[llvm-dev] [RFC] Adding a cls intrinsic for AArch64

[Eric Christopher via llvm-dev]

On Wed, Oct 4, 2017 at 10:19 AM Davide Italiano via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> On Thu, Sep 28, 2017 at 1:35 PM, Davide Italiano <davide at freebsd.org>
> wrote:
> > I'm not entirely sure whether this is worth an RFC, but, just in case.
> > On bugzilla Eli pointed out we currently match a specific sequence of
> > instructions to cls (
> > https://reviews.llvm.org/rL206079), and given how fragile this is, it
> > could be better to just introduce an intrinsic for it (and presumably,
> > teach peephole optimizations to lower a sequence to that intrinsic).
> > I wonder what folks are OK with the new intrinsic.
> > If there are no strong objections, I'll proceed with a patch.
> >
>

No strong objections. :)

-eric


> > Thanks,
> >
> > --
> > Davide
>
> No comments, I'll take that as a sign I can go ahead :)
>
> --
> Davide
>
> "There are no solved problems; there are only problems that are more
> or less solved" -- Henri Poincare
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