Various cleanups and efficiency improvements

[oota-llvm.git] / lib / Transforms / TransformInternals.cpp

diff --git a/lib/Transforms/TransformInternals.cpp b/lib/Transforms/TransformInternals.cpp
index f726e829aa604c40140c2434e4c4b7fdc1652aba..3a1d51c3a02c9518386bfec31fdb74ce1eaac494 100644 (file)
--- a/lib/Transforms/TransformInternals.cpp
+++ b/lib/Transforms/TransformInternals.cpp
@@ -1,4 +1,11 @@
 //===- TransformInternals.cpp - Implement shared functions for transforms -===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
 //
 //  This file defines shared functions used by the different components of the
 //  Transforms library.
@@ -53,6 +60,11 @@ const Type *getStructOffsetType(const Type *Ty, unsigned &Offset,
   uint64_t ThisOffset;
   const Type *NextType;
   if (const StructType *STy = dyn_cast<StructType>(Ty)) {
+    if (STy->getElementTypes().empty()) {
+      Offset = 0;
+      return STy;
+    }
+
     ThisOffset = Offset;
     NextType = getStructOffsetStep(STy, ThisOffset, Indices, TD);
   } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {