[Bug c/94389] __attribute__((warn_unused_result)) will warn if the result is discarded as an optimisation

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94389

--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The language frontend shouldn't do this kind of code transformations, whether
you think the warning should warn or not here, imo.