c-index-test: Add "none" filter, useful for performance testing.

llvm-svn: 95800
diff --git a/clang/tools/c-index-test/c-index-test.c b/clang/tools/c-index-test/c-index-test.c
index 423fa93..26df528 100644
--- a/clang/tools/c-index-test/c-index-test.c
+++ b/clang/tools/c-index-test/c-index-test.c
@@ -464,6 +464,7 @@
   
     /* Perform some simple filtering. */
     if (!strcmp(filter, "all") || !strcmp(filter, "local")) ck = NULL;
+    else if (!strcmp(filter, "none")) K = (enum CXCursorKind) ~0;
     else if (!strcmp(filter, "category")) K = CXCursor_ObjCCategoryDecl;
     else if (!strcmp(filter, "interface")) K = CXCursor_ObjCInterfaceDecl;
     else if (!strcmp(filter, "protocol")) K = CXCursor_ObjCProtocolDecl;