<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.hoenzb
{mso-style-name:hoenzb;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Verdana","sans-serif";
color:#1F497D;
font-weight:normal;
font-style:normal;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-GB" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">(If we showed the real internal transformation you would need to understand the compiler IR, which isn’t the point of the discussion.)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">If you want an OpenMP implementation that does operate source to source, you might look at Rose.
<a href="http://rosecompiler.org/">http://rosecompiler.org/</a> (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…<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">-- Jim<br>
<br>
James Cownie <james.h.cownie@intel.com><br>
SSG/DPD/TCAR (Technical Computing, Analyzers and Runtimes)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D">Tel: +44 117 9071438</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> openmp-dev-bounces@cs.uiuc.edu [mailto:openmp-dev-bounces@cs.uiuc.edu]
<b>On Behalf Of </b>Alexander Musman<br>
<b>Sent:</b> Thursday, September 18, 2014 4:07 AM<br>
<b>To:</b> daniel tian<br>
<b>Cc:</b> openmp-dev@dcs-maillist2.engr.illinois.edu; HPCTools Group<br>
<b>Subject:</b> Re: [Openmp-dev] #pragma directives expansion<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">You can also have a look at <a href="http://openmp.llvm.org/Reference.pdf">
http://openmp.llvm.org/Reference.pdf</a> - it contains several examples of how different OpenMP directives are expanded.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">2014-09-17 22:47 GMT+04:00 daniel tian <<a href="mailto:xtian2@uh.edu" target="_blank">xtian2@uh.edu</a>>:<o:p></o:p></p>
<div>
<p class="MsoNormal">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. <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Also you can take a look at Liao's paper: <a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.190.7005" target="_blank"><em><span style="font-family:"Arial","sans-serif"">OpenUH</span></em><span style="font-family:"Arial","sans-serif"">:
An optimizing, portable <em><span style="font-family:"Arial","sans-serif"">OpenMP</span></em> compiler</span></a><o:p></o:p></p>
</div>
</div>
<div>
<div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Wed, Sep 17, 2014 at 1:15 PM, Millad Ghane <<a href="mailto:millad.mg@gmail.com" target="_blank">millad.mg@gmail.com</a>> wrote:<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Hello everyone, <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">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? <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">For example, considering this piece of code:<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New"">#pragma omp parallel</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New"">{</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New""> printf("Hello world! %d", omp_get_thread_num());</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New"">}</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">will be converted to something like this:<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New"">f1();</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New"">{</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New""> printf("Hello world! %d", omp_get_thread_num());</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New"">}</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Courier New"">f2();</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">If I am wrong tell me.And if you know where should I look for in the code, let me know about it.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Best Regards,<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Millad<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
</div>
</div>
</div>
<p class="MsoNormal"><br>
<br clear="all">
<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</div>
<p class="MsoNormal"><span class="hoenzb"><span style="color:#888888">-- <o:p></o:p></span></span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#888888">Best Regards,</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#888888">Xiaonan (Daniel) Tian</span><span style="color:#888888"><o:p></o:p></span></p>
</div>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
_______________________________________________<br>
Openmp-dev mailing list<br>
<a href="mailto:Openmp-dev@dcs-maillist2.engr.illinois.edu">Openmp-dev@dcs-maillist2.engr.illinois.edu</a><br>
<a href="http://lists.cs.uiuc.edu/mailman/listinfo/openmp-dev" target="_blank">http://lists.cs.uiuc.edu/mailman/listinfo/openmp-dev</a><o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<p>---------------------------------------------------------------------<br>
Intel Corporation (UK) Limited<br>
Registered No. 1134945 (England)<br>
Registered Office: Pipers Way, Swindon SN3 1RJ<br>
VAT No: 860 2173 47</p>
<p>This e-mail and any attachments may contain confidential material for<br>
the sole use of the intended recipient(s). Any review or distribution<br>
by others is strictly prohibited. If you are not the intended<br>
recipient, please contact the sender and delete all copies.</p></body>
</html>