message: disable live-range-splitting
  Summary:
  See T124893789 for details. TLDR is that live-range-splitting is broken, and this diff disables the last active test code that (accidentally) enabled it.
  I need this for to not cause verification errors due to the broken live-range-splitting.
diff: @@ -1100,6 +1100,9 @@ void Allocator::allocate(cfg::ControlFlowGraph& cfg, bool is_static) {
  if (!spill_plan.empty()) {
  TRACE(REG, 5, "Spill plan:\n%s", SHOW(spill_plan));
  if (m_config.use_splitting) {
  + // TODO (T124893789): Live-range-splitting is known to be broken.
  + fprintf(stderr,
  + "WARNING: Live-range-splitting is known to be broken.\n");
  calc_split_costs(fixpoint_iter, cfg, &split_costs);
  find_split(ig, split_costs, &reg_transform, &spill_plan, &split_plan);
  }
  