[PATCH] D68535: Fix loop unrolling initialization in the new pass manager

[Eric Christopher via cfe-commits]

Thanks for the text - I didn't have anything to add or change so I
just used it verbatim :)

Committed thusly:

Committed revision 374838.
Committed f64329154c3 to svn.

On Mon, Oct 7, 2019 at 9:36 AM Alina Sbirlea via Phabricator
<reviews at reviews.llvm.org> wrote:
>
> asbirlea added a comment.
>
> Maybe elaborate in the patch description what `determine when and how we will unroll loops.` means?
> e.g.:
> "The default before and after this patch is for LoopUnroll to be enabled, and for it to use a cost model to determine whether to unroll the loop (`OnlyWhenForced = false`). Before this patch, disabling loop unroll would not run the LoopUnroll pass. After this patch, the LoopUnroll pass is being run, but it restricts unrolling to only the loops marked by a pragma (`OnlyWhenForced = true`).
> In addition, this patch disables the UnrollAndJam pass when disabling unrolling."
>
> Otherwise LGTM.
>
>
> Repository:
>   rG LLVM Github Monorepo
>
> CHANGES SINCE LAST ACTION
>   https://reviews.llvm.org/D68535/new/
>
> https://reviews.llvm.org/D68535
>
>
>