[Bug c++/103699] Reading or writing a constant unaligned value is wrongly optimized causing an incorrect result (GCC-11 and up)

[kobalicek.petr at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103699

--- Comment #3 from Petr <kobalicek.petr at gmail dot com> ---
BTW this almost seems like an optimizer bug, because if you compile the code
without optimizations with GCC 11 (or with -O1) it also returns the expected
value - only optimized compilation with GCC 11 returns the wrong one.