/// <summary>
/// Convert the given argument if it does not match the target type.
/// </summary>
private static void ConvertIfNeeded(AstExpression arg, XTypeReference targetType)
{
var argType = arg.GetResultType();
if (!targetType.IsSame(argType))
{
if (targetType.IsChar())
{
if (argType.IsUInt16() || argType.IsByte()) Convert(arg, AstCode.Conv_U2, targetType);
}
else if (targetType.IsUInt16())
{
if (argType.IsChar() || argType.IsByte()) Convert(arg, AstCode.Int_to_ushort, targetType);
}
else if (targetType.IsInt16())
{
if (argType.IsChar() || argType.IsByte()) Convert(arg, AstCode.Conv_I2, targetType);
}
}
}
/// <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);
}
}
// Do not convert
return new RLRange(source);
}
private static bool CanPullComparisonUp(AstCode code, XTypeReference arg1, XTypeReference arg2, PullTarget target)
{
if (arg1 == null || arg2 == null)
return false;
bool isReference = arg1.IsDexObject() && arg1.IsDexObject();
if (!isReference && !arg1.IsSame(arg2))
return false;
if (target == PullTarget.Comparison)
return true;
if (arg1.Is(XTypeReferenceKind.Float))
return false;
if (arg1.IsDexWide())
return false;
bool isEq = IsEqualsBranchOrComparison(code);
if (isEq)
return true;
bool isUnsigned = arg1.IsUInt16() || arg1.IsUInt32(); // TODO: check if we really have to exclude unsigned.
if (isReference || isUnsigned)
return false;
return true;
}
/// <summary>
/// Convert the given node to a array creation operation with given element type and argument.
/// </summary>
private static void ConvertToByRefArray(AstExpression node, XTypeReference elementType, AstExpression argument, AstExpression storeArgument, bool isOut, bool argIsGenParam, XModule assembly)
{
var arrayElementType = argIsGenParam ? assembly.TypeSystem.Object : elementType;
if (argIsGenParam && ((!isOut) || (elementType == null) || !elementType.IsSame(argument.GetResultType())))
{
argument = new AstExpression(node.SourceLocation, AstCode.Box, elementType, argument);
}
node.Code = isOut ? AstCode.ByRefOutArray : AstCode.ByRefArray;
node.Operand = arrayElementType;
node.InferredType = new XByReferenceType(arrayElementType);
node.ExpectedType = new XByReferenceType(arrayElementType);
node.Arguments.Clear();
node.Arguments.Add(argument);
node.StoreByRefExpression = storeArgument;
}
public static bool IsSameType(XTypeReference type1, XTypeReference type2)
{
if (type1 == type2)
return true;
if (type1 == null || type2 == null)
return false;
return type1.IsSame(type2);
}
/// <summary>
/// Convert a nullable .GetValueOrDefault()
/// </summary>
private static void ConvertGetValueOrDefault(AstExpression node,XTypeReference type, XModule module)
{
var defExpr = node.Arguments.Count == 1
? new AstExpression(node.SourceLocation, AstCode.DefaultValue, type).SetType(type)
: node.Arguments[1];
defExpr.ExpectedType = type;
if (type.IsPrimitive)
{
// replace with obj != null ? unbox(obj) : defExpr
AstExpression compareExpr, valueExpr;
var loadExpr = node.Arguments[0];
ConvertLoad(loadExpr);
loadExpr.InferredType = module.TypeSystem.Object;
loadExpr.ExpectedType = module.TypeSystem.Object;
if (loadExpr.Code != AstCode.Ldloc)
{
// TODO: how can we get the backend to remove/combine these variables again?
var tmpVar = new AstGeneratedVariable("tmp$", null) { Type = module.TypeSystem.Object };
compareExpr = new AstExpression(node.SourceLocation, AstCode.Stloc, tmpVar, loadExpr).SetType(module.TypeSystem.Object);
valueExpr = new AstExpression(node.SourceLocation, AstCode.Ldloc, tmpVar).SetType(module.TypeSystem.Object);
}
else
{
compareExpr = loadExpr;
valueExpr = loadExpr;
}
valueExpr = new AstExpression(node.SourceLocation, AstCode.Unbox, type, valueExpr).SetType(type);
var newNode = new AstExpression(node.SourceLocation, AstCode.Conditional, type,
compareExpr, valueExpr, defExpr)
.SetType(type);
node.CopyFrom(newNode);
}
else
{
// replace with obj ?? defExpr
var loadExpr = node.Arguments[0];
ConvertLoad(loadExpr);
if(!type.IsSame(loadExpr.InferredType))
{
//loadExpr.ExpectedType = type;
// todo: how to get the cast inserted automatically?
loadExpr = new AstExpression(loadExpr.SourceLocation, AstCode.SimpleCastclass, type, loadExpr);
}
var nullCoalescing = new AstExpression(node.SourceLocation, AstCode.NullCoalescing, null, loadExpr, defExpr);
nullCoalescing.InferredType = type;
node.CopyFrom(nullCoalescing);
}
}
/// <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);
}
