Decouple root visitors from object visitors.

src/interpreter/interpreter.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/interpreter/interpreter.h"
 
 #include <fstream>
 #include <memory>
 
 #include "src/codegen.h"
 #include "src/compilation-info.h"
 #include "src/compiler.h"
 #include "src/counters.h"
 #include "src/interpreter/bytecode-generator.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/log.h"
 #include "src/objects.h"
 #include "src/setup-isolate.h"
+#include "src/visitors.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
 class InterpreterCompilationJob final : public CompilationJob {
  public:
   explicit InterpreterCompilationJob(CompilationInfo* info);
 
  protected:
@@ skipping 73 matching lines @@
       return index;
     case OperandScale::kDouble:
       return index + kEntriesPerOperandScale;
     case OperandScale::kQuadruple:
       return index + 2 * kEntriesPerOperandScale;
   }
   UNREACHABLE();
   return 0;
 }
 
-void Interpreter::IterateDispatchTable(ObjectVisitor* v) {
+void Interpreter::IterateDispatchTable(RootVisitor* v) {
   for (int i = 0; i < kDispatchTableSize; i++) {
     Address code_entry = dispatch_table_[i];
     Object* code = code_entry == nullptr
                        ? nullptr
                        : Code::GetCodeFromTargetAddress(code_entry);
     Object* old_code = code;
-    v->VisitPointer(&code);
+    v->VisitRootPointer(Root::kDispatchTable, &code);
     if (code != old_code) {
       dispatch_table_[i] = reinterpret_cast<Code*>(code)->entry();
     }
   }
 }
 
 // static
 int Interpreter::InterruptBudget() {
   return FLAG_interrupt_budget * kCodeSizeMultiplier;
 }
@@ skipping 153 matching lines @@
         counters_map->DefineOwnProperty(context, from_name_object, counters_row)
             .IsJust());
   }
 
   return counters_map;
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8