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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Debugify] "Missing line" false alarm on PHI node"
href="https://bugs.llvm.org/show_bug.cgi?id=49959">49959</a>
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<th>Summary</th>
<td>[Debugify] "Missing line" false alarm on PHI node
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Transformation Utilities
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>yilong.guo@intel.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
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<pre>debugify always report "missing line" false alarms on PHI node when PHI node is
untouched by the target pass.
Probably relates to <a href="https://reviews.llvm.org/D75242">https://reviews.llvm.org/D75242</a>
applyDebugifyMetadata adds debug locations on PHI nodes, but
checkDebugifyMetadata unconditionally skips PHI nodes during
missing-line-check.
ll reproducer:
; debugify-ignore-phi.ll
define void @test_phi(i1 %cond) {
0:
br i1 %cond, label %1, label %2
1:
br label %2
2:
%v = phi i32 [ 0, %0 ], [ 1, %1 ]
ret void
}
opt -disable-output -debugify-each -passes=helloworld debugify-ignore-phi.ll
<span class="quote">>> test_phi
>> WARNING: Missing line 3
>> CheckFunctionDebugify [HelloWorldPass]: PASS</span >
I think we should skip PHI nodes for applying debug locations as well.</pre>
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</p>
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