From c8056a952e2bbe1d7a1d3d9092405e04f124b714 Mon Sep 17 00:00:00 2001
From: Bob Wilson <bob.wilson@apple.com>
Date: Thu, 13 Jan 2011 18:26:59 +0000
Subject: [PATCH] Check for empty structs, and for consistency, zero-element
 arrays.

llvm-svn: 123383
---
 llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp b/llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp
index 0ec095749f9e..e248413f4380 100644
--- a/llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp
+++ b/llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp
@@ -1084,12 +1084,12 @@ static bool isHomogeneousAggregate(const Type *T, unsigned &NumElts,
                                    const Type *&EltTy) {
   if (const ArrayType *AT = dyn_cast<ArrayType>(T)) {
     NumElts = AT->getNumElements();
-    EltTy = AT->getElementType();
+    EltTy = (NumElts == 0 ? 0 : AT->getElementType());
     return true;
   }
   if (const StructType *ST = dyn_cast<StructType>(T)) {
     NumElts = ST->getNumContainedTypes();
-    EltTy = ST->getContainedType(0);
+    EltTy = (NumElts == 0 ? 0 : ST->getContainedType(0));
     for (unsigned n = 1; n < NumElts; ++n) {
       if (ST->getContainedType(n) != EltTy)
         return false;