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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Debug info IR: DebugMDNode"
href="http://llvm.org/bugs/show_bug.cgi?id=22235">22235</a>
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<tr>
<th>Summary</th>
<td>Debug info IR: DebugMDNode
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</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>
</tr>
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<th>Component</th>
<td>Core LLVM classes
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>dexonsmith@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Introduce a new IR node specialized for DWARF tags with similar assembly syntax
to MDLocation (<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Debug info IR: MDLocation"
href="show_bug.cgi?id=21433">bug 21433</a>).
The construct needs to be generic enough to handle any DW_TAG we currently
stuff into MDNode, and is meant to serve as a base class for specific DW_TAG
classes going forward.
My naming plan is to call the base class (which inherits from
`UniquableMDNode`) `DebugMDNode`, and the leaf class `GenericDebugMDNode`.
This is step 4 of the original plan from the RFC [1]: pull the DW_TAG out of
the header field to put in the `tag` field, and leave it otherwise similar to
an MDNode.
!7 = !GenericDebugMDNode(tag: DW_TAG_compile_unit, fields: "0\00clang
3.6\00...", operands: { !8, !9, ... })
[1]: <a href="http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-October/077715.html">http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-October/077715.html</a></pre>
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</p>
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