// Returns -1 if there isn't one instruction that sets the stack entry.
public int GetStackIndex(int index, int nth)
{
DBC.FastPre(index >= 0 && index < m_states.Length, "index out of range");
DBC.FastPre(nth >= 0, "nth out of range");
List <StackEntry> stack = m_states[index].Stack;
if (stack == null)
{
if (!m_skipped)
{
Log.WarningLine(this, "stack was null at {0:X2}", m_instructions[index].Untyped.Offset);
Log.DebugLine(this, "{0:F}", m_instructions);
}
return(-1);
}
if (nth < stack.Count)
{
return(stack[stack.Count - nth - 1].Index);
}
else
{
return(-1);
}
}