A64: Do not sign-extend constant operand of bitwise operation.

src/a64/lithium-codegen-a64.h

 // 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 100 matching lines @@
 
   // Finish the code by setting stack height, safepoint, and bailout
   // information on it.
   void FinishCode(Handle<Code> code);
 
   // Support for converting LOperands to assembler types.
   // LOperand must be a register.
   Register ToRegister(LOperand* op) const;
   Register ToRegister32(LOperand* op) const;
   Operand ToOperand(LOperand* op);
-  Operand ToOperand32(LOperand* op);
+  Operand ToOperand32I(LOperand* op);
+  Operand ToOperand32U(LOperand* op);
   MemOperand ToMemOperand(LOperand* op) const;
   Handle<Object> ToHandle(LConstantOperand* op) const;
 
   // TODO(jbramley): Examine these helpers and check that they make sense.
   // IsInteger32Constant returns true for smi constants, for example.
   bool IsInteger32Constant(LConstantOperand* op) const;
   bool IsSmi(LConstantOperand* op) const;
 
   int32_t ToInteger32(LConstantOperand* op) const;
   Smi* ToSmi(LConstantOperand* op) const;
@@ skipping 39 matching lines @@
                             LOperand* temp2,
                             IntegerSignedness signedness);
   void DoDeferredTaggedToI(LTaggedToI* instr,
                            LOperand* value,
                            LOperand* temp1,
                            LOperand* temp2);
   void DoDeferredAllocate(LAllocate* instr);
 
   void DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr);
 
+  Operand ToOperand32(LOperand* op, IntegerSignedness signedness);
+
   static Condition TokenToCondition(Token::Value op, bool is_unsigned);
   void EmitGoto(int block);
   int GetNextEmittedBlock() const;
   void DoGap(LGap* instr);
 
   // Generic version of EmitBranch. It contains some code to avoid emitting a
   // branch on the next emitted basic block where we could just fall-through.
   // You shouldn't use that directly but rather consider one of the helper like
   // LCodeGen::EmitBranch, LCodeGen::EmitCompareAndBranch...
   template<class InstrType>
@@ skipping 289 matching lines @@
 
  protected:
   MacroAssembler* masm() const { return codegen_->masm(); }
 
   LCodeGen* codegen_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_LITHIUM_CODEGEN_A64_H_