[csa] Fix the bound & used condition check for RawMachineLabel and CodeAssemblerLabel.

src/compiler/code-assembler.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 701 matching lines @@
       label_(nullptr) {
   void* buffer = assembler->zone()->New(sizeof(RawMachineLabel));
   label_ = new (buffer)
       RawMachineLabel(type == kDeferred ? RawMachineLabel::kDeferred
                                         : RawMachineLabel::kNonDeferred);
   for (size_t i = 0; i < vars_count; ++i) {
     variable_phis_[vars[i]->impl_] = nullptr;
   }
 }
 
+CodeAssemblerLabel::~CodeAssemblerLabel() { label_->~RawMachineLabel(); }
+
 void CodeAssemblerLabel::MergeVariables() {
   ++merge_count_;
   for (auto var : state_->variables_) {
     size_t count = 0;
     Node* node = var->value_;
     if (node != nullptr) {
       auto i = variable_merges_.find(var);
       if (i != variable_merges_.end()) {
         i->second.push_back(node);
         count = i->second.size();
@@ skipping 86 matching lines @@
       }
     }
   }
 
   bound_ = true;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8