Move InterlockedBitTestAndSet into its own test file

[• ehsan]

Summary

This gives us back the test coverage we lost when I made
MicrosoftExtensions.c x86-only.

[majnemer]

LGTM

[• ehsan]

Closed by commit rL212414 (authored by @ehsan).

cfe/trunk/test/Parser/MicrosoftExtensions.c

-// REQUIRES: x86-registered-target
 // RUN: %clang_cc1 -triple i386-mingw32 -fsyntax-only -verify -fms-extensions  -Wno-missing-declarations -x objective-c++ %s
 __stdcall int func0();
 int __stdcall func();
 typedef int (__cdecl *tptr)();
 void (*__fastcall fastpfunc)();
 struct __declspec(uuid("00000000-0000-0000-C000-000000000046")) __declspec(novtable) IUnknown {}; /* expected-warning{{__declspec attribute 'novtable' is not supported}} */
 extern __declspec(dllimport) void __stdcall VarR4FromDec();
 __declspec(deprecated) __declspec(deprecated) char * __cdecl ltoa( long _Val, char * _DstBuf, int _Radix);
 __declspec(safebuffers) __declspec(noalias) __declspec(restrict) void * __cdecl xxx( void * _Memory ); /* expected-warning{{__declspec attribute 'safebuffers' is not supported}} expected-warning{{__declspec attribute 'noalias' is not supported}} expected-warning{{__declspec attribute 'restrict' is not supported}} */
 typedef __w64 unsigned long ULONG_PTR, *PULONG_PTR;
 
 void * __ptr64 PtrToPtr64(const void *p)
 {
   return((void * __ptr64) (unsigned __int64) (ULONG_PTR)p );
 }
 void * __ptr32 PtrToPtr32(const void *p)
 {
   return((void * __ptr32) (unsigned __int32) (ULONG_PTR)p );
 }
 
-void __forceinline InterlockedBitTestAndSet (long *Base, long Bit)
-{
-  __asm {
-    mov eax, Bit
-    mov ecx, Base
-    lock bts [ecx], eax
-    setc al
-  };
-}
-
 // Both inline and __forceinline is OK.
 inline void __forceinline pr8264() {
 }
 __forceinline void inline pr8264_1() {
 }
 void inline __forceinline pr8264_2() {
 }
 void __forceinline inline pr8264_3() {

cfe/trunk/test/Parser/MicrosoftExtensionsInlineAsm.c

+// REQUIRES: x86-registered-target
+// RUN: %clang_cc1 -triple i386-mingw32 -fsyntax-only -verify -fms-extensions  -Wno-missing-declarations -x objective-c++ %s
+// expected-no-diagnostics
+
+void __forceinline InterlockedBitTestAndSet (long *Base, long Bit)
+{
+  __asm {
+    mov eax, Bit
+    mov ecx, Base
+    lock bts [ecx], eax
+    setc al
+  };
+}