fix Analysis/BasicAA/2004-12-08-BasicAACrash.ll by allowing opaque types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66395 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index 90af9f1ea7..7f5d4615d1 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -1058,8 +1058,10 @@ static const Type* getIndexedTypeInternal(const Type *Ptr, IndexTy const *Idxs,
     return Agg;
   
   // If there is at least one index, the top level type must be sized, otherwise
-  // it cannot be 'stepped over'.
-  if (!Agg->isSized())
+  // it cannot be 'stepped over'.  We explicitly allow abstract types (those
+  // that contain opaque types) under the assumption that it will be resolved to
+  // a sane type later.
+  if (!Agg->isSized() && !Agg->isAbstract())
     return 0;
 
   unsigned CurIdx = 1;