<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:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" 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><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Victor,<o:p></o:p></span></p><p class=MsoNormal><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:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>one restriction of “2.13.9 depend Clause” says:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>“List items used in depend clauses of the same task or sibling tasks must indicate identical storage locations or disjoint storage locations.”<o:p></o:p></span></p><p class=MsoNormal><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:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I think this means that array sections in the depend clauses must not overlap unless they are completely the same. So it is an optimization to only compare the base address because if the lengths don’t match, the program is non-conforming anyway.<o:p></o:p></span></p><p class=MsoNormal><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:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Cheers,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jonas<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Openmp-dev [mailto:openmp-dev-bounces@lists.llvm.org] <b>On Behalf Of </b>Victor Campos via Openmp-dev<br><b>Sent:</b> Tuesday, November 08, 2016 1:46 AM<br><b>To:</b> openmp-dev@lists.llvm.org<br><b>Subject:</b> [Openmp-dev] Dependency length in taskdeps<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Hi,<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>I have a question about dependency tracking in kmp_taskdeps.cpp.<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>I see that dependency edges are created between nodes based on the base address (base_addr) of the dependency. However, I don't see the length (len) being taken into consideration to determine node connections.<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>Am I missing something or is this a feature not yet implemented?<o:p></o:p></p></div><p class=MsoNormal>Regards,<o:p></o:p></p></div><p class=MsoNormal>Victor.<o:p></o:p></p></div></div></div></body></html>