[Bug middle-end/85344] constants with the sign bit set causes sign extension which is unexpected but not documented in the user documentation

[segher at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85344

--- Comment #19 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So, apparently force_reg was called here, and it went way down from there.  It
never should have ended up there, but it is a very common thing, there are tens
of ways to get there, no clue what happened!