Move hash code from hidden string to a private symbol

src/arm/macro-assembler-arm.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 <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
@@ skipping 1541 matching lines @@
   // hash = hash + (hash << 2);
   add(t0, t0, Operand(t0, LSL, 2));
   // hash = hash ^ (hash >> 4);
   eor(t0, t0, Operand(t0, LSR, 4));
   // hash = hash * 2057;
   mov(scratch, Operand(t0, LSL, 11));
   add(t0, t0, Operand(t0, LSL, 3));
   add(t0, t0, scratch);
   // hash = hash ^ (hash >> 16);
   eor(t0, t0, Operand(t0, LSR, 16));
+  bic(t0, t0, Operand(0xc0000000u));
 }
 
 
 void MacroAssembler::LoadFromNumberDictionary(Label* miss,
                                               Register elements,
                                               Register key,
                                               Register result,
                                               Register t0,
                                               Register t1,
                                               Register t2) {
@@ skipping 2336 matching lines @@
     }
   }
   if (mag.shift > 0) mov(result, Operand(result, ASR, mag.shift));
   add(result, result, Operand(dividend, LSR, 31));
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM