[Bug target/122448] [15/16 Regression] Wrong rvv code with -O3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122448

--- Comment #8 from Robin Dapp <rdapp at gcc dot gnu.org> ---
Starting to come to a "how could this ever work" moment ;)

Testing a patch.