<div dir="ltr"><br><br><div class="gmail_quote"><div dir="ltr">On Wed, Nov 18, 2015 at 10:42 AM Robinson, Paul <<a href="mailto:Paul_Robinson@playstation.sony.com">Paul_Robinson@playstation.sony.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The driving goal of 'optnone' is to have an easy way for programmers to get an "-O0 like" debugging experience for selected functions, without making them build
everything with –O0.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">To that end, we turn off as much optimization as we reasonably can, but in the context of a pipeline that is generally expecting optimizations to be enabled,
in practice we can't exactly match –O0 because "things break" if we turn off everything. Luckily, exactly matching –O0 isn't a requirement.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Contemplating the "things break" situation, I am entirely willing to believe (it may have actually happened) that problems can occur when using FastISel in
a pipeline that isn't expecting it. So, for purposes of diagnosing these 'optnone' problems, it seems useful to be able to force 'optnone' not to use FastISel. This is a different motivation than Daniel expressed, which is a more principled idea coming from
the "optnone should exactly match –O0" misconception; but the conclusion (that we should respect an explicit –fast-isel=false within 'optnone' functions) is the same.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"></span></p></div></div></blockquote><div>Works for me, should probably document it under some documentation for the function attribute.</div><div><br></div><div>Thanks!</div><div><br></div><div>-eric</div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">--paulr<u></u><u></u></span></p>
<p class="MsoNormal"><a name="msg-f:1518203962886675756__MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></a></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Eric Christopher [mailto:<a href="mailto:echristo@gmail.com" target="_blank">echristo@gmail.com</a>]
<br>
<b>Sent:</b> Wednesday, November 18, 2015 9:48 AM<br>
<b>To:</b> Robinson, Paul; Daniel Sanders; <a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a><br>
<b>Subject:</b> Re: [llvm-dev] Mips unconditionally uses fast-isel?<u></u><u></u></span></p>
</div>
</div></div></div></div><div lang="EN-US" link="blue" vlink="purple"><div><div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">I'd have figured optnone was "no optimizations" not "use the entire O0 code path"?<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">At least that seemed to be the intent when you added it Paul?<u></u><u></u></p>
</div>
<div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">-eric<u></u><u></u></p>
</div>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal">On Wed, Nov 18, 2015 at 8:05 AM Robinson, Paul via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>> wrote:<u></u><u></u></p>
</div>
<blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal"><span style="color:#1f497d">Well, 'optnone' is already not identical to –O0, and given the nature of things, probably can't be; but I am persuaded that it's reasonable for it to
honor the –fast-isel option as a debugging tactic. I'll take an AI to make this happen.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:#1f497d">Thanks,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:#1f497d">--paulr</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:#1f497d">P.S. One nit, the "O0 + optnone" case should not have an asterisk, the FastISel flag is not manipulated if the opt level is already zero. Does not affect
the strength of your argument, of course.</span><u></u><u></u></p>
<p class="MsoNormal"><a name="msg-f:1518203962886675756_msg-f:1518194089395188083__MailEndCompos"><span style="color:#1f497d"> </span></a><u></u><u></u></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Daniel Sanders [mailto:<a href="mailto:Daniel.Sanders@imgtec.com" target="_blank">Daniel.Sanders@imgtec.com</a>]
<br>
<b>Sent:</b> Wednesday, November 18, 2015 2:19 AM<br>
<b>To:</b> Robinson, Paul; <a href="mailto:llvm-dev@lists.llvm.org" target="_blank">
llvm-dev@lists.llvm.org</a></span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<div>
<div>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><br>
<b>Subject:</b> RE: Mips unconditionally uses fast-isel?</span><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
<div>
<div>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<p class="MsoNormal"> <u></u><u></u></p>
<p><span lang="EN-GB">> </span>-----Original Message-----<u></u><u></u></p>
<p><span lang="EN-GB">> </span>From: Robinson, Paul [<a href="mailto:Paul_Robinson@playstation.sony.com" target="_blank">mailto:Paul_Robinson@playstation.sony.com</a>]<u></u><u></u></p>
<p><span lang="EN-GB">> </span>Sent: 17 November 2015 22:58<u></u><u></u></p>
<p><span lang="EN-GB">> </span>To: Daniel Sanders; <a href="mailto:llvm-dev@lists.llvm.org" target="_blank">
llvm-dev@lists.llvm.org</a><u></u><u></u></p>
<p><span lang="EN-GB">> </span>Subject: RE: Mips unconditionally uses fast-isel?<u></u><u></u></p>
<p><span lang="EN-GB">> </span><u></u><u></u></p>
<p><span lang="EN-GB">> > > The other thing that might work, is having TargetMachine remember how</span><u></u><u></u></p>
<p><span lang="EN-GB">> > > the fast-isel option got set, and make OptLevelChanger do the right</span><u></u><u></u></p>
<p><span lang="EN-GB">> > > thing. But that seems like a hack to work around Mips not obeying the</span><u></u><u></u></p>
<p><span lang="EN-GB">> > > specified optimization level, honestly.</span><u></u><u></u></p>
<p><span lang="EN-GB">> ></span><u></u><u></u></p>
<p><span lang="EN-GB">> > I think we should do that as well. I don't think it's right that optnone</span><u></u><u></u></p>
<p><span lang="EN-GB">> > enables Fast ISel even when it's been explicitly disabled. It should do</span><u></u><u></u></p>
<p><span lang="EN-GB">> > the same checks as addPassesToGenerateCode() does.</span><u></u><u></u></p>
<p><span lang="EN-GB">> </span><u></u><u></u></p>
<p><span lang="EN-GB">> Hm? What you're asking for is that "-O2" and "-O2 -fast-isel=none" are</span><u></u><u></u></p>
<p><span lang="EN-GB">> identical, unless you have an 'optnone' function. Do you really have a</span><u></u><u></u></p>
<p><span lang="EN-GB">> use-case for controlling the codegen path for an 'optnone' function?</span><u></u><u></u></p>
<p><span lang="EN-GB">> The whole point of 'optnone' is to avoid optimizations.</span><u></u><u></u></p>
<p><span lang="EN-GB">> --paulr</span><u></u><u></u></p>
<p><span lang="EN-GB">> </span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black"> </span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">No, that's already true. -O2 doesn't try to enable Fast ISel (unless the optnone attribute is given) so –fast-isel=false has no effect.</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black"> </span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">I'm saying that optnone means 'use –O0 for this function' and that optnone should</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">respect non-default values of the -fast-isel flag like –O0 does. This is the behaviour I'd expect:</span><u></u><u></u></p>
<table border="0" cellspacing="0" cellpadding="0" style="border-collapse:collapse">
<tbody>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black"> </span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border:solid windowtext 1.0pt;border-left:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-fast-isel=false</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border:solid windowtext 1.0pt;border-left:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-fast-isel=default</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border:solid windowtext 1.0pt;border-left:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-fast-isel=true</span><u></u><u></u></p>
</td>
</tr>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;border-top:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-O0</span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
</tr>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;border-top:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-O0 + optnone attribute</span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG*</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
</tr>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;border-top:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-O1 + optnone attribute</span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG*</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
</tr>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;border-top:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-O2 + optnone attribute</span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG*</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
</tr>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;border-top:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-O3 + optnone attribute</span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG*</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
</tr>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;border-top:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-O1</span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
</tr>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;border-top:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-O2</span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
</tr>
<tr>
<td width="201" valign="top" style="width:120.5pt;border:solid windowtext 1.0pt;border-top:none;background:#d9d9d9;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">-O3</span><u></u><u></u></p>
</td>
<td width="164" valign="top" style="width:98.55pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG</span><u></u><u></u></p>
</td>
<td width="153" valign="top" style="width:91.8pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">SelectionDAG</span><u></u><u></u></p>
</td>
<td width="151" valign="top" style="width:90.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p><span style="color:black">FastISel</span><u></u><u></u></p>
</td>
</tr>
</tbody>
</table>
<p><span lang="EN-GB" style="color:black">The cells marked with '*' differ from the current behaviour.</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> </span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">In terms of code, I think this part of OptLevelChanger::OptLevelChanger():</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> if (NewOptLevel == CodeGenOpt::None) {</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> DEBUG(dbgs() << "\nEnable FastISel for Function "</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> << IS.MF->getFunction()->getName() << "\n");</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> IS.TM.setFastISel(true);</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> }</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">Should be:</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> if (NewOptLevel == CodeGenOpt::None) {</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> DEBUG(dbgs() << "\nEnable FastISel for Function "</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> << IS.MF->getFunction()->getName() << "\n");</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> IS.TM.setFastISel(EnableFastISelOption != cl::BOU_FALSE);</span><u></u><u></u></p>
<p><span lang="EN-GB" style="font-family:"Courier New";color:black"> }</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">Where EnableFastISelOption has the same value as the global in LLVMTargetMachine.cpp</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black"> </span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">The main reason I'm asking for this is that I think it's weird to for optnone to use a different code generator</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">than –O0. These hidden overrides exist to help us debug code generation problems and, faced with a code</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">generation bug, –fast-isel=false is useful for quickly determining whether it's in FastISel or somewhere else.</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">The current behaviour allows optnone to overrule the hidden option to force-disable FastISel which will give</span><u></u><u></u></p>
<p><span lang="EN-GB" style="color:black">misleading guidance for bugs that lie in functions with optnone.</span><u></u><u></u></p>
</div>
</div>
</div>
<p class="MsoNormal">_______________________________________________<br>
LLVM Developers mailing list<br>
<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a><br>
<a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><u></u><u></u></p>
</blockquote>
</div>
</div></div></div></blockquote></div></div>