On 05.07.2023 10:47, Hongtao Liu wrote: > On Wed, Jul 5, 2023 at 4:01 PM Jan Beulich via Gcc-patches > <gcc-patches@gcc.gnu.org> wrote: >> >> V2TImode values cannot appear in the upper 16 YMM registers without >> AVX512VL being enabled. Therefore forcing 512-bit mode (also not >> reflected in the "mode" attribute) is pointless. > Please set isa attribute for alternative 1 to avx512vl.
Since that looks redundant to me (as per the description), would you mind explaining why that's necessary / wanted? It also feels orthogonal to the change I'm making, as there was no "isa" attribute so far (which would have wanted to be "avx512f" as per what you ask for, prior to the change I'm making). Again me asking back is primarily to properly describe the changes I'm making, of course along with me still needing to properly understand when what attribute needs specifying explicitly. Jan
