private void IncludeWriteOfVariable(MethodBody body, BitArray includedInstructions, VariableUsage readUsage)
{
int readIndex = body.Instructions.IndexOf(readUsage.Instruction);
List <Instruction> precedingInstructions = body.Instructions.Take(readIndex).ToList();
VariableUsage writeUsage = _instructionHelper
.GetUsages(precedingInstructions)
.LastOrDefault(usage => usage.Operation == VariableOperation.Write && usage.Index == readUsage.Index);
if (writeUsage == null)
{
throw new InvalidOperationException("Could not find write of variable " + readUsage.Index);
}
int writeIndex = body.Instructions.IndexOf(writeUsage.Instruction);
includedInstructions[writeIndex] = true;
IncludeInstructionsUntilStackEmpty(body, writeUsage.Instruction, includedInstructions, 1);
}
private void IncludeVariableInitializationInstructions(
MethodBody body,
BitArray includedInstructions)
{
while (true)
{
List <Instruction> instructions = body.Instructions
.Where((t, i) => includedInstructions[i])
.ToList();
VariableUsage firstReadUsage = _instructionHelper
.GetUsages(instructions)
.GroupBy(usage => usage.Index)
.Select(group => group.First())
.FirstOrDefault(usage => usage.Operation == VariableOperation.Read);
if (firstReadUsage == null)
{
return;
}
IncludeWriteOfVariable(body, includedInstructions, firstReadUsage);
}
}
private void IncludeWriteOfVariable(MethodBody body, BitArray includedInstructions, VariableUsage readUsage)
{
int readIndex = body.Instructions.IndexOf(readUsage.Instruction);
List<Instruction> precedingInstructions = body.Instructions.Take(readIndex).ToList();
VariableUsage writeUsage = _instructionHelper
.GetUsages(precedingInstructions)
.LastOrDefault(usage => usage.Operation == VariableOperation.Write && usage.Index == readUsage.Index);
if (writeUsage == null)
{
throw new InvalidOperationException("Could not find write of variable " + readUsage.Index);
}
int writeIndex = body.Instructions.IndexOf(writeUsage.Instruction);
includedInstructions[writeIndex] = true;
IncludeInstructionsUntilStackEmpty(body, writeUsage.Instruction, includedInstructions);
}