[Bug target/115995] RISC-V: Can't generate portable RVV code for rv64gcv_zvl512b

[kito at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115995

--- Comment #3 from Kito Cheng <kito at gcc dot gnu.org> ---
We have an internal qemu patch for adding an option to trigger this damm
behavior by default, and plan to upstream soon...let me ask our Qemu folk if I
can get the patch out first.