message: [XLA] CSE needs to take the slice stride into account
  Found via inspection.
diff: @@ -1538,7 +1538,8 @@ bool HloInstruction::IdenticalSlowPath(
  other.padding_config());
  case HloOpcode::kSlice:
  return slice_starts_ == other.slice_starts_ &&
  - slice_limits_ == other.slice_limits_;
  + slice_limits_ == other.slice_limits_ &&
  + slice_strides_ == other.slice_strides_;
  case HloOpcode::kDynamicSlice:
  return ShapeUtil::Compatible(shape(), other.shape()) &&
  dynamic_slice_sizes_ == other.dynamic_slice_sizes_;
  