[LLVMdev] Decouple LoopVectorizer from O3

[Anadi Mishra]

Thanks for the suggestion Jim. I already tried to do it by 'opt' but it
also requires O3. BTW I think that if I invoke 'opt' with
'-vectorize-loops' option, it will figure out the passes required for LV
since every pass mentions what other passes are prerequisite. Am I correct?


Best,
Anadi.


On Thu, Apr 11, 2013 at 2:48 AM, Jim Grosbach <grosbach at apple.com> wrote:

> You can take unoptimized bitcode and run it through ‘opt’ to have complete
> flexibility in which passes get run. It may take some fiddling to find out
> the pass sequence and ordering that does what you want, as some passes rely
> on previous passes to canonicaplize code into a form it can effectively
> work with.
>
> -Jim
>
>
> On Apr 10, 2013, at 5:39 PM, Anadi Mishra <reachanadi at gmail.com> wrote:
>
> Hello,
>
> I am trying out the LoopVectorizer(LV) pass and would like to decouple it
> from O3 which is currently required to run LV. I want to do this because I
> want to understand the behaviour of LV by trying simple loops but the O3
> mostly optimises away the loop body.
>
> Any ideas would be appreciated.
>
> Best,
> Anadi.
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130411/3277c1c9/attachment.html>