Implement function prefix data as an IR feature.

Previous discussion:
http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-July/063909.html

Differential Revision: http://llvm-reviews.chandlerc.com/D1191

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190773 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLToken.h b/lib/AsmParser/LLToken.h
index 9a6799d..e1382fd 100644
--- a/lib/AsmParser/LLToken.h
+++ b/lib/AsmParser/LLToken.h
@@ -81,6 +81,7 @@
     kw_alignstack,
     kw_inteldialect,
     kw_gc,
+    kw_prefix,
     kw_c,
 
     kw_cc, kw_ccc, kw_fastcc, kw_coldcc,