Break down a D type into basic (register) types for the Itanium C++ ABI.
This breaks a type down into 'simpler' types that can be passed to a function in registers, and returned in registers. It's highly platform dependent.
See Source File _argtypes.d Documentation: https://dlang.org/phobos/dmd_argtypes.html Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/argtypes.d
Walter Bright
Copyright (C) 1999-2020 by The D Language Foundation, All Rights Reserved
Boost License 1.0
Break down a D type into basic (register) types for the Itanium C++ ABI.