Revert of Change calling convention of CallApiGetterStub to accept the AccessorInfo

src/mips/code-stubs-mips.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.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 5672 matching lines @@
   int32_t stack_space_offset = 4 * kPointerSize;
   stack_space = argc() + FCA::kArgsLength + 1;
   stack_space_offset = kInvalidStackOffset;
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space,
                            stack_space_offset, return_value_operand,
                            &context_restore_operand);
 }
 
 
 void CallApiGetterStub::Generate(MacroAssembler* masm) {
-  // Build v8::PropertyCallbackInfo::args_ array on the stack and push property
-  // name below the exit frame to make GC aware of them.
-  STATIC_ASSERT(PropertyCallbackArguments::kShouldThrowOnErrorIndex == 0);
-  STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 1);
-  STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 2);
-  STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 3);
-  STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 4);
-  STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 5);
-  STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 6);
-  STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 7);
+  // ----------- S t a t e -------------
+  //  -- sp[0]                        : name
+  //  -- sp[4 .. (4 + kArgsLength*4)] : v8::PropertyCallbackInfo::args_
+  //  -- ...
+  //  -- a2                           : api_function_address
+  // -----------------------------------
 
-  Register receiver = ApiGetterDescriptor::ReceiverRegister();
-  Register holder = ApiGetterDescriptor::HolderRegister();
-  Register callback = ApiGetterDescriptor::CallbackRegister();
-  Register scratch = t0;
-  Register scratch2 = t1;
-  Register scratch3 = t2;
-  DCHECK(!AreAliased(receiver, holder, callback, scratch, scratch2, scratch3));
+  Register api_function_address = ApiGetterDescriptor::function_address();
+  DCHECK(api_function_address.is(a2));
 
-  Register api_function_address = a2;
-
-  __ Push(receiver);
-  // Push data from AccessorInfo.
-  __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
-  __ li(scratch2, Operand(ExternalReference::isolate_address(isolate())));
-  __ lw(scratch3, FieldMemOperand(callback, AccessorInfo::kDataOffset));
-  __ Push(scratch3, scratch, scratch, scratch2, holder);
-  __ Push(Smi::FromInt(0));  // should_throw_on_error -> false
-  __ lw(scratch, FieldMemOperand(callback, AccessorInfo::kNameOffset));
-  __ push(scratch);
   // v8::PropertyCallbackInfo::args_ array and name handle.
   const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1;
 
   // Load address of v8::PropertyAccessorInfo::args_ array and name handle.
   __ mov(a0, sp);                              // a0 = Handle<Name>
   __ Addu(a1, a0, Operand(1 * kPointerSize));  // a1 = v8::PCI::args_
 
   const int kApiStackSpace = 1;
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ EnterExitFrame(false, kApiStackSpace);
 
   // Create v8::PropertyCallbackInfo object on the stack and initialize
   // it's args_ field.
   __ sw(a1, MemOperand(sp, 1 * kPointerSize));
   __ Addu(a1, sp, Operand(1 * kPointerSize));  // a1 = v8::PropertyCallbackInfo&
 
   ExternalReference thunk_ref =
       ExternalReference::invoke_accessor_getter_callback(isolate());
 
-  __ lw(scratch, FieldMemOperand(callback, AccessorInfo::kJsGetterOffset));
-  __ lw(api_function_address,
-        FieldMemOperand(scratch, Foreign::kForeignAddressOffset));
-
   // +3 is to skip prolog, return address and name handle.
   MemOperand return_value_operand(
       fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kPointerSize);
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,
                            kStackUnwindSpace, kInvalidStackOffset,
                            return_value_operand, NULL);
 }
 
 void AtomicsLoadStub::Generate(MacroAssembler* masm) {
   // TODO(binji)
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS