Implementation of gcc mode attribute; this is significant because 
it fixes PR2204.  Not too much to say about the implementation; it works 
in a similar way to the vector size attribute.

At some point, we need to modify the targets to provide information 
about the appropriate types.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51577 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/AttributeList.cpp b/lib/Parse/AttributeList.cpp
index 2d8de97..c99722c 100644
--- a/lib/Parse/AttributeList.cpp
+++ b/lib/Parse/AttributeList.cpp
@@ -54,6 +54,7 @@
   case 4:
     if (!memcmp(Str, "weak", 4)) return AT_weak;
     if (!memcmp(Str, "pure", 4)) return AT_pure;
+    if (!memcmp(Str, "mode", 4)) return AT_mode;
     break;
   case 6:
     if (!memcmp(Str, "packed", 6)) return AT_packed;