VLA is a known issue for a long time.GCC doesn't have too much cse optimization forVLA vectors. It should be a big work to investigate what's going on.I think most cse optimization for precomputed result are vls loop. So I think as long as we can do a good job on cost model which pick appropriate vls loop. It's not big issue and not high priority for me. Replied Message FromRobin DappDate01/12/2024 18:10 ToJuzhe-Zhong,gcc-patches@gcc.gnu.org Ccrdapp@gmail.com,kito.ch...@gmail.com,kito.ch...@sifive.com,jeffreya...@gmail.comSubjectRe: [PATCH V3] RISC-V: Adjust scalar_to_vec cost> Tested on both RV32/RV64 no regression, Ok for trunk ?
Yes, thanks!
Btw out of curiosity, did you see why we actually fail to
optimize away the VLA loop? We should open a bug for that
I suppose.
Regards
Robin
