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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [debugify] lcssa fail"
href="https://bugs.llvm.org/show_bug.cgi?id=38162">38162</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[debugify] lcssa fail
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>greg.bedwell@sony.com
</td>
</tr>
<tr>
<th>CC</th>
<td>anastasis.gramm2@gmail.com, davide@freebsd.org, llvm-bugs@lists.llvm.org, sontuan.vu119@gmail.com, vsk@apple.com
</td>
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<th>Blocks</th>
<td>37953
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20554" name="attach_20554" title="ll reproducer">attachment 20554</a> <a href="attachment.cgi?id=20554&action=edit" title="ll reproducer">[details]</a></span>
ll reproducer
As seen at <a href="https://reviews.llvm.org/D49297#1161794">https://reviews.llvm.org/D49297#1161794</a> where LCSSA had the largest
number of debugify failures across a PS4 codebase.
$ clang -v
clang version 7.0.0 (trunk 337000) (llvm/trunk 337003)
Target: x86_64-scei-ps4
Thread model: posix
InstalledDir: e:\work\upstream-llvm\build-vs2015-ps4-ninja\bin
$ cat Debugifind.2.FAIL.Loop-Closed_SSA_Form_Pass.cpp
bool foo(int bar) {
while (bar)
bar--;
return (!bar);
}
$ clang.exe Debugifind.2.FAIL.Loop-Closed_SSA_Form_Pass.cpp -S -emit-llvm -O0
-Xclang -disable-O0-optnone -o Debugifind.2.FAIL.Loop-Closed_SSA_Form_Pass.ll
$ opt.exe -disable-output -debugify-each -simplifycfg -lcssa
Debugifind.2.FAIL.Loop-Closed_SSA_Form_Pass.ll
WARNING: Missing line 7
WARNING: Missing line 11
CheckFunctionDebugify [Simplify the CFG]: PASS
CheckFunctionDebugify [LCSSA Verifier]: PASS
ERROR: Instruction with empty DebugLoc in function _Z3fooi -- %.lcssa = phi
i32 [ %1, %while.cond ]
CheckFunctionDebugify [Loop-Closed SSA Form Pass]: FAIL
CheckFunctionDebugify [Module Verifier]: PASS
$</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - [meta] [debugify] fix -check-debugify failures"
href="https://bugs.llvm.org/show_bug.cgi?id=37953">Bug 37953</a>] [meta] [debugify] fix -check-debugify failures
</li>
</ul>
</div>
<br>
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