/// <summary> /// Return the type which has the most information. /// </summary> private static XTypeReference TypeWithMoreInformation(XTypeReference leftPreferred, XTypeReference rightPreferred) { var left = GetInformationAmount(leftPreferred); var right = GetInformationAmount(rightPreferred); if (left < right) return rightPreferred; if (left > right) return leftPreferred; if (leftPreferred.IsSystemObject()) { // Cases where ldnull is followed by something more specific return rightPreferred; } // TODO return leftPreferred; }
/// <summary> /// Create code to initialize a value from an attribute. /// </summary> /// <returns>The register(s) holding the value</returns> private static Register[] CreateInitializeValueInstructions(ISourceLocation seqp, MethodBody body, XTypeReference targetType, CustomAttributeArgument value, AssemblyCompiler compiler, DexTargetPackage targetPackage) { List<Register> result = new List<Register>(); // allocate result, initialize to default value. if (targetType.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 (targetType.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); } // load data if (value.Value == null) // must be a reference type { body.Instructions.Add(seqp, RCode.Const, 0, result[0]); body.Instructions.Add(seqp, RCode.Check_cast, targetType.GetReference(targetPackage), result[0]); return result.ToArray(); } var valueType = XBuilder.AsTypeReference(compiler.Module, value.Type); if (value.Value is CustomAttributeArgument) { // this happens if a type conversion is neccessary var nestedValue = (CustomAttributeArgument)value.Value; valueType = XBuilder.AsTypeReference(compiler.Module, nestedValue.Type); var rOrigValue = CreateInitializeValueInstructions(seqp, body, valueType, nestedValue, compiler, targetPackage); if (!nestedValue.Type.IsPrimitive) { body.Instructions.Add(seqp, RCode.Move_object, result[0], rOrigValue[0]); body.Instructions.Add(seqp, RCode.Check_cast, targetType.GetReference(targetPackage), result[0]); } else if(!targetType.IsPrimitive) { body.Instructions.Add(seqp, RCode.Invoke_static, valueType.GetBoxValueOfMethod(), rOrigValue); body.Instructions.Add(seqp, RCode.Move_result_object, result[0]); body.Instructions.Add(seqp, RCode.Check_cast, targetType.GetReference(targetPackage), result[0]); } else { throw new Exception(string.Format("type converstion in attribute {0}=>{1} not yet supported", valueType.FullName, targetType.FullName)); } } else if (valueType.IsArray) { var array = (CustomAttributeArgument[])value.Value; var elementType = valueType.ElementType; Register rIndex = body.AllocateRegister(RCategory.Temp, RType.Value); body.Instructions.Add(seqp, RCode.Const, array.Length, rIndex); body.Instructions.Add(seqp, RCode.New_array, valueType.GetReference(targetPackage), result[0], rIndex); // iterate through each value for (int i = 0; i < array.Length; i++) { Register rLoaded = CreateInitializeValueInstructions(seqp, body, elementType, array[i], compiler, targetPackage)[0]; body.Instructions.Add(seqp, RCode.Const, i, rIndex); body.Instructions.Add(seqp, valueType.APut(), rLoaded, result[0], rIndex); } } else if (targetType.IsEnum()) { var enumClass = (targetType.IsEnum()? targetType:valueType).GetReference(targetPackage) ; Register rEnumClass = body.AllocateRegister(RCategory.Temp, RType.Object); body.Instructions.Add(seqp, RCode.Const_class, enumClass, rEnumClass); long lVal = Convert.ToInt64(value.Value); if (lVal <= int.MaxValue && lVal >= int.MinValue) { Register regTmp = body.AllocateRegister(RCategory.Temp, RType.Value); body.Instructions.Add(seqp, RCode.Const, (int)lVal, regTmp); var get = compiler.GetDot42InternalType("Enum").Resolve() .Methods.Single(p => p.Name == "Get" && p.Parameters.Count == 2 && !p.Parameters[1].ParameterType.IsWide()) .GetReference(targetPackage); body.Instructions.Add(seqp, RCode.Invoke_static, get, rEnumClass, regTmp); body.Instructions.Add(seqp, targetType.MoveResult(), result[0]); } else { var regTmp = body.AllocateWideRegister(RCategory.Temp); body.Instructions.Add(seqp, RCode.Const, (long)lVal, regTmp.Item1); var get = compiler.GetDot42InternalType("Enum").Resolve() .Methods.Single(p => p.Name == "Get" && p.Parameters.Count == 2 && p.Parameters[1].ParameterType.IsWide()) .GetReference(targetPackage); body.Instructions.Add(seqp, RCode.Invoke_static, get, rEnumClass, regTmp.Item1); body.Instructions.Add(seqp, targetType.MoveResult(), result[0]); } body.Instructions.Add(seqp, RCode.Check_cast, targetType.GetReference(targetPackage), result[0]); } else if (valueType.IsSystemString()) { body.Instructions.Add(seqp, RCode.Const_string, (string)value.Value, result[0]); } else if (valueType.IsSystemType()) { var type = XBuilder.AsTypeReference(compiler.Module, (TypeReference)value.Value); // TODO: this might not work with typeof(void) on ART runtime. body.Instructions.Add(seqp, RCode.Const_class, type.GetReference(targetPackage), result[0]); } else if (!valueType.IsPrimitive) { // can this happen? throw new Exception("invalid value type in attribute: " + targetType.FullName); } else { if (targetType.IsSystemObject()) { // can this happen? or is this always handled above? // boxing required. var rUnboxed = CreateInitializeValueInstructions(seqp, body, valueType, value, compiler, targetPackage); body.Instructions.Add(seqp, RCode.Invoke_static, valueType.GetBoxValueOfMethod(), rUnboxed); body.Instructions.Add(seqp, RCode.Move_result_object, result[0]); } else if(targetType.IsDouble()) { body.Instructions.Add(seqp, RCode.Const_wide, Convert.ToDouble(value.Value), result[0]); } else if (targetType.IsWide() && valueType.IsUInt64()) { body.Instructions.Add(seqp, RCode.Const_wide, (long)Convert.ToUInt64(value.Value), result[0]); } else if (targetType.IsWide()) { body.Instructions.Add(seqp, RCode.Const_wide, Convert.ToInt64(value.Value), result[0]); } else if (targetType.IsFloat()) { body.Instructions.Add(seqp, RCode.Const, Convert.ToSingle(value.Value), result[0]); } else { body.Instructions.Add(seqp, RCode.Const, (int)Convert.ToInt64(value.Value), result[0]); } } return result.ToArray(); }
/// <summary> /// Emit code (if needed) to convert a value from source type to destination type. /// This method is used in "store" opcodes such stloc, stfld, stsfld, call /// </summary> internal static RLRange ConvertTypeBeforeStore(this IRLBuilder builder, ISourceLocation sequencePoint, XTypeReference sourceType, XTypeReference destinationType, RegisterSpec source, DexTargetPackage targetPackage, IRegisterAllocator frame, AssemblyCompiler compiler, out bool converted) { converted = false; if (sourceType.IsSame(destinationType)) { // Unsigned conversions if (sourceType.IsByte()) { var tmp = builder.EnsureTemp(sequencePoint, source, frame); var ins = builder.Add(sequencePoint, RCode.Int_to_byte, tmp.Result, tmp.Result); converted = true; return new RLRange(tmp, ins, tmp.Result); } else if (sourceType.IsUInt16()) { var tmp = builder.EnsureTemp(sequencePoint, source, frame); var ins = builder.Add(sequencePoint, RCode.Int_to_short, tmp.Result, tmp.Result); converted = true; return new RLRange(tmp, ins, tmp.Result); } return new RLRange(source); } if (sourceType.IsArray) { var compilerHelper = compiler.GetDot42InternalType(InternalConstants.CompilerHelperName).Resolve(); var arrayType = targetPackage.DexFile.GetClass(targetPackage.NameConverter.GetConvertedFullName(compilerHelper)); var sourceArrayElementType = ((XArrayType)sourceType).ElementType; if (destinationType.ExtendsIList()) { // Use ArrayHelper.AsList to convert var convertMethodName = "AsList"; var convertMethod = arrayType.GetMethod(convertMethodName); // Add code var tmp = builder.EnsureTemp(sequencePoint, source, frame); builder.Add(sequencePoint, RCode.Invoke_static, convertMethod, tmp.Result.Register); var last = builder.Add(sequencePoint, RCode.Move_result_object, tmp.Result.Register); converted = true; return new RLRange(tmp, last, tmp.Result); } if (destinationType.ExtendsICollection()) { // Use ArrayHelper.AsCollection to convert var convertMethodName = "AsCollection"; var convertMethod = arrayType.GetMethod(convertMethodName); // Add code var tmp = builder.EnsureTemp(sequencePoint, source, frame); builder.Add(sequencePoint, RCode.Invoke_static, convertMethod, tmp.Result.Register); var last = builder.Add(sequencePoint, RCode.Move_result_object, tmp.Result.Register); converted = true; return new RLRange(tmp, last, tmp.Result); } if (destinationType.ExtendsIEnumerable()) { // Use ArrayHelper.As...Enumerable to convert var convertMethodName = "AsObjectEnumerable"; if (sourceArrayElementType.IsPrimitive) { if (sourceArrayElementType.IsBoolean()) convertMethodName = "AsBoolEnumerable"; else if (sourceArrayElementType.IsByte()) convertMethodName = "AsByteEnumerable"; else if (sourceArrayElementType.IsSByte()) convertMethodName = "AsSByteEnumerable"; else if (sourceArrayElementType.IsChar()) convertMethodName = "AsCharEnumerable"; else if (sourceArrayElementType.IsInt16()) convertMethodName = "AsInt16Enumerable"; else if (sourceArrayElementType.IsUInt16()) convertMethodName = "AsUInt16Enumerable"; else if (sourceArrayElementType.IsInt32()) convertMethodName = "AsInt32Enumerable"; else if (sourceArrayElementType.IsUInt32()) convertMethodName = "AsUInt32Enumerable"; else if (sourceArrayElementType.IsInt64()) convertMethodName = "AsInt64Enumerable"; else if (sourceArrayElementType.IsFloat()) convertMethodName = "AsFloatEnumerable"; else if (sourceArrayElementType.IsDouble()) convertMethodName = "AsDoubleEnumerable"; else throw new ArgumentOutOfRangeException("Unknown primitive array element type " + sourceArrayElementType); } var convertMethod = arrayType.GetMethod(convertMethodName); // Add code var tmp = builder.EnsureTemp(sequencePoint, source, frame); builder.Add(sequencePoint, RCode.Invoke_static, convertMethod, tmp.Result.Register); var last = builder.Add(sequencePoint, RCode.Move_result_object, tmp.Result.Register); converted = true; return new RLRange(tmp, last, tmp.Result); } } if (sourceType.IsGenericParameter && !destinationType.IsSystemObject()) { var gp = (XGenericParameter) sourceType; if (gp.Constraints.Length > 0) { // we could find the best matching constraint here, and check if we actually // need to cast. This would probably allow us to skip some unneccesary casts. // We would need some sort of IsAssignableFrom though, and I'm not sure we have // this logic with XTypeDefinition implemented yet. // Therefore, we just assume that the original compiler has done its job well, // and always cast to the destination type. // Apparently dex seems not to need a cast when destinationType is an interface. // Since i'm not to sure about this, we nevertheless insert the cast here. // [TODO: check if this is needed] var tmp = builder.EnsureTemp(sequencePoint, source, frame); var cast = builder.Add(sequencePoint, RCode.Check_cast, destinationType.GetReference(targetPackage), tmp.Result); converted = true; return new RLRange(tmp, cast, tmp.Result); } } // Do not convert return new RLRange(source); }