add a case missing from the dag combiner that exposed the failure on

2005-10-21-longlonggtu.ll.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23875 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index b523bce339a84437ac5d1cc7dd0a56e87c9d511b..3efc25aebdcb24a3eae081800ee6e1681542ebf1 100644 (file)
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -2370,6 +2370,9 @@ SDOperand DAGCombiner::SimplifySetCC(MVT::ValueType VT, SDOperand N0,
       // Canonicalize setgt X, Min --> setne X, Min
       if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C1 == MinVal)
         return DAG.getSetCC(VT, N0, N1, ISD::SETNE);
+      // Canonicalize setlt X, Max --> setne X, Max
+      if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C1 == MaxVal)
+        return DAG.getSetCC(VT, N0, N1, ISD::SETNE);
 
       // If we have setult X, 1, turn it into seteq X, 0
       if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C1 == MinVal+1)