public void disp(Operand oprnd)
{
Console.WriteLine(" " + oprnd.opr + " " + oprnd.state);
}
public List<Node> Chk_stat(List<Node> Mov_N_List)
{
HashSet<Operand> All_opr = new HashSet<Operand>();
List<Node> UL_Mov = new List<Node>();
String[] REGS = new String[] { "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp", "si", "di", "bp", "sp" };
String[] f_regs;
//Node temp = new Node();
foreach (Node temp in Mov_N_List)
{
string first = temp.operands[0];
string sec = temp.operands[1];
if (REGS.Contains(first))
{
Operand op = new Operand(first, "undef");
//first check for reference
if (REGS.Contains(sec))
{
if (op.state.Equals("dd"))
{
op.state = "def-ref";
UL_Mov.Add(temp);//here we added the undef-ref reg's inst in useless Mov list
Useless++;
}
if (op.state.Equals("undef"))
{
op.state = "undef-ref";
UL_Mov.Add(temp);//here we added the undef-ref reg's inst in useless Mov list
Useless++;
}
}
if (!REGS.Contains(sec))//first check is sec operand is another than regs it another than REGS the they are definde ie assignde some Mem address
{
if (op.state == "def")
{
op.state = "ref";
}
else
{
op.state = "def";
}
}
if (All_opr.Contains(op))
{
//op.state = "dd";
if (op.state == "dd")
{
op.state = "dd";//ref
}
else
{
op.state = "dd";
}
UL_Mov.Add(temp);//here we added the def-def reg's inst in useless Mov list
Useless++;
}
All_opr.Add(op);
}
}
//Console.WriteLine("from temp");
//foreach (Operand x in All_opr)
//{
// x.disp(x);
//}
return UL_Mov;
}