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

[james.molloy at arm dot com]

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

--- Comment #9 from James Molloy <james.molloy at arm dot com> ---
OK, given your second example I agree that the usecase isn't quite as
pathological as I thought.

> I'm not saying I'll never accept a warning for this sort of code; but I'd need
convincing that it won't unduly pessimize real code with no acceptable
work-arounds.

Clang is committed to this warning as our community feels the error detection
rate makes up for the lack of raw power. So unless we actively do something the
two compilers will always differ in approach which probably isn't best for our
users.

Would you be opposed to discussing a constraint modifier to mean "implicitly
extend to 64-bits"?