From 0d6dd4bdb9bddd85f53cb5496a215b166a427a83 Mon Sep 17 00:00:00 2001
From: Dale Johannesen <dalej@apple.com>
Date: Thu, 27 Nov 2008 00:43:21 +0000
Subject: [PATCH] Add a missing case in visitADD.

llvm-svn: 60137
---
 lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 762fcedc7fb..6b35126a10e 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -1010,6 +1010,9 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
   // fold (A+(B-A)) -> B
   if (N1.getOpcode() == ISD::SUB && N0 == N1.getOperand(1))
     return N1.getOperand(0);
+  // fold ((B-A)+A) -> B
+  if (N0.getOpcode() == ISD::SUB && N1 == N0.getOperand(1))
+    return N0.getOperand(0);
 
   if (!VT.isVector() && SimplifyDemandedBits(SDValue(N, 0)))
     return SDValue(N, 0);