message: [XLA] The algebraic simplifier can't handle variadic reduce at this point.
diff: @@ -1803,6 +1803,12 @@ Status AlgebraicSimplifierVisitor::HandleDynamicUpdateSlice(
  }
  Status AlgebraicSimplifierVisitor::HandleReduce(HloInstruction* reduce) {
  + // TODO(b/112040122): Most of those optimizations can be done for multi-output
  + // reduces.
  + if (ShapeUtil::IsTuple(reduce->shape())) {
  + return Status::OK();
  + }
  +
  auto arg = reduce->mutable_operand(0);
  auto init_value = reduce->mutable_operand(1);
  tensorflow::gtl::ArraySlice<int64> dimensions(reduce->dimensions());
  