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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DI Verifier doesn't catch missing type on DISubprogram"
href="https://llvm.org/bugs/show_bug.cgi?id=31392">31392</a>
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<th>Summary</th>
<td>DI Verifier doesn't catch missing type on DISubprogram
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>DebugInfo
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>dblaikie@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>aprantl@apple.com, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>I've pruned the metadata down a bit, since it's small enough to be legible,
etc:
define void @_Z1fv() #0 !dbg !6 {
entry:
ret void, !dbg !9
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!llvm.ident = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1,
emissionKind: FullDebug)
!1 = !DIFile(filename: "simple.cpp", directory: "/tmp/dbginfo")
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{!"clang version 4.0.0 (trunk 289692) (llvm/trunk 289697)"}
!6 = distinct !DISubprogram(name: "f", unit: !0)
!7 = !DISubroutineType(types: !8)
!8 = !{null}
!9 = !DILocation(line: 2, column: 1, scope: !6)
This crashes in CodeGen attempting to create debug info - specifically trying
to access the type of the DISubprogram, since it's not present.
Adding 'type: !7' to the DISubprogram fixes this & should be needed on all
DISubprograms, I think. (arguably we could define an unspecified type as being
'void()' but I don't think the savings in space are worth cost in terms of
complexity, etc)</pre>
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</p>
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