Index: include/clang/Basic/BuiltinsAArch64.def
===================================================================
--- include/clang/Basic/BuiltinsAArch64.def
+++ include/clang/Basic/BuiltinsAArch64.def
@@ -32,7 +32,7 @@
 
 // Bit manipulation
 BUILTIN(__builtin_arm_rbit, "UiUi", "nc")
-BUILTIN(__builtin_arm_rbit64, "LUiLUi", "nc")
+BUILTIN(__builtin_arm_rbit64, "WUiWUi", "nc")
 
 // HINT
 BUILTIN(__builtin_arm_nop, "v", "")
@@ -49,8 +49,8 @@
 BUILTIN(__builtin_arm_crc32ch, "UiUiUs", "nc")
 BUILTIN(__builtin_arm_crc32w, "UiUiUi", "nc")
 BUILTIN(__builtin_arm_crc32cw, "UiUiUi", "nc")
-BUILTIN(__builtin_arm_crc32d, "UiUiLUi", "nc")
-BUILTIN(__builtin_arm_crc32cd, "UiUiLUi", "nc")
+BUILTIN(__builtin_arm_crc32d, "UiUiWUi", "nc")
+BUILTIN(__builtin_arm_crc32cd, "UiUiWUi", "nc")
 
 // Memory barrier
 BUILTIN(__builtin_arm_dmb, "vUi", "nc")
@@ -62,10 +62,10 @@
 
 // System Registers
 BUILTIN(__builtin_arm_rsr, "UicC*", "nc")
-BUILTIN(__builtin_arm_rsr64, "LUicC*", "nc")
+BUILTIN(__builtin_arm_rsr64, "WUicC*", "nc")
 BUILTIN(__builtin_arm_rsrp, "v*cC*", "nc")
 BUILTIN(__builtin_arm_wsr, "vcC*Ui", "nc")
-BUILTIN(__builtin_arm_wsr64, "vcC*LUi", "nc")
+BUILTIN(__builtin_arm_wsr64, "vcC*WUi", "nc")
 BUILTIN(__builtin_arm_wsrp, "vcC*vC*", "nc")
 
 // MSVC
Index: test/CodeGen/arm64-crc32.c
===================================================================
--- test/CodeGen/arm64-crc32.c
+++ test/CodeGen/arm64-crc32.c
@@ -1,54 +1,57 @@
 // REQUIRES: aarch64-registered-target
 // RUN: %clang_cc1 -triple arm64-none-linux-gnu \
 // RUN:  -disable-O0-optnone -S -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-windows \
+// RUN:  -disable-O0-optnone -S -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s
+#include <stdint.h>
 
-int crc32b(int a, char b)
+uint32_t crc32b(uint32_t a, uint8_t b)
 {
         return __builtin_arm_crc32b(a,b);
 // CHECK: [[T0:%[0-9]+]] = zext i8 %b to i32
 // CHECK: call i32 @llvm.aarch64.crc32b(i32 %a, i32 [[T0]])
 }
 
-int crc32cb(int a, char b)
+uint32_t crc32cb(uint32_t a, uint8_t b)
 {
         return __builtin_arm_crc32cb(a,b);
 // CHECK: [[T0:%[0-9]+]] = zext i8 %b to i32
 // CHECK: call i32 @llvm.aarch64.crc32cb(i32 %a, i32 [[T0]])
 }
 
-int crc32h(int a, short b)
+uint32_t crc32h(uint32_t a, uint16_t b)
 {
         return __builtin_arm_crc32h(a,b);
 // CHECK: [[T0:%[0-9]+]] = zext i16 %b to i32
 // CHECK: call i32 @llvm.aarch64.crc32h(i32 %a, i32 [[T0]])
 }
 
-int crc32ch(int a, short b)
+uint32_t crc32ch(uint32_t a, uint16_t b)
 {
         return __builtin_arm_crc32ch(a,b);
 // CHECK: [[T0:%[0-9]+]] = zext i16 %b to i32
 // CHECK: call i32 @llvm.aarch64.crc32ch(i32 %a, i32 [[T0]])
 }
 
-int crc32w(int a, int b)
+uint32_t crc32w(uint32_t a, uint32_t b)
 {
         return __builtin_arm_crc32w(a,b);
 // CHECK: call i32 @llvm.aarch64.crc32w(i32 %a, i32 %b)
 }
 
-int crc32cw(int a, int b)
+uint32_t crc32cw(uint32_t a, uint32_t b)
 {
         return __builtin_arm_crc32cw(a,b);
 // CHECK: call i32 @llvm.aarch64.crc32cw(i32 %a, i32 %b)
 }
 
-int crc32d(int a, long b)
+uint32_t crc32d(uint32_t a, uint64_t b)
 {
         return __builtin_arm_crc32d(a,b);
 // CHECK: call i32 @llvm.aarch64.crc32x(i32 %a, i64 %b)
 }
 
-int crc32cd(int a, long b)
+uint32_t crc32cd(uint32_t a, uint64_t b)
 {
         return __builtin_arm_crc32cd(a,b);
 // CHECK: call i32 @llvm.aarch64.crc32cx(i32 %a, i64 %b)
Index: test/CodeGen/builtins-arm64.c
===================================================================
--- test/CodeGen/builtins-arm64.c
+++ test/CodeGen/builtins-arm64.c
@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -triple arm64-unknown-linux -disable-O0-optnone -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s
+// RUN: %clang_cc1 -triple arm64-unknown-linux -disable-O0-optnone -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-LINUX
+// RUN: %clang_cc1 -triple aarch64-windows -disable-O0-optnone -S -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-WIN
 #include <stdint.h>
 
 void f0(void *a, void *b) {
@@ -16,8 +17,15 @@
   return __builtin_arm_rbit(a);
 }
 
+// CHECK-WIN: [[A64:%[^ ]+]] = zext i32 %a to i64
+// CHECK-WIN: call i64 @llvm.bitreverse.i64(i64 [[A64]])
+// CHECK-LINUX: call i64 @llvm.bitreverse.i64(i64 %a)
+unsigned long rbitl(unsigned long a) {
+  return __builtin_arm_rbit64(a);
+}
+
 // CHECK: call {{.*}} @llvm.bitreverse.i64(i64 %a)
-unsigned long long rbit64(unsigned long long a) {
+uint64_t rbit64(uint64_t a) {
   return __builtin_arm_rbit64(a);
 }
 
@@ -60,7 +68,7 @@
 
 __typeof__(__builtin_arm_rsr64("1:2:3:4:5")) rsr64(void);
 
-uint64_t rsr64() {
+uint64_t rsr64(void) {
   // CHECK: call i64 @llvm.read_register.i64(metadata ![[M0:[0-9]]])
   return __builtin_arm_rsr64("1:2:3:4:5");
 }
@@ -71,13 +79,17 @@
   return __builtin_arm_rsrp("1:2:3:4:5");
 }
 
+__typeof__(__builtin_arm_wsr("1:2:3:4:5", 0)) wsr(unsigned);
+
 void wsr(unsigned v) {
   // CHECK: [[V0:[%A-Za-z0-9.]+]] = zext i32 %v to i64
   // CHECK-NEXT: call void @llvm.write_register.i64(metadata ![[M0:[0-9]]], i64 [[V0]])
   __builtin_arm_wsr("1:2:3:4:5", v);
 }
 
-void wsr64(unsigned long v) {
+__typeof__(__builtin_arm_wsr64("1:2:3:4:5", 0)) wsr64(uint64_t);
+
+void wsr64(uint64_t v) {
   // CHECK: call void @llvm.write_register.i64(metadata ![[M0:[0-9]]], i64 %v)
   __builtin_arm_wsr64("1:2:3:4:5", v);
 }