[RenderScript] Use LLVM DWARF language enum

[EwanCrawford]

Summary

A DWARF language vender extension for RenderScript was added to LLVM in r259348(http://reviews.llvm.org/D16409)
We should use this generated enum instead of the hardcoded value.

RenderScript is also C99 with some extensions, so when it's detected we should treat it as C.

[clayborg]

See inlined comments.

source/Target/Language.cpp

272 ↗

(On Diff #46520)

Why is this needed? Seems like this is incorrect. Are you trying to ask if a language uses the clang::ASTContext? Please explain why renderscript is C.

[EwanCrawford]

Thanks for taking a look, yes I want to use ClangASTContext.
Although RenderScript is mostly just C99 checking for it in a function called LanguageIsC does seem off.

I've put the comparison directly in ClangASTContextSupportsLanguage(), but let me know if you'd prefer a more generic solution for allowing new languages to use ClangASTContext.

[clayborg]

Yes, the fix above in ClangASTContext.cpp was what I was looking for! Looks good.

lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp

 DWARFCompileUnit::LanguageTypeFromDWARF(uint64_t val) 
 {
     // Note: user languages between lo_user and hi_user
     // must be handled explicitly here.
     switch (val)
     {
     case DW_LANG_Mips_Assembler:
         return eLanguageTypeMipsAssembler;
-    case 0x8e57: // FIXME: needs to be added to llvm
+    case DW_LANG_GOOGLE_RenderScript:
         return eLanguageTypeExtRenderScript;
     default:
         return static_cast<LanguageType>(val);
     }
 }
 
 LanguageType
 DWARFCompileUnit::GetLanguageType()

lldb/trunk/source/Symbol/ClangASTContext.cpp

 
 namespace
 {
     static inline bool ClangASTContextSupportsLanguage (lldb::LanguageType language)
     {
         return language == eLanguageTypeUnknown || // Clang is the default type system
                Language::LanguageIsC (language) ||
                Language::LanguageIsCPlusPlus (language) ||
-               Language::LanguageIsObjC (language);
+               Language::LanguageIsObjC (language) ||
+               language == eLanguageTypeExtRenderScript;
     }
 }
 
 typedef lldb_private::ThreadSafeDenseMap<clang::ASTContext *, ClangASTContext*> ClangASTMap;
 
 static ClangASTMap &
 GetASTMap()
 {