https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128162
--- Comment #4 from Li Pan <pan2.li at intel dot com> --- Find another issue talked about vwmacc, the the different-source-EEW rule still apply I bet. I will revert the changes one-by-one about this. https://github.com/riscv-software-src/riscv-isa-sim/issues/1976
