I am working on that, it seems the cost of vsetvli instruction become 0 due
to this change, then loop invariant motion won't hoist vsetvli longer.

Jeff Law <jeffreyalaw@gmail.com> 於 2023年8月3日 週四 21:49 寫道：

>
>
> On 8/3/23 03:27, juzhe.zhong@rivai.ai wrote:
> >
> https://github.com/gcc-mirror/gcc/commit/e15d0b6680d10d7666195e9db65581364ad5e5df
> <
> https://github.com/gcc-mirror/gcc/commit/e15d0b6680d10d7666195e9db65581364ad5e5df
> >
> >
> > This patch causes so many fails in the regression:
> Mine.  I'll take care of it.  Probably something slipping through the
> expander that shouldn't.  I've been primarily focused on the execute.exp
> part of the suite to find code correctness issues with the original patch.
>
> jeff
>