private Operand Map(Operand operand, Dictionary <Operand, Operand> map, InstructionNode callNode)
{
if (operand == null)
{
return(null);
}
Operand mappedOperand;
if (map.TryGetValue(operand, out mappedOperand))
{
return(mappedOperand);
}
if (operand.IsSymbol)
{
if (operand.StringData != null)
{
mappedOperand = Operand.CreateStringSymbol(operand.Type.TypeSystem, operand.Name, operand.StringData);
}
else if (operand.Method != null)
{
mappedOperand = Operand.CreateSymbolFromMethod(operand.Type.TypeSystem, operand.Method);
}
else if (operand.Name != null)
{
mappedOperand = Operand.CreateManagedSymbol(operand.Type, operand.Name);
}
}
else if (operand.IsParameter)
{
mappedOperand = callNode.GetOperand(operand.Index + 1);
}
else if (operand.IsStackLocal)
{
mappedOperand = MethodCompiler.AddStackLocal(operand.Type, operand.IsPinned);
}
else if (operand.IsVirtualRegister)
{
mappedOperand = AllocateVirtualRegister(operand.Type);
}
else if (operand.IsStaticField)
{
mappedOperand = Operand.CreateField(operand.Field);
}
else if (operand.IsCPURegister)
{
mappedOperand = operand;
}
else if (operand.IsConstant)
{
mappedOperand = operand;
}
Debug.Assert(mappedOperand != null);
map.Add(operand, mappedOperand);
return(mappedOperand);
}
/// <summary>
/// Converts the virtual register to stack local.
/// </summary>
/// <param name="virtualRegister">The virtual register.</param>
/// <returns></returns>
Operand IInstructionDecoder.ConvertVirtualRegisterToStackLocal(Operand virtualRegister)
{
if (virtualRegister.IsStackLocal)
{
return(virtualRegister);
}
int index = 0;
foreach (var op in MethodCompiler.LocalVariables)
{
if (op == virtualRegister)
{
break;
}
index++;
}
var local = Method.LocalVariables[index];
var stackLocal = MethodCompiler.AddStackLocal(local.Type, local.IsPinned);
MethodCompiler.LocalVariables[index] = stackLocal;
//ReplaceOperand(virtualRegister, stackLocal);
foreach (var node in virtualRegister.Uses.ToArray())
{
for (int i = 0; i < node.OperandCount; i++)
{
var op = node.GetOperand(i);
if (virtualRegister == op)
{
node.SetOperand(i, stackLocal);
}
}
}
foreach (var node in virtualRegister.Definitions.ToArray())
{
for (int i = 0; i < node.ResultCount; i++)
{
var op = node.GetResult(i);
if (virtualRegister == op)
{
node.SetResult(i, stackLocal);
}
}
}
return(stackLocal);
}
private Operand Map(Operand operand, Dictionary <Operand, Operand> map, InstructionNode callSiteNode)
{
if (operand == null)
{
return(null);
}
if (map.TryGetValue(operand, out Operand mappedOperand))
{
return(mappedOperand);
}
if (operand.IsSymbol)
{
if (operand.IsString)
{
// FUTURE: explore operand re-use
mappedOperand = Operand.CreateStringSymbol(operand.Name, operand.StringData, operand.Type.TypeSystem);
}
else if (operand.Method != null)
{
// FUTURE: explore operand re-use
mappedOperand = Operand.CreateSymbolFromMethod(operand.Method, operand.Type.TypeSystem);
}
else if (operand.Name != null)
{
// FUTURE: explore operand re-use
mappedOperand = Operand.CreateSymbol(operand.Type, operand.Name);
}
}
else if (operand.IsParameter)
{
mappedOperand = callSiteNode.GetOperand(operand.Index + 1);
}
else if (operand.IsStackLocal)
{
mappedOperand = MethodCompiler.AddStackLocal(operand.Type, operand.IsPinned);
}
else if (operand.IsVirtualRegister)
{
mappedOperand = AllocateVirtualRegister(operand.Type);
}
else if (operand.IsStaticField)
{
// FUTURE: explore operand re-use
mappedOperand = Operand.CreateStaticField(operand.Field, TypeSystem);
}
else if (operand.IsCPURegister)
{
mappedOperand = operand;
}
else if (operand.IsConstant)
{
mappedOperand = operand;
}
Debug.Assert(mappedOperand != null);
if (operand.HasLongParent)
{
MethodCompiler.SplitLongOperand(mappedOperand);
if (operand.IsLow)
{
mappedOperand = mappedOperand.Low;
}
else if (operand.IsHigh)
{
mappedOperand = mappedOperand.High;
}
}
map.Add(operand, mappedOperand);
return(mappedOperand);
}