Simplify some logic in ComputeMaskedBits. And change ComputeMaskedBits

to pass the mask APInt by value, not by reference. 

llvm-svn: 47096

2 files changed, 2 insertions, 2 deletions

diff --git a/llvm/include/llvm/CodeGen/SelectionDAG.h b/llvm/include/llvm/CodeGen/SelectionDAG.h
index 560e0fca132..22487dd5c37 100644
--- a/llvm/include/llvm/CodeGen/SelectionDAG.h
+++ b/llvm/include/llvm/CodeGen/SelectionDAG.h
@@ -556,7 +556,7 @@ public:
   /// bitsets.  This code only analyzes bits in Mask, in order to short-circuit
   /// processing.  Targets can implement the computeMaskedBitsForTargetNode 
   /// method in the TargetLowering class to allow target nodes to be understood.
-  void ComputeMaskedBits(SDOperand Op, APInt Mask, APInt &KnownZero,
+  void ComputeMaskedBits(SDOperand Op, const APInt &Mask, APInt &KnownZero,
                          APInt &KnownOne, unsigned Depth = 0) const;
 
   /// ComputeMaskedBits - This is a wrapper around the APInt-using
diff --git a/llvm/include/llvm/Target/TargetLowering.h b/llvm/include/llvm/Target/TargetLowering.h
index d81dacf41f7..ef8a4474097 100644
--- a/llvm/include/llvm/Target/TargetLowering.h
+++ b/llvm/include/llvm/Target/TargetLowering.h
@@ -627,7 +627,7 @@ public:
   /// Mask are known to be either zero or one and return them in the 
   /// KnownZero/KnownOne bitsets.
   virtual void computeMaskedBitsForTargetNode(const SDOperand Op,
-                                              APInt Mask,
+                                              const APInt &Mask,
                                               APInt &KnownZero, 
                                               APInt &KnownOne,
                                               const SelectionDAG &DAG,