[LLVMdev] RFC: Should we have (something like) -extra-vectorizer-passes in -O2?

Hal Finkel hfinkel at anl.gov
Thu Oct 16 11:38:07 PDT 2014

----- Original Message -----
> From: "Chandler Carruth" <chandlerc at google.com>
> To: "Zinovy Nis" <zinovy.nis at gmail.com>
> Cc: "Hal Finkel" <hfinkel at anl.gov>, "James Molloy" <james at jamesmolloy.co.uk>, "LLVM Developers Mailing List"
> <llvmdev at cs.uiuc.edu>
> Sent: Thursday, October 16, 2014 1:21:19 PM
> Subject: Re: [LLVMdev] RFC: Should we have (something like) -extra-vectorizer-passes in -O2?
> On Thu, Oct 16, 2014 at 7:55 AM, Zinovy Nis < zinovy.nis at gmail.com >
> wrote:
> Seems that adding -extra-vectorizer-passes doesn't help to vectorizer
> in my case. LoopRotation re-run does nothing.
> Can you reduce this to a test case you can share?

He had posted one earlier here:
(Arnold had posted some analysis here: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20141006/239144.html - which I imagine you saw)


Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory

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