[stubs] Unify (and optimize) implementation of ToObject.

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/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
@@ skipping 76 matching lines @@
     case Runtime::kInlineIsMinusZero:
       return ReduceIsMinusZero(node);
     case Runtime::kInlineFixedArrayGet:
       return ReduceFixedArrayGet(node);
     case Runtime::kInlineFixedArraySet:
       return ReduceFixedArraySet(node);
     case Runtime::kInlineGetTypeFeedbackVector:
       return ReduceGetTypeFeedbackVector(node);
     case Runtime::kInlineGetCallerJSFunction:
       return ReduceGetCallerJSFunction(node);
+    case Runtime::kInlineToObject:
+      return ReduceToObject(node);
     case Runtime::kInlineThrowNotDateError:
       return ReduceThrowNotDateError(node);
     case Runtime::kInlineCallFunction:
       return ReduceCallFunction(node);
     default:
       break;
   }
   return NoChange();
 }
 
@@ skipping 414 matching lines @@
   Node* deoptimize =
       graph()->NewNode(common()->Deoptimize(), frame_state, effect, control);
   NodeProperties::MergeControlToEnd(graph(), common(), deoptimize);
 
   node->set_op(common()->Dead());
   node->TrimInputCount(0);
   return Changed(node);
 }
 
 
+Reduction JSIntrinsicLowering::ReduceToObject(Node* node) {
+  node->set_op(javascript()->ToObject());
+  return Changed(node);
+}
+
+
 Reduction JSIntrinsicLowering::ReduceCallFunction(Node* node) {
   CallRuntimeParameters params = OpParameter<CallRuntimeParameters>(node->op());
   size_t arity = params.arity();
   node->set_op(javascript()->CallFunction(arity, NO_CALL_FUNCTION_FLAGS, STRICT,
                                           VectorSlotPair(), ALLOW_TAIL_CALLS));
   Node* function = node->InputAt(static_cast<int>(arity - 1));
   while (--arity != 0) {
     node->ReplaceInput(static_cast<int>(arity),
                        node->InputAt(static_cast<int>(arity - 1)));
   }
@@ skipping 56 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSIntrinsicLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8