From c7fac8c8b26eacaf57db5d5ed4f8c80a47cbfe1d Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 21 Feb 2010 07:55:48 +0000
Subject: [PATCH] when a match fails and we have to rollback, make sure to keep
 'N' in sync with the top of stack.  This fixes a bunch of failures on larger
 testcases.

llvm-svn: 96732
---
 include/llvm/CodeGen/DAGISelHeader.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/llvm/CodeGen/DAGISelHeader.h b/include/llvm/CodeGen/DAGISelHeader.h
index 1e808ed217d..42583ec18b1 100644
--- a/include/llvm/CodeGen/DAGISelHeader.h
+++ b/include/llvm/CodeGen/DAGISelHeader.h
@@ -760,6 +760,7 @@ SDNode *SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
     const MatchScope &LastScope = MatchScopes.back();
     RecordedNodes.resize(LastScope.NumRecordedNodes);
     NodeStack.resize(LastScope.NodeStackSize);
+    N = NodeStack.back();
     
     if (LastScope.NumMatchedMemRefs != MatchedMemRefs.size())
       MatchedMemRefs.resize(LastScope.NumMatchedMemRefs);