[PATCH] CodeGen: implement __emit intrinsic

[Saleem Abdulrasool]

================
Comment at: lib/Basic/Builtins.cpp:58-61
@@ -57,4 +57,6 @@
                             (BuiltinInfo.builtin_lang & GNU_LANG);
   bool MSModeUnsupported = !LangOpts.MicrosoftExt &&
                            (BuiltinInfo.builtin_lang & MS_LANG);
+  bool MSCompatUnsupported = !LangOpts.MSVCCompat &&
+                             (BuiltinInfo.builtin_lang & MS_MODE);
   bool ObjCUnsupported = !LangOpts.ObjC1 &&
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majnemer wrote:
> `MSModeUnsupported` uses `MS_LANG` and `MSCompatUnsupported` uses `MS_MODE`.  That's a little confusing.
I'm more than happy to rename this to a better name.  Would you prefer MSVC_COMPAT?  MSVC_MODE?  MSC_COMPAT?  MSC_MODE?

http://reviews.llvm.org/D3489