public override Access AllocLocal(bool escape)
{
if (escape)
{
Access ret = new InFrame(this, Offset);
Offset -= WSize;
return(ret);
}
else
{
return(new InReg());
}
}
private void RewriteProgram(HashSet <Node> spilledNodes)
{
HashSet <Node> newTemps = new HashSet <Node>();
foreach (Node v in spilledNodes)
{
InFrame a = (InFrame)Frame.AllocLocal(true);
foreach (BasicBlock b in Blocks)
{
for (int i = 0; i < b.List.Count; i++)
{
TExp inst = b.List[i];
if (inst.LivenessNode == null)
{
continue;
}
if (inst.LivenessNode.Use.Contains(v.Temp))
{
Temp.Temp p = new Temp.Temp();
newTemps.Add(GetNodeByTemp(p));
GetNodeByTemp(p).IsNew = true;
b.List.Insert(i, new Load(Frame.FP(), a.Offset, p));
b.List[++i].ReplaceUse(v.Temp, p);
}
if (inst.LivenessNode.Def.Contains(v.Temp))
{
Temp.Temp p = new Temp.Temp();
newTemps.Add(GetNodeByTemp(p));
GetNodeByTemp(p).IsNew = true;
b.List.Insert(i + 1, new Store(Frame.FP(), a.Offset, p));
b.List[i++].ReplaceDef(v.Temp, p);
}
}
}
}
spilledNodes.Clear();
Initial = newTemps;
Initial.UnionWith(ColoredNodes);
Initial.UnionWith(CoalescedNodes);
ColoredNodes.Clear();
CoalescedNodes.Clear();
}
