[Bug target/80115] [7 Regression] OpenJDK 1.8 fails to build

[fche at redhat dot com]

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.