[Bug c++/77456] Suboptimal code when returning a string generated with a constexpr fn at compile time

[petschy at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77456

--- Comment #2 from petschy at gmail dot com ---
#22141 does not mention a DSE issue, nor a segfault of the compiler, so hardly
an exact duplicate.