private ScheduleDependency <XIL3Instr> ToScheduleDependency(XIL3Instr instr, InstructionDependency dep)
{
var predInstr = _func.Instructions[dep.PredIndex];
var odep = dep as OrderDependency;
var tdep = dep as TimeDependency;
if (odep != null)
{
switch (odep.Kind)
{
case OrderDependency.EKind.BeginAfter:
return(new ScheduleDependency <XIL3Instr>(predInstr, Latency[predInstr], int.MaxValue));
case OrderDependency.EKind.CompleteAfter:
return(new ScheduleDependency <XIL3Instr>(predInstr, Latency[predInstr] - Latency[instr], int.MaxValue));
default:
throw new NotImplementedException();
}
}
else if (tdep != null)
{
return(new ScheduleDependency <XIL3Instr>(predInstr, tdep.MinDelay, tdep.MaxDelay));
}
else
{
throw new NotImplementedException();
}
}
public void VisitFieldRef(FieldRef fieldRef)
{
InstructionDependency[] preds;
switch (_litMode)
{
case ELiteralAcceptMode.Read:
preds = _storesInCurBB.Get(fieldRef)
.Select(_ => new OrderDependency(_, OrderDependency.EKind.BeginAfter))
.ToArray();
_readsInCurBB.Add(fieldRef, NextInstructionIndex);
Emit(ISet.LoadVar(fieldRef), _curExpr, preds, 0, fieldRef.Type);
break;
case ELiteralAcceptMode.Write:
{
preds = _storesInCurBB.Get(fieldRef)
.Union(_readsInCurBB.Get(fieldRef))
.Select(_ => new OrderDependency(_, OrderDependency.EKind.BeginAfter))
.ToArray();
if (preds.Any())
{
int idx = NextInstructionIndex;
Emit(DefaultInstructionSet.Instance.Nop(0), _curExpr, preds, 0);
preds = new InstructionDependency[] { new OrderDependency(idx, OrderDependency.EKind.BeginAfter) };
}
_storesInCurBB.Add(fieldRef, NextInstructionIndex);
Emit(ISet.StoreVar(fieldRef), _curExpr, preds, 1);
}
break;
}
}
private void HandleStoreVar(XILSInstr i)
{
int readPoint;
Variable local = i.StaticOperand as Variable;
if (DflowAnalyzer.IsReadAfterWrite(i.Index, out readPoint))
{
var preds = RemapPreds(i.Preds);
// keep expression on the stack, but bury it at the very bottom.
for (int j = 1; j < _resultStack.Count; j++)
{
var resultTypes = TypeStack.Reverse().Skip(1).Concat(TypeStack.Skip(_resultStack.Count - 1)).ToArray();
Emit(DefaultInstructionSet.Instance.Dig(_resultStack.Count - 1).CreateStk(
preds,
TypeStack.Reverse().ToArray(),
resultTypes));
preds = new InstructionDependency[0];
}
_read2write[readPoint] = _resultStack[0];
}
else if (local == null)
{
ProcessDefault(i);
}
else if (DflowAnalyzer.EliminableLocals.Contains(local.LocalIndex))
{
Emit(DefaultInstructionSet.Instance.Pop().CreateStk(1, local.Type));
}
else
{
ProcessDefault(i);
}
}
public void VisitVariable(Variable variable)
{
if (variable.Type.HasIntrinsicTypeOverride &&
variable.Type.IntrinsicTypeOverride == EIntrinsicTypes.Tuple)
{
var itemVars = Unpick(variable);
foreach (var itemVar in itemVars.Reverse())
{
VisitVariable(itemVar);
}
}
else
{
InstructionDependency[] preds;
switch (_litMode)
{
case ELiteralAcceptMode.Read:
preds = _storesInCurBB.Get(variable).Select(
_ => new OrderDependency(_, OrderDependency.EKind.BeginAfter)).ToArray();
_readsInCurBB.Add(variable, NextInstructionIndex);
Emit(ISet.LoadVar(variable), _curExpr, preds, 0, variable.Type);
break;
case ELiteralAcceptMode.Write:
{
preds = _storesInCurBB.Get(variable)
.Union(_readsInCurBB.Get(variable))
.Select(_ => new OrderDependency(_, OrderDependency.EKind.BeginAfter))
.ToArray();
if (preds.Any())
{
int idx = NextInstructionIndex;
Emit(DefaultInstructionSet.Instance.Nop(0), _curExpr, preds, 0);
preds = new InstructionDependency[] { new OrderDependency(idx, OrderDependency.EKind.BeginAfter) };
}
_storesInCurBB.Add(variable, NextInstructionIndex);
Debug.Assert(variable.Type.Equals(_typeStack.Peek()));
Emit(ISet.StoreVar(variable), _curExpr, preds, 1);
}
break;
}
}
}
