/// <summary>
/// Retrieves the local stack operand at the specified <paramref name="index"/>.
/// </summary>
/// <param name="index">The index of the stack operand to retrieve.</param>
/// <returns>The operand at the specified index.</returns>
/// <exception cref="System.ArgumentOutOfRangeException">The <paramref name="index"/> is not valid.</exception>
public Operand GetLocalOperand(int index)
{
// HACK: Returning a new instance here breaks object identity. We should reuse operands,
// which represent the same memory location. If we need to move a variable in an optimization
// stage to a different memory location, it should actually be a new one so sharing object
// only saves runtime space/perf.
// PG: Isn't that implemented below? Comment seems out of date with code
Debug.Assert(localsSig != null, @"Method doesn't have locals.");
Debug.Assert(index < localsSig.Locals.Length, @"Invalid local index requested.");
if (localsSig == null || localsSig.Locals.Length < index)
throw new ArgumentOutOfRangeException(@"index", index, @"Invalid parameter index");
Operand local = locals[index];
if (local == null)
{
VariableSignature localVariable = localsSig.Locals[index];
//ScheduleDependencyForCompilation(localVariable.Type);
local = new LocalVariableOperand(architecture.StackFrameRegister, String.Format("L_{0}", index), index, localVariable.Type);
locals[index] = local;
}
return local;
}
/// <summary>
/// Allocates the stack operand.
/// </summary>
/// <param name="type">The type.</param>
/// <returns></returns>
public StackOperand AllocateStackOperand(SigType type, bool localVariable)
{
int stackSlot = stack.Count + 1;
StackOperand stackOperand;
if (localVariable)
{
stackOperand = new LocalVariableOperand(architecture.StackFrameRegister, String.Format("V_{0}", stackSlot), stackSlot, type);
}
else
{
stackOperand = new StackTemporaryOperand(architecture.StackFrameRegister, String.Format("T_{0}", stackSlot), stackSlot, type);
}
stack.Add(stackOperand);
return stackOperand;
}
/// <summary>
/// Allocates the stack operand.
/// </summary>
/// <param name="type">The type.</param>
/// <returns></returns>
public StackOperand AllocateStackOperand(SigType type)
{
int stackSlot = stack.Count + 1;
LocalVariableOperand local = new LocalVariableOperand(architecture.StackFrameRegister, String.Format("L_{0}", stackSlot), stackSlot, type);
stack.Add(local);
return local;
}
