[Bug target/122321] [16 Regression] RISC-V rv64gcv: crash at -O0

[xxs_chy at outlook dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122321

--- Comment #1 from XChy <xxs_chy at outlook dot com> ---
Godbolt reproducer on trunk: https://godbolt.org/z/ahYro4Tox