[interpreter]: Changes to interpreter builtins for accumulator and register file registers.

test/cctest/interpreter/test-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/v8.h"
 
 #include "src/execution.h"
 #include "src/handles.h"
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/interpreter.h"
@@ skipping 54 matching lines @@
 
 using namespace v8::internal;
 using namespace v8::internal::interpreter;
 
 TEST(TestInterpreterReturn) {
   InitializedHandleScope handles;
   Handle<Object> undefined_value =
       handles.main_isolate()->factory()->undefined_value();
 
   BytecodeArrayBuilder builder(handles.main_isolate());
-  // TODO(rmcilroy) set to 0 once BytecodeArray update to allow zero size
-  // register file.
-  builder.set_locals_count(1);
+  builder.set_locals_count(0);
   builder.Return();
   Handle<BytecodeArray> bytecode_array = builder.ToBytecodeArray();
 
   InterpreterTester tester(handles.main_isolate(), bytecode_array);
   InterpreterCallable callable(tester.GetCallable());
   Handle<Object> return_val = callable().ToHandleChecked();
   CHECK(return_val.is_identical_to(undefined_value));
 }