| Index: src/compiler/js-generic-lowering.cc | 
| diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc | 
| index 699f7dd60569f8f6abe14767b1ca9325849ace9b..68cc1cea9053358bbd5a065647e8300b83bdc56e 100644 | 
| --- a/src/compiler/js-generic-lowering.cc | 
| +++ b/src/compiler/js-generic-lowering.cc | 
| @@ -292,6 +292,14 @@ REPLACE_UNIMPLEMENTED(JSDebugger) | 
| #undef REPLACE_UNIMPLEMENTED | 
|  | 
|  | 
| +static CallDescriptor::DeoptimizationSupport DeoptimizationSupportForNode( | 
| +    Node* node) { | 
| +  return OperatorProperties::CanLazilyDeoptimize(node->op()) | 
| +             ? CallDescriptor::kCanDeoptimize | 
| +             : CallDescriptor::kCannotDeoptimize; | 
| +} | 
| + | 
| + | 
| void JSGenericLowering::ReplaceWithCompareIC(Node* node, Token::Value token, | 
| bool pure) { | 
| BinaryOpICStub stub(isolate(), Token::ADD);  // TODO(mstarzinger): Hack. | 
| @@ -324,7 +332,8 @@ void JSGenericLowering::ReplaceWithCompareIC(Node* node, Token::Value token, | 
| void JSGenericLowering::ReplaceWithICStubCall(Node* node, | 
| HydrogenCodeStub* stub) { | 
| CodeStubInterfaceDescriptor* d = stub->GetInterfaceDescriptor(); | 
| -  CallDescriptor* desc = linkage()->GetStubCallDescriptor(d); | 
| +  CallDescriptor* desc = linkage()->GetStubCallDescriptor( | 
| +      d, 0, DeoptimizationSupportForNode(node)); | 
| Node* stub_code = CodeConstant(stub->GetCode()); | 
| PatchInsertInput(node, 0, stub_code); | 
| PatchOperator(node, common()->Call(desc)); | 
| @@ -355,12 +364,8 @@ void JSGenericLowering::ReplaceWithRuntimeCall(Node* node, | 
| Operator::Property props = node->op()->properties(); | 
| const Runtime::Function* fun = Runtime::FunctionForId(f); | 
| int nargs = (nargs_override < 0) ? fun->nargs : nargs_override; | 
| -  CallDescriptor::DeoptimizationSupport deopt = | 
| -      OperatorProperties::CanLazilyDeoptimize(node->op()) | 
| -          ? CallDescriptor::kCanDeoptimize | 
| -          : CallDescriptor::kCannotDeoptimize; | 
| -  CallDescriptor* desc = | 
| -      linkage()->GetRuntimeCallDescriptor(f, nargs, props, deopt); | 
| +  CallDescriptor* desc = linkage()->GetRuntimeCallDescriptor( | 
| +      f, nargs, props, DeoptimizationSupportForNode(node)); | 
| Node* ref = ExternalConstant(ExternalReference(f, isolate())); | 
| Node* arity = Int32Constant(nargs); | 
| if (!centrystub_constant_.is_set()) { | 
| @@ -508,7 +513,8 @@ Node* JSGenericLowering::LowerJSCallConstruct(Node* node) { | 
| int arity = OpParameter<int>(node); | 
| CallConstructStub stub(isolate(), NO_CALL_CONSTRUCTOR_FLAGS); | 
| CodeStubInterfaceDescriptor* d = GetInterfaceDescriptor(isolate(), &stub); | 
| -  CallDescriptor* desc = linkage()->GetStubCallDescriptor(d, arity); | 
| +  CallDescriptor* desc = linkage()->GetStubCallDescriptor( | 
| +      d, arity, DeoptimizationSupportForNode(node)); | 
| Node* stub_code = CodeConstant(stub.GetCode()); | 
| Node* construct = NodeProperties::GetValueInput(node, 0); | 
| PatchInsertInput(node, 0, stub_code); | 
| @@ -524,7 +530,8 @@ Node* JSGenericLowering::LowerJSCallFunction(Node* node) { | 
| CallParameters p = OpParameter<CallParameters>(node); | 
| CallFunctionStub stub(isolate(), p.arity - 2, p.flags); | 
| CodeStubInterfaceDescriptor* d = GetInterfaceDescriptor(isolate(), &stub); | 
| -  CallDescriptor* desc = linkage()->GetStubCallDescriptor(d, p.arity - 1); | 
| +  CallDescriptor* desc = linkage()->GetStubCallDescriptor( | 
| +      d, p.arity - 1, DeoptimizationSupportForNode(node)); | 
| Node* stub_code = CodeConstant(stub.GetCode()); | 
| PatchInsertInput(node, 0, stub_code); | 
| PatchOperator(node, common()->Call(desc)); | 
|  |