<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000'><br><hr id="zwchr"><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px; color: rgb(0, 0, 0); font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"Daniel Berlin via llvm-dev" <llvm-dev@lists.llvm.org><br><b>To: </b>"Renato Golin" <renato.golin@linaro.org>, "George Burgess IV" <george.burgess.iv@gmail.com><br><b>Cc: </b>"llvm-dev" <llvm-dev@lists.llvm.org>, "Jia Chen" <jchen@cs.utexas.edu><br><b>Sent: </b>Monday, March 21, 2016 2:07:44 PM<br><b>Subject: </b>Re: [llvm-dev] Existing studies on the benefits of pointer analysis<br><br><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Mar 21, 2016 at 12:05 PM, Renato Golin <span dir="ltr"><<a href="mailto:renato.golin@linaro.org" target="_blank">renato.golin@linaro.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><span class="">On 21 March 2016 at 18:59, Daniel Berlin <<a href="mailto:dberlin@dberlin.org" target="_blank">dberlin@dberlin.org</a>> wrote:<br>
> Which is why i've never mentioned it or used it in the community ;)<br>
<br>
</span>Makes sense. :)<br>
<span class=""><br>
<br>
> I would rather see someone spend their time getting SCEV-AA on by default or<br>
> CFL-AA on by default than doing another evaluation.<br>
<br>
</span>But those may not be simple enough for a GSOC, that's why I mentioned it.<br>
<br></blockquote><div><br></div><div id="DWT4519">CFL-AA should just be fixing performance regressions, and maybe a little bug fixing, which is hopefully easy enough. It's already fast enough as a pass.</div></div></div></div></blockquote><br>My understanding from George is that there are self-hosting miscompiles if you disable all AA except for CFL-AA. This is what is preventing us from enabling it by default. George, is that right?<br><br> -Hal<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px; color: rgb(0, 0, 0); font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div></div><div><br></div><div>SCEV-AA would be harder (must make SCEV-AA faster).</div><div><br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
The analysis could not only get us a birds view of the problem ahead,<br>
but also introduce new developers to AA, which would make their future<br>
work on SCEV-AA or CFL-AA easier. Kind of a teaching tool to get more<br>
AA-savvy people.<br></blockquote><div><br></div><div>Sure. </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<br>
cheers,<br>
--renato<br>
</blockquote></div><br></div></div>
<br>_______________________________________________<br>LLVM Developers mailing list<br>llvm-dev@lists.llvm.org<br>http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev<br></blockquote><br><br><br>-- <br><div><span name="x"></span>Hal Finkel<br>Assistant Computational Scientist<br>Leadership Computing Facility<br>Argonne National Laboratory<span name="x"></span><br></div></div></body></html>