<div dir="ltr"><div class="gmail_default" style="font-size:small"><font face="arial, helvetica, sans-serif">Hi Michael,</font></div><div class="gmail_default" style="font-size:small"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default" style="font-size:small"><font face="arial, helvetica, sans-serif">The intrinsics are still technically in an experimental state as we need to have a further discussion to build consensus before marking them as fully supported.</font></div><div class="gmail_default" style="font-size:small"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">The AArch64 backend has been using them for all *natively supported* vector reductions for a few months now, with no issues as far as I'm aware. There are some rough edges which need some further work. For example, we're currently relying on a TTI hook to determine whether or not we create an intrinsic call or degenerate into a shuffevector sequence based on the reduction type. This was intended as a transitional stage. To mark the intrinsics as being first class operations we probably need to add support in codegen to expand the VECREDUCE_* nodes into the shufflevector reduction pattern, so that targets can generate the intrinsics in all cases without having to rely on TTI.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">Amara</font></div><div class="gmail_default"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 3 August 2017 at 12:03, Haidl, Michael via llvm-dev <span dir="ltr"><<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I was wandering about the status of the<br>
llvm.experimental.vector.<wbr>reduce.* intrinsics. Are all back-ends<br>
supporting those intrinsics or are they still in a very "experimental"<br>
state?<br>
<br>
Thanks,<br>
Michael<br>
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