CodeGenModule.cpp

    Runtime->GenerateClass(OMD);
    break;
  } 
  case Decl::ObjCMethod: {
    ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(D);
    // If this is not a prototype, emit the body.
    if (OMD->getBody())
      CodeGenFunction(*this).GenerateObjCMethod(OMD);
    break;
  }
  case Decl::ObjCCompatibleAlias: 
    ErrorUnsupported(D, "Objective-C compatible alias");
    break;

  case Decl::LinkageSpec: {
    LinkageSpecDecl *LSD = cast<LinkageSpecDecl>(D);
    if (LSD->getLanguage() == LinkageSpecDecl::lang_cxx)
      ErrorUnsupported(LSD, "linkage spec");
    // FIXME: implement C++ linkage, C linkage works mostly by C
    // language reuse already.
    break;
  }

  case Decl::FileScopeAsm: {
    FileScopeAsmDecl *AD = cast<FileScopeAsmDecl>(D);
    std::string AsmString(AD->getAsmString()->getStrData(),
                          AD->getAsmString()->getByteLength());
    
    const std::string &S = getModule().getModuleInlineAsm();
    if (S.empty())
      getModule().setModuleInlineAsm(AsmString);
    else
      getModule().setModuleInlineAsm(S + '\n' + AsmString);
    break;
  }
   
  default: 
    // Make sure we handled everything we should, every other kind is
    // a non-top-level decl.  FIXME: Would be nice to have an
    // isTopLevelDeclKind function. Need to recode Decl::Kind to do
    // that easily.
    assert(isa<TypeDecl>(D) && "Unsupported decl kind");
  }
}