Reland "Merge cellspace into old pointer space"

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 1526 matching lines @@
   __ IsObjectJSObjectType(prototype, scratch1, scratch2, &slow);
 
   // Update the global instanceof or call site inlined cache with the current
   // map and function. The cached answer will be set when it is known below.
   if (HasCallSiteInlineCheck()) {
     // Patch the (relocated) inlined map check.
     __ GetRelocatedValueLocation(map_check_site, scratch1);
     // We have a cell, so need another level of dereferencing.
     __ Ldr(scratch1, MemOperand(scratch1));
     __ Str(map, FieldMemOperand(scratch1, Cell::kValueOffset));
+
+    __ Mov(x14, map);
+    // |scratch1| points at the beginning of the cell. Calculate the
+    // field containing the map.
+    __ Add(function, scratch1, Operand(Cell::kValueOffset - 1));
+    __ RecordWriteField(scratch1, Cell::kValueOffset, x14, function,
+                        kLRHasNotBeenSaved, kDontSaveFPRegs,
+                        OMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
   } else {
     __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex);
     __ StoreRoot(map, Heap::kInstanceofCacheMapRootIndex);
   }
 
   Label return_true, return_result;
   Register smi_value = scratch1;
   {
     // Loop through the prototype chain looking for the function prototype.
     Register chain_map = x1;
@@ skipping 4186 matching lines @@
                            kStackUnwindSpace, NULL, spill_offset,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64