Add some alignment info where LLVM might otherwise be more pessimistic. In particular, %.nest_arg is always aligned even though it's bitcast from i8*. Pointers in vtables are also guaranteed to be stored at aligned addresses.

// ifloat

module typeinfo1.ti_ifloat;

private import typeinfo1.ti_float;

class TypeInfo_o : TypeInfo_f
{
    char[] toString() { return "ifloat"; }
}