[Bug target/77881] [5/6/7 Regression] Non-optimal signed comparison on x86_64 since r146817

[matz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77881

--- Comment #2 from Michael Matz <matz at gcc dot gnu.org> ---
Exactly.  Whatever makes it currently work for >=0 should be made to work for
<0 as well.