[clang] [llvm] [RISCV] Support version 0.9 of Zvabd (PR #218576)

[via cfe-commits]

renndong wrote:

ISelLowering also needs to be modified? vabd/vabdu supports all SEWs now: https://github.com/riscv/riscv-isa-manual/pull/3279#issuecomment-5352397978

https://github.com/llvm/llvm-project/blob/a8be9a553145c48fb3beda0d4604ae750d42d32c/llvm/lib/Target/RISCV/RISCVISelLowering.cpp#L1127-L1132

https://github.com/llvm/llvm-project/pull/218576