From 711c41bd3d16bc9cbf3c7670761a386a4e0f2374 Mon Sep 17 00:00:00 2001
From: David Greene <greened@obbligato.org>
Date: Thu, 6 Oct 2011 21:20:46 +0000
Subject: [PATCH] Fix List-of-List Processing

Fix VarListElementInit::resolveListElementReference to return a
partially resolved VarListElementInint in the case where full
resolution is not possible.  This allows TableGen to make forward
progress resolving certain complex list expressions.

llvm-svn: 141315
---
 lib/TableGen/Record.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/TableGen/Record.cpp b/lib/TableGen/Record.cpp
index 44945e3adb6..b7c51cae953 100644
--- a/lib/TableGen/Record.cpp
+++ b/lib/TableGen/Record.cpp
@@ -1456,7 +1456,9 @@ Init *VarListElementInit:: resolveListElementReference(Record &R,
   if (Result) {
     TypedInit *TInit = dynamic_cast<TypedInit *>(Result);
     if (TInit) {
-      return TInit->resolveListElementReference(R, RV, Elt);
+      Init *Result2 = TInit->resolveListElementReference(R, RV, Elt);
+      if (Result2) return Result2;
+      return new VarListElementInit(TInit, Elt);
     }
     return Result;
   }