X87: [proxies] fix access issue when having proxies on the prototype-chain of global objects.

src/crankshaft/x87/lithium-codegen-x87.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.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/crankshaft/x87/lithium-codegen-x87.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 2805 matching lines @@
   // will be ruled out below.
   if (instr->hydrogen()->ObjectNeedsSmiCheck()) {
     __ test(object, Immediate(kSmiTagMask));
     EmitFalseBranch(instr, zero);
   }
 
   // Loop through the {object}s prototype chain looking for the {prototype}.
   __ mov(object_map, FieldOperand(object, HeapObject::kMapOffset));
   Label loop;
   __ bind(&loop);
+
+  // Deoptimize if the object needs to be access checked.
+  __ test_b(FieldOperand(object_map, Map::kBitFieldOffset),
+            1 << Map::kIsAccessCheckNeeded);
+  DeoptimizeIf(not_zero, instr, Deoptimizer::kAccessCheck);
+  // Deoptimize for proxies.
   __ CmpInstanceType(object_map, JS_PROXY_TYPE);
   DeoptimizeIf(equal, instr, Deoptimizer::kProxy);
+
   __ mov(object_prototype, FieldOperand(object_map, Map::kPrototypeOffset));
   __ cmp(object_prototype, prototype);
   EmitTrueBranch(instr, equal);
   __ cmp(object_prototype, factory()->null_value());
   EmitFalseBranch(instr, equal);
   __ mov(object_map, FieldOperand(object_prototype, HeapObject::kMapOffset));
   __ jmp(&loop);
 }
 
 
@@ skipping 3230 matching lines @@
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87