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

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/lib/TableGen/Record.cpp b/llvm/lib/TableGen/Record.cpp
index 44945e3adb6..b7c51cae953 100644
--- a/llvm/lib/TableGen/Record.cpp
+++ b/llvm/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;
   }