protected virtual void InsertTransferInstructionBefore(
ValueNode val, Register fromReg, Register toReg,
RegisterSet fromSet, RegisterSet toSet)
{
IList applicableTransferInstr =
GetTransferInstructions(fromReg, toReg);
ValueNode newVal = new RegisterValueNode(val.Datatype);
instructionGraph.AddNode(newVal);
if (!val.IsInputValue()) {
InstructionNode prodInstr = val.ProducingInstruction;
instructionGraph.RemoveEdge(prodInstr, val);
instructionGraph.AddEdge(prodInstr, newVal);
}
Instruction transferInstr =
(Instruction) applicableTransferInstr[
GA.Random.Next(applicableTransferInstr.Count)];
InstructionNode transferNode =
new InstructionNode(transferInstr);
instructionGraph.AddNode(transferNode);
instructionGraph.AddEdge(newVal, transferNode);
instructionGraph.AddEdge(transferNode, val);
instructionGraph.AssignableRegisters[val] = toSet;
instructionGraph.AssignableRegisters[newVal] = fromSet;
}
protected ValueNode InsertTransferInstruction(
ValueNode val, InstructionNode consInstr,
RegisterSet assignableRegs)
{
ValueNode newVal = new RegisterValueNode(val.Datatype);
instructionGraph.AddNode(newVal);
instructionGraph.ReplaceEdgeStart(val, consInstr, newVal);
IList applicableTransferInstr = new ArrayList();
foreach (Instruction instr in TransferInstructions) {
RegisterSet instrRegs = instr.OperandsRegisters[0];
if ((assignableRegs * instrRegs).Count > 0)
applicableTransferInstr.Add(instr);
}
int selectedIndex =
GA.Random.Next(applicableTransferInstr.Count);
Instruction selectedInstr =
(Instruction) applicableTransferInstr[selectedIndex];
InstructionNode transferInstr =
new InstructionNode(selectedInstr);
instructionGraph.AddNode(transferInstr);
instructionGraph.AddEdge(val, transferInstr);
instructionGraph.AddEdge(transferInstr, newVal);
return newVal;
}
