MIPS: Use weak cells in map checks in polymorphic ICs.

src/mips/macro-assembler-mips.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_MIPS
 
@@ skipping 4015 matching lines @@
   li(match, Operand(cell));
   lw(match, FieldMemOperand(match, WeakCell::kValueOffset));
   Subu(match, value, match);
 }
 
 
 void MacroAssembler::LoadWeakValue(Register value, Handle<WeakCell> cell,
                                    Label* miss) {
   li(value, Operand(cell));
   lw(value, FieldMemOperand(value, WeakCell::kValueOffset));
-  JumpIfNotSmi(value, miss);
+  JumpIfSmi(value, miss);
 }
 
 
 void MacroAssembler::MovFromFloatResult(DoubleRegister dst) {
   if (IsMipsSoftFloatABI) {
     if (kArchEndian == kLittle) {
       Move(dst, v0, v1);
     } else {
       Move(dst, v1, v0);
     }
@@ skipping 2232 matching lines @@
   }
   if (mag.shift > 0) sra(result, result, mag.shift);
   srl(at, dividend, 31);
   Addu(result, result, Operand(at));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS