[X86] Support EVT types in supportedVectorShift* helpers. NFCI.

Move the isSimple() check inside the helpers to avoid a lot of extra checking in a future patch.

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -30831,8 +30831,11 @@ SDValue X86TargetLowering::LowerWin64_INT128_TO_FP(SDValue Op,
 
 // Return true if the required (according to Opcode) shift-imm form is natively
 // supported by the Subtarget
-static bool supportedVectorShiftWithImm(MVT VT, const X86Subtarget &Subtarget,
+static bool supportedVectorShiftWithImm(EVT VT, const X86Subtarget &Subtarget,
                                         unsigned Opcode) {
+  if (!VT.isSimple())
+    return false;
+
   if (!(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()))
     return false;
 
@@ -30854,15 +30857,18 @@ static bool supportedVectorShiftWithImm(MVT VT, const X86Subtarget &Subtarget,
 // The shift amount is a variable, but it is the same for all vector lanes.
 // These instructions are defined together with shift-immediate.
 static
-bool supportedVectorShiftWithBaseAmnt(MVT VT, const X86Subtarget &Subtarget,
+bool supportedVectorShiftWithBaseAmnt(EVT VT, const X86Subtarget &Subtarget,
                                       unsigned Opcode) {
   return supportedVectorShiftWithImm(VT, Subtarget, Opcode);
 }
 
 // Return true if the required (according to Opcode) variable-shift form is
 // natively supported by the Subtarget
-static bool supportedVectorVarShift(MVT VT, const X86Subtarget &Subtarget,
+static bool supportedVectorVarShift(EVT VT, const X86Subtarget &Subtarget,
                                     unsigned Opcode) {
+  if (!VT.isSimple())
+    return false;
+
   if (!(VT.is128BitVector() || VT.is256BitVector() || VT.is512BitVector()))
     return false;
 
@@ -49719,7 +49725,7 @@ static SDValue combineAndMaskToShift(SDNode *N, SelectionDAG &DAG,
   // If the bitcasts can't be eliminated, then it is unlikely that this fold
   // will be profitable.
   if (N->getValueType(0) == VT &&
-      supportedVectorShiftWithImm(VT.getSimpleVT(), Subtarget, ISD::SRA)) {
+      supportedVectorShiftWithImm(VT, Subtarget, ISD::SRA)) {
     SDValue X, Y;
     if (Op1.getOpcode() == X86ISD::PCMPGT &&
         isAllOnesOrAllOnesSplat(Op1.getOperand(1)) && Op1.hasOneUse()) {
@@ -49748,7 +49754,7 @@ static SDValue combineAndMaskToShift(SDNode *N, SelectionDAG &DAG,
   if (isBitwiseNot(Op0))
     return SDValue();
 
-  if (!supportedVectorShiftWithImm(VT.getSimpleVT(), Subtarget, ISD::SRL))
+  if (!supportedVectorShiftWithImm(VT, Subtarget, ISD::SRL))
     return SDValue();
 
   unsigned EltBitWidth = VT.getScalarSizeInBits();