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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [debugify] gvn fail"
href="https://bugs.llvm.org/show_bug.cgi?id=37964">37964</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[debugify] gvn 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, vsk@apple.com
</td>
</tr>
<tr>
<th>Blocks</th>
<td>37953
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20482" name="attach_20482" title="ll reproducer">attachment 20482</a> <a href="attachment.cgi?id=20482&action=edit" title="ll reproducer">[details]</a></span>
ll reproducer
$ clang -v
clang version 7.0.0 (trunk 335708) (llvm/trunk 335721)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: e:\work\upstream-llvm\build-vs2015-native-ninja\bin
$ cat global_value_numbering.cpp
int foo;
char bar();
void baz() {
for (;;)
for (; foo; foo = bar())
;
}
$ clang global_value_numbering.cpp -O0 -Xclang -disable-O0-optnone -emit-llvm
-S -o - | opt -O3 -opt-bisect-limit=51 -S -o gvn-input.ll 2>nul
$ opt -disable-output -debugify-each -gvn gvn-input.ll
ERROR: Instruction with empty DebugLoc in function ?baz@@YAXXZ -- %.pr1 = phi
i32 [ 0, %for.cond ], [ %conv, %for.cond.loopexit.loopexit ]
CheckFunctionDebugify [Global Value Numbering]: 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>
<hr>
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