/// <summary> /// Create code to unbox the given source value into the given type. /// </summary> public static RLRange Unbox(this IRLBuilder builder, ISourceLocation sequencePoint, RegisterSpec source, XTypeReference type, AssemblyCompiler compiler, DexTargetPackage targetPackage, IRegisterAllocator frame) { if (type.IsPrimitive) { RCode convertAfterCode; var rUnboxed = frame.AllocateTemp(type.GetReference(targetPackage)); var unboxValueMethod = type.GetUnboxValueMethod(compiler, targetPackage, out convertAfterCode); var first = builder.Add(sequencePoint, RCode.Invoke_static, unboxValueMethod, source); var last = builder.Add(sequencePoint, type.MoveResult(), rUnboxed); if (convertAfterCode != RCode.Nop) { last = builder.Add(sequencePoint, convertAfterCode, rUnboxed, rUnboxed); } return new RLRange(first, last, rUnboxed); } XTypeDefinition enumTypeDef; if (type.IsEnum(out enumTypeDef)) { var rUnboxed = frame.AllocateTemp(type.GetReference(targetPackage)); var unboxValueMethod = enumTypeDef.Methods.First(x => x.Name == NameConstants.Enum.UnboxMethodName).GetReference(targetPackage); var first = builder.Add(sequencePoint, RCode.Invoke_static, unboxValueMethod, source); var last = builder.Add(sequencePoint, type.MoveResult(), rUnboxed); return new RLRange(first, last, rUnboxed); } if (!type.IsGenericParameter) { // Just cast var checkCast = builder.Add(sequencePoint, RCode.Check_cast, type.GetReference(targetPackage), source); return new RLRange(checkCast, source); } // Do nothing var nop = builder.Add(sequencePoint, RCode.Nop); return new RLRange(nop, source); }
/// <summary> /// Create code to load a value from an annotation interface. /// </summary> /// <returns>The register(s) holding the value</returns> private static Register[] CreateLoadValueSequence( ISourceLocation seqp, MethodBody body, XTypeReference valueType, Register annotationReg, MethodDefinition getter, AssemblyCompiler compiler, DexTargetPackage targetPackage, out Instruction branchIfNotSet) { // NOTE: It would be better if we wouldn't get the values as object arrays // but as arrays of the actual type. // Apparently though the DexWriter will not write our attributes // if they contain arrays not of type object[]. Therefore the // conversion code below. // All in all it would be much cleaner if we could emit Ast code here // instead of RL code. List<Register> result = new List<Register>(); // get the array. Register regObject = body.AllocateRegister(RCategory.Temp, RType.Object); Register regIntVal = body.AllocateRegister(RCategory.Temp, RType.Value); body.Instructions.Add(seqp, RCode.Invoke_interface, getter, annotationReg); body.Instructions.Add(seqp, RCode.Move_result_object, regObject); // allocate result, initialize to default value. if (valueType.IsWide()) { Tuple<Register, Register> regs = body.AllocateWideRegister(RCategory.Temp); body.Instructions.Add(seqp, RCode.Const_wide, 0, regs.Item1); result.Add(regs.Item1); result.Add(regs.Item2); } else if (valueType.IsPrimitive) { Register reg = body.AllocateRegister(RCategory.Temp, RType.Value); body.Instructions.Add(seqp, RCode.Const, 0, reg); result.Add(reg); } else // object { Register reg = body.AllocateRegister(RCategory.Temp, RType.Object); body.Instructions.Add(seqp, RCode.Const, 0, reg); result.Add(reg); } // check if value is unset (array length 0) or null (array length 2) body.Instructions.Add(seqp, RCode.Array_length, regIntVal, regObject); branchIfNotSet = body.Instructions.Add(seqp, RCode.If_eqz, regIntVal); body.Instructions.Add(seqp, RCode.Rsub_int, 1, regIntVal, regIntVal); var branchOnNull = body.Instructions.Add(seqp, RCode.If_nez, regIntVal); // get the (boxed) value body.Instructions.Add(seqp, RCode.Const, 0, regIntVal); // convert to target type. if (valueType.IsArray) { Register regTmp = body.AllocateRegister(RCategory.Temp, RType.Object); Register regType = body.AllocateRegister(RCategory.Temp, RType.Object); var helper = compiler.GetDot42InternalType(InternalConstants.CompilerHelperName); var convertArray = helper.Resolve().Methods.First(p => p.Name == "ConvertArray" && p.Parameters.Count == 2) .GetReference(targetPackage); var underlying = valueType.ElementType.GetReference(targetPackage); body.Instructions.Add(seqp, RCode.Aget_object, regTmp, regObject, regIntVal); body.Instructions.Add(seqp, RCode.Const_class, underlying, regType); body.Instructions.Add(seqp, RCode.Invoke_static, convertArray, regTmp, regType); body.Instructions.Add(seqp, RCode.Move_result_object, result[0]); body.Instructions.Add(seqp, RCode.Check_cast, valueType.GetReference(targetPackage), result[0]); } else if (valueType.IsEnum()) { Register regTmp = body.AllocateRegister(RCategory.Temp, RType.Object); Register regType = body.AllocateRegister(RCategory.Temp, RType.Object); var getFromObject = compiler.GetDot42InternalType("Enum").Resolve() .Methods.Single(p=>p.Name == "GetFromObject") .GetReference(targetPackage); body.Instructions.Add(seqp, RCode.Aget_object, regTmp, regObject, regIntVal); body.Instructions.Add(seqp, RCode.Const_class, valueType.GetReference(targetPackage), regType); body.Instructions.Add(seqp, RCode.Invoke_static, getFromObject, regType, regTmp); body.Instructions.Add(seqp, valueType.MoveResult(), result[0]); body.Instructions.Add(seqp, RCode.Check_cast, valueType.GetReference(targetPackage), result[0]); } else if(!valueType.IsPrimitive) { body.Instructions.Add(seqp, RCode.Aget_object, result[0], regObject, regIntVal); body.Instructions.Add(seqp, RCode.Check_cast, valueType.GetReference(targetPackage), result[0]); } else { Register regTmp = body.AllocateRegister(RCategory.Temp, RType.Object); // unbox and store RCode afterConvert; var unbox = valueType.GetUnboxValueMethod(compiler, targetPackage, out afterConvert); body.Instructions.Add(seqp, RCode.Aget_object, regTmp, regObject, regIntVal); body.Instructions.Add(seqp, RCode.Invoke_static, unbox, regTmp); body.Instructions.Add(seqp, valueType.MoveResult(), result[0]); if (afterConvert != RCode.Nop) { body.Instructions.Add(seqp, afterConvert, result[0], result[0]); } } // nop will be removed at some stage later. var nop = body.Instructions.Add(seqp, RCode.Nop); branchOnNull.Operand = nop; return result.ToArray(); }