[Bug inline-asm/98262] Internal compiler error when clobbering m68k frame pointer in extended asm

[thomasj at thomasjager dot ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98262

--- Comment #3 from Thomas Jager <thomasj at thomasjager dot ca> ---
I've now had the same `gcc_unreachable` reached when compiling code that uses
`-mpcrel` with a thread-local variable. It may be that `m68k_decompose_address`
doesn't properly handle all cases, or that something generated earlier that is
passed to it is bad.