/// <summary>
/// Default ctor
/// </summary>
public RegisterMapper(MethodBody body, InvocationFrame frame)
{
this.frame = frame;
// Select all non-argument registers that are in use.
Dictionary<Register, RegisterFlags> used;
int maxOutgoingRegisters;
bool largeInvokeInsFound;
GetUsedArgumentRegisters(body, out used, out maxOutgoingRegisters, out largeInvokeInsFound);
//var used = body.Registers.Where(x => (x.Category != RCategory.Argument) && body.Instructions.Uses(x)).ToList();
var sorted = used.OrderBy(x => x.Value).ThenBy(x => x.Key.Index).Select(x => x.Key).ToList();
AddKeepWithNext(sorted, body);
// Collect argument registers
var arguments = body.Registers.Where(x => x.Category == RCategory.Argument).ToList();
// Prepare various decisions
//var maxOutgoingRegisters = body.Instructions.Max(x => x.Code.IsInvoke() ? x.Registers.Count : 0);
var required = sorted.Count + arguments.Count;
//var largeInvokeInsFound = body.Instructions.Any(x => x.Code.IsInvoke() && x.Registers.Count > 5);
// Allocate Dex registers for each
var index = 0;
// Allocate spill registers (if needed)
if ((required >= 16) || (largeInvokeInsFound && (required + maxOutgoingRegisters >= 16)))
{
spillRangeRegisters = new DexLib.Instructions.Register[MaxSpillRegisters];
for (var i = 0; i < MaxSpillRegisters; i++)
{
spillRangeRegisters[i] = new DexLib.Instructions.Register(index++);
}
}
// Allocate Dex registers for each temp register.
foreach (var r in sorted)
{
var dreg = new DexLib.Instructions.Register(index++);
map[r] = dreg;
dRegisterTypes[dreg] = r.Type;
}
// Allocate outgoing invocation frame (if needed)
if ((required >= 16) || largeInvokeInsFound)
{
invokeRangeRegisters = new DexLib.Instructions.Register[maxOutgoingRegisters];
for (var i = 0; i < maxOutgoingRegisters; i++)
{
invokeRangeRegisters[i] = new DexLib.Instructions.Register(index++);
}
}
// Allocate Dex registers for each argument
foreach (var r in arguments)
{
var dreg = new DexLib.Instructions.Register(index++);
map[r] = dreg;
dRegisterTypes[dreg] = r.Type;
}
ArgumentCount = arguments.Count;
}
/// <summary>
/// Default ctor
/// </summary>
public DexCompiler(RL.MethodBody rlBody, MethodBody dexBody, InvocationFrame frame)
{
this.rlBody = rlBody;
this.dexBody = dexBody;
this.frame = frame;
}