[Bug target/111311] RISC-V regression testsuite errors with --param=riscv-autovec-preference=scalable

[juzhe.zhong at rivai dot ai via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111311

--- Comment #12 from JuzheZhong <juzhe.zhong at rivai dot ai> ---
signbit execution issue should be ignored. It's ISA issue not compiler issue.

I knew this issue long time ago and confirm Clang has the sam issue:

https://github.com/riscv-collab/riscv-gnu-toolchain/issues/1075