
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">The Loop Optimization Working Group had a survey about “canonical” loop required by each loop transformation or analysis. That is, what should we normalize a loop before running a certain loop pass.<div class=""><br class=""></div><div class="">Here is the survey result: <font color="#419cff" class=""><span style="caret-color: rgb(65, 156, 255);" class=""><u class=""><a href="https://tinyurl.com/rhuzny2" class="">https://tinyurl.com/rhuzny2</a></u></span></font></div><div class="">(Note that there are two workspaces: “By precondition” and “Breakdown”)</div><div class=""><br class=""></div><div class="">Best</div><div class="">- Min<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Dec 22, 2019, at 2:40 AM, Shraiysh Vaishay via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><font face="monospace" class="">Hi all,</font><div class=""><font face="monospace" class=""><br class=""></font></div><div class=""><font face="monospace" class="">Just putting this here in case someone else stumbles upon this.</font></div><div class=""><font face="monospace" class=""><br class=""></font></div><div class=""><font face="monospace" class="">So, it looks like it is important to rotate the loop for the pass to run properly. Running `-passes="function(mem2reg,loop(rotate))"` started displaying proper analysis.</font></div></div><font face="monospace" class="">A related issue was mentioned earlier [here](<a href="https://lists.llvm.org/pipermail/llvm-dev/2013-May/062260.html" class="">https://lists.llvm.org/pipermail/llvm-dev/2013-May/062260.html</a>)<br class=""></font><div dir="ltr" class=""><div class=""><div class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><font face="monospace" class=""><br class=""></font></div><div class=""><font face="monospace" class="">Regards,</font></div><div dir="ltr" class=""><font face="monospace" class="">Shraiysh</font></div></div></div></div></div></div></div></div></div></div><font face="monospace" class=""><br class=""></font></div></div><font face="monospace" class=""><br class=""></font><div class="gmail_quote"><div dir="ltr" class="gmail_attr"><font face="monospace" class="">On Sat, Dec 21, 2019 at 3:33 PM Shraiysh Vaishay <<a href="mailto:cs17btech11050@iith.ac.in" class="">cs17btech11050@iith.ac.in</a>> wrote:<br class=""></font></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr" class=""><font face="monospace" class="">Hi all,</font><div class=""><font face="monospace" class=""><br class=""></font></div><div class=""><font face="monospace" class="">What kind of input loop is expected for the loop-access pass to run smoothly?</font></div><div class=""><font face="monospace" class="">Also, what passes (like mem2reg) should be run to ensure the desired form is attained. Is running mem2reg, indvars and loop-simplify enough for that?</font></div><div class=""><font face="monospace" class=""><br class=""></font></div><div class=""><font face="monospace" class="">Any help will be appreciated.</font></div><div class=""><font face="monospace" class=""><br clear="all" class=""></font><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><font face="monospace" class="">Thanks and regards,</font></div><div dir="ltr" class=""><font face="monospace" class="">Shraiysh</font></div></div></div></div></div></div></div></div></div></div></div></div>

</blockquote></div></div>

_______________________________________________<br class="">LLVM Developers mailing list<br class=""><a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a><br class="">https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev<br class=""></div></blockquote></div><br class=""></div></body></html>