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

src/a64/lithium-codegen-a64.h

Index: src/a64/lithium-codegen-a64.h
diff --git a/src/a64/lithium-codegen-a64.h b/src/a64/lithium-codegen-a64.h
index 63fec4700c76796a7b571caeded0e4d316469cab..4be640f6f35a53a12c96b1bc62482312adf3b02b 100644
--- a/src/a64/lithium-codegen-a64.h
+++ b/src/a64/lithium-codegen-a64.h
@@ -118,7 +118,8 @@ class LCodeGen BASE_EMBEDDED {
   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;
 
@@ -178,6 +179,8 @@ class LCodeGen BASE_EMBEDDED {
 
   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;