Hi Kewen, > I did a bootstrapping and regression testing on Power10 (LE) and found a lot > of failures.
I think the problem is that just like for vec_set we're expecting the vec_extract expander not to fail. It is probably passed not a const int here anymore and therefore fails to expand? can_vec_extract_var_idx_p is supposed to check if the backend supports extracting a variable index. Regards Robin