[builtins] Port parameter and argument-related code stubs to CSA

src/arm64/code-stubs-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 3544 matching lines @@
   }
 
   Label fast_elements_case;
   __ CompareAndBranch(kind, FAST_ELEMENTS, eq, &fast_elements_case);
   GenerateCase(masm, FAST_HOLEY_ELEMENTS);
 
   __ Bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
-void FastNewRestParameterStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- x1 : function
-  //  -- cp : context
-  //  -- fp : frame pointer
-  //  -- lr : return address
-  // -----------------------------------
-  __ AssertFunction(x1);
-
-  // Make x2 point to the JavaScript frame.
-  __ Mov(x2, fp);
-  if (skip_stub_frame()) {
-    // For Ignition we need to skip the handler/stub frame to reach the
-    // JavaScript frame for the function.
-    __ Ldr(x2, MemOperand(x2, StandardFrameConstants::kCallerFPOffset));
-  }
-  if (FLAG_debug_code) {
-    Label ok;
-    __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kFunctionOffset));
-    __ Cmp(x3, x1);
-    __ B(eq, &ok);
-    __ Abort(kInvalidFrameForFastNewRestArgumentsStub);
-    __ Bind(&ok);
-  }
-
-  // Check if we have rest parameters (only possible if we have an
-  // arguments adaptor frame below the function frame).
-  Label no_rest_parameters;
-  __ Ldr(x2, MemOperand(x2, CommonFrameConstants::kCallerFPOffset));
-  __ Ldr(x3, MemOperand(x2, CommonFrameConstants::kContextOrFrameTypeOffset));
-  __ Cmp(x3, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
-  __ B(ne, &no_rest_parameters);
-
-  // Check if the arguments adaptor frame contains more arguments than
-  // specified by the function's internal formal parameter count.
-  Label rest_parameters;
-  __ Ldrsw(x0, UntagSmiMemOperand(
-                   x2, ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ Ldr(x3, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset));
-  __ Ldrsw(
-      x3, FieldMemOperand(x3, SharedFunctionInfo::kFormalParameterCountOffset));
-  __ Subs(x0, x0, x3);
-  __ B(gt, &rest_parameters);
-
-  // Return an empty rest parameter array.
-  __ Bind(&no_rest_parameters);
-  {
-    // ----------- S t a t e -------------
-    //  -- cp : context
-    //  -- lr : return address
-    // -----------------------------------
-
-    // Allocate an empty rest parameter array.
-    Label allocate, done_allocate;
-    __ Allocate(JSArray::kSize, x0, x1, x2, &allocate, NO_ALLOCATION_FLAGS);
-    __ Bind(&done_allocate);
-
-    // Setup the rest parameter array in x0.
-    __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, x1);
-    __ Str(x1, FieldMemOperand(x0, JSArray::kMapOffset));
-    __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex);
-    __ Str(x1, FieldMemOperand(x0, JSArray::kPropertiesOffset));
-    __ Str(x1, FieldMemOperand(x0, JSArray::kElementsOffset));
-    __ Mov(x1, Smi::kZero);
-    __ Str(x1, FieldMemOperand(x0, JSArray::kLengthOffset));
-    STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize);
-    __ Ret();
-
-    // Fall back to %AllocateInNewSpace.
-    __ Bind(&allocate);
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ Push(Smi::FromInt(JSArray::kSize));
-      __ CallRuntime(Runtime::kAllocateInNewSpace);
-    }
-    __ B(&done_allocate);
-  }
-
-  __ Bind(&rest_parameters);
-  {
-    // Compute the pointer to the first rest parameter (skippping the receiver).
-    __ Add(x2, x2, Operand(x0, LSL, kPointerSizeLog2));
-    __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize);
-
-    // ----------- S t a t e -------------
-    //  -- cp : context
-    //  -- x0 : number of rest parameters
-    //  -- x1 : function
-    //  -- x2 : pointer to first rest parameters
-    //  -- lr : return address
-    // -----------------------------------
-
-    // Allocate space for the rest parameter array plus the backing store.
-    Label allocate, done_allocate;
-    __ Mov(x6, JSArray::kSize + FixedArray::kHeaderSize);
-    __ Add(x6, x6, Operand(x0, LSL, kPointerSizeLog2));
-    __ Allocate(x6, x3, x4, x5, &allocate, NO_ALLOCATION_FLAGS);
-    __ Bind(&done_allocate);
-
-    // Compute arguments.length in x6.
-    __ SmiTag(x6, x0);
-
-    // Setup the elements array in x3.
-    __ LoadRoot(x1, Heap::kFixedArrayMapRootIndex);
-    __ Str(x1, FieldMemOperand(x3, FixedArray::kMapOffset));
-    __ Str(x6, FieldMemOperand(x3, FixedArray::kLengthOffset));
-    __ Add(x4, x3, FixedArray::kHeaderSize);
-    {
-      Label loop, done_loop;
-      __ Add(x0, x4, Operand(x0, LSL, kPointerSizeLog2));
-      __ Bind(&loop);
-      __ Cmp(x4, x0);
-      __ B(eq, &done_loop);
-      __ Ldr(x5, MemOperand(x2, 0 * kPointerSize));
-      __ Str(x5, FieldMemOperand(x4, 0 * kPointerSize));
-      __ Sub(x2, x2, Operand(1 * kPointerSize));
-      __ Add(x4, x4, Operand(1 * kPointerSize));
-      __ B(&loop);
-      __ Bind(&done_loop);
-    }
-
-    // Setup the rest parameter array in x0.
-    __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, x1);
-    __ Str(x1, FieldMemOperand(x0, JSArray::kMapOffset));
-    __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex);
-    __ Str(x1, FieldMemOperand(x0, JSArray::kPropertiesOffset));
-    __ Str(x3, FieldMemOperand(x0, JSArray::kElementsOffset));
-    __ Str(x6, FieldMemOperand(x0, JSArray::kLengthOffset));
-    STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize);
-    __ Ret();
-
-    // Fall back to %AllocateInNewSpace (if not too big).
-    Label too_big_for_new_space;
-    __ Bind(&allocate);
-    __ Cmp(x6, Operand(kMaxRegularHeapObjectSize));
-    __ B(gt, &too_big_for_new_space);
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ SmiTag(x0);
-      __ SmiTag(x6);
-      __ Push(x0, x2, x6);
-      __ CallRuntime(Runtime::kAllocateInNewSpace);
-      __ Mov(x3, x0);
-      __ Pop(x2, x0);
-      __ SmiUntag(x0);
-    }
-    __ B(&done_allocate);
-
-    // Fall back to %NewRestParameter.
-    __ Bind(&too_big_for_new_space);
-    __ Push(x1);
-    __ TailCallRuntime(Runtime::kNewRestParameter);
-  }
-}
-
-
-void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- x1 : function
-  //  -- cp : context
-  //  -- fp : frame pointer
-  //  -- lr : return address
-  // -----------------------------------
-  __ AssertFunction(x1);
-
-  // Make x6 point to the JavaScript frame.
-  __ Mov(x6, fp);
-  if (skip_stub_frame()) {
-    // For Ignition we need to skip the handler/stub frame to reach the
-    // JavaScript frame for the function.
-    __ Ldr(x6, MemOperand(x6, StandardFrameConstants::kCallerFPOffset));
-  }
-  if (FLAG_debug_code) {
-    Label ok;
-    __ Ldr(x3, MemOperand(x6, StandardFrameConstants::kFunctionOffset));
-    __ Cmp(x3, x1);
-    __ B(eq, &ok);
-    __ Abort(kInvalidFrameForFastNewRestArgumentsStub);
-    __ Bind(&ok);
-  }
-
-  // TODO(bmeurer): Cleanup to match the FastNewStrictArgumentsStub.
-  __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset));
-  __ Ldrsw(
-      x2, FieldMemOperand(x2, SharedFunctionInfo::kFormalParameterCountOffset));
-  __ Add(x3, x6, Operand(x2, LSL, kPointerSizeLog2));
-  __ Add(x3, x3, Operand(StandardFrameConstants::kCallerSPOffset));
-  __ SmiTag(x2);
-
-  // x1 : function
-  // x2 : number of parameters (tagged)
-  // x3 : parameters pointer
-  // x6 : JavaScript frame pointer
-  //
-  // Returns pointer to result object in x0.
-
-  // Make an untagged copy of the parameter count.
-  // Note: arg_count_smi is an alias of param_count_smi.
-  Register function = x1;
-  Register arg_count_smi = x2;
-  Register param_count_smi = x2;
-  Register recv_arg = x3;
-  Register param_count = x7;
-  __ SmiUntag(param_count, param_count_smi);
-
-  // Check if the calling frame is an arguments adaptor frame.
-  Register caller_fp = x11;
-  Register caller_ctx = x12;
-  Label runtime;
-  Label adaptor_frame, try_allocate;
-  __ Ldr(caller_fp, MemOperand(x6, StandardFrameConstants::kCallerFPOffset));
-  __ Ldr(
-      caller_ctx,
-      MemOperand(caller_fp, CommonFrameConstants::kContextOrFrameTypeOffset));
-  __ Cmp(caller_ctx, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
-  __ B(eq, &adaptor_frame);
-
-  // No adaptor, parameter count = argument count.
-
-  //   x1   function      function pointer
-  //   x2   arg_count_smi number of function arguments (smi)
-  //   x3   recv_arg      pointer to receiver arguments
-  //   x4   mapped_params number of mapped params, min(params, args) (uninit)
-  //   x7   param_count   number of function parameters
-  //   x11  caller_fp     caller's frame pointer
-  //   x14  arg_count     number of function arguments (uninit)
-
-  Register arg_count = x14;
-  Register mapped_params = x4;
-  __ Mov(arg_count, param_count);
-  __ Mov(mapped_params, param_count);
-  __ B(&try_allocate);
-
-  // We have an adaptor frame. Patch the parameters pointer.
-  __ Bind(&adaptor_frame);
-  __ Ldr(arg_count_smi,
-         MemOperand(caller_fp,
-                    ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ SmiUntag(arg_count, arg_count_smi);
-  __ Add(x10, caller_fp, Operand(arg_count, LSL, kPointerSizeLog2));
-  __ Add(recv_arg, x10, StandardFrameConstants::kCallerSPOffset);
-
-  // Compute the mapped parameter count = min(param_count, arg_count)
-  __ Cmp(param_count, arg_count);
-  __ Csel(mapped_params, param_count, arg_count, lt);
-
-  __ Bind(&try_allocate);
-
-  //   x0   alloc_obj     pointer to allocated objects: param map, backing
-  //                      store, arguments (uninit)
-  //   x1   function      function pointer
-  //   x2   arg_count_smi number of function arguments (smi)
-  //   x3   recv_arg      pointer to receiver arguments
-  //   x4   mapped_params number of mapped parameters, min(params, args)
-  //   x7   param_count   number of function parameters
-  //   x10  size          size of objects to allocate (uninit)
-  //   x14  arg_count     number of function arguments
-
-  // Compute the size of backing store, parameter map, and arguments object.
-  // 1. Parameter map, has two extra words containing context and backing
-  // store.
-  const int kParameterMapHeaderSize =
-      FixedArray::kHeaderSize + 2 * kPointerSize;
-
-  // Calculate the parameter map size, assuming it exists.
-  Register size = x10;
-  __ Mov(size, Operand(mapped_params, LSL, kPointerSizeLog2));
-  __ Add(size, size, kParameterMapHeaderSize);
-
-  // If there are no mapped parameters, set the running size total to zero.
-  // Otherwise, use the parameter map size calculated earlier.
-  __ Cmp(mapped_params, 0);
-  __ CzeroX(size, eq);
-
-  // 2. Add the size of the backing store and arguments object.
-  __ Add(size, size, Operand(arg_count, LSL, kPointerSizeLog2));
-  __ Add(size, size, FixedArray::kHeaderSize + JSSloppyArgumentsObject::kSize);
-
-  // Do the allocation of all three objects in one go. Assign this to x0, as it
-  // will be returned to the caller.
-  Register alloc_obj = x0;
-  __ Allocate(size, alloc_obj, x11, x12, &runtime, NO_ALLOCATION_FLAGS);
-
-  // Get the arguments boilerplate from the current (global) context.
-
-  //   x0   alloc_obj       pointer to allocated objects (param map, backing
-  //                        store, arguments)
-  //   x1   function        function pointer
-  //   x2   arg_count_smi   number of function arguments (smi)
-  //   x3   recv_arg        pointer to receiver arguments
-  //   x4   mapped_params   number of mapped parameters, min(params, args)
-  //   x7   param_count     number of function parameters
-  //   x11  sloppy_args_map offset to args (or aliased args) map (uninit)
-  //   x14  arg_count       number of function arguments
-
-  Register global_ctx = x10;
-  Register sloppy_args_map = x11;
-  Register aliased_args_map = x10;
-  __ Ldr(global_ctx, NativeContextMemOperand());
-
-  __ Ldr(sloppy_args_map,
-         ContextMemOperand(global_ctx, Context::SLOPPY_ARGUMENTS_MAP_INDEX));
-  __ Ldr(
-      aliased_args_map,
-      ContextMemOperand(global_ctx, Context::FAST_ALIASED_ARGUMENTS_MAP_INDEX));
-  __ Cmp(mapped_params, 0);
-  __ CmovX(sloppy_args_map, aliased_args_map, ne);
-
-  // Copy the JS object part.
-  __ Str(sloppy_args_map, FieldMemOperand(alloc_obj, JSObject::kMapOffset));
-  __ LoadRoot(x10, Heap::kEmptyFixedArrayRootIndex);
-  __ Str(x10, FieldMemOperand(alloc_obj, JSObject::kPropertiesOffset));
-  __ Str(x10, FieldMemOperand(alloc_obj, JSObject::kElementsOffset));
-
-  // Set up the callee in-object property.
-  __ AssertNotSmi(function);
-  __ Str(function,
-         FieldMemOperand(alloc_obj, JSSloppyArgumentsObject::kCalleeOffset));
-
-  // Use the length and set that as an in-object property.
-  __ Str(arg_count_smi,
-         FieldMemOperand(alloc_obj, JSSloppyArgumentsObject::kLengthOffset));
-
-  // Set up the elements pointer in the allocated arguments object.
-  // If we allocated a parameter map, "elements" will point there, otherwise
-  // it will point to the backing store.
-
-  //   x0   alloc_obj     pointer to allocated objects (param map, backing
-  //                      store, arguments)
-  //   x1   function      function pointer
-  //   x2   arg_count_smi number of function arguments (smi)
-  //   x3   recv_arg      pointer to receiver arguments
-  //   x4   mapped_params number of mapped parameters, min(params, args)
-  //   x5   elements      pointer to parameter map or backing store (uninit)
-  //   x6   backing_store pointer to backing store (uninit)
-  //   x7   param_count   number of function parameters
-  //   x14  arg_count     number of function arguments
-
-  Register elements = x5;
-  __ Add(elements, alloc_obj, JSSloppyArgumentsObject::kSize);
-  __ Str(elements, FieldMemOperand(alloc_obj, JSObject::kElementsOffset));
-
-  // Initialize parameter map. If there are no mapped arguments, we're done.
-  Label skip_parameter_map;
-  __ Cmp(mapped_params, 0);
-  // Set up backing store address, because it is needed later for filling in
-  // the unmapped arguments.
-  Register backing_store = x6;
-  __ CmovX(backing_store, elements, eq);
-  __ B(eq, &skip_parameter_map);
-
-  __ LoadRoot(x10, Heap::kSloppyArgumentsElementsMapRootIndex);
-  __ Str(x10, FieldMemOperand(elements, FixedArray::kMapOffset));
-  __ Add(x10, mapped_params, 2);
-  __ SmiTag(x10);
-  __ Str(x10, FieldMemOperand(elements, FixedArray::kLengthOffset));
-  __ Str(cp, FieldMemOperand(elements,
-                             FixedArray::kHeaderSize + 0 * kPointerSize));
-  __ Add(x10, elements, Operand(mapped_params, LSL, kPointerSizeLog2));
-  __ Add(x10, x10, kParameterMapHeaderSize);
-  __ Str(x10, FieldMemOperand(elements,
-                              FixedArray::kHeaderSize + 1 * kPointerSize));
-
-  // Copy the parameter slots and the holes in the arguments.
-  // We need to fill in mapped_parameter_count slots. Then index the context,
-  // where parameters are stored in reverse order, at:
-  //
-  //   MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS + parameter_count - 1
-  //
-  // The mapped parameter thus needs to get indices:
-  //
-  //   MIN_CONTEXT_SLOTS + parameter_count - 1 ..
-  //     MIN_CONTEXT_SLOTS + parameter_count - mapped_parameter_count
-  //
-  // We loop from right to left.
-
-  //   x0   alloc_obj     pointer to allocated objects (param map, backing
-  //                      store, arguments)
-  //   x1   function      function pointer
-  //   x2   arg_count_smi number of function arguments (smi)
-  //   x3   recv_arg      pointer to receiver arguments
-  //   x4   mapped_params number of mapped parameters, min(params, args)
-  //   x5   elements      pointer to parameter map or backing store (uninit)
-  //   x6   backing_store pointer to backing store (uninit)
-  //   x7   param_count   number of function parameters
-  //   x11  loop_count    parameter loop counter (uninit)
-  //   x12  index         parameter index (smi, uninit)
-  //   x13  the_hole      hole value (uninit)
-  //   x14  arg_count     number of function arguments
-
-  Register loop_count = x11;
-  Register index = x12;
-  Register the_hole = x13;
-  Label parameters_loop, parameters_test;
-  __ Mov(loop_count, mapped_params);
-  __ Add(index, param_count, static_cast<int>(Context::MIN_CONTEXT_SLOTS));
-  __ Sub(index, index, mapped_params);
-  __ SmiTag(index);
-  __ LoadRoot(the_hole, Heap::kTheHoleValueRootIndex);
-  __ Add(backing_store, elements, Operand(loop_count, LSL, kPointerSizeLog2));
-  __ Add(backing_store, backing_store, kParameterMapHeaderSize);
-
-  __ B(&parameters_test);
-
-  __ Bind(&parameters_loop);
-  __ Sub(loop_count, loop_count, 1);
-  __ Mov(x10, Operand(loop_count, LSL, kPointerSizeLog2));
-  __ Add(x10, x10, kParameterMapHeaderSize - kHeapObjectTag);
-  __ Str(index, MemOperand(elements, x10));
-  __ Sub(x10, x10, kParameterMapHeaderSize - FixedArray::kHeaderSize);
-  __ Str(the_hole, MemOperand(backing_store, x10));
-  __ Add(index, index, Smi::FromInt(1));
-  __ Bind(&parameters_test);
-  __ Cbnz(loop_count, &parameters_loop);
-
-  __ Bind(&skip_parameter_map);
-  // Copy arguments header and remaining slots (if there are any.)
-  __ LoadRoot(x10, Heap::kFixedArrayMapRootIndex);
-  __ Str(x10, FieldMemOperand(backing_store, FixedArray::kMapOffset));
-  __ Str(arg_count_smi, FieldMemOperand(backing_store,
-                                        FixedArray::kLengthOffset));
-
-  //   x0   alloc_obj     pointer to allocated objects (param map, backing
-  //                      store, arguments)
-  //   x1   function      function pointer
-  //   x2   arg_count_smi number of function arguments (smi)
-  //   x3   recv_arg      pointer to receiver arguments
-  //   x4   mapped_params number of mapped parameters, min(params, args)
-  //   x6   backing_store pointer to backing store (uninit)
-  //   x14  arg_count     number of function arguments
-
-  Label arguments_loop, arguments_test;
-  __ Mov(x10, mapped_params);
-  __ Sub(recv_arg, recv_arg, Operand(x10, LSL, kPointerSizeLog2));
-  __ B(&arguments_test);
-
-  __ Bind(&arguments_loop);
-  __ Sub(recv_arg, recv_arg, kPointerSize);
-  __ Ldr(x11, MemOperand(recv_arg));
-  __ Add(x12, backing_store, Operand(x10, LSL, kPointerSizeLog2));
-  __ Str(x11, FieldMemOperand(x12, FixedArray::kHeaderSize));
-  __ Add(x10, x10, 1);
-
-  __ Bind(&arguments_test);
-  __ Cmp(x10, arg_count);
-  __ B(lt, &arguments_loop);
-
-  __ Ret();
-
-  // Do the runtime call to allocate the arguments object.
-  __ Bind(&runtime);
-  __ Push(function, recv_arg, arg_count_smi);
-  __ TailCallRuntime(Runtime::kNewSloppyArguments);
-}
-
-
-void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- x1 : function
-  //  -- cp : context
-  //  -- fp : frame pointer
-  //  -- lr : return address
-  // -----------------------------------
-  __ AssertFunction(x1);
-
-  // Make x2 point to the JavaScript frame.
-  __ Mov(x2, fp);
-  if (skip_stub_frame()) {
-    // For Ignition we need to skip the handler/stub frame to reach the
-    // JavaScript frame for the function.
-    __ Ldr(x2, MemOperand(x2, StandardFrameConstants::kCallerFPOffset));
-  }
-  if (FLAG_debug_code) {
-    Label ok;
-    __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kFunctionOffset));
-    __ Cmp(x3, x1);
-    __ B(eq, &ok);
-    __ Abort(kInvalidFrameForFastNewRestArgumentsStub);
-    __ Bind(&ok);
-  }
-
-  // Check if we have an arguments adaptor frame below the function frame.
-  Label arguments_adaptor, arguments_done;
-  __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kCallerFPOffset));
-  __ Ldr(x4, MemOperand(x3, CommonFrameConstants::kContextOrFrameTypeOffset));
-  __ Cmp(x4, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
-  __ B(eq, &arguments_adaptor);
-  {
-    __ Ldr(x4, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset));
-    __ Ldrsw(x0, FieldMemOperand(
-                     x4, SharedFunctionInfo::kFormalParameterCountOffset));
-    __ Add(x2, x2, Operand(x0, LSL, kPointerSizeLog2));
-    __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize);
-  }
-  __ B(&arguments_done);
-  __ Bind(&arguments_adaptor);
-  {
-    __ Ldrsw(x0, UntagSmiMemOperand(
-                     x3, ArgumentsAdaptorFrameConstants::kLengthOffset));
-    __ Add(x2, x3, Operand(x0, LSL, kPointerSizeLog2));
-    __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize);
-  }
-  __ Bind(&arguments_done);
-
-  // ----------- S t a t e -------------
-  //  -- cp : context
-  //  -- x0 : number of rest parameters
-  //  -- x1 : function
-  //  -- x2 : pointer to first rest parameters
-  //  -- lr : return address
-  // -----------------------------------
-
-  // Allocate space for the strict arguments object plus the backing store.
-  Label allocate, done_allocate;
-  __ Mov(x6, JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize);
-  __ Add(x6, x6, Operand(x0, LSL, kPointerSizeLog2));
-  __ Allocate(x6, x3, x4, x5, &allocate, NO_ALLOCATION_FLAGS);
-  __ Bind(&done_allocate);
-
-  // Compute arguments.length in x6.
-  __ SmiTag(x6, x0);
-
-  // Setup the elements array in x3.
-  __ LoadRoot(x1, Heap::kFixedArrayMapRootIndex);
-  __ Str(x1, FieldMemOperand(x3, FixedArray::kMapOffset));
-  __ Str(x6, FieldMemOperand(x3, FixedArray::kLengthOffset));
-  __ Add(x4, x3, FixedArray::kHeaderSize);
-  {
-    Label loop, done_loop;
-    __ Add(x0, x4, Operand(x0, LSL, kPointerSizeLog2));
-    __ Bind(&loop);
-    __ Cmp(x4, x0);
-    __ B(eq, &done_loop);
-    __ Ldr(x5, MemOperand(x2, 0 * kPointerSize));
-    __ Str(x5, FieldMemOperand(x4, 0 * kPointerSize));
-    __ Sub(x2, x2, Operand(1 * kPointerSize));
-    __ Add(x4, x4, Operand(1 * kPointerSize));
-    __ B(&loop);
-    __ Bind(&done_loop);
-  }
-
-  // Setup the strict arguments object in x0.
-  __ LoadNativeContextSlot(Context::STRICT_ARGUMENTS_MAP_INDEX, x1);
-  __ Str(x1, FieldMemOperand(x0, JSStrictArgumentsObject::kMapOffset));
-  __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex);
-  __ Str(x1, FieldMemOperand(x0, JSStrictArgumentsObject::kPropertiesOffset));
-  __ Str(x3, FieldMemOperand(x0, JSStrictArgumentsObject::kElementsOffset));
-  __ Str(x6, FieldMemOperand(x0, JSStrictArgumentsObject::kLengthOffset));
-  STATIC_ASSERT(JSStrictArgumentsObject::kSize == 4 * kPointerSize);
-  __ Ret();
-
-  // Fall back to %AllocateInNewSpace (if not too big).
-  Label too_big_for_new_space;
-  __ Bind(&allocate);
-  __ Cmp(x6, Operand(kMaxRegularHeapObjectSize));
-  __ B(gt, &too_big_for_new_space);
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ SmiTag(x0);
-    __ SmiTag(x6);
-    __ Push(x0, x2, x6);
-    __ CallRuntime(Runtime::kAllocateInNewSpace);
-    __ Mov(x3, x0);
-    __ Pop(x2, x0);
-    __ SmiUntag(x0);
-  }
-  __ B(&done_allocate);
-
-  // Fall back to %NewStrictArguments.
-  __ Bind(&too_big_for_new_space);
-  __ Push(x1);
-  __ TailCallRuntime(Runtime::kNewStrictArguments);
-}
-
-
 // The number of register that CallApiFunctionAndReturn will need to save on
 // the stack. The space for these registers need to be allocated in the
 // ExitFrame before calling CallApiFunctionAndReturn.
 static const int kCallApiFunctionSpillSpace = 4;
 
 
 static int AddressOffset(ExternalReference ref0, ExternalReference ref1) {
   return static_cast<int>(ref0.address() - ref1.address());
 }
 
@@ skipping 328 matching lines @@
                            kStackUnwindSpace, NULL, spill_offset,
                            return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64