering);
   return EmitFromInt(CGF, Result, T, ValueType);
 }
 
@@ -745,6 +745,9 @@
   _InterlockedIncrement,
   _InterlockedOr,
   _InterlockedXor,
+  _InterlockedExchangeAdd_acq,
+  _InterlockedExchangeAdd_rel,
+  _InterlockedExchangeAdd_nf,
   __fastfail,
 };
 
@@ -811,6 +814,15 @@
     return MakeBinaryAtomicValue(*this, AtomicRMWInst::Or, E);
   case MSVCIntrin::_InterlockedXor:
     return MakeBinaryAtomicValue(*this, AtomicRMWInst::Xor, E);
+  case MSVCIntrin::_InterlockedExchangeAdd_acq:
+    return MakeBinaryAtomicValue(*this, AtomicRMWInst::Add, E,
+                                 AtomicOrdering::Acquire);
+  case MSVCIntrin::_InterlockedExchangeAdd_rel:
+    return MakeBinaryAtomicValue(*this, AtomicRMWInst::Add, E,
+                                 AtomicOrdering::Release);
+  case MSVCIntrin::_InterlockedExchangeAdd_nf:
+    return MakeBinaryAtomicValue(*this, AtomicRMWInst::Add, E,
+                                 AtomicOrdering::Monotonic);
 
   case MSVCIntrin::_InterlockedDecrement: {
     llvm::Type *IntTy = ConvertType(E->getType());
@@ -6109,6 +6121,21 @@
     return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedDecrement, E);
   case ARM::BI_InterlockedIncrement64:
     return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedIncrement, E);
+  case ARM::BI_InterlockedExchangeAdd8_acq:
+  case ARM::BI_InterlockedExchangeAdd16_acq:
+  case ARM::BI_InterlockedExchangeAdd_acq:
+  case ARM::BI_InterlockedExchangeAdd64_acq:
+    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedExchangeAdd_acq, E);
+  case ARM::BI_InterlockedExchangeAdd8_rel:
+  case ARM::BI_InterlockedExchangeAdd16_rel:
+  case ARM::BI_InterlockedExchangeAdd_rel:
+  case ARM::BI_InterlockedExchangeAdd64_rel:
+    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedExchangeAdd_rel, E);
+  case ARM::BI_InterlockedExchangeAdd8_nf:
+  case ARM::BI_InterlockedExchangeAdd16_nf:
+  case ARM::BI_InterlockedExchangeAdd_nf:
+  case ARM::BI_InterlockedExchangeAdd64_nf:
+    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedExchangeAdd_nf, E);
   }
 
   // Get the last argument, which specifies the vector type.
@@ -8590,6 +8617,21 @@
     return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedDecrement, E);
   case AArch64::BI_InterlockedIncrement64:
     return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedIncrement, E);
+  case AArch64::BI_InterlockedExchangeAdd8_acq:
+  case AArch64::BI_InterlockedExchangeAdd16_acq:
+  case AArch64::BI_InterlockedExchangeAdd_acq:
+  case AArch64::BI_InterlockedExchangeAdd64_acq:
+    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedExchangeAdd_acq, E);
+  case AArch64::BI_InterlockedExchangeAdd8_rel:
+  case AArch64::BI_InterlockedExchangeAdd16_rel:
+  case AArch64::BI_InterlockedExchangeAdd_rel:
+  case AArch64::BI_InterlockedExchangeAdd64_rel:
+    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedExchangeAdd_rel, E);
+  case AArch64::BI_InterlockedExchangeAdd8_nf:
+  case AArch64::BI_InterlockedExchangeAdd16_nf:
+  case AArch64::BI_InterlockedExchangeAdd_nf:
+  case AArch64::BI_InterlockedExchangeAdd64_nf:
+    return EmitMSVCBuiltinExpr(MSVCIntrin::_InterlockedExchangeAdd_nf, E);
 
   case AArch64::BI_InterlockedAdd: {
     Value *Arg0 = EmitScalarExpr(E->getArg(0));
Index: lib/Headers/intrin.h
===================================================================
--- lib/Headers/intrin.h
+++ lib/Headers/intrin.h
@@ -329,54 +329,18 @@
 |* Interlocked Exchange Add
 \*----------------------------------------------------------------------------*/
 #if defined(__arm__) || defined(__aarch64__)
-static __inline__ char __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd8_acq(char volatile *_Addend, char _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_ACQUIRE);
-}
-static __inline__ char __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd8_nf(char volatile *_Addend, char _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_RELAXED);
-}
-static __inline__ char __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd8_rel(char volatile *_Addend, char _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_RELAXED);
-}
-static __inline__ short __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd16_acq(short volatile *_Addend, short _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_ACQUIRE);
-}
-static __inline__ short __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd16_nf(short volatile *_Addend, short _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_RELAXED);
-}
-static __inline__ short __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd16_rel(short volatile *_Addend, short _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_RELEASE);
-}
-static __inline__ long __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd_acq(long volatile *_Addend, long _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_ACQUIRE);
-}
-static __inline__ long __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd_nf(long volatile *_Addend, long _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_RELAXED);
-}
-static __inline__ long __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd_rel(long volatile *_Addend, long _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_RELEASE);
-}
-static __inline__ __int64 __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd64_acq(__int64 volatile *_Addend, __int64 _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_ACQUIRE);
-}
-static __inline__ __int64 __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd64_nf(__int64 volatile *_Addend, __int64 _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_RELAXED);
-}
-static __inline__ __int64 __DEFAULT_FN_ATTRS
-_InterlockedExchangeAdd64_rel(__int64 volatile *_Addend, __int64 _Value) {
-  return __atomic_fetch_add(_Addend, _Value, __ATOMIC_RELEASE);
-}
+char _InterlockedExchangeAdd8_acq(char volatile *_Addend, char _Value);
+char _InterlockedExchangeAdd8_nf(char volatile *_Addend, char _Value);
+char _InterlockedExchangeAdd8_rel(char volatile *_Addend, char _Value);
+short _InterlockedExchangeAdd16_acq(short volatile *_Addend, short _Value);
+short _InterlockedExchangeAdd16_nf(short volatile *_Addend, short _Value);
+short _InterlockedExchangeAdd16_rel(short volatile *_Addend, short _Value);
+long _InterlockedExchangeAdd_acq(long volatile *_Addend, long _Value);
+long _InterlockedExchangeAdd_nf(long volatile *_Addend, long _Value);
+long _InterlockedExchangeAdd_rel(long volatile *_Addend, long _Value);
+__int64 _InterlockedExchangeAdd64_acq(__int64 volatile *_Addend, __int64 _Value);
+__int64 _InterlockedExchangeAdd64_nf(__int64 volatile *_Addend, __int64 _Value);
+__int64 _InterlockedExchangeAdd64_rel(__int64 volatile *_Addend, __int64 _Value);
 #endif
 /*----------------------------------------------------------------------------*\
 |* Interlocked Increment
Index: test/CodeGen/ms-intrinsics.c
===================================================================
--- test/CodeGen/ms-intrinsics.c
+++ test/CodeGen/ms-intrinsics.c
@@ -3,13 +3,13 @@
 // RUN:         | FileCheck %s -check-prefixes CHECK,CHECK-I386,CHECK-INTEL
 // RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
 // RUN:         -triple thumbv7--windows -Oz -emit-llvm %s -o - \
-// RUN:         | FileCheck %s --check-prefixes CHECK,CHECK-ARM,CHECK-ARM-X64
+// RUN:         | FileCheck %s --check-prefixes CHECK,CHECK-ARM,CHECK-ARM-ARM64,CHECK-ARM-X64
 // RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
 // RUN:         -triple x86_64--windows -Oz -emit-llvm -target-feature +cx16 %s -o - \
 // RUN:         | FileCheck %s --check-prefixes CHECK,CHECK-X64,CHECK-ARM-X64,CHECK-INTEL
 // RUN: %clang_cc1 -ffreestanding -fms-extensions -fms-compatibility -fms-compatibility-version=17.00 \
 // RUN:         -triple aarch64-windows -Oz -emit-llvm %s -o - \
-// RUN:         | FileCheck %s --check-prefix CHECK-ARM-X64
+// RUN:         | FileCheck %s --check-prefixes CHECK-ARM-ARM64,CHECK-ARM-X64
 
 // intrin.h needs size_t, but -ffreestanding prevents us from getting it from
 // stddef.h.  Work around it with this typedef.
@@ -612,6 +612,94 @@
 }
 #endif
 
+#if defined(__arm__) || defined(__aarch64__)
+char test_InterlockedExchangeAdd8_acq(char volatile *value, char mask) {
+  return _InterlockedExchangeAdd8_acq(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i8 @test_InterlockedExchangeAdd8_acq(i8*{{[a-z_ ]*}}%value, i8{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i8* %value, i8 %mask acquire
+// CHECK-ARM-ARM64:   ret i8 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+char test_InterlockedExchangeAdd8_rel(char volatile *value, char mask) {
+  return _InterlockedExchangeAdd8_rel(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i8 @test_InterlockedExchangeAdd8_rel(i8*{{[a-z_ ]*}}%value, i8{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i8* %value, i8 %mask release
+// CHECK-ARM-ARM64:   ret i8 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+char test_InterlockedExchangeAdd8_nf(char volatile *value, char mask) {
+  return _InterlockedExchangeAdd8_nf(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i8 @test_InterlockedExchangeAdd8_nf(i8*{{[a-z_ ]*}}%value, i8{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i8* %value, i8 %mask monotonic
+// CHECK-ARM-ARM64:   ret i8 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+short test_InterlockedExchangeAdd16_acq(short volatile *value, short mask) {
+  return _InterlockedExchangeAdd16_acq(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i16 @test_InterlockedExchangeAdd16_acq(i16*{{[a-z_ ]*}}%value, i16{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i16* %value, i16 %mask acquire
+// CHECK-ARM-ARM64:   ret i16 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+short test_InterlockedExchangeAdd16_rel(short volatile *value, short mask) {
+  return _InterlockedExchangeAdd16_rel(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i16 @test_InterlockedExchangeAdd16_rel(i16*{{[a-z_ ]*}}%value, i16{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i16* %value, i16 %mask release
+// CHECK-ARM-ARM64:   ret i16 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+short test_InterlockedExchangeAdd16_nf(short volatile *value, short mask) {
+  return _InterlockedExchangeAdd16_nf(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i16 @test_InterlockedExchangeAdd16_nf(i16*{{[a-z_ ]*}}%value, i16{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i16* %value, i16 %mask monotonic
+// CHECK-ARM-ARM64:   ret i16 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+long test_InterlockedExchangeAdd_acq(long volatile *value, long mask) {
+  return _InterlockedExchangeAdd_acq(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i32 @test_InterlockedExchangeAdd_acq(i32*{{[a-z_ ]*}}%value, i32{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i32* %value, i32 %mask acquire
+// CHECK-ARM-ARM64:   ret i32 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+long test_InterlockedExchangeAdd_rel(long volatile *value, long mask) {
+  return _InterlockedExchangeAdd_rel(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i32 @test_InterlockedExchangeAdd_rel(i32*{{[a-z_ ]*}}%value, i32{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i32* %value, i32 %mask release
+// CHECK-ARM-ARM64:   ret i32 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+long test_InterlockedExchangeAdd_nf(long volatile *value, long mask) {
+  return _InterlockedExchangeAdd_nf(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i32 @test_InterlockedExchangeAdd_nf(i32*{{[a-z_ ]*}}%value, i32{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i32* %value, i32 %mask monotonic
+// CHECK-ARM-ARM64:   ret i32 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+__int64 test_InterlockedExchangeAdd64_acq(__int64 volatile *value, __int64 mask) {
+  return _InterlockedExchangeAdd64_acq(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i64 @test_InterlockedExchangeAdd64_acq(i64*{{[a-z_ ]*}}%value, i64{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i64* %value, i64 %mask acquire
+// CHECK-ARM-ARM64:   ret i64 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+__int64 test_InterlockedExchangeAdd64_rel(__int64 volatile *value, __int64 mask) {
+  return _InterlockedExchangeAdd64_rel(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i64 @test_InterlockedExchangeAdd64_rel(i64*{{[a-z_ ]*}}%value, i64{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i64* %value, i64 %mask release
+// CHECK-ARM-ARM64:   ret i64 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+__int64 test_InterlockedExchangeAdd64_nf(__int64 volatile *value, __int64 mask) {
+  return _InterlockedExchangeAdd64_nf(value, mask);
+}
+// CHECK-ARM-ARM64: define{{.*}}i64 @test_InterlockedExchangeAdd64_nf(i64*{{[a-z_ ]*}}%value, i64{{[a-z_ ]*}}%mask){{.*}}{
+// CHECK-ARM-ARM64:   [[RESULT:%[0-9]+]] = atomicrmw add i64* %value, i64 %mask monotonic
+// CHECK-ARM-ARM64:   ret i64 [[RESULT:%[0-9]+]]
+// CHECK-ARM-ARM64: }
+
+#endif
+
 #if !defined(__aarch64__)
 void test__fastfail() {
   __fastfail(42);