[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 #20 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #18)
> Simple answer:
> When the INTEGER_CST (unsigned short) is expanded into a const_int, the sign
> extend happens due to the rules of const_int.

What does that mean?!