[interpreter] Split out intrinsics generation

src/interpreter/interpreter-intrinsics-generator.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_INTERPRETER_INTRINSICS_GENERATOR_H_
+#define V8_INTERPRETER_INTERPRETER_INTRINSICS_GENERATOR_H_
+
+namespace v8 {
+namespace internal {
+
+namespace compiler {
+class Node;
+}  // namespace compiler
+
+namespace interpreter {
+
+class InterpreterAssembler;
+
+extern compiler::Node* GenerateInvokeIntrinsic(InterpreterAssembler* assembler,
+                                               compiler::Node* function_id,
+                                               compiler::Node* context,
+                                               compiler::Node* first_arg_reg,
+                                               compiler::Node* arg_count);
+
+}  // namespace interpreter
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_INTERPRETER_INTERPRETER_INTRINSICS_GENERATOR_H_