public Field(FieldDefinition fieldDefinition, Type declaringType, Type type, int structIndex)
{
FieldDefinition = fieldDefinition;
DeclaringType = declaringType;
Type = type;
StructIndex = structIndex;
}
public Field(FieldDefinition fieldDefinition, Class declaringClass, Type type, int structIndex)
{
FieldDefinition = fieldDefinition;
DeclaringClass = declaringClass;
Type = type;
StructIndex = structIndex;
}
public Function(Type declaringType, MethodReference methodReference, TypeRef functionType, ValueRef generatedValue, FunctionSignature signature)
{
Signature = signature;
DeclaringType = declaringType;
MethodReference = methodReference;
FunctionType = functionType;
GeneratedValue = generatedValue;
VirtualSlot = -1;
MethodDefinition = methodReference.Resolve();
ParameterTypes = signature.ParameterTypes.Select(x => x.Type).ToArray();
// Generate function type when being called from vtable/IMT (if it applies)
// If declaring type is a value type, needs to unbox "this" for virtual method
if (DeclaringType.TypeDefinitionCecil.IsValueType
&& (MethodDefinition.Attributes & MethodAttributes.Virtual) != 0)
{
bool hasStructValueReturn = signature.ReturnType.ABIParameterInfo.Kind == ABIParameterInfoKind.Indirect;
// Create function type with boxed "this"
var argumentCount = LLVM.CountParamTypes(FunctionType);
var argumentTypes = new TypeRef[argumentCount];
LLVM.GetParamTypes(FunctionType, argumentTypes);
// Change first type to boxed "this"
var thisIndex = hasStructValueReturn ? 1 : 0;
argumentTypes[thisIndex] = LLVM.PointerType(DeclaringType.ObjectTypeLLVM, 0);
VirtualFunctionType = LLVM.FunctionType(LLVM.GetReturnType(FunctionType), argumentTypes, LLVM.IsFunctionVarArg(FunctionType));
}
else
{
VirtualFunctionType = FunctionType;
}
}
public Function(Type declaringType, MethodReference methodReference, TypeRef functionType, ValueRef generatedValue, Type returnType, Type[] parameterTypes)
{
Signature = new FunctionSignature(returnType, parameterTypes);
DeclaringType = declaringType;
MethodReference = methodReference;
FunctionType = functionType;
GeneratedValue = generatedValue;
VirtualSlot = -1;
}
public FunctionSignature(IABI abi, Type returnType, Type[] parameterTypes, MethodCallingConvention callingConvention, PInvokeInfo pinvoke)
{
ReturnType = new FunctionParameterType(abi, returnType);
ParameterTypes = new FunctionParameterType[parameterTypes.Length];
for (int index = 0; index < parameterTypes.Length; index++)
ParameterTypes[index] = new FunctionParameterType(abi, parameterTypes[index]);
CallingConvention = callingConvention;
PInvokeInfo = pinvoke;
}
public ABIParameterInfo GetParameterInfo(Type type)
{
if (type.StackType == StackValueType.Value)
{
// Types smaller than register size will be coerced to integer register type
var structSize = LLVM.ABISizeOfType(targetData, type.DefaultTypeLLVM);
if (structSize <= (ulong)intPtrSize)
{
return new ABIParameterInfo(ABIParameterInfoKind.Coerced, LLVM.IntTypeInContext(context, (uint)structSize * 8));
}
// Otherwise, fallback to passing by pointer + byval (x86) or direct (x64)
if (intPtrSize == 8)
return new ABIParameterInfo(ABIParameterInfoKind.Direct);
return new ABIParameterInfo(ABIParameterInfoKind.Indirect);
}
// Other types are passed by value (pointers, int32, int64, float, etc...)
return new ABIParameterInfo(ABIParameterInfoKind.Direct);
}