llvm dev - Jun 2020 - Unroll-and-Jam

Hi-

I am looking to see whether UnJ can be applied to an outer loop with multiple
inner nested loops like the one below. It looks like only a single inner loop is
supported right now. Am I missing something ?

-Thx
Dibyendu


#pragma allow_unroll_and_jam unroll_and_jam_count(4)
for (int w = ws; w < we; w += wst) {
            (...)
            for (int d = ds ; (d < de); d += dst) {
            }
            (...)
            for (int d = ds; (d < de); d += dst) {
            }
            (...)
}
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This is correct, LoopUnrollAndJam can only jam a single loop per level.

Michael

Am Mo., 8. Juni 2020 um 06:08 Uhr schrieb Das, Dibyendu via llvm-dev
<llvm-dev at lists.llvm.org>:
>
> Hi-
>
>
>
> I am looking to see whether UnJ can be applied to an outer loop with
multiple inner nested loops like the one below. It looks like only a single
inner loop is supported right now. Am I missing something ?
>
>
>
> -Thx
>
> Dibyendu
>
>
>
>
>
> #pragma allow_unroll_and_jam unroll_and_jam_count(4)
>
> for (int w = ws; w < we; w += wst) {
>
>             (...)
>
>             for (int d = ds ; (d < de); d += dst) {
>
>             }
>
>             (...)
>
>             for (int d = ds; (d < de); d += dst) {
>
>             }
>
>             (...)
>
> }
>
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