Refactor BasicBlock, no inheritance from GenericNode

src/compiler/code-generator.h

 // Copyright 2014 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.
 
 #ifndef V8_COMPILER_CODE_GENERATOR_H_
 #define V8_COMPILER_CODE_GENERATOR_H_
 
 #include <deque>
 
 #include "src/compiler/gap-resolver.h"
@@ skipping 23 matching lines @@
 
  private:
   MacroAssembler* masm() { return &masm_; }
   GapResolver* resolver() { return &resolver_; }
   SafepointTableBuilder* safepoints() { return &safepoints_; }
   Zone* zone() const { return code()->zone(); }
 
   // Checks if {block} will appear directly after {current_block_} when
   // assembling code, in which case, a fall-through can be used.
   bool IsNextInAssemblyOrder(const BasicBlock* block) const {
-    return block->rpo_number_ == (current_block_->rpo_number_ + 1) &&
-           block->deferred_ == current_block_->deferred_;
+    return block->rpo_number() == (current_block_->rpo_number() + 1) &&
+           block->deferred() == current_block_->deferred();
   }
 
   // Record a safepoint with the given pointer map.
   void RecordSafepoint(PointerMap* pointers, Safepoint::Kind kind,
                        int arguments, Safepoint::DeoptMode deopt_mode);
 
   // Assemble code for the specified instruction.
   void AssembleInstruction(Instruction* instr);
   void AssembleSourcePosition(SourcePositionInstruction* instr);
   void AssembleGap(GapInstruction* gap);
@@ skipping 73 matching lines @@
   ZoneDeque<Handle<Object> > deoptimization_literals_;
   TranslationBuffer translations_;
   int last_lazy_deopt_pc_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_H