From: Chris Lattner <sabre@nondot.org>
Date: Sun, 28 Mar 2010 04:54:33 +0000 (+0000)
Subject: don't add flag nodes with chain results to the NowDeadNodes
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=19e37cbf4fa202fc7ca1d769e5ce476f83290dd5;p=oota-llvm.git

don't add flag nodes with chain results to the NowDeadNodes
list multiple times when MorphNodeTo can't be applied.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99735 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 6c22262d8c5..600557eddfd 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -1614,8 +1614,9 @@ UpdateChainsAndFlags(SDNode *NodeToMatch, SDValue InputChain,
       CurDAG->ReplaceAllUsesOfValueWith(SDValue(FRN, FRN->getNumValues()-1),
                                         InputFlag, &ISU);
       
-      // If the node became dead, delete it.
-      if (FRN->use_empty())
+      // If the node became dead and we haven't already seen it, delete it.
+      if (FRN->use_empty() &&
+          !std::count(NowDeadNodes.begin(), NowDeadNodes.end(), FRN))
         NowDeadNodes.push_back(FRN);
     }
   }