https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80115
--- Comment #7 from Frank Ch. Eigler <fche at redhat dot com> --- The systemtap operand encoding machinery separately gives us the byte-size of the operand, so even if gcc told us %si, we'd only look at %sil only anyway. But if gcc cannot let that level of ambiguity be, then I guess we must work around the change. In the sdt.h, we enjoyed using machine-independent operant-constraint codes - until now, I guess.