Revert "[SLP]Fix a check for the whole register use"

breaks build of rocTHRUST

This reverts commit bfd8cc0.

Author: ronlieb

llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

@@ -8854,8 +8854,7 @@ void BoUpSLP::buildTree_rec(ArrayRef<Value *> VL, unsigned Depth,
       // FIXME: Reshuffing scalars is not supported yet for non-power-of-2 ops.
       if ((UserTreeIdx.UserTE &&
            UserTreeIdx.UserTE->hasNonWholeRegisterOrNonPowerOf2Vec(*TTI)) ||
-          !hasFullVectorsOrPowerOf2(*TTI, getValueType(VL.front()),
-                                    VL.size())) {
+          !hasFullVectorsOrPowerOf2(*TTI, VL.front()->getType(), VL.size())) {
         LLVM_DEBUG(dbgs() << "SLP: Reshuffling scalars not yet supported "
                              "for nodes with padding.\n");
         auto Invalid = ScheduleBundle::invalid();