[turbofan] Add new JSIntrinsicsLowering reducer.

src/compiler/js-intrinsic-builder.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_JS_INTRINSIC_BUILDER_H_
-#define V8_COMPILER_JS_INTRINSIC_BUILDER_H_
-
-#include "src/compiler/js-graph.h"
-#include "src/v8.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-typedef std::pair<Node*, Node*> ResultAndEffect;
-
-class JSIntrinsicBuilder {
- public:
-  explicit JSIntrinsicBuilder(JSGraph* jsgraph) : jsgraph_(jsgraph) {}
-
-  ResultAndEffect BuildGraphFor(Runtime::FunctionId id,
-                                const NodeVector& arguments);
-
- private:
-  ResultAndEffect BuildMapCheck(Node* object, Node* effect,
-                                InstanceType map_type);
-  ResultAndEffect BuildGraphFor_IsSmi(const NodeVector& arguments);
-  ResultAndEffect BuildGraphFor_IsNonNegativeSmi(const NodeVector& arguments);
-  ResultAndEffect BuildGraphFor_ValueOf(const NodeVector& arguments);
-
-
-  Graph* graph() const { return jsgraph_->graph(); }
-  CommonOperatorBuilder* common() const { return jsgraph_->common(); }
-  JSGraph* jsgraph_;
-};
-}
-}
-}  // namespace v8::internal::compiler
-
-#endif  // V8_COMPILER_JS_INTRINSIC_BUILDER_H_