https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112438

Kito Cheng <kito at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kito at gcc dot gnu.org

--- Comment #1 from Kito Cheng <kito at gcc dot gnu.org> ---
Actually I suspect that should be a bug rather than missed-optimization, that
will only trigger on some CPU implementation, because ISA spec didn't guarantee
penultimate iteration will always got VLMAX for vl...

https://github.com/riscv/riscv-v-spec/blob/master/v-spec.adoc#63-constraints-on-setting-vl

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