MIPS: Fix `[proxies] fix access issue when having proxies on the prototype-chain of global objects.`

src/crankshaft/mips64/lithium-codegen-mips64.cc

 // Copyright 2012 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/crankshaft/mips64/lithium-codegen-mips64.h"
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/crankshaft/hydrogen-osr.h"
 #include "src/crankshaft/mips64/lithium-gap-resolver-mips64.h"
@@ skipping 2656 matching lines @@
   // will be ruled out below.
   if (instr->hydrogen()->ObjectNeedsSmiCheck()) {
     __ SmiTst(object, at);
     EmitFalseBranch(instr, eq, at, Operand(zero_reg));
   }
 
   // Loop through the {object}s prototype chain looking for the {prototype}.
   __ ld(object_map, FieldMemOperand(object, HeapObject::kMapOffset));
   Label loop;
   __ bind(&loop);
+
+  // Deoptimize if the object needs to be access checked.
+  __ lbu(object_instance_type,
+         FieldMemOperand(object_map, Map::kBitFieldOffset));
+  __ And(object_instance_type, object_instance_type,
+         Operand(1 << Map::kIsAccessCheckNeeded));
+  DeoptimizeIf(ne, instr, Deoptimizer::kAccessCheck, object_instance_type,
+               Operand(zero_reg));
   __ lbu(object_instance_type,
          FieldMemOperand(object_map, Map::kInstanceTypeOffset));
   DeoptimizeIf(eq, instr, Deoptimizer::kProxy, object_instance_type,
                Operand(JS_PROXY_TYPE));
+
   __ ld(object_prototype, FieldMemOperand(object_map, Map::kPrototypeOffset));
   EmitTrueBranch(instr, eq, object_prototype, Operand(prototype));
   __ LoadRoot(at, Heap::kNullValueRootIndex);
   EmitFalseBranch(instr, eq, object_prototype, Operand(at));
   __ Branch(&loop, USE_DELAY_SLOT);
   __ ld(object_map, FieldMemOperand(object_prototype,
                                     HeapObject::kMapOffset));  // In delay slot.
 }
 
 
@@ skipping 3179 matching lines @@
   __ Push(at, ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8