Use weak cell in monomorphic KeyedStore IC.

src/arm64/macro-assembler-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/base/bits.h"
 #include "src/base/division-by-constant.h"
@@ skipping 3770 matching lines @@
                               SmiCheckType smi_check_type) {
   if (smi_check_type == DO_SMI_CHECK) {
     JumpIfSmi(obj_map, fail);
   }
 
   CompareMap(obj_map, map);
   B(ne, fail);
 }
 
 
-void MacroAssembler::DispatchMap(Register obj,
-                                 Register scratch,
-                                 Handle<Map> map,
-                                 Handle<Code> success,
-                                 SmiCheckType smi_check_type) {
+void MacroAssembler::DispatchWeakMap(Register obj, Register scratch1,
+                                     Register scratch2, Handle<WeakCell> cell,
+                                     Handle<Code> success,
+                                     SmiCheckType smi_check_type) {
   Label fail;
   if (smi_check_type == DO_SMI_CHECK) {
     JumpIfSmi(obj, &fail);
   }
-  Ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset));
-  Cmp(scratch, Operand(map));
+  Ldr(scratch1, FieldMemOperand(obj, HeapObject::kMapOffset));
+  CmpWeakValue(scratch1, cell, scratch2);
   B(ne, &fail);
   Jump(success, RelocInfo::CODE_TARGET);
   Bind(&fail);
 }
 
 
 void MacroAssembler::CmpWeakValue(Register value, Handle<WeakCell> cell,
                                   Register scratch) {
   Mov(scratch, Operand(cell));
   Ldr(scratch, FieldMemOperand(scratch, WeakCell::kValueOffset));
@@ skipping 1582 matching lines @@
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64