[snapshot] Move builtins generation into mksnapshot

src/interpreter/setup-interpreter.h

+// Copyright 2017 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_INTERPRETER_SETUP_INTERPRETER_H_
+#define V8_INTERPRETER_SETUP_INTERPRETER_H_
+
+#include "src/interpreter/bytecode-operands.h"
+#include "src/interpreter/bytecodes.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+class Interpreter;
+
+class SetupInterpreter {
+ public:
+  static void InstallBytecodeHandlers(Interpreter* interpreter);
+
+ private:
+  // In the case of bytecodes that share handler implementations, copy the code
+  // into the bytecode's dispatcher table entry and return true.
+  static bool ReuseExistingHandler(Address* dispatch_table, Bytecode bytecode,
+                                   OperandScale operand_scale);
+  // Generates handler for given |bytecode| and |operand_scale|
+  // and installs it into the |dispatch_table|.
+  static void InstallBytecodeHandler(Isolate* isolate, Address* dispatch_table,
+                                     Bytecode bytecode,
+                                     OperandScale operand_scale);
+};
+
+}  // namespace interpreter
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_INTERPRETER_SETUP_INTERPRETER_H_