llvm dev - Jun 2017 - Just a quick heads up -- removing BBVectorize from LLVM (and Clang)

If you don't use BBVectorize at all, you can ignore this.

Hal suggested this in a thread in 2014:
http://lists.llvm.org/pipermail/llvm-dev/2014-November/079091.html

None objected then, and I don't think any new uses have arisen so I plan to
just remove it. It is causing maintenance burden, complexity, and is a set
of features I'd rather not port to the new PM.

Just an FYI email to folks so they aren't confused when the patches land.
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On 06/29/2017 05:42 PM, Chandler Carruth wrote:
> If you don't use BBVectorize at all, you can ignore this.
>
> Hal suggested this in a thread in 2014:
> http://lists.llvm.org/pipermail/llvm-dev/2014-November/079091.html
>
> None objected then, and I don't think any new uses have arisen so I 
> plan to just remove it. It is causing maintenance burden, complexity, 
> and is a set of features I'd rather not port to the new PM.
Thanks, Chandler. Indeed, I've not seen any "-fslp-vectorize-aggressive
makes my code faster" reports in a long time.

  -Hal
>
> Just an FYI email to folks so they aren't confused when the patches
land.
-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory

On Thu, Jun 29, 2017 at 3:42 PM, Chandler Carruth via cfe-dev
<cfe-dev at lists.llvm.org> wrote:
> If you don't use BBVectorize at all, you can ignore this.
>
> Hal suggested this in a thread in 2014:
> http://lists.llvm.org/pipermail/llvm-dev/2014-November/079091.html
>
> None objected then, and I don't think any new uses have arisen so I
plan to
> just remove it. It is causing maintenance burden, complexity, and is a set
> of features I'd rather not port to the new PM.
>
> Just an FYI email to folks so they aren't confused when the patches
land.
Maybe worth mentioning in the release notes?

Already added in the commit (I think)

On Fri, Jun 30, 2017 at 3:58 PM Hans Wennborg <hans at chromium.org>
wrote:
> On Thu, Jun 29, 2017 at 3:42 PM, Chandler Carruth via cfe-dev
> <cfe-dev at lists.llvm.org> wrote:
> > If you don't use BBVectorize at all, you can ignore this.
> >
> > Hal suggested this in a thread in 2014:
> > http://lists.llvm.org/pipermail/llvm-dev/2014-November/079091.html
> >
> > None objected then, and I don't think any new uses have arisen so
I plan
> to
> > just remove it. It is causing maintenance burden, complexity, and is a
> set
> > of features I'd rather not port to the new PM.
> >
> > Just an FYI email to folks so they aren't confused when the
patches land.
>
> Maybe worth mentioning in the release notes?
>
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