private static bool TryDecodePseudoFieldData(
ClrFieldDefinition pseudoField,
IType elementType,
out IReadOnlyList <Constant> data)
{
var init = pseudoField.Definition.InitialValue;
var intSpec = elementType.GetIntegerSpecOrNull();
if (intSpec != null && intSpec.Size % 8 == 0)
{
int bytesPerInt = intSpec.Size / 8;
int intCount = init.Length / bytesPerInt;
var results = new Constant[intCount];
for (int i = 0; i < intCount; i++)
{
var value = new IntegerConstant(0, intSpec);
for (int j = bytesPerInt - 1; j >= 0; j--)
{
value = value.ShiftLeft(8).Add(new IntegerConstant(init[i * bytesPerInt + j], intSpec));
}
results[i] = value.Normalized;
}
data = results;
return(true);
}
else
{
data = null;
return(false);
}
}
private static bool IsArrayInit(NamedInstructionBuilder instruction, out ValueTag array, out ClrFieldDefinition pseudoField)
{
if (instruction.Prototype is CallPrototype)
{
var call = (CallPrototype)instruction.Prototype;
var callee = call.Callee;
if (callee.IsStatic && callee.Parameters.Count == 2 &&
callee.FullName.ToString() == "System.Runtime.CompilerServices.RuntimeHelpers.InitializeArray")
{
var pseudoFieldRef = instruction.Arguments[1];
NamedInstructionBuilder pseudoFieldInsn;
if (instruction.Graph.TryGetInstruction(pseudoFieldRef, out pseudoFieldInsn) &&
pseudoFieldInsn.Prototype is ConstantPrototype)
{
var constVal = ((ConstantPrototype)pseudoFieldInsn.Prototype).Value;
if (constVal is FieldTokenConstant)
{
pseudoField = ((FieldTokenConstant)constVal).Field as ClrFieldDefinition;
array = instruction.Arguments[0];
return(pseudoField != null);
}
}
}
}
array = null;
pseudoField = null;
return(false);
}
