<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Before, r220345 we had <div class=""><br class=""></div><div class=""> PM.add(createLoopVectorizePass(true, true);</div><div class=""><br class=""></div><div class="">loop unrolling was disable in the LTO vectorizer pass.</div><div class=""><br class=""></div><div class="">I did not want to add yet another flag to the LTO pipeline.</div><div class=""><br class=""></div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Oct 26, 2014, at 10:35 PM, Chandler Carruth <<a href="mailto:chandlerc@google.com" class="">chandlerc@google.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="gmail_extra"><br class=""><div class="gmail_quote">On Sun, Oct 26, 2014 at 7:05 PM, Rafael Espíndola <span dir="ltr" class=""><<a href="mailto:rafael.espindola@gmail.com" target="_blank" class="">rafael.espindola@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">> --- llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp (original)<br class="">
> +++ llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp Sun Oct 26 16:50:58 2014<br class="">
> @@ -444,7 +444,7 @@ void PassManagerBuilder::addLTOOptimizat<br class="">
> // More loops are countable; try to optimize them.<br class="">
> PM.add(createIndVarSimplifyPass());<br class="">
> PM.add(createLoopDeletionPass());<br class="">
> - PM.add(createLoopVectorizePass(DisableUnrollLoops, LoopVectorize));<br class="">
> + PM.add(createLoopVectorizePass(true, LoopVectorize));<br class="">
><br class="">
<br class="">
</span>Was it intentional to always disable loop unrolling?</blockquote></div><br class="">I would suggest it was an accident. =]</div></div>
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