Added \!con(a,b) syntax to concatnate two dag fragments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37063 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/FileLexer.l.cvs b/utils/TableGen/FileLexer.l.cvs
index cc6825f..59bbdad 100644
--- a/utils/TableGen/FileLexer.l.cvs
+++ b/utils/TableGen/FileLexer.l.cvs
@@ -206,6 +206,7 @@
 let            { return LET; }
 in             { return IN; }
 
+!con           { return CONCATTOK; }
 !sra           { return SRATOK; }
 !srl           { return SRLTOK; }
 !shl           { return SHLTOK; }