<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Nov 2, 2015, at 11:19 AM, Hal Finkel 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=""><span style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">----- Original Message -----</span><br style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">From: "Matthias Braun via llvm-dev" <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>><br class="">To: "Daniel Berlin" <<a href="mailto:dberlin@dberlin.org" class="">dberlin@dberlin.org</a>><br class="">Cc: "llvm-dev" <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>><br class="">Sent: Monday, November 2, 2015 1:16:18 PM<br class="">Subject: Re: [llvm-dev] Prefixing DEBUG messages with DEBUG_TYPE (was re: [PATCH] D13259: LLE 6/6: Add<br class="">LoopLoadElimination pass)<br class=""><br class="">To ask a basic question first: Why do we need prefixes at all? Are<br class="">the messages that likely to be confused? As far as I understand this<br class="">case it was only mentioned because of inconsistent prefix/no-prefix<br class="">use, there was no indication that we should actually have them. So<br class="">another possible solution would be to remove prefixes and avoiding<br class="">the additional visual noise. Why add noise to every message just to<br class="">improve upon the rare case of a messages origin being ambiguous?<br class=""></blockquote><br style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">I generally find the prefixes convenient when searching the debug output for debug messages from a particular pass.</span><br style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""></div></blockquote><div><br class=""></div><div>+1</div><br class=""><blockquote type="cite" class=""><div class=""><br style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">-Hal</span><br style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><blockquote type="cite" style="font-family: Helvetica; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><br class="">- Matthias<br class=""><br class=""><blockquote type="cite" class="">On Nov 2, 2015, at 11:04 AM, Daniel Berlin via llvm-dev<br class=""><<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:<br class=""><br class="">Moving this discussion here from the review thread.<br class=""><br class="">RIght now, we have a few passes that prefix DEBUG message with<br class="">various things, so folks using -debug can tell where the debug<br class="">message came from.<br class=""><br class="">But this is not consistent, and in fact, most passes don't do it.<br class=""><br class="">Worse, the prefixes used do not often match the DEBUG_TYPE of the<br class="">pass.<br class=""><br class="">It would be nice to fix this, and just have the DEBUG macros output<br class="">the debug type in front of messages if that's what folks want.<br class=""><br class="">Of course, it turns out you can't just make the DEBUG macro do<br class="">something here, because people use it for more than just<br class="">outputting messages.<br class=""><br class="">My thought was to just bite the bullet and make a DEBUG_MSG macro<br class="">that outputs the DEBUG_TYPE, and replace the appropriate existing<br class="">uses of DEBUG(dbgs() <<) with it.<br class=""><br class="">Something like<br class="">#define DEBUG_MSG_WITH_TYPE(t, x) DEBUG_WITH_TYPE(t, dbgs() << t<br class=""><<":" << x;)<br class="">#define DEBUG_MSG(x) DEBUG_MSG_WITH_TYPE(DEBUG_TYPE, x)<br class=""><br class="">Suggestions, however, welcome!<br class=""><br class="">---------- Forwarded message ----------<br class="">From: Renato Golin <<a href="mailto:renato.golin@linaro.org" class="">renato.golin@linaro.org</a>><br class="">Date: Fri, Oct 30, 2015 at 10:15 AM<br class="">Subject: Re: [PATCH] D13259: LLE 6/6: Add LoopLoadElimination pass<br class="">To: <a href="mailto:anemet@apple.com" class="">anemet@apple.com</a>, <a href="mailto:hfinkel@anl.gov" class="">hfinkel@anl.gov</a>, <a href="mailto:dberlin@dberlin.org" class="">dberlin@dberlin.org</a><br class="">Cc: <a href="mailto:mssimpso@codeaurora.org" class="">mssimpso@codeaurora.org</a>, <a href="mailto:sanjoy@playingwithpointers.com" class="">sanjoy@playingwithpointers.com</a>,<br class=""><a href="mailto:llvm-commits@lists.llvm.org" class="">llvm-commits@lists.llvm.org</a><br class=""><br class=""><br class="">rengolin added a comment.<br class=""><br class="">In http://reviews.llvm.org/D13259#278362, @dberlin wrote:<br class=""><br class=""><blockquote type="cite" class="">I would suggest rather than prefix *anything*, anywhere, that if<br class="">we want<br class="">prefixes, we just have the DEBUG macro output the debug type in<br class="">front of<br class="">the message ;-)<br class=""></blockquote><br class=""><br class="">Sounds good to me.<br class=""><br class=""><br class="">http://reviews.llvm.org/D13259<br class="">_______________________________________________<br class="">LLVM Developers mailing list<br class="">llvm-dev@lists.llvm.org<br class="">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev<br class=""></blockquote><br class="">_______________________________________________<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="">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev<br class=""><br class=""></blockquote><br style="font-family: Helvetica; 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