Fix CodeGen/PowerPC/2007-05-30-dagcombine-miscomp.ll, and PR1473.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37362 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 0ce8b3faeb5ab5d43690688235f9df2cf2e98b50..30ada12bc73d2de40013f8603992b1ca40b08f1a 100644 (file)
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -587,7 +587,7 @@ bool TargetLowering::SimplifyDemandedBits(SDOperand Op, uint64_t DemandedMask,
           }          
           
           SDOperand NewSA = 
-            TLO.DAG.getConstant(ShAmt-C1, Op.getOperand(1).getValueType());
+            TLO.DAG.getConstant(Diff, Op.getOperand(1).getValueType());
           MVT::ValueType VT = Op.getValueType();
           return TLO.CombineTo(Op, TLO.DAG.getNode(Opc, VT,
                                                    InOp.getOperand(0), NewSA));