protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            context.LoadObjByRef();                                 // stack: [&obj]
            il.Call(Type.GetProperty("Value").GetGetMethod());      // stack: [obj.Value]
            context.LoadWriteEmpty();                               // stack: [obj.Value, writeEmpty]
            context.LoadContext();                                  // stack: [obj.Value, writeEmpty, context]
            context.CallSizeCounter(Type.GetGenericArguments()[0]); // stack: [counter(obj.Value, writeEmpty, context)]
        }
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            il.Ldc_I4(9); // stack: [9 = size] 9 = type code + data length + array length

            var count = il.DeclareLocal(typeof(int));

            context.LoadObj();                                                                // stack: [9, obj]
            il.Ldfld(Type.GetField("_size", BindingFlags.Instance | BindingFlags.NonPublic)); // stack: [9, obj.Count]
            il.Stloc(count);                                                                  // count = obj.Count; stack: [9]

            il.Ldloc(count);                                                                  // stack: [9, count]
            var doneLabel = il.DefineLabel("done");

            il.Brfalse(doneLabel); // if(count == 0) goto done; stack: [9]

            var items = il.DeclareLocal(elementType.MakeArrayType());

            context.LoadObj();                                                                 // stack: [9, obj]
            il.Ldfld(Type.GetField("_items", BindingFlags.Instance | BindingFlags.NonPublic)); // stack: [9, obj._items]
            il.Stloc(items);                                                                   // items = obj._items; stack: [9]
            var i = il.DeclareLocal(typeof(int));

            il.Ldc_I4(0); // stack: [9, 0]
            il.Stloc(i);  // i = 0; stack: [9]
            var cycleStartLabel = il.DefineLabel("cycleStart");

            il.MarkLabel(cycleStartLabel);

            il.Ldloc(items);                      // stack: [size, items]
            il.Ldloc(i);                          // stack: [size, items, i]
            il.Ldelem(elementType);
            il.Ldc_I4(1);                         // stack: [size, obj[i], true]
            context.LoadContext();                // stack: [size, obj[i], true, context]
            context.CallSizeCounter(elementType); // stack: [size, writer(obj[i], true, context) = itemSize]
            il.Add();                             // stack: [size + itemSize]
            il.Ldloc(count);                      // stack: [size, length]
            il.Ldloc(i);                          // stack: [size, length, i]
            il.Ldc_I4(1);                         // stack: [size, length, i, 1]
            il.Add();                             // stack: [size, length, i + 1]
            il.Dup();                             // stack: [size, length, i + 1, i + 1]
            il.Stloc(i);                          // i = i + 1; stack: [size, length, i]
            il.Bgt(cycleStartLabel, false);       // if(length > i) goto cycleStart; stack: [size]

            il.MarkLabel(doneLabel);
        }
示例#3
0
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            il.Ldc_I4(9); // stack: [9 = size] 9 = type code + data length + array length

            var doneLabel = il.DefineLabel("done");

            context.LoadObjByRef(); // stack: [size, ref obj]
            il.Ldfld(countField);   // stack: [size, obj._count]
            il.Brfalse(doneLabel);  // if(obj._count == 0) goto done; stack: [size]
            var i   = il.DeclareLocal(typeof(int));
            var end = il.DeclareLocal(typeof(int));

            context.LoadObjByRef(); // stack: [size, ref obj]
            il.Dup();               // stack: [size, ref obj, ref obj]
            il.Ldfld(offsetField);  // stack: [size, ref obj, obj._offset]
            il.Stloc(i);            // i = obj._offset; stack: [size, ref obj]
            il.Ldfld(countField);   // stack: [size, obj._count]
            il.Ldloc(i);            // stack: [size, obj._count, obj._offset]
            il.Add();               // stack: [size, obj._count + obj._offset]
            il.Stloc(end);          // end = obj._count + obj._offset; stack: [size]
            var array = il.DeclareLocal(elementType.MakeArrayType());

            context.LoadObjByRef(); // stack: [size, ref obj]
            il.Ldfld(arrayField);   // stack: [size, obj._array]
            il.Stloc(array);        // array = obj._array; stack: [size]
            var cycleStartLabel = il.DefineLabel("cycleStart");

            il.MarkLabel(cycleStartLabel);
            il.Ldloc(array);                      // stack: [size, array]
            il.Ldloc(i);                          // stack: [size, array, i]
            il.Ldelem(elementType);               // stack: [size, array[i]]
            il.Ldc_I4(1);                         // stack: [size, array[i], true]
            context.LoadContext();                // stack: [size, array[i], true, context]
            context.CallSizeCounter(elementType); // stack: [size, writer(array[i], true, context) = itemSize]
            il.Add();                             // stack: [size + itemSize]
            il.Ldloc(end);                        // stack: [size, end]
            il.Ldloc(i);                          // stack: [size, end, i]
            il.Ldc_I4(1);                         // stack: [size, end, i, 1]
            il.Add();                             // stack: [size, end, i + 1]
            il.Dup();                             // stack: [size, end, i + 1, i + 1]
            il.Stloc(i);                          // i = i + 1; stack: [size, end, i]
            il.Bgt(cycleStartLabel, false);       // if(end > i) goto cycleStart; stack: [size]
            il.MarkLabel(doneLabel);
        }
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il       = context.Il;
            var argument = Type.GetGenericArguments()[0];

            context.LoadObj(); // stack: [obj]
            var factoryField = Type.GetField("m_valueFactory", BindingFlags.Instance | BindingFlags.NonPublic);

            il.Ldfld(factoryField); // stack: [obj.m_valueFactory]
            var factory = il.DeclareLocal(typeof(Func <>).MakeGenericType(argument));

            il.Dup();
            il.Stloc(factory); // factory = obj.m_valueFactory; stack: [factory]
            var countUsual = il.DefineLabel("countUsual");

            il.Brfalse(countUsual); // if(factory == null) goto countUsual; stack: []
            il.Ldloc(factory);      // stack: [factory]
            string targetFieldName = GroBufHelpers.IsMono ? "m_target" : "_target";

            il.Ldfld(typeof(Delegate).GetField(targetFieldName, BindingFlags.Instance | BindingFlags.NonPublic)); // stack: [factory.target]
            var rawData = il.DeclareLocal(typeof(RawData <>).MakeGenericType(Type.GetGenericArguments()));

            il.Isinst(rawData.Type);                                                                         // stack: [factory.target as RawData]
            il.Dup();
            il.Stloc(rawData);                                                                               // rawData = factory.target as RawData; stack: [rawData]
            il.Brfalse(countUsual);                                                                          // if(!(rawData is RawData)) goto countUsual; stack: []
            il.Ldloc(rawData);                                                                               // stack: [rawData]
            il.Ldfld(rawData.Type.GetField("serializerId", BindingFlags.Instance | BindingFlags.NonPublic)); // stack: [rawData.serializerId]
            context.LoadSerializerId();                                                                      // stack: [rawData.serializerId, context.serializerId]
            il.Bne_Un(countUsual);                                                                           // if(rawData.serializerId != context.serializerId) goto countUsual; stack: []
            il.Ldloc(rawData);                                                                               // stack: [rawData]
            il.Ldfld(rawData.Type.GetField("data", BindingFlags.Instance | BindingFlags.NonPublic));         // stack: [rawData.data]
            il.Ldlen();                                                                                      // stack: [rawData.data.Length]
            il.Ret();

            il.MarkLabel(countUsual);
            context.LoadObj();                                                                              // stack: [obj]
            il.Call(Type.GetProperty("Value", BindingFlags.Instance | BindingFlags.Public).GetGetMethod()); // stack: [obj.Value]
            context.LoadWriteEmpty();                                                                       // stack: [obj.Value, writeEmpty]
            context.LoadContext();                                                                          // stack: [obj.Value, writeEmpty, context]
            context.CallSizeCounter(argument);                                                              // stack: [counter(obj.Value, writeEmpty, context)]
        }
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            il.Ldc_I4(5); // stack: [5 = size]

            var genericArguments = Type.GetGenericArguments();

            for (int i = 0; i < genericArguments.Length; ++i)
            {
                var property = Type.GetProperty(i == 7 ? "Rest" : "Item" + (i + 1));
                var getter   = property.GetGetMethod();
                context.LoadObj();                            // stack: [size, obj]
                il.Call(getter);                              // stack: [size, obj.Item{i}]
                il.Ldc_I4(1);                                 // stack: [size, obj.Item{i}, true]
                context.LoadContext();                        // stack: [size, obj.Item{i}, true, context]
                context.CallSizeCounter(genericArguments[i]); // stack: [size, writers[i](obj.Item{i}, true, context) = memberSize]
                il.Add();                                     // stack: [size + memberSize => size]
            }
        }
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            il.Ldc_I4(9); // stack: [9 = size] 9 = type code + data length + array length

            var length = il.DeclareLocal(typeof(int));

            context.LoadObj(); // stack: [9, obj]
            il.Ldlen();        // stack: [9, obj.Length]
            il.Stloc(length);  // length = obj.Length; stack: [9]
            var doneLabel = il.DefineLabel("done");

            il.Ldloc(length);      // stack: [size, length]
            il.Brfalse(doneLabel); // if(length == 0) goto done; stack: [size]
            var i = il.DeclareLocal(typeof(int));

            il.Ldc_I4(0); // stack: [size, 0]
            il.Stloc(i);  // i = 0; stack: [size]
            var cycleStartLabel = il.DefineLabel("cycleStart");

            il.MarkLabel(cycleStartLabel);
            context.LoadObj();                    // stack: [size, obj]
            il.Ldloc(i);                          // stack: [size, obj, i]
            il.Ldelem(elementType);
            il.Ldc_I4(1);                         // stack: [size, obj[i], true]
            context.LoadContext();                // stack: [size, obj[i], true, context]
            context.CallSizeCounter(elementType); // stack: [size, writer(obj[i], true, context) = itemSize]
            il.Add();                             // stack: [size + itemSize]
            il.Ldloc(length);                     // stack: [size, length]
            il.Ldloc(i);                          // stack: [size, length, i]
            il.Ldc_I4(1);                         // stack: [size, length, i, 1]
            il.Add();                             // stack: [size, length, i + 1]
            il.Dup();                             // stack: [size, length, i + 1, i + 1]
            il.Stloc(i);                          // i = i + 1; stack: [size, length, i]
            il.Bgt(cycleStartLabel, false);       // if(length > i) goto cycleStart; stack: [size]
            il.MarkLabel(doneLabel);
        }
        private static KeyValuePair <Delegate, IntPtr> GetCounter(SizeCounterMethodBuilderContext context, Type type)
        {
            var method = new DynamicMethod("CastTo_" + type.Name + "_AndCount_" + Guid.NewGuid(), typeof(int), new[] { typeof(object), typeof(bool), typeof(WriterContext) }, context.Context.Module, true);

            using (var il = new GroboIL(method))
            {
                il.Ldarg(0); // stack: [obj]
                if (type.IsValueType)
                {
                    il.Unbox_Any(type); // stack: [(type)obj]
                }
                else
                {
                    il.Castclass(type); // stack: [(type)obj]
                }
                il.Ldarg(1);            // stack: [(type)obj, writeEmpty]
                il.Ldarg(2);            // stack: [(type)obj, writeEmpty, context]
                context.CallSizeCounter(il, type);
                il.Ret();
            }
            var @delegate = method.CreateDelegate(typeof(SizeCounterDelegate <object>));

            return(new KeyValuePair <Delegate, IntPtr>(@delegate, GroBufHelpers.ExtractDynamicMethodPointer(method)));
        }
示例#8
0
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            il.Ldc_I4(9);      // stack: [9 = size] 9 = type code + data length + hashset count

            context.LoadObj(); // stack: [size, obj]
            var count = il.DeclareLocal(typeof(int));

            il.Ldfld(Type.GetPrivateInstanceField(PlatformHelpers.HashSetCountFieldNames)); // stack: [size, obj.m_lastIndex]
            il.Dup();
            il.Stloc(count);                                                                // count = obj.m_lastIndex; stack: [size, count]
            var doneLabel = il.DefineLabel("done");

            il.Brfalse(doneLabel); // if(!count) goto done; stack: [size]

            context.LoadObj();     // stack: [size, obj]
            var slotType = Type.GetNestedType(PlatformHelpers.HashSetSlotTypeName, BindingFlags.NonPublic).MakeGenericType(Type.GetGenericArguments());
            var slots    = il.DeclareLocal(slotType.MakeArrayType());

            il.Ldfld(Type.GetPrivateInstanceField(PlatformHelpers.HashSetSlotsFieldNames));
            il.Stloc(slots);

            var i = il.DeclareLocal(typeof(int));

            il.Ldc_I4(0); // stack: [9, 0]
            il.Stloc(i);  // i = 0; stack: [9]
            var cycleStartLabel = il.DefineLabel("cycleStart");

            il.MarkLabel(cycleStartLabel);
            il.Ldloc(slots);      // stack: [size, slots]
            il.Ldloc(i);          // stack: [size, slots, i]
            il.Ldelema(slotType); // stack: [size, &slots[i]]
            il.Dup();             // stack: [size, &slots[i], &slots[i]]
            var slot = il.DeclareLocal(slotType.MakeByRefType());

            il.Stloc(slot); // slot = &slots[i]; stack: [size, slot]
            if (PlatformHelpers.IsDotNet50OrGreater)
            {
                il.Ldfld(slotType.GetField("Next")); // stack: [size, slot.Next]
                il.Ldc_I4(-1);                       // stack: [size, slot.Next, -1]
            }
            else
            {
                il.Ldfld(slotType.GetField("hashCode", BindingFlags.Instance | BindingFlags.NonPublic)); // stack: [size, slot.hashCode]
                il.Ldc_I4(0);                                                                            // stack: [size, slot.hashCode, 0]
            }
            var nextLabel = il.DefineLabel("next");

            il.Blt(nextLabel, false);                                                                                                                     // if(slot.hashCode < 0) goto next; stack: [size]

            il.Ldloc(slot);                                                                                                                               // stack: [size, slot]
            il.Ldfld(slotType.GetField(PlatformHelpers.HashSetSlotValueFieldName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)); // stack: [size, slot.value]
            il.Ldc_I4(1);                                                                                                                                 // stack: [size, slot.value, true]
            context.LoadContext();                                                                                                                        // stack: [size, slot.value, true, context]
            context.CallSizeCounter(elementType);                                                                                                         // stack: [size, writer(slot.value, true, context) = valueSize]
            il.Add();                                                                                                                                     // stack: [size + valueSize]

            il.MarkLabel(nextLabel);

            il.Ldloc(count);                // stack: [size, count]
            il.Ldloc(i);                    // stack: [size, count, i]
            il.Ldc_I4(1);                   // stack: [size, count, i, 1]
            il.Add();                       // stack: [size, count, i + 1]
            il.Dup();                       // stack: [size, count, i + 1, i + 1]
            il.Stloc(i);                    // i = i + 1; stack: [size, count, i]
            il.Bgt(cycleStartLabel, false); // if(count > i) goto cycleStart; stack: [size]

            il.MarkLabel(doneLabel);
        }
示例#9
0
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            il.Ldc_I4(9);                                                                     // stack: [9 = size] 9 = type code + data length + dictionary count
            context.LoadObj();                                                                // stack: [size, obj]
            il.Ldfld(Type.GetField("count", BindingFlags.Instance | BindingFlags.NonPublic)); // stack: [size, obj.Count]

            var doneLabel = il.DefineLabel("done");

            il.Brfalse(doneLabel); // if(count == 0) goto done; stack: [size]

            context.LoadObj();     // stack: [size, obj]
            var bucketType   = Type.GetNestedType("bucket", BindingFlags.NonPublic);
            var buckets      = il.DeclareLocal(bucketType.MakeArrayType());
            var bucketsField = Type.GetField("buckets", BindingFlags.Instance | BindingFlags.NonPublic);

            il.Ldfld(bucketsField); // stack: [size, obj.buckets]
            il.Stloc(buckets);      // buckets = obj.buckets; stack: [size]
            var length = il.DeclareLocal(typeof(int));

            il.Ldloc(buckets); // stack: [size, buckets]
            il.Ldlen();        // stack: [size, buckets.Length]
            il.Stloc(length);  // length = buckets.Length

            var i = il.DeclareLocal(typeof(int));

            il.Ldc_I4(0); // stack: [9, 0]
            il.Stloc(i);  // i = 0; stack: [9]
            var cycleStartLabel = il.DefineLabel("cycleStart");

            il.MarkLabel(cycleStartLabel);
            il.Ldloc(buckets);      // stack: [size, buckets]
            il.Ldloc(i);            // stack: [size, buckets, i]
            il.Ldelema(bucketType); // stack: [size, &buckets[i]]
            il.Dup();               // stack: [size, &entries[i], &buckets[i]]
            var bucket = il.DeclareLocal(bucketType.MakeByRefType());

            il.Stloc(bucket);                                                                  // bucket = &buckets[i]; stack: [size, bucket]
            il.Ldfld(bucketType.GetField("key", BindingFlags.Public | BindingFlags.Instance)); // stack: [size, bucket.key]
            il.Dup();                                                                          // stack: [size, bucket.key, bucket.key]
            var key = il.DeclareLocal(typeof(object));

            il.Stloc(key); // key = bucket.key; stack: [size, key]

            var nextLabel = il.DefineLabel("next");

            il.Brfalse(nextLabel);                                                             // if(bucket.key == null) goto next; stack: [size]

            il.Ldloc(key);                                                                     // stack: [size, key]
            context.LoadObj();                                                                 // stack: [size, key, obj]
            il.Ldfld(bucketsField);                                                            // stack: [size, key, obj.buckets]
            il.Beq(nextLabel);                                                                 // if(key == obj.buckets) goto next; stack: [size]

            il.Ldloc(key);                                                                     // stack: [size, key]
            il.Ldc_I4(1);                                                                      // stack: [size, key, true]
            context.LoadContext();                                                             // stack: [size, key, true, context]
            context.CallSizeCounter(typeof(object));                                           // stack: [size, writer(key, true, context) = keySize]
            il.Add();                                                                          // stack: [size + keySize]

            il.Ldloc(bucket);                                                                  // stack: [size, bucket]
            il.Ldfld(bucketType.GetField("val", BindingFlags.Public | BindingFlags.Instance)); // stack: [size, bucket.val]
            il.Ldc_I4(1);                                                                      // stack: [size, bucket.val, true]
            context.LoadContext();                                                             // stack: [size, bucket.val, true, context]
            context.CallSizeCounter(typeof(object));                                           // stack: [size, writer(bucket.val, true, context) = valueSize]
            il.Add();                                                                          // stack: [size + valueSize]

            il.MarkLabel(nextLabel);
            il.Ldloc(length);               // stack: [size, length]
            il.Ldloc(i);                    // stack: [size, length, i]
            il.Ldc_I4(1);                   // stack: [size, length, i, 1]
            il.Add();                       // stack: [size, length, i + 1]
            il.Dup();                       // stack: [size, length, i + 1, i + 1]
            il.Stloc(i);                    // i = i + 1; stack: [size, length, i]
            il.Bgt(cycleStartLabel, false); // if(length > i) goto cycleStart; stack: [size]

            il.MarkLabel(doneLabel);
        }
示例#10
0
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            il.Ldc_I4(9);      // stack: [9 = size] 9 = type code + data length + dictionary count
            context.LoadObj(); // stack: [size, obj]
            var count = il.DeclareLocal(typeof(int));

            // traverse all buckets
            il.Ldfld(Type.GetField("count", BindingFlags.Instance | BindingFlags.NonPublic)); // stack: [size, obj.Count]
            il.Stloc(count);                                                                  // count = obj.Count; stack: [size]

            var doneLabel = il.DefineLabel("done");

            il.Ldloc(count);       // stack: [size, count]
            il.Brfalse(doneLabel); // if(count == 0) goto done; stack: [size]

            context.LoadObj();     // stack: [size, obj]
            var entryType = Type.GetNestedType("Entry", BindingFlags.NonPublic).MakeGenericType(Type.GetGenericArguments());
            var entries   = il.DeclareLocal(entryType.MakeArrayType());

            il.Ldfld(Type.GetField("entries", BindingFlags.Instance | BindingFlags.NonPublic));
            il.Stloc(entries);

            var i = il.DeclareLocal(typeof(int));

            il.Ldc_I4(0); // stack: [9, 0]
            il.Stloc(i);  // i = 0; stack: [9]
            var cycleStartLabel = il.DefineLabel("cycleStart");

            il.MarkLabel(cycleStartLabel);
            il.Ldloc(entries);     // stack: [size, entries]
            il.Ldloc(i);           // stack: [size, entries, i]
            il.Ldelema(entryType); // stack: [size, &entries[i]]
            il.Dup();              // stack: [size, &entries[i], &entries[i]]
            var entry = il.DeclareLocal(entryType.MakeByRefType());

            il.Stloc(entry);                          // entry = &entries[i]; stack: [size, entry]
            il.Ldfld(entryType.GetField("hashCode")); // stack: [size, entry.hashCode]
            il.Ldc_I4(0);                             // stack: [size, entry.hashCode, 0]
            var nextLabel = il.DefineLabel("next");

            il.Blt(nextLabel, false);              // if(entry.hashCode < 0) goto next; stack: [size]

            il.Ldloc(entry);                       // stack: [size, entry]
            il.Ldfld(entryType.GetField("key"));   // stack: [size, entry.key]
            il.Ldc_I4(1);                          // stack: [size, entry.key, true]
            context.LoadContext();                 // stack: [size, entry.key, true, context]
            context.CallSizeCounter(keyType);      // stack: [size, writer(entry.key, true, context) = keySize]
            il.Add();                              // stack: [size + keySize]

            il.Ldloc(entry);                       // stack: [size, entry]
            il.Ldfld(entryType.GetField("value")); // stack: [size, entry.value]
            il.Ldc_I4(1);                          // stack: [size, entry.value, true]
            context.LoadContext();                 // stack: [size, entry.value, true, context]
            context.CallSizeCounter(valueType);    // stack: [size, writer(entry.value, true, context) = valueSize]
            il.Add();                              // stack: [size + valueSize]

            il.MarkLabel(nextLabel);
            il.Ldloc(count);                // stack: [size, count]
            il.Ldloc(i);                    // stack: [size, count, i]
            il.Ldc_I4(1);                   // stack: [size, count, i, 1]
            il.Add();                       // stack: [size, count, i + 1]
            il.Dup();                       // stack: [size, count, i + 1, i + 1]
            il.Stloc(i);                    // i = i + 1; stack: [size, count, i]
            il.Bgt(cycleStartLabel, false); // if(count > i) goto cycleStart; stack: [size]

            il.MarkLabel(doneLabel);
        }
示例#11
0
        protected override void CountSizeNotEmpty(SizeCounterMethodBuilderContext context)
        {
            var il = context.Il;

            il.Ldc_I4(0); // stack: [0 = size]

            var dataMembers = context.Context.GetDataMembers(Type);

            foreach (var member in dataMembers)
            {
                if (Type.IsValueType)
                {
                    context.LoadObjByRef(); // stack: [size, ref obj]
                }
                else
                {
                    context.LoadObj(); // stack: [size, obj]
                }
                Type memberType;
                switch (member.Member.MemberType)
                {
                case MemberTypes.Property:
                    var property = (PropertyInfo)member.Member;
                    var getter   = property.GetGetMethod(true);
                    if (getter == null)
                    {
                        throw new MissingMethodException(Type.Name, property.Name + "_get");
                    }
                    il.Call(getter, Type); // stack: [size, obj.prop]
                    memberType = property.PropertyType;
                    break;

                case MemberTypes.Field:
                    var field = (FieldInfo)member.Member;
                    il.Ldfld(field); // stack: [size, obj.field]
                    memberType = field.FieldType;
                    break;

                default:
                    throw new NotSupportedException("Data member of type " + member.Member.MemberType + " is not supported");
                }
                il.Ldc_I4(0);                        // stack: [size, obj.member, false]
                context.LoadContext();               // stack: [size, obj.member, false, context]
                context.CallSizeCounter(memberType); // stack: [size, writers[i](obj.member, false, context) = memberSize]
                il.Dup();                            // stack: [size, memberSize, memberSize]
                var nextLabel = il.DefineLabel("next");
                il.Brfalse(nextLabel);               // if(memberSize = 0) goto next; stack: [size, memberSize]

                il.Ldc_I4(8);                        // stack: [size, memberSize, 8]
                il.Add();                            // stack: [size, memberSize + 8]
                il.MarkLabel(nextLabel);
                il.Add();                            // stack: [size + curSize]
            }

            if (!context.Context.GroBufWriter.Options.HasFlag(GroBufOptions.WriteEmptyObjects))
            {
                var countLengthLabel = il.DefineLabel("countLength");
                il.Dup();                    // stack: [size, size]
                il.Brtrue(countLengthLabel); // if(size != 0) goto countLength; stack: [size]
                il.Pop();                    // stack: []
                context.ReturnForNull();
                il.Ret();
                il.MarkLabel(countLengthLabel);
            }
            il.Ldc_I4(5); // stack: [size, 5]
            il.Add();     // stack: [size + 5]
        }