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

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index 88140442e7aa8e5283de20eeeb76d7dbca30ff90..9bf941e4366e1f2f99a7a863851e72e69974fb2a 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -3309,515 +3309,6 @@ void InternalArrayConstructorStub::Generate(MacroAssembler* masm) {
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
-void FastNewRestParameterStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a1 : function
-  //  -- cp : context
-  //  -- fp : frame pointer
-  //  -- ra : return address
-  // -----------------------------------
-  __ AssertFunction(a1);
-
-  // Make a2 point to the JavaScript frame.
-  __ mov(a2, fp);
-  if (skip_stub_frame()) {
-    // For Ignition we need to skip the handler/stub frame to reach the
-    // JavaScript frame for the function.
-    __ ld(a2, MemOperand(a2, StandardFrameConstants::kCallerFPOffset));
-  }
-  if (FLAG_debug_code) {
-    Label ok;
-    __ ld(a3, MemOperand(a2, StandardFrameConstants::kFunctionOffset));
-    __ Branch(&ok, eq, a1, Operand(a3));
-    __ 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;
-  __ ld(a2, MemOperand(a2, StandardFrameConstants::kCallerFPOffset));
-  __ ld(a3, MemOperand(a2, CommonFrameConstants::kContextOrFrameTypeOffset));
-  __ Branch(&no_rest_parameters, ne, a3,
-            Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
-
-  // Check if the arguments adaptor frame contains more arguments than
-  // specified by the function's internal formal parameter count.
-  Label rest_parameters;
-  __ SmiLoadUntag(
-      a0, MemOperand(a2, ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ ld(a3, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(a3,
-        FieldMemOperand(a3, SharedFunctionInfo::kFormalParameterCountOffset));
-  __ Dsubu(a0, a0, Operand(a3));
-  __ Branch(&rest_parameters, gt, a0, Operand(zero_reg));
-
-  // Return an empty rest parameter array.
-  __ bind(&no_rest_parameters);
-  {
-    // ----------- S t a t e -------------
-    //  -- cp : context
-    //  -- ra : return address
-    // -----------------------------------
-
-    // Allocate an empty rest parameter array.
-    Label allocate, done_allocate;
-    __ Allocate(JSArray::kSize, v0, a0, a1, &allocate, NO_ALLOCATION_FLAGS);
-    __ bind(&done_allocate);
-
-    // Setup the rest parameter array in v0.
-    __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, a1);
-    __ sd(a1, FieldMemOperand(v0, JSArray::kMapOffset));
-    __ LoadRoot(a1, Heap::kEmptyFixedArrayRootIndex);
-    __ sd(a1, FieldMemOperand(v0, JSArray::kPropertiesOffset));
-    __ sd(a1, FieldMemOperand(v0, JSArray::kElementsOffset));
-    __ Move(a1, Smi::kZero);
-    __ Ret(USE_DELAY_SLOT);
-    __ sd(a1, FieldMemOperand(v0, JSArray::kLengthOffset));  // In delay slot
-    STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize);
-
-    // Fall back to %AllocateInNewSpace.
-    __ bind(&allocate);
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ Push(Smi::FromInt(JSArray::kSize));
-      __ CallRuntime(Runtime::kAllocateInNewSpace);
-    }
-    __ jmp(&done_allocate);
-  }
-
-  __ bind(&rest_parameters);
-  {
-    // Compute the pointer to the first rest parameter (skippping the receiver).
-    __ Dlsa(a2, a2, a0, kPointerSizeLog2);
-    __ Daddu(a2, a2, Operand(StandardFrameConstants::kCallerSPOffset -
-                             1 * kPointerSize));
-
-    // ----------- S t a t e -------------
-    //  -- cp : context
-    //  -- a0 : number of rest parameters
-    //  -- a1 : function
-    //  -- a2 : pointer to first rest parameters
-    //  -- ra : return address
-    // -----------------------------------
-
-    // Allocate space for the rest parameter array plus the backing store.
-    Label allocate, done_allocate;
-    __ li(a5, Operand(JSArray::kSize + FixedArray::kHeaderSize));
-    __ Dlsa(a5, a5, a0, kPointerSizeLog2);
-    __ Allocate(a5, v0, a3, a4, &allocate, NO_ALLOCATION_FLAGS);
-    __ bind(&done_allocate);
-
-    // Compute arguments.length in a4.
-    __ SmiTag(a4, a0);
-
-    // Setup the elements array in v0.
-    __ LoadRoot(at, Heap::kFixedArrayMapRootIndex);
-    __ sd(at, FieldMemOperand(v0, FixedArray::kMapOffset));
-    __ sd(a4, FieldMemOperand(v0, FixedArray::kLengthOffset));
-    __ Daddu(a3, v0, Operand(FixedArray::kHeaderSize));
-    {
-      Label loop, done_loop;
-      __ Dlsa(a1, a3, a0, kPointerSizeLog2);
-      __ bind(&loop);
-      __ Branch(&done_loop, eq, a1, Operand(a3));
-      __ ld(at, MemOperand(a2, 0 * kPointerSize));
-      __ sd(at, FieldMemOperand(a3, 0 * kPointerSize));
-      __ Dsubu(a2, a2, Operand(1 * kPointerSize));
-      __ Daddu(a3, a3, Operand(1 * kPointerSize));
-      __ Branch(&loop);
-      __ bind(&done_loop);
-    }
-
-    // Setup the rest parameter array in a3.
-    __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, at);
-    __ sd(at, FieldMemOperand(a3, JSArray::kMapOffset));
-    __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex);
-    __ sd(at, FieldMemOperand(a3, JSArray::kPropertiesOffset));
-    __ sd(v0, FieldMemOperand(a3, JSArray::kElementsOffset));
-    __ sd(a4, FieldMemOperand(a3, JSArray::kLengthOffset));
-    STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize);
-    __ Ret(USE_DELAY_SLOT);
-    __ mov(v0, a3);  // In delay slot
-
-    // Fall back to %AllocateInNewSpace (if not too big).
-    Label too_big_for_new_space;
-    __ bind(&allocate);
-    __ Branch(&too_big_for_new_space, gt, a5,
-              Operand(kMaxRegularHeapObjectSize));
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ SmiTag(a0);
-      __ SmiTag(a5);
-      __ Push(a0, a2, a5);
-      __ CallRuntime(Runtime::kAllocateInNewSpace);
-      __ Pop(a0, a2);
-      __ SmiUntag(a0);
-    }
-    __ jmp(&done_allocate);
-
-    // Fall back to %NewStrictArguments.
-    __ bind(&too_big_for_new_space);
-    __ Push(a1);
-    __ TailCallRuntime(Runtime::kNewStrictArguments);
-  }
-}
-
-
-void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a1 : function
-  //  -- cp : context
-  //  -- fp : frame pointer
-  //  -- ra : return address
-  // -----------------------------------
-  __ AssertFunction(a1);
-
-  // Make t0 point to the JavaScript frame.
-  __ mov(t0, fp);
-  if (skip_stub_frame()) {
-    // For Ignition we need to skip the handler/stub frame to reach the
-    // JavaScript frame for the function.
-    __ ld(t0, MemOperand(t0, StandardFrameConstants::kCallerFPOffset));
-  }
-  if (FLAG_debug_code) {
-    Label ok;
-    __ ld(a3, MemOperand(t0, StandardFrameConstants::kFunctionOffset));
-    __ Branch(&ok, eq, a1, Operand(a3));
-    __ Abort(kInvalidFrameForFastNewRestArgumentsStub);
-    __ bind(&ok);
-  }
-
-  // TODO(bmeurer): Cleanup to match the FastNewStrictArgumentsStub.
-  __ ld(a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(a2,
-         FieldMemOperand(a2, SharedFunctionInfo::kFormalParameterCountOffset));
-  __ Lsa(a3, t0, a2, kPointerSizeLog2);
-  __ Addu(a3, a3, Operand(StandardFrameConstants::kCallerSPOffset));
-  __ SmiTag(a2);
-
-  // a1 : function
-  // a2 : number of parameters (tagged)
-  // a3 : parameters pointer
-  // t0 : Javascript frame pointer
-  // Registers used over whole function:
-  //  a5 : arguments count (tagged)
-  //  a6 : mapped parameter count (tagged)
-
-  // Check if the calling frame is an arguments adaptor frame.
-  Label adaptor_frame, try_allocate, runtime;
-  __ ld(a4, MemOperand(t0, StandardFrameConstants::kCallerFPOffset));
-  __ ld(a0, MemOperand(a4, CommonFrameConstants::kContextOrFrameTypeOffset));
-  __ Branch(&adaptor_frame, eq, a0,
-            Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
-
-  // No adaptor, parameter count = argument count.
-  __ mov(a5, a2);
-  __ Branch(USE_DELAY_SLOT, &try_allocate);
-  __ mov(a6, a2);  // In delay slot.
-
-  // We have an adaptor frame. Patch the parameters pointer.
-  __ bind(&adaptor_frame);
-  __ ld(a5, MemOperand(a4, ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ SmiScale(t2, a5, kPointerSizeLog2);
-  __ Daddu(a4, a4, Operand(t2));
-  __ Daddu(a3, a4, Operand(StandardFrameConstants::kCallerSPOffset));
-
-  // a5 = argument count (tagged)
-  // a6 = parameter count (tagged)
-  // Compute the mapped parameter count = min(a6, a5) in a6.
-  __ mov(a6, a2);
-  __ Branch(&try_allocate, le, a6, Operand(a5));
-  __ mov(a6, a5);
-
-  __ bind(&try_allocate);
-
-  // Compute the sizes of backing store, parameter map, and arguments object.
-  // 1. Parameter map, has 2 extra words containing context and backing store.
-  const int kParameterMapHeaderSize =
-      FixedArray::kHeaderSize + 2 * kPointerSize;
-  // If there are no mapped parameters, we do not need the parameter_map.
-  Label param_map_size;
-  DCHECK_EQ(static_cast<Smi*>(0), Smi::kZero);
-  __ Branch(USE_DELAY_SLOT, &param_map_size, eq, a6, Operand(zero_reg));
-  __ mov(t1, zero_reg);  // In delay slot: param map size = 0 when a6 == 0.
-  __ SmiScale(t1, a6, kPointerSizeLog2);
-  __ daddiu(t1, t1, kParameterMapHeaderSize);
-  __ bind(&param_map_size);
-
-  // 2. Backing store.
-  __ SmiScale(t2, a5, kPointerSizeLog2);
-  __ Daddu(t1, t1, Operand(t2));
-  __ Daddu(t1, t1, Operand(FixedArray::kHeaderSize));
-
-  // 3. Arguments object.
-  __ Daddu(t1, t1, Operand(JSSloppyArgumentsObject::kSize));
-
-  // Do the allocation of all three objects in one go.
-  __ Allocate(t1, v0, t1, a4, &runtime, NO_ALLOCATION_FLAGS);
-
-  // v0 = address of new object(s) (tagged)
-  // a2 = argument count (smi-tagged)
-  // Get the arguments boilerplate from the current native context into a4.
-  const int kNormalOffset =
-      Context::SlotOffset(Context::SLOPPY_ARGUMENTS_MAP_INDEX);
-  const int kAliasedOffset =
-      Context::SlotOffset(Context::FAST_ALIASED_ARGUMENTS_MAP_INDEX);
-
-  __ ld(a4, NativeContextMemOperand());
-  Label skip2_ne, skip2_eq;
-  __ Branch(&skip2_ne, ne, a6, Operand(zero_reg));
-  __ ld(a4, MemOperand(a4, kNormalOffset));
-  __ bind(&skip2_ne);
-
-  __ Branch(&skip2_eq, eq, a6, Operand(zero_reg));
-  __ ld(a4, MemOperand(a4, kAliasedOffset));
-  __ bind(&skip2_eq);
-
-  // v0 = address of new object (tagged)
-  // a2 = argument count (smi-tagged)
-  // a4 = address of arguments map (tagged)
-  // a6 = mapped parameter count (tagged)
-  __ sd(a4, FieldMemOperand(v0, JSObject::kMapOffset));
-  __ LoadRoot(t1, Heap::kEmptyFixedArrayRootIndex);
-  __ sd(t1, FieldMemOperand(v0, JSObject::kPropertiesOffset));
-  __ sd(t1, FieldMemOperand(v0, JSObject::kElementsOffset));
-
-  // Set up the callee in-object property.
-  __ AssertNotSmi(a1);
-  __ sd(a1, FieldMemOperand(v0, JSSloppyArgumentsObject::kCalleeOffset));
-
-  // Use the length (smi tagged) and set that as an in-object property too.
-  __ AssertSmi(a5);
-  __ sd(a5, FieldMemOperand(v0, JSSloppyArgumentsObject::kLengthOffset));
-
-  // Set up the elements pointer in the allocated arguments object.
-  // If we allocated a parameter map, a4 will point there, otherwise
-  // it will point to the backing store.
-  __ Daddu(a4, v0, Operand(JSSloppyArgumentsObject::kSize));
-  __ sd(a4, FieldMemOperand(v0, JSObject::kElementsOffset));
-
-  // v0 = address of new object (tagged)
-  // a2 = argument count (tagged)
-  // a4 = address of parameter map or backing store (tagged)
-  // a6 = mapped parameter count (tagged)
-  // Initialize parameter map. If there are no mapped arguments, we're done.
-  Label skip_parameter_map;
-  Label skip3;
-  __ Branch(&skip3, ne, a6, Operand(Smi::kZero));
-  // Move backing store address to a1, because it is
-  // expected there when filling in the unmapped arguments.
-  __ mov(a1, a4);
-  __ bind(&skip3);
-
-  __ Branch(&skip_parameter_map, eq, a6, Operand(Smi::kZero));
-
-  __ LoadRoot(a5, Heap::kSloppyArgumentsElementsMapRootIndex);
-  __ sd(a5, FieldMemOperand(a4, FixedArray::kMapOffset));
-  __ Daddu(a5, a6, Operand(Smi::FromInt(2)));
-  __ sd(a5, FieldMemOperand(a4, FixedArray::kLengthOffset));
-  __ sd(cp, FieldMemOperand(a4, FixedArray::kHeaderSize + 0 * kPointerSize));
-  __ SmiScale(t2, a6, kPointerSizeLog2);
-  __ Daddu(a5, a4, Operand(t2));
-  __ Daddu(a5, a5, Operand(kParameterMapHeaderSize));
-  __ sd(a5, FieldMemOperand(a4, FixedArray::kHeaderSize + 1 * kPointerSize));
-
-  // Copy the parameter slots and the holes in the arguments.
-  // We need to fill in mapped_parameter_count slots. They index the context,
-  // where parameters are stored in reverse order, at
-  //   MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS+parameter_count-1
-  // The mapped parameter thus need to get indices
-  //   MIN_CONTEXT_SLOTS+parameter_count-1 ..
-  //       MIN_CONTEXT_SLOTS+parameter_count-mapped_parameter_count
-  // We loop from right to left.
-  Label parameters_loop, parameters_test;
-  __ mov(a5, a6);
-  __ Daddu(t1, a2, Operand(Smi::FromInt(Context::MIN_CONTEXT_SLOTS)));
-  __ Dsubu(t1, t1, Operand(a6));
-  __ LoadRoot(a7, Heap::kTheHoleValueRootIndex);
-  __ SmiScale(t2, a5, kPointerSizeLog2);
-  __ Daddu(a1, a4, Operand(t2));
-  __ Daddu(a1, a1, Operand(kParameterMapHeaderSize));
-
-  // a1 = address of backing store (tagged)
-  // a4 = address of parameter map (tagged)
-  // a0 = temporary scratch (a.o., for address calculation)
-  // t1 = loop variable (tagged)
-  // a7 = the hole value
-  __ jmp(&parameters_test);
-
-  __ bind(&parameters_loop);
-  __ Dsubu(a5, a5, Operand(Smi::FromInt(1)));
-  __ SmiScale(a0, a5, kPointerSizeLog2);
-  __ Daddu(a0, a0, Operand(kParameterMapHeaderSize - kHeapObjectTag));
-  __ Daddu(t2, a4, a0);
-  __ sd(t1, MemOperand(t2));
-  __ Dsubu(a0, a0, Operand(kParameterMapHeaderSize - FixedArray::kHeaderSize));
-  __ Daddu(t2, a1, a0);
-  __ sd(a7, MemOperand(t2));
-  __ Daddu(t1, t1, Operand(Smi::FromInt(1)));
-  __ bind(&parameters_test);
-  __ Branch(&parameters_loop, ne, a5, Operand(Smi::kZero));
-
-  // Restore t1 = argument count (tagged).
-  __ ld(a5, FieldMemOperand(v0, JSSloppyArgumentsObject::kLengthOffset));
-
-  __ bind(&skip_parameter_map);
-  // v0 = address of new object (tagged)
-  // a1 = address of backing store (tagged)
-  // a5 = argument count (tagged)
-  // a6 = mapped parameter count (tagged)
-  // t1 = scratch
-  // Copy arguments header and remaining slots (if there are any).
-  __ LoadRoot(t1, Heap::kFixedArrayMapRootIndex);
-  __ sd(t1, FieldMemOperand(a1, FixedArray::kMapOffset));
-  __ sd(a5, FieldMemOperand(a1, FixedArray::kLengthOffset));
-
-  Label arguments_loop, arguments_test;
-  __ SmiScale(t2, a6, kPointerSizeLog2);
-  __ Dsubu(a3, a3, Operand(t2));
-  __ jmp(&arguments_test);
-
-  __ bind(&arguments_loop);
-  __ Dsubu(a3, a3, Operand(kPointerSize));
-  __ ld(a4, MemOperand(a3, 0));
-  __ SmiScale(t2, a6, kPointerSizeLog2);
-  __ Daddu(t1, a1, Operand(t2));
-  __ sd(a4, FieldMemOperand(t1, FixedArray::kHeaderSize));
-  __ Daddu(a6, a6, Operand(Smi::FromInt(1)));
-
-  __ bind(&arguments_test);
-  __ Branch(&arguments_loop, lt, a6, Operand(a5));
-
-  // Return.
-  __ Ret();
-
-  // Do the runtime call to allocate the arguments object.
-  // a5 = argument count (tagged)
-  __ bind(&runtime);
-  __ Push(a1, a3, a5);
-  __ TailCallRuntime(Runtime::kNewSloppyArguments);
-}
-
-
-void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a1 : function
-  //  -- cp : context
-  //  -- fp : frame pointer
-  //  -- ra : return address
-  // -----------------------------------
-  __ AssertFunction(a1);
-
-  // Make a2 point to the JavaScript frame.
-  __ mov(a2, fp);
-  if (skip_stub_frame()) {
-    // For Ignition we need to skip the handler/stub frame to reach the
-    // JavaScript frame for the function.
-    __ ld(a2, MemOperand(a2, StandardFrameConstants::kCallerFPOffset));
-  }
-  if (FLAG_debug_code) {
-    Label ok;
-    __ ld(a3, MemOperand(a2, StandardFrameConstants::kFunctionOffset));
-    __ Branch(&ok, eq, a1, Operand(a3));
-    __ Abort(kInvalidFrameForFastNewRestArgumentsStub);
-    __ bind(&ok);
-  }
-
-  // Check if we have an arguments adaptor frame below the function frame.
-  Label arguments_adaptor, arguments_done;
-  __ ld(a3, MemOperand(a2, StandardFrameConstants::kCallerFPOffset));
-  __ ld(a0, MemOperand(a3, CommonFrameConstants::kContextOrFrameTypeOffset));
-  __ Branch(&arguments_adaptor, eq, a0,
-            Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
-  {
-    __ ld(a4, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-    __ lw(a0,
-          FieldMemOperand(a4, SharedFunctionInfo::kFormalParameterCountOffset));
-    __ Dlsa(a2, a2, a0, kPointerSizeLog2);
-    __ Daddu(a2, a2, Operand(StandardFrameConstants::kCallerSPOffset -
-                             1 * kPointerSize));
-  }
-  __ Branch(&arguments_done);
-  __ bind(&arguments_adaptor);
-  {
-    __ SmiLoadUntag(
-        a0, MemOperand(a3, ArgumentsAdaptorFrameConstants::kLengthOffset));
-    __ Dlsa(a2, a3, a0, kPointerSizeLog2);
-    __ Daddu(a2, a2, Operand(StandardFrameConstants::kCallerSPOffset -
-                             1 * kPointerSize));
-  }
-  __ bind(&arguments_done);
-
-  // ----------- S t a t e -------------
-  //  -- cp : context
-  //  -- a0 : number of rest parameters
-  //  -- a1 : function
-  //  -- a2 : pointer to first rest parameters
-  //  -- ra : return address
-  // -----------------------------------
-
-  // Allocate space for the rest parameter array plus the backing store.
-  Label allocate, done_allocate;
-  __ li(a5, Operand(JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize));
-  __ Dlsa(a5, a5, a0, kPointerSizeLog2);
-  __ Allocate(a5, v0, a3, a4, &allocate, NO_ALLOCATION_FLAGS);
-  __ bind(&done_allocate);
-
-  // Compute arguments.length in a4.
-  __ SmiTag(a4, a0);
-
-  // Setup the elements array in v0.
-  __ LoadRoot(at, Heap::kFixedArrayMapRootIndex);
-  __ sd(at, FieldMemOperand(v0, FixedArray::kMapOffset));
-  __ sd(a4, FieldMemOperand(v0, FixedArray::kLengthOffset));
-  __ Daddu(a3, v0, Operand(FixedArray::kHeaderSize));
-  {
-    Label loop, done_loop;
-    __ Dlsa(a1, a3, a0, kPointerSizeLog2);
-    __ bind(&loop);
-    __ Branch(&done_loop, eq, a1, Operand(a3));
-    __ ld(at, MemOperand(a2, 0 * kPointerSize));
-    __ sd(at, FieldMemOperand(a3, 0 * kPointerSize));
-    __ Dsubu(a2, a2, Operand(1 * kPointerSize));
-    __ Daddu(a3, a3, Operand(1 * kPointerSize));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Setup the strict arguments object in a3.
-  __ LoadNativeContextSlot(Context::STRICT_ARGUMENTS_MAP_INDEX, at);
-  __ sd(at, FieldMemOperand(a3, JSStrictArgumentsObject::kMapOffset));
-  __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex);
-  __ sd(at, FieldMemOperand(a3, JSStrictArgumentsObject::kPropertiesOffset));
-  __ sd(v0, FieldMemOperand(a3, JSStrictArgumentsObject::kElementsOffset));
-  __ sd(a4, FieldMemOperand(a3, JSStrictArgumentsObject::kLengthOffset));
-  STATIC_ASSERT(JSStrictArgumentsObject::kSize == 4 * kPointerSize);
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, a3);  // In delay slot
-
-  // Fall back to %AllocateInNewSpace (if not too big).
-  Label too_big_for_new_space;
-  __ bind(&allocate);
-  __ Branch(&too_big_for_new_space, gt, a5, Operand(kMaxRegularHeapObjectSize));
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ SmiTag(a0);
-    __ SmiTag(a5);
-    __ Push(a0, a2, a5);
-    __ CallRuntime(Runtime::kAllocateInNewSpace);
-    __ Pop(a0, a2);
-    __ SmiUntag(a0);
-  }
-  __ jmp(&done_allocate);
-
-  // Fall back to %NewStrictArguments.
-  __ bind(&too_big_for_new_space);
-  __ Push(a1);
-  __ TailCallRuntime(Runtime::kNewStrictArguments);
-}
-
-
 static int AddressOffset(ExternalReference ref0, ExternalReference ref1) {
   int64_t offset = (ref0.address() - ref1.address());
   DCHECK(static_cast<int>(offset) == offset);