fix PR6533 by updating the br(xor) code to remember the case
when it looked past a trunc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98203 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 82bf478..aa283ad 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -4605,7 +4605,7 @@
SDNode *Trunc = 0;
if (N1.getOpcode() == ISD::TRUNCATE && N1.hasOneUse()) {
- // Look pass truncate.
+ // Look past truncate.
Trunc = N1.getNode();
N1 = N1.getOperand(0);
}
@@ -4700,7 +4700,9 @@
Equal = true;
}
- EVT SetCCVT = N1.getValueType();
+ SDValue NodeToReplace = Trunc ? SDValue(Trunc, 0) : N1;
+
+ EVT SetCCVT = NodeToReplace.getValueType();
if (LegalTypes)
SetCCVT = TLI.getSetCCResultType(SetCCVT);
SDValue SetCC = DAG.getSetCC(TheXor->getDebugLoc(),
@@ -4709,9 +4711,9 @@
Equal ? ISD::SETEQ : ISD::SETNE);
// Replace the uses of XOR with SETCC
WorkListRemover DeadNodes(*this);
- DAG.ReplaceAllUsesOfValueWith(N1, SetCC, &DeadNodes);
- removeFromWorkList(N1.getNode());
- DAG.DeleteNode(N1.getNode());
+ DAG.ReplaceAllUsesOfValueWith(NodeToReplace, SetCC, &DeadNodes);
+ removeFromWorkList(NodeToReplace.getNode());
+ DAG.DeleteNode(NodeToReplace.getNode());
return DAG.getNode(ISD::BRCOND, N->getDebugLoc(),
MVT::Other, Chain, SetCC, N2);
}