public override bool OptimizeBlock(CilMethodInterpreter midRepresentation, int startRange, int endRange,
LocalOperation[] operations)
{
var localOperations = midRepresentation.MidRepresentation.LocalOperations;
var calls = FindCallsToPureFunctions(midRepresentation.MidRepresentation.UseDef, startRange, endRange);
if (calls.Count < 2)
{
return(false);
}
for (var i = 0; i < calls.Count - 1; i++)
{
var firstMethodData = PrecomputeRepeatedUtils.GetMethodData(localOperations, calls, i);
for (var j = i + 1; j < calls.Count; j++)
{
var secondMethodData = PrecomputeRepeatedUtils.GetMethodData(localOperations, calls, j);
if (firstMethodData.Info != secondMethodData.Info)
{
continue;
}
var resultMerge = TryMergeCalls(i, j, firstMethodData, secondMethodData, localOperations);
if (!resultMerge)
{
continue;
}
ApplyOptimization(midRepresentation, calls[i], calls[j]);
return(true);
}
}
return(false);
}
private static void ApplyOptimization(CilMethodInterpreter midRepresentation, int i, int j)
{
var localOps = midRepresentation.MidRepresentation.LocalOperations;
var srcMethod = PrecomputeRepeatedUtils.GetMethodData(localOps, i);
var destMethod = PrecomputeRepeatedUtils.GetMethodData(localOps, j);
if (srcMethod.Result == null)
{
return;
}
var computedType = srcMethod.Result.ComputedType();
var newVreg = midRepresentation.CreateCacheVariable(computedType);
var assignedTo = srcMethod.Result;
var localOperation = PrecomputeRepeatedUtils.CreateAssignLocalOperation(assignedTo, newVreg);
localOps.Insert(i + 1, localOperation);
srcMethod.Result = newVreg;
var destAssignment = PrecomputeRepeatedUtils.CreateAssignLocalOperation(destMethod.Result, newVreg);
localOps.RemoveAt(j + 1);
localOps.Insert(j + 1, destAssignment);
}
static void ApplyOptimization(CilMethodInterpreter interpreter, int i, int j)
{
var localOps = interpreter.MidRepresentation.LocalOperations;
var firstOperator = localOps[i].GetBinaryOperator();
var secondOperator = localOps[j].GetBinaryOperator();
var newVreg = interpreter.CreateCacheVariable(firstOperator.ComputedType());
var assignLocalOperation = PrecomputeRepeatedUtils.CreateAssignLocalOperation(firstOperator.AssignedTo,
newVreg);
localOps.Insert(i + 1, assignLocalOperation);
firstOperator.AssignedTo = newVreg;
var destAssignment = PrecomputeRepeatedUtils.CreateAssignLocalOperation(secondOperator.AssignedTo, newVreg);
localOps.RemoveAt(j + 1);
localOps.Insert(j + 1, destAssignment);
}
private static void ApplyOptimization(CilMethodInterpreter midRepresentation, int i, int j)
{
var localOps = midRepresentation.MidRepresentation.LocalOperations;
var firstOperator = localOps[i].Get <GetField>();
var secondOperator = localOps[j].Get <GetField>();
var newVreg =
midRepresentation.CreateCacheVariable(firstOperator.AssignedTo.ComputedType());
var assignLocalOperation = PrecomputeRepeatedUtils.CreateAssignLocalOperation(firstOperator.AssignedTo,
newVreg);
localOps.Insert(i + 1, assignLocalOperation);
firstOperator.AssignedTo = newVreg;
var destAssignment = PrecomputeRepeatedUtils.CreateAssignLocalOperation(secondOperator.AssignedTo, newVreg);
localOps[j + 1] = destAssignment;
}