message: [XLA] Reset the state of multioutput fusion after run since it may be inside an
  hlo pipeline.
diff: @@ -108,6 +108,11 @@ StatusOr<bool> MultiOutputFusion::Run(HloModule* module) {
  changed = true;
  }
  }
  + // Clean up state in case this pass is wrapped in an HloPassPipeline.
  + candidates_.clear();
  + candidates_index_.clear();
  + all_fusion_candidates_.clear();
  + reachability_.reset();
  return changed;
  }
  