[X86] getTargetConstantPoolFromBasePtr - drop const qualifier

Return ConstantPoolSDNode instead of const ConstantPoolSDNode - doesn't affect the accessors at all and makes it easier to use result in calls expecting a SDNode.

Author: RKSimon

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -4554,15 +4554,15 @@ static SDValue getShuffleVectorZeroOrUndef(SDValue V2, int Idx,
   return DAG.getVectorShuffle(VT, SDLoc(V2), V1, V2, MaskVec);
 }
 
-static const ConstantPoolSDNode *getTargetConstantPoolFromBasePtr(SDValue Ptr) {
+static ConstantPoolSDNode *getTargetConstantPoolFromBasePtr(SDValue Ptr) {
   if (Ptr.getOpcode() == X86ISD::Wrapper ||
       Ptr.getOpcode() == X86ISD::WrapperRIP)
     Ptr = Ptr.getOperand(0);
   return dyn_cast<ConstantPoolSDNode>(Ptr);
 }
 
 static const Constant *getTargetConstantFromBasePtr(SDValue Ptr) {
-  const ConstantPoolSDNode *CNode = getTargetConstantPoolFromBasePtr(Ptr);
+  ConstantPoolSDNode *CNode = getTargetConstantPoolFromBasePtr(Ptr);
   if (!CNode || CNode->isMachineConstantPoolEntry() || CNode->getOffset() != 0)
     return nullptr;
   return CNode->getConstVal();