A64: Fix ArrayConstructorStub and remove GCC 4.8 specific flags.

src/a64/code-stubs-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5411 matching lines @@
                                 JSFunction::kPrototypeOrInitialMapOffset));
     // Will both indicate a NULL and a Smi.
     __ JumpIfSmi(x10, &unexpected_map);
     __ JumpIfObjectType(x10, x10, x11, MAP_TYPE, &map_ok);
     __ Bind(&unexpected_map);
     __ Abort(kUnexpectedInitialMapForArrayFunction);
     __ Bind(&map_ok);
 
     // In feedback_vector, we expect either undefined or a valid fixed array.
     Label okay_here;
-    Handle<Map> cell_map = masm->isolate()->factory()->cell_map();
+    Handle<Map> fixed_array_map = masm->isolate()->factory()->fixed_array_map();
     __ JumpIfRoot(feedback_vector, Heap::kUndefinedValueRootIndex, &okay_here);
-    __ Ldr(x10, FieldMemOperand(feedback_vector, Cell::kMapOffset));
-    __ Cmp(x10, Operand(cell_map));
+    __ Ldr(x10, FieldMemOperand(feedback_vector, FixedArray::kMapOffset));
+    __ Cmp(x10, Operand(fixed_array_map));
     __ Assert(eq, kExpectedFixedArrayInFeedbackVector);
 
     // slot_index should be a smi if we don't have undefined in feedback_vector.
     __ AssertSmi(slot_index);
 
     __ Bind(&okay_here);
   }
 
   Register allocation_site = x2;  // Overwrites feedback_vector.
   Register kind = x3;
@@ skipping 266 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64