Index: test/CodeGenObjC/arc.m
===================================================================
--- test/CodeGenObjC/arc.m	(revision 162401)
+++ test/CodeGenObjC/arc.m	(working copy)
@@ -1358,9 +1358,9 @@
   // CHECK:    define void @test59()
   // CHECK:      [[T0:%.*]] = call i8* @test59_getlock()
   // CHECK-NEXT: [[T1:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T0]])
-  // CHECK-NEXT: call void @objc_sync_enter(i8* [[T1]])
+  // CHECK-NEXT: call i32 @objc_sync_enter(i8* [[T1]])
   // CHECK-NEXT: call void @test59_body()
-  // CHECK-NEXT: call void @objc_sync_exit(i8* [[T1]])
+  // CHECK-NEXT: call i32 @objc_sync_exit(i8* [[T1]])
   // CHECK-NEXT: call void @objc_release(i8* [[T1]])
   // CHECK-NEXT: ret void
 }
Index: test/CodeGenObjC/synchronized.m
===================================================================
--- test/CodeGenObjC/synchronized.m	(revision 162401)
+++ test/CodeGenObjC/synchronized.m	(working copy)
@@ -11,7 +11,7 @@
 // CHECK: define internal void @"\01-[MyClass method]"
 - (void)method
 {
-  // CHECK: call void @objc_sync_enter
+  // CHECK: call i32 @objc_sync_enter
   // CHECK: call void @objc_exception_try_enter
   // CHECK: call i32 @_setjmp
   @synchronized(self) {
@@ -26,21 +26,21 @@
   // CHECK: [[SYNC:%.*]] = alloca i8*
 
   // CHECK:      store i8* [[AVAL:%.*]], i8** [[A]]
-  // CHECK-NEXT: call void @objc_sync_enter(i8* [[AVAL]])
+  // CHECK-NEXT: call i32 @objc_sync_enter(i8* [[AVAL]])
   // CHECK-NEXT: store i8* [[AVAL]], i8** [[SYNC]]
   // CHECK-NEXT: call void @objc_exception_try_enter
   // CHECK:      call i32 @_setjmp
   @synchronized(a) {
     // This is unreachable, but the optimizers can't know that.
     // CHECK: call void asm sideeffect "", "=*m,=*m,=*m"(i8** [[A]], i8** [[SYNC]]
-    // CHECK: call void @objc_sync_exit
+    // CHECK: call i32 @objc_sync_exit
     // CHECK: call i8* @objc_exception_extract
     // CHECK: call void @objc_exception_throw
     // CHECK: unreachable
 
     // CHECK:      call void @objc_exception_try_exit
     // CHECK:      [[T:%.*]] = load i8** [[SYNC]]
-    // CHECK-NEXT: call void @objc_sync_exit
+    // CHECK-NEXT: call i32 @objc_sync_exit
     // CHECK: ret void
     return;
   }
Index: lib/CodeGen/CGObjCMac.cpp
===================================================================
--- lib/CodeGen/CGObjCMac.cpp	(revision 162401)
+++ lib/CodeGen/CGObjCMac.cpp	(working copy)
@@ -433,19 +433,19 @@
   
   /// SyncEnterFn - LLVM object_sync_enter function.
   llvm::Constant *getSyncEnterFn() {
-    // void objc_sync_enter (id)
+    // int objc_sync_enter (id)
     llvm::Type *args[] = { ObjectPtrTy };
     llvm::FunctionType *FTy =
-      llvm::FunctionType::get(CGM.VoidTy, args, false);
+      llvm::FunctionType::get(CGM.IntTy, args, false);
     return CGM.CreateRuntimeFunction(FTy, "objc_sync_enter");
   }
 
   /// SyncExitFn - LLVM object_sync_exit function.
   llvm::Constant *getSyncExitFn() {
-    // void objc_sync_exit (id)
+    // int objc_sync_exit (id)
     llvm::Type *args[] = { ObjectPtrTy };
     llvm::FunctionType *FTy =
-      llvm::FunctionType::get(CGM.VoidTy, args, false);
+      llvm::FunctionType::get(CGM.IntTy, args, false);
     return CGM.CreateRuntimeFunction(FTy, "objc_sync_exit");
   }