[Openmp-dev] #pragma directives expansion

[Barbara Chapman]

BTW the Rose implementation was based on our OpenUH one and done by 
somebody from the UH group. So we have plenty of documentation on that :-)
Barbara

On 9/18/14 4:03 AM, Cownie, James H wrote:
>
> You need to be clear, though, that the expansions are conceptual and 
> for educational purposes. They’re showing what the transformations 
> would look like if they were done in source code. However that doesn’t 
> meant that is how they are done, in reality they’re transformations on 
> the compiler’s intermediate representation. When compiling there is 
> never a file that contains the transformed source code.
>
> They’re shown in the document as if they were source code 
> transformations because that’s easy to read and understand, not 
> because that’s what really exists.
>
> (If we showed the real internal transformation you would need to 
> understand the compiler IR, which isn’t the point of the discussion.)
>
> If you want an OpenMP implementation that does operate source to 
> source, you might look at Rose. http://rosecompiler.org/ (Disclaimer, 
> I haven’t looked at it in detail, but it seems to claim to have an 
> OpenMP implementation). I doubt that it targets this runtime, though…
>
> -- Jim
>
> James Cownie <james.h.cownie at intel.com>
> SSG/DPD/TCAR (Technical Computing, Analyzers and Runtimes)
>
> Tel: +44 117 9071438
>
> *From:*openmp-dev-bounces at cs.uiuc.edu 
> [mailto:openmp-dev-bounces at cs.uiuc.edu] *On Behalf Of *Alexander Musman
> *Sent:* Thursday, September 18, 2014 4:07 AM
> *To:* daniel tian
> *Cc:* openmp-dev at dcs-maillist2.engr.illinois.edu; HPCTools Group
> *Subject:* Re: [Openmp-dev] #pragma directives expansion
>
> You can also have a look at http://openmp.llvm.org/Reference.pdf 
> <http://openmp.llvm.org/Reference.pdf> - it contains several examples 
> of how different OpenMP directives are expanded.
>
> 2014-09-17 22:47 GMT+04:00 daniel tian <xtian2 at uh.edu 
> <mailto:xtian2 at uh.edu>>:
>
> The parallel region will be outlined as a function. This function will 
> be run by each threads. You can take a look at our group's Wikipedia 
> page regarding the OpenMP implementation in OpenUH.
>
> Also you can take a look at Liao's paper: /OpenUH/: An optimizing, 
> portable /OpenMP/ compiler 
> <http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.190.7005>
>
> On Wed, Sep 17, 2014 at 1:15 PM, Millad Ghane <millad.mg at gmail.com 
> <mailto:millad.mg at gmail.com>> wrote:
>
> Hello everyone,
>
> I know that an OpenMP #pragma directive is expanded into some lines of 
> codes (or maybe I am wrong). I was hoping if someone could tell me 
> where should I look for it?
>
> For example, considering this piece of code:
>
> #pragma omp parallel
>
> {
>
> printf("Hello world! %d", omp_get_thread_num());
>
> }
>
> will be converted to something like this:
>
> f1();
>
> {
>
> printf("Hello world! %d", omp_get_thread_num());
>
> }
>
> f2();
>
> If I am wrong tell me.And if you know where should I look for in the 
> code, let me know about it.
>
> Best Regards,
>
> Millad
>
>
>
> -- 
>
> Best Regards,
>
> Xiaonan (Daniel) Tian
>
>
> _______________________________________________
> Openmp-dev mailing list
> Openmp-dev at dcs-maillist2.engr.illinois.edu 
> <mailto:Openmp-dev at dcs-maillist2.engr.illinois.edu>
> http://lists.cs.uiuc.edu/mailman/listinfo/openmp-dev
>
> ---------------------------------------------------------------------
> Intel Corporation (UK) Limited
> Registered No. 1134945 (England)
> Registered Office: Pipers Way, Swindon SN3 1RJ
> VAT No: 860 2173 47
>
> This e-mail and any attachments may contain confidential material for
> the sole use of the intended recipient(s). Any review or distribution
> by others is strictly prohibited. If you are not the intended
> recipient, please contact the sender and delete all copies.
>


-- 

Barbara Chapman, Professor and Director
Center for Advanced Computing & Data Systems
University of Houston
A Carnegie-designated Tier One public research University
713-743-3354 office
chapman at cs.uh.edu

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/openmp-dev/attachments/20140918/98fec495/attachment.html>