Ejemplo n.º 1
0
//-----------------------------------------------------------------------------
bool AsmOptimization::Optimize(AsmCode& code)
{
    bool res = false;
    for (int i = 0; i < code.Size(); ++i)
    {
        res = Optimize(code, i) || res;
    }

    return res;
}
Ejemplo n.º 2
0
bool PopToUpPushToDown::Action(AsmCode& code, AsmCmd1* cmd, int i, int inc)
{
    int j = i;
    while (0 < j && j + 1 < code.Size()
        && !UsesStack(code[j + inc])
        && !IsArgument(cmd->GetArgument(), code[j + inc]))
    {
        j += inc;
    }
    code.Move(i, j);
    return j != i;
}
Ejemplo n.º 3
0
//-----------------------------------------------------------------------------
bool AddSubZero::Optimize(AsmCode& code, int index)
{
    if (index == code.Size())
    {
        return false;
    }

    AsmCmd2* cmd = dynamic_cast<AsmCmd2*>(code[index]);
    if (cmd && (*cmd == cmdSUB || *cmd == cmdADD) && *cmd->GetSecond() == "0")
    {
        code.Delete(index);
        return true;
    }

    return false;
}
Ejemplo n.º 4
0
bool PopToUpPushToDown::Optimize(AsmCode& code)
{
    bool res = false;
    for (int i = 0; i < code.Size(); ++i)
    {
        AsmCmd1* cmd = dynamic_cast<AsmCmd1*>(code[i]);
        if (cmd && *cmd == cmdPUSH)
        {
            res = Action(code, cmd, i, 1) || res;
        }
        else if (cmd && *cmd == cmdPOP)
        {
            res = Action(code, cmd, i, -1) || res;
        }
    }
    return res;
}
Ejemplo n.º 5
0
bool PushPopOptimization::Optimize(AsmCode& code, int index)
{
    if (index + 1 == code.Size())
    {
        return false;
    }

    AsmCmd1* cmd1 = dynamic_cast<AsmCmd1*>(code[index]);
    AsmCmd1* cmd2 = dynamic_cast<AsmCmd1*>(code[index + 1]);

    if (cmd1 && cmd2 && *cmd1 == cmdPUSH  && *cmd2 == cmdPOP)
    {
        if (*cmd1->GetArgument() == cmd2->GetArgument())
        {
            code.Delete(index, index + 1);
            return true;
        }
    }

    return false;
}
Ejemplo n.º 6
0
bool PushPopToMovOptimization::Optimize(AsmCode& code, int index)
{
    if (index + 1 == code.Size())
    {
        return false;
    }

    AsmCmd1* cmd1 = dynamic_cast<AsmCmd1*>(code[index]);
    AsmCmd1* cmd2 = dynamic_cast<AsmCmd1*>(code[index + 1]);

    if (cmd1 && cmd2
        && *cmd1 == cmdPUSH  && *cmd2 == cmdPOP
        && *cmd1->GetArgument() != cmd2->GetArgument()
        && !IsMemory(cmd1->GetArgument()) && !IsMemory(cmd2->GetArgument()))
    {
            AsmCmd2* optCmd = new AsmCmd2(cmdMOV, cmd2->GetArgument(), cmd1->GetArgument());
            code.Delete(index, index + 1);
            code.Insert(optCmd, index);
            return true;
    }

    return false;
}
Ejemplo n.º 7
0
bool MovChainOptimization::Optimize(AsmCode& code, int index)
{
    if (index + 1 == code.Size())
    {
        return false;
    }

    AsmCmd2* cmd1 = dynamic_cast<AsmCmd2*>(code[index]);
    AsmCmd2* cmd2 = dynamic_cast<AsmCmd2*>(code[index + 1]);

    if (cmd1 && cmd2
        && *cmd1 == cmdMOV && *cmd2 == cmdMOV
        && *cmd1->GetFirst() != EBP && *cmd1->GetSecond() != ESP
        && *cmd2->GetSecond() == cmd1->GetFirst()
        && !IsMemory(cmd1->GetSecond()) && !IsMemory(cmd2->GetFirst()))
    {
        AsmCmd2* optCmd = new AsmCmd2(cmdMOV, cmd2->GetFirst(), cmd1->GetSecond());
        code.Delete(index, index + 1);
        code.Insert(optCmd, index);
        return true;
    }

    return false;
}