Fix bugs in simplified lowering relating to int32/uint32 signs.

src/compiler/machine-operator.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_MACHINE_OPERATOR_H_
 #define V8_COMPILER_MACHINE_OPERATOR_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/machine-type.h"
 
@@ skipping 55 matching lines @@
     kFloat64Ceil = 1u << 1,
     kFloat64RoundTruncate = 1u << 2,
     kFloat64RoundTiesAway = 1u << 3,
     kInt32DivIsSafe = 1u << 4,
     kInt32ModIsSafe = 1u << 5,
     kUint32DivIsSafe = 1u << 6,
     kUint32ModIsSafe = 1u << 7
   };
   typedef base::Flags<Flag, unsigned> Flags;
 
-  explicit MachineOperatorBuilder(MachineType word = kMachPtr,
+  explicit MachineOperatorBuilder(Zone* zone, MachineType word = kMachPtr,
                                   Flags supportedOperators = kNoFlags);
 
   const Operator* Word32And();
   const Operator* Word32Or();
   const Operator* Word32Xor();
   const Operator* Word32Shl();
   const Operator* Word32Shr();
   const Operator* Word32Sar();
   const Operator* Word32Ror();
   const Operator* Word32Equal();
@@ skipping 117 matching lines @@
   V(Uint, Mod)
 #define PSEUDO_OP(Prefix, Suffix)                                \
   const Operator* Prefix##Suffix() {                             \
     return Is32() ? Prefix##32##Suffix() : Prefix##64##Suffix(); \
   }
   PSEUDO_OP_LIST(PSEUDO_OP)
 #undef PSEUDO_OP
 #undef PSEUDO_OP_LIST
 
  private:
+  Zone* zone_;
   const MachineOperatorGlobalCache& cache_;
   const MachineType word_;
   const Flags flags_;
   DISALLOW_COPY_AND_ASSIGN(MachineOperatorBuilder);
 };
 
 
 DEFINE_OPERATORS_FOR_FLAGS(MachineOperatorBuilder::Flags)
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_OPERATOR_H_