Reserve an identifier flag for Sony/PS keywords

[ygao]

Summary

Hi,
As the title says, this patch reserves a flag for Sony keywords that we will add shortly.

• Gao

[rsmith]

I don't think it makes sense to split this patch from the patch that adds the keywords (and from the corresponding change to enable the keywords when the relevant language extension is enabled).

[ygao]

Fixed.

include/clang/Basic/LangOptions.def

 LANGOPT(CPlusPlus1z       , 1, 0, "C++1z")
 LANGOPT(ObjC1             , 1, 0, "Objective-C 1")
 LANGOPT(ObjC2             , 1, 0, "Objective-C 2")
+LANGOPT(SceExt            , 1, 0, "Sony PlayStation(R) extensions")
 BENIGN_LANGOPT(ObjCDefaultSynthProperties , 1, 0,
                "Objective-C auto-synthesized properties")
 BENIGN_LANGOPT(EncodeExtendedBlockSig , 1, 0,

lib/Basic/IdentifierTable.cpp

     HALFSUPPORT = 0x08000,
     KEYCONCEPTS = 0x10000,
     KEYOBJC2    = 0x20000,
-    KEYALL = (0x3ffff & ~KEYNOMS18 &
+    KEYSCE      = 0x40000,
+    KEYALL = (0x7ffff & ~KEYNOMS18 &
               ~KEYNOOPENCL) // KEYNOMS18 and KEYNOOPENCL are used to exclude.
   };
 

   if (LangOpts.GNUKeywords && (Flags & KEYGNU)) return KS_Extension;
   if (LangOpts.MicrosoftExt && (Flags & KEYMS)) return KS_Extension;
   if (LangOpts.Borland && (Flags & KEYBORLAND)) return KS_Extension;
+  if (LangOpts.SceExt && (Flags & KEYSCE)) return KS_Extension;
   if (LangOpts.Bool && (Flags & BOOLSUPPORT)) return KS_Enabled;
   if (LangOpts.Half && (Flags & HALFSUPPORT)) return KS_Enabled;
   if (LangOpts.WChar && (Flags & WCHARSUPPORT)) return KS_Enabled;