make sure dead token factor nodes are removed by the dag combiner.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26731 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 33b046c36708ffba443c3974126135bbd1e0fcc4..b388d830f36a00fda60147a2afe0cd0d2719b451 100644 (file)
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -665,6 +665,7 @@ SDOperand DAGCombiner::visitTokenFactor(SDNode *N) {
   for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
     SDOperand Op = N->getOperand(i);
     if (Op.getOpcode() == ISD::TokenFactor && Op.hasOneUse()) {
+      AddToWorkList(Op.Val);  // Remove dead node.
       Changed = true;
       for (unsigned j = 0, e = Op.getNumOperands(); j != e; ++j)
         Ops.push_back(Op.getOperand(j));