[WIP] JSForInLowering and JSForInHasOwnProperty.

src/compiler/js-generic-lowering.cc

 // 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.
 
 #include "src/compiler/js-generic-lowering.h"
 
 #include "src/ast/ast.h"
 #include "src/builtins/builtins-constructor.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 575 matching lines @@
 
 void JSGenericLowering::LowerJSCallRuntime(Node* node) {
   const CallRuntimeParameters& p = CallRuntimeParametersOf(node->op());
   ReplaceWithRuntimeCall(node, p.id(), static_cast<int>(p.arity()));
 }
 
 void JSGenericLowering::LowerJSConvertReceiver(Node* node) {
   ReplaceWithRuntimeCall(node, Runtime::kConvertReceiver);
 }
 
+void JSGenericLowering::LowerJSForInHasOwnProperty(Node* node) {
+  UNREACHABLE();  // Eliminated in JSForInLowering.
+}
+
+void JSGenericLowering::LowerJSForInLoadProperty(Node* node) {
+  UNREACHABLE();  // Eliminated in JSForInLowering.
+}
+
 void JSGenericLowering::LowerJSForInNext(Node* node) {
-  CallDescriptor::Flags flags = FrameStateFlagForCall(node);
-  Callable callable = CodeFactory::ForInNext(isolate());
-  ReplaceWithStubCall(node, callable, flags);
+  UNREACHABLE();  // Eliminated in JSForInLowering.
 }
 
 void JSGenericLowering::LowerJSForInPrepare(Node* node) {
-  CallDescriptor::Flags flags = FrameStateFlagForCall(node);
-  Callable callable = CodeFactory::ForInPrepare(isolate());
-  ReplaceWithStubCall(node, callable, flags, node->op()->properties(), 3);
+  UNREACHABLE();  // Eliminated in JSForInLowering.
 }
 
 void JSGenericLowering::LowerJSLoadMessage(Node* node) {
   UNREACHABLE();  // Eliminated in typed lowering.
 }
 
 
 void JSGenericLowering::LowerJSStoreMessage(Node* node) {
   UNREACHABLE();  // Eliminated in typed lowering.
 }
@@ skipping 88 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8