[Bug target/63359] aarch64: 32bit registers in inline asm

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63359

--- Comment #12 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
We considered that, but it won't work.  For example, in ILP32 address registers
need to use the X form, but are still 32-bits in size.  There are other cases
as well where a W or X form is required but that is not the natural size of the
object.