Lexer Support for Multidefs

Add keyword support for multidefs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141231 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/TableGen/TGLexer.h b/lib/TableGen/TGLexer.h
index 84d328b..7e22287 100644
--- a/lib/TableGen/TGLexer.h
+++ b/lib/TableGen/TGLexer.h
@@ -41,7 +41,7 @@
     equal, question,    // = ?
     
     // Keywords.
-    Bit, Bits, Class, Code, Dag, Def, Defm, Field, In, Int, Let, List,
+    Bit, Bits, Class, Code, Dag, Def, MultiDef, Defm, Field, In, Int, Let, List,
     MultiClass, String,
     
     // !keywords.