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<p>Yes. I'm pretty sure I know which change and will reintroduce
the check I removed. However, if someone could extract a IR test
case which triggers this, I'd appreciate it. I don't keep a
prebuilt copy of clang around and it looks like only the clang
tests catch this. I'd like to understand how exactly we got here.</p>
<p>Philip<br>
</p>
<br>
<div class="moz-cite-prefix">On 12/06/2016 08:29 PM, Peter
Collingbourne wrote:<br>
</div>
<blockquote
cite="mid:CAPQLkRjnT7updDz9t8jP6vFQjjFUBbEPV4CWpmZ5E6JcfKZgHg@mail.gmail.com"
type="cite">
<div dir="auto">Hi Philip,
<div dir="auto"><br>
</div>
<div dir="auto">One of our chromium bots has started failing
with an assertion failure in LVI.</div>
<div dir="auto"><br>
</div>
<div dir="auto"><a moz-do-not-send="true"
href="https://build.chromium.org/p/chromium.fyi/builders/ThinLTO%20Linux%20ToT/builds/635/steps/compile/logs/stdio">https://build.chromium.org/p/chromium.fyi/builders/ThinLTO%20Linux%20ToT/builds/635/steps/compile/logs/stdio</a><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">Could it be possible that one of your recent
changes has caused this?</div>
<div dir="auto"><br>
</div>
<div dir="auto">I'll see if I can get you a reproducer if you
can't figure it out.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Peter</div>
<div dir="auto"><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Dec 6, 2016 20:21, "Philip Reames
via llvm-commits" <<a moz-do-not-send="true"
href="mailto:llvm-commits@lists.llvm.org">llvm-commits@lists.llvm.org</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Author:
reames<br>
Date: Tue Dec 6 22:11:22 2016<br>
New Revision: 288884<br>
<br>
URL: <a moz-do-not-send="true"
href="http://llvm.org/viewvc/llvm-project?rev=288884&view=rev"
rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-<wbr>project?rev=288884&view=rev</a><br>
Log:<br>
Fix a warning introduced in r288874<br>
<br>
<br>
Modified:<br>
llvm/trunk/lib/Analysis/<wbr>LazyValueInfo.cpp<br>
<br>
Modified: llvm/trunk/lib/Analysis/<wbr>LazyValueInfo.cpp<br>
URL: <a moz-do-not-send="true"
href="http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/LazyValueInfo.cpp?rev=288884&r1=288883&r2=288884&view=diff"
rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-<wbr>project/llvm/trunk/lib/<wbr>Analysis/LazyValueInfo.cpp?<wbr>rev=288884&r1=288883&r2=<wbr>288884&view=diff</a><br>
==============================<wbr>==============================<wbr>==================<br>
--- llvm/trunk/lib/Analysis/<wbr>LazyValueInfo.cpp
(original)<br>
+++ llvm/trunk/lib/Analysis/<wbr>LazyValueInfo.cpp Tue Dec
6 22:11:22 2016<br>
@@ -186,7 +186,6 @@ private:<br>
if (NewR.isEmptySet())<br>
markOverdefined();<br>
else {<br>
- bool changed = Range != NewR;<br>
Range = std::move(NewR);<br>
}<br>
return;<br>
<br>
<br>
______________________________<wbr>_________________<br>
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</blockquote>
</div>
</div>
</blockquote>
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