From f43de1879a5cba695470de29af4202c71c962c6a Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Mon, 2 Mar 2015 16:42:56 +0000
Subject: [PATCH] Avoid assertion in MSVC 2013 debug builds.

llvm-svn: 230972
---
 llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index dcb2ab0a333d..00dc717e1e47 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -5419,7 +5419,7 @@ UpdateNodeOperands(SDNode *N, ArrayRef<SDValue> Ops) {
          "Update with wrong number of operands");
 
   // If no operands changed just return the input node.
-  if (std::equal(Ops.begin(), Ops.end(), N->op_begin()))
+  if (!Ops.empty() && std::equal(Ops.begin(), Ops.end(), N->op_begin()))
     return N;
 
   // See if the modified node already exists.