From: Chris Lattner <sabre@nondot.org>
Date: Sun, 21 Feb 2010 07:55:48 +0000 (+0000)
Subject: when a match fails and we have to rollback, make sure to keep 'N' in
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=863cc971e85950c3d2408306d03c9d70186356a2;p=oota-llvm.git

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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96732 91177308-0d34-0410-b5e6-96231b3b80d8
---

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);