From a2f514d6727f86416926b4017fac268ad8b7faba Mon Sep 17 00:00:00 2001
From: Nirav Dave <niravd@google.com>
Date: Tue, 25 Sep 2018 15:29:57 +0000
Subject: [PATCH] [LegalizeDAG] Prune Predecessor check in
 ExpandExtractFromVectorThroughStack. NFCI.

llvm-svn: 342985
---
 llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index b6bd854..f9a0a6c 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -1248,6 +1248,7 @@ SDValue SelectionDAGLegalize::ExpandExtractFromVectorThroughStack(SDValue Op) {
   // Caches for hasPredecessorHelper
   SmallPtrSet<const SDNode *, 32> Visited;
   SmallVector<const SDNode *, 16> Worklist;
+  Visited.insert(Op.getNode());
   Worklist.push_back(Idx.getNode());
   SDValue StackPtr, Ch;
   for (SDNode::use_iterator UI = Vec.getNode()->use_begin(),
-- 
2.7.4