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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 --- - Convert inline asm to MCInsts (nuke the pre-MC AsmPrinter)" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23933&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=LkkxeBmbHBI0qXg9c5cBa68uKpI6O3ehGLvec5ZkLpg&s=jlHh0SPavsPThRSV5C9f98JMiHJVMHFKoezVaMtdixA&e=">23933</a>
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<th>Summary</th>
<td>Convert inline asm to MCInsts (nuke the pre-MC AsmPrinter)
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>MC
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>dexonsmith@apple.com
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu, pete.cooper@gmail.com, rafael.espindola@gmail.com
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Quoting Rafael in
<a href="http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20150622/283583.html">http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20150622/283583.html</a>
--
The way inline asm is implemented is
* We kept most of the old (pre-MC) assembly printer around.
* We use it to print/expand inline asm to a string.
* We parse that string.
So anything that can show up in inline asm needs a name by which we
can find it again.
I think the way to fix this is to directly transition from the inline
asm pattern "bsr $0,%eax" to a MCInst with an operand pointing to
whatever we created for $0. That will let us nuke the old printer and
save memory by not creating names just in case they are used in inline
asm.
--
Filing this so we don't forget the plan. Once that's done, we should bring
r240130/r240302 back, dropping names from temp symbols.</pre>
</div>
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