Add a way to emit StringSwitch of clang attribute spellings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116899 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/TableGen.cpp b/utils/TableGen/TableGen.cpp
index fcf3f74..0bf6460 100644
--- a/utils/TableGen/TableGen.cpp
+++ b/utils/TableGen/TableGen.cpp
@@ -59,6 +59,7 @@
   GenClangAttrList,
   GenClangAttrPCHRead,
   GenClangAttrPCHWrite,
+  GenClangAttrSpellingList,
   GenClangDiagsDefs,
   GenClangDiagGroups,
   GenClangDeclNodes,
@@ -127,6 +128,8 @@
                                "Generate clang PCH attribute reader"),
                     clEnumValN(GenClangAttrPCHWrite, "gen-clang-attr-pch-write",
                                "Generate clang PCH attribute writer"),
+                    clEnumValN(GenClangAttrSpellingList, "gen-clang-attr-spelling-list",
+                               "Generate a clang attribute spelling list"),
                     clEnumValN(GenClangDiagsDefs, "gen-clang-diags-defs",
                                "Generate Clang diagnostics definitions"),
                     clEnumValN(GenClangDiagGroups, "gen-clang-diag-groups",
@@ -274,6 +277,9 @@
     case GenClangAttrPCHWrite:
       ClangAttrPCHWriteEmitter(Records).run(Out.os());
       break;
+    case GenClangAttrSpellingList:
+      ClangAttrSpellingListEmitter(Records).run(Out.os());
+      break;
     case GenClangDiagsDefs:
       ClangDiagsDefsEmitter(Records, ClangComponent).run(Out.os());
       break;