HydrogenCodeStubs consume stack arguments via descriptor.

src/code-stubs.cc

 // Copyright 2012 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/code-stubs.h"
 
 #include <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/cpu-profiler.h"
@@ skipping 13 matching lines @@
   return Smi::FromInt(0);
 }
 
 
 CodeStubDescriptor::CodeStubDescriptor(CodeStub* stub)
     : call_descriptor_(stub->GetCallInterfaceDescriptor()),
       stack_parameter_count_(no_reg),
       hint_stack_parameter_count_(-1),
       function_mode_(NOT_JS_FUNCTION_STUB_MODE),
       deoptimization_handler_(NULL),
-      handler_arguments_mode_(DONT_PASS_ARGUMENTS),
       miss_handler_(),
       has_miss_handler_(false) {
   stub->InitializeDescriptor(this);
 }
 
 
 CodeStubDescriptor::CodeStubDescriptor(Isolate* isolate, uint32_t stub_key)
     : stack_parameter_count_(no_reg),
       hint_stack_parameter_count_(-1),
       function_mode_(NOT_JS_FUNCTION_STUB_MODE),
       deoptimization_handler_(NULL),
-      handler_arguments_mode_(DONT_PASS_ARGUMENTS),
       miss_handler_(),
       has_miss_handler_(false) {
   CodeStub::InitializeDescriptor(isolate, stub_key, this);
 }
 
 
 void CodeStubDescriptor::Initialize(Address deoptimization_handler,
                                     int hint_stack_parameter_count,
                                     StubFunctionMode function_mode) {
   deoptimization_handler_ = deoptimization_handler;
   hint_stack_parameter_count_ = hint_stack_parameter_count;
   function_mode_ = function_mode;
 }
 
 
 void CodeStubDescriptor::Initialize(Register stack_parameter_count,
                                     Address deoptimization_handler,
                                     int hint_stack_parameter_count,
-                                    StubFunctionMode function_mode,
-                                    HandlerArgumentsMode handler_mode) {
+                                    StubFunctionMode function_mode) {
   Initialize(deoptimization_handler, hint_stack_parameter_count, function_mode);
   stack_parameter_count_ = stack_parameter_count;
-  handler_arguments_mode_ = handler_mode;
 }
 
 
 bool CodeStub::FindCodeInCache(Code** code_out) {
   UnseededNumberDictionary* stubs = isolate()->heap()->code_stubs();
   int index = stubs->FindEntry(GetKey());
   if (index != UnseededNumberDictionary::kNotFound) {
     *code_out = Code::cast(stubs->ValueAt(index));
     return true;
   }
@@ skipping 1004 matching lines @@
 
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 }  // namespace internal
 }  // namespace v8