Distinguish slow from fast sloppy arguments

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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 1862 matching lines @@
   Register global_object = x10;
   Register global_ctx = x10;
   Register sloppy_args_map = x11;
   Register aliased_args_map = x10;
   __ Ldr(global_object, GlobalObjectMemOperand());
   __ Ldr(global_ctx, FieldMemOperand(global_object,
                                      GlobalObject::kNativeContextOffset));
 
   __ Ldr(sloppy_args_map,
          ContextMemOperand(global_ctx, Context::SLOPPY_ARGUMENTS_MAP_INDEX));
-  __ Ldr(aliased_args_map,
-         ContextMemOperand(global_ctx, Context::ALIASED_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.
@@ skipping 3931 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64