[Bug target/94420] [8/9/10 Regression] ICE error: insn does not satisfy its constraints

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94420

--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It is undefined behaviour to access such a register in any way -- sure,
you *can* inspect it, there just is no guarantee at all what value you
will get.

It still is a useful thing to do in debug code and the like, of course.