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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] memcpyopt fail"
href="https://bugs.llvm.org/show_bug.cgi?id=37967">37967</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[debugify] memcpyopt 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>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Blocks</th>
<td>37953
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20484" name="attach_20484" title="ll reproducer">attachment 20484</a> <a href="attachment.cgi?id=20484&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 memcpy_optimization.cpp
struct Foo {
long f0;
long f1;
} *a;
int bar(Foo, Foo, int&c, Foo) {
c = bar(a[0], a[0], c, a[0]);
return c;
}
$ clang -target x86_64-unknown-unknown memcpy_optimization.cpp -O0 -Xclang
-disable-O0-optnone -emit-llvm -S -o memcpyopt-input.ll
$ opt -debugify-each -disable-output -instcombine -memcpyopt memcpyopt-input.ll
WARNING: Missing line 1
WARNING: Missing line 2
WARNING: Missing line 7
WARNING: Missing line 8
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 line 15
WARNING: Missing line 16
WARNING: Missing line 19
WARNING: Missing line 21
WARNING: Missing line 23
WARNING: Missing line 24
WARNING: Missing line 26
WARNING: Missing line 28
WARNING: Missing line 29
WARNING: Missing line 30
WARNING: Missing line 32
WARNING: Missing line 34
WARNING: Missing line 39
WARNING: Missing line 47
WARNING: Missing line 48
WARNING: Missing variable 1
WARNING: Missing variable 2
CheckFunctionDebugify [Combine redundant instructions]: PASS
ERROR: Instruction with empty DebugLoc in function _Z3bar3FooS_RiS_ --
%tmpcast = bitcast i8* %1 to %struct.Foo*
CheckFunctionDebugify [MemCpy Optimization]: 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>
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