public virtual void ComputeAssignableRegisters()
{
instructionGraph.AssignableRegisters.Clear();
Queue registerValues = new Queue();
foreach (ValueNode val in instructionGraph.GetValueNodes()) {
if (val is RegisterValueNode)
registerValues.Enqueue(val);
}
while (registerValues.Count > 0) {
ValueNode val = (ValueNode) registerValues.Dequeue();
RegisterSet assignableRegs;
if (ProgramGraph.PreassignedRegisters[val] != null) {
assignableRegs = new RegisterSet();
assignableRegs.Add(
(Register) ProgramGraph.PreassignedRegisters[val]);
} else {
assignableRegs =
ComputeAssignableRegistersForValue(val, registerValues);
}
instructionGraph.AssignableRegisters[val] = assignableRegs;
}
}
