private void LinearizePath(MethodDefData pMethodDefData, IRInstruction pStartInstruction, Stack <IRStackObject> pStack, Queue <Tuple <IRInstruction, Stack <IRStackObject> > > pBranches)
{
int stackReturn = pStack.Count;
IRInstruction currentInstruction = pStartInstruction;
MethodDefData.MethodDefBodyData.MethodDefBodyExceptionData exceptionData = null;
while (currentInstruction != null)
{
if (currentInstruction.Linearized && pStack.Count == stackReturn)
{
break;
}
if ((exceptionData = Array.Find(pMethodDefData.Body.Exceptions, e => e.Flags == 0 && e.HandlerOffset == currentInstruction.ILOffset)) != null)
{
IRType exceptionType = Assembly.AppDomain.PresolveType(Assembly.File.ExpandMetadataToken(exceptionData.ClassTokenOrFilterOffset));
IRStackObject exceptionObj = new IRStackObject();
exceptionObj.Type = exceptionType;
exceptionObj.LinearizedTarget = new IRLinearizedLocation(IRLinearizedLocationType.Local);
exceptionObj.LinearizedTarget.Local.LocalIndex = currentInstruction.AddLinearizedLocal(pStack, exceptionType);
pStack.Push(exceptionObj);
}
currentInstruction.Linearize(pStack);
currentInstruction.Linearized = true;
switch (currentInstruction.Opcode)
{
case IROpcode.Branch:
{
IRBranchInstruction branchInstruction = (IRBranchInstruction)currentInstruction;
if (branchInstruction.BranchCondition == IRBranchCondition.Always)
{
currentInstruction = branchInstruction.TargetIRInstruction;
}
else
{
pBranches.Enqueue(new Tuple <IRInstruction, Stack <IRStackObject> >(branchInstruction.TargetIRInstruction, pStack.Duplicate()));
currentInstruction = Instructions[currentInstruction.IRIndex + 1];
}
break;
}
case IROpcode.Switch:
{
IRSwitchInstruction switchInstruction = (IRSwitchInstruction)currentInstruction;
foreach (IRInstruction targetInstruction in switchInstruction.TargetIRInstructions)
{
pBranches.Enqueue(new Tuple <IRInstruction, Stack <IRStackObject> >(targetInstruction, pStack.Duplicate()));
}
currentInstruction = Instructions[currentInstruction.IRIndex + 1];
break;
}
case IROpcode.Leave:
{
IRLeaveInstruction leaveInstruction = (IRLeaveInstruction)currentInstruction;
currentInstruction = leaveInstruction.TargetIRInstruction;
break;
}
case IROpcode.Jump:
case IROpcode.Throw:
case IROpcode.Return: currentInstruction = null; break;
default: currentInstruction = currentInstruction.IRIndex >= Instructions.Count ? null : Instructions[currentInstruction.IRIndex + 1]; break;
}
}
}