<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [debugify] simplifycfg fail"
href="https://bugs.llvm.org/show_bug.cgi?id=37961">37961</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[debugify] simplifycfg 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=20479" name="attach_20479" title="ll reproducer">attachment 20479</a> <a href="attachment.cgi?id=20479&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 simplify_the_cfg.cpp
void foo(int bar, int baz) {
for (;; bar++)
for (; bar; bar++)
if (baz)
;
}
$ clang simplify_the_cfg.cpp -O0 -Xclang -disable-O0-optnone -S -emit-llvm -o -
| opt -simplifycfg -instcombine -S -o simplifycfg-input.ll
$ opt simplifycfg-input.ll -disable-output -debugify-each -simplifycfg
ERROR: Instruction with empty DebugLoc in function ?foo@@YAXHH@Z -- %0 = load
i32, i32* %bar.addr, align 4, !dbg !30
ERROR: Instruction with empty DebugLoc in function ?foo@@YAXHH@Z -- %inc4 =
add nsw i32 %0, 1, !dbg !30
WARNING: Missing line 9
WARNING: Missing line 10
WARNING: Missing line 11
WARNING: Missing line 12
WARNING: Missing line 13
WARNING: Missing line 14
WARNING: Missing variable 5
WARNING: Missing variable 6
WARNING: Missing variable 7
WARNING: Missing variable 8
CheckFunctionDebugify [Simplify the CFG]: 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>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>