[X86] resolveTargetShuffleInputs - add DemandedElts variant. NFCI.

Nothing calls this yet, everything still goes through the non (all) DemandedElts wrapper.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@369136 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index a6131f9e4b5bbdcd70786e5fae3b337b0cee2695..c9e3390c5d137cafcc816f163b0cdf8b8116205d 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -7089,12 +7089,10 @@ static void resolveTargetShuffleInputsAndMask(SmallVectorImpl<SDValue> &Inputs,
 /// remaining input indices in case we now have a unary shuffle and adjust the
 /// inputs accordingly.
 /// Returns true if the target shuffle mask was decoded.
-static bool resolveTargetShuffleInputs(SDValue Op,
+static bool resolveTargetShuffleInputs(SDValue Op, const APInt &DemandedElts,
                                        SmallVectorImpl<SDValue> &Inputs,
                                        SmallVectorImpl<int> &Mask,
                                        SelectionDAG &DAG, unsigned Depth) {
-  unsigned NumElts = Op.getValueType().getVectorNumElements();
-  APInt DemandedElts = APInt::getAllOnesValue(NumElts);
   if (!setTargetShuffleZeroElements(Op, Mask, Inputs))
     if (!getFauxShuffleMask(Op, DemandedElts, Mask, Inputs, DAG, Depth))
       return false;
@@ -7103,6 +7101,15 @@ static bool resolveTargetShuffleInputs(SDValue Op,
   return true;
 }
 
+static bool resolveTargetShuffleInputs(SDValue Op,
+                                       SmallVectorImpl<SDValue> &Inputs,
+                                       SmallVectorImpl<int> &Mask,
+                                       SelectionDAG &DAG, unsigned Depth) {
+  unsigned NumElts = Op.getValueType().getVectorNumElements();
+  APInt DemandedElts = APInt::getAllOnesValue(NumElts);
+  return resolveTargetShuffleInputs(Op, DemandedElts, Inputs, Mask, DAG, Depth);
+}
+
 /// Returns the scalar element that will make up the ith
 /// element of the result of the vector shuffle.
 static SDValue getShuffleScalarElt(SDNode *N, unsigned Index, SelectionDAG &DAG,