message: stack2reg: Remove self in remove_unused_stack_addr and()
  remove_unused_load()
diff: @@ -79,16 +79,14 @@ fn potential_loads_of_store(&self, ctx: &Context, store: Inst) -> Vec<Inst> {
  }).collect::<Vec<Inst>>()
  }
  - fn remove_unused_stack_addr(&mut self, func: &mut Function, inst: Inst) {
  + fn remove_unused_stack_addr(func: &mut Function, inst: Inst) {
  func.dfg.detach_results(inst);
  func.dfg.replace(inst).nop();
  - self.stack_addr.remove(&inst);
  }
  - fn remove_unused_load(&mut self, func: &mut Function, load: Inst) {
  + fn remove_unused_load(func: &mut Function, load: Inst) {
  func.dfg.detach_results(load);
  func.dfg.replace(load).nop();
  - self.stack_load.remove(&load);
  }
  fn remove_dead_store(&mut self, func: &mut Function, store: Inst) {
  @@ -315,18 +313,21 @@ fn remove_unused_stack_addr_and_stack_load(opt_ctx: &mut OptimizeContext<'_>) {
  // Replace all unused stack_addr and stack_load instructions with nop.
  for stack_slot_users in opt_ctx.stack_slot_usage_map.values_mut() {
  - // FIXME: Remove clone
  for &inst in stack_slot_users.stack_addr.clone().iter() {
  if stack_addr_load_insts_users.get(&inst).map(|users| users.is_empty()).unwrap_or(true) {
  - stack_slot_users.remove_unused_stack_addr(&mut opt_ctx.ctx.func, inst);
  + StackSlotUsage::remove_unused_stack_addr(&mut opt_ctx.ctx.func, inst);
  + stack_slot_users.stack_addr.remove(&inst);
  }
  }
  + /*
  for &inst in stack_slot_users.stack_load.clone().iter() {
  if stack_addr_load_insts_users.get(&inst).map(|users| users.is_empty()).unwrap_or(true) {
  - stack_slot_users.remove_unused_load(&mut opt_ctx.ctx.func, inst);
  + StackSlotUsage::remove_unused_load(&mut opt_ctx.ctx.func, inst);
  + stack_slot_users.stack_load.remove(&inst);
  }
  }
  + */
  }
  }
  