_d_newitemU

Allocate an uninitialized non-array item.

This is an optimization to avoid things needed for arrays like the __arrayPad(size).

- _d_newitemU leaves the item uninitialized - _d_newitemT zero initializes the item - _d_newitemiT uses a non-zero initializer from TypeInfo

Used to allocate struct instances on the heap.

struct Sz {int x = 0;}
struct Si {int x = 3;}

void main()
{
    new Sz(); // _d_newitemT(typeid(Sz))
    new Si(); // _d_newitemiT(typeid(Si))
}