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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Debug info IR: MDLocation"
href="http://llvm.org/bugs/show_bug.cgi?id=21433">21433</a>
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<th>Summary</th>
<td>Debug info IR: MDLocation
</td>
</tr>
<tr>
<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>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Core LLVM classes
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>dexonsmith@apple.com
</td>
</tr>
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<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>`MDLocation` is a first-class IR type that has two other representations:
`DILocation` (which now trivially wraps `MDLocation` instead of `MDNode`) and
`DebugLoc`. More details in the LLVMdev post [1].
[1]: <a href="http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-October/078173.html">http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-October/078173.html</a>
Aside from adding `MDLocation` itself, this PR includes adding general IR
support for non-MDNode metadata. In particular, a number of APIs expect only
`MDNode` instances. This affects metadata APIs such as
`Instruction::getMetadata()` and `NamedMDNode::getOperand()`, which need to use
`Value` instead of `MDNode`.</pre>
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