<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br><div><div>On Nov 12, 2013, at 6:26 PM, Sean Silva <<a href="mailto:silvas@purdue.edu">silvas@purdue.edu</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr">Out of curiousity, what was the motivation for this? It seems to add a lot of (honestly pretty unmaintable) complexity, and isn't this output meant to be fed to another tool.</div></blockquote><div><br></div><div>We have about as different an idea of unmaintainable as I could imagine. This is a trivial bit of code completely confined to a single loop that hasn’t been touched since Chris wrote it in 2003.</div><div><br></div><div>If you’ll notice the existing comment on the loop is “Process string output to make it nicer…”</div><div><br></div><div><div>Very long lines make it impossible for GraphViz to layout the graph such the the CFG structure is evident. That’s definitely not nice. I don’t like the DOT language or the tool, but I need to make it work for our purpose. I’d be happy with any alternate implementation that you provide.</div></div><div><br></div><div>-Andy</div><div><br></div><blockquote type="cite"><div class="gmail_extra"><div class="gmail_quote">On Tue, Nov 12, 2013 at 1:06 PM, Andrew Trick <span dir="ltr"><<a href="mailto:atrick@apple.com" target="_blank">atrick@apple.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; position: static; z-index: auto;">Author: atrick<br>
Date: Tue Nov 12 12:06:09 2013<br>
New Revision: 194496<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=194496&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=194496&view=rev</a><br>
Log:<br>
GraphViz CFGPrinter: wrap long lines.<br>
<br>
Modified:<br>
llvm/trunk/include/llvm/Analysis/CFGPrinter.h<br>
<br>
Modified: llvm/trunk/include/llvm/Analysis/CFGPrinter.h<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/CFGPrinter.h?rev=194496&r1=194495&r2=194496&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/CFGPrinter.h?rev=194496&r1=194495&r2=194496&view=diff</a><br>
==============================================================================<br>
--- llvm/trunk/include/llvm/Analysis/CFGPrinter.h (original)<br>
+++ llvm/trunk/include/llvm/Analysis/CFGPrinter.h Tue Nov 12 12:06:09 2013<br>
@@ -46,6 +46,7 @@ struct DOTGraphTraits<const Function*> :<br>
<br>
static std::string getCompleteNodeLabel(const BasicBlock *Node,<br>
const Function *) {<br>
+ enum { MaxColumns = 80 };<br>
std::string Str;<br>
raw_string_ostream OS(Str);<br>
<br>
@@ -59,16 +60,32 @@ struct DOTGraphTraits<const Function*> :<br>
if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());<br>
<br>
// Process string output to make it nicer...<br>
- for (unsigned i = 0; i != OutStr.length(); ++i)<br>
+ unsigned ColNum = 0;<br>
+ unsigned LastSpace = 0;<br>
+ for (unsigned i = 0; i != OutStr.length(); ++i) {<br>
if (OutStr[i] == '\n') { // Left justify<br>
OutStr[i] = '\\';<br>
OutStr.insert(OutStr.begin()+i+1, 'l');<br>
+ ColNum = 0;<br>
+ LastSpace = 0;<br>
} else if (OutStr[i] == ';') { // Delete comments!<br>
unsigned Idx = OutStr.find('\n', i+1); // Find end of line<br>
OutStr.erase(OutStr.begin()+i, OutStr.begin()+Idx);<br>
--i;<br>
+ } else if (ColNum == MaxColumns) { // Wrap lines.<br>
+ if (LastSpace) {<br>
+ OutStr.insert(LastSpace, "<a href="smb://l">\\l</a>...");<br>
+ ColNum = i - LastSpace;<br>
+ LastSpace = 0;<br>
+ i += 3; // The loop will advance 'i' again.<br>
+ }<br>
+ // Else keep trying to find a space.<br>
}<br>
-<br>
+ else<br>
+ ++ColNum;<br>
+ if (OutStr[i] == ' ')<br>
+ LastSpace = i;<br>
+ }<br>
return OutStr;<br>
}<br>
<br>
<br>
<br>
_______________________________________________<br>
llvm-commits mailing list<br>
<a href="mailto:llvm-commits@cs.uiuc.edu">llvm-commits@cs.uiuc.edu</a><br>
<a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits" target="_blank">http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits</a><br>
</blockquote></div><br></div>
</blockquote></div><br></body></html>