[turbofan] Add support for CreateIterResultObject.

src/compiler/js-intrinsic-lowering.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/compiler/js-intrinsic-lowering.h"
 
 #include <stack>
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
@@ skipping 19 matching lines @@
 
 
 Reduction JSIntrinsicLowering::Reduce(Node* node) {
   if (node->opcode() != IrOpcode::kJSCallRuntime) return NoChange();
   const Runtime::Function* const f =
       Runtime::FunctionForId(CallRuntimeParametersOf(node->op()).id());
   if (f->intrinsic_type != Runtime::IntrinsicType::INLINE) return NoChange();
   switch (f->function_id) {
     case Runtime::kInlineConstructDouble:
       return ReduceConstructDouble(node);
+    case Runtime::kInlineCreateIterResultObject:
+      return ReduceCreateIterResultObject(node);
     case Runtime::kInlineDateField:
       return ReduceDateField(node);
     case Runtime::kInlineDeoptimizeNow:
       return ReduceDeoptimizeNow(node);
     case Runtime::kInlineDoubleHi:
       return ReduceDoubleHi(node);
     case Runtime::kInlineDoubleLo:
       return ReduceDoubleLo(node);
     case Runtime::kInlineIncrementStatsCounter:
       return ReduceIncrementStatsCounter(node);
@@ skipping 59 matching lines @@
       return ReduceTailCall(node);
     case Runtime::kInlineGetSuperConstructor:
       return ReduceGetSuperConstructor(node);
     default:
       break;
   }
   return NoChange();
 }
 
 
+Reduction JSIntrinsicLowering::ReduceCreateIterResultObject(Node* node) {
+  Node* const value = NodeProperties::GetValueInput(node, 0);
+  Node* const done = NodeProperties::GetValueInput(node, 1);
+  Node* const context = NodeProperties::GetContextInput(node);
+  Node* const effect = NodeProperties::GetEffectInput(node);
+  return Change(node, javascript()->CreateIterResultObject(), value, done,
+                context, effect);
+}
+
+
 Reduction JSIntrinsicLowering::ReduceConstructDouble(Node* node) {
   Node* high = NodeProperties::GetValueInput(node, 0);
   Node* low = NodeProperties::GetValueInput(node, 1);
   Node* value =
       graph()->NewNode(machine()->Float64InsertHighWord32(),
                        graph()->NewNode(machine()->Float64InsertLowWord32(),
                                         jsgraph()->Constant(0), low),
                        high);
   ReplaceWithValue(node, value);
   return Replace(value);
@@ skipping 550 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSIntrinsicLowering::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8