<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Early Machine LICM] Bad machine code: Virtual register killed in block, but needed live out."
href="https://bugs.llvm.org/show_bug.cgi?id=47483">47483</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[Early Machine LICM] Bad machine code: Virtual register killed in block, but needed live out.
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>paulsson@linux.vnet.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23945" name="attach_23945" title="reduced testcase">attachment 23945</a> <a href="attachment.cgi?id=23945&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase
llc -mcpu=z13 -O3 tc_mver_vregkilled_neededliveout.ll
-sink-insts-to-avoid-spills -verify-machineinstrs
*** Bad machine code: Virtual register killed in block, but needed live out.
***
- function: main
- basic block: %bb.3 bb5 (0x677c338)
Virtual register %5 is used after the block.
LLVM ERROR: Found 1 machine code errors.
An LLGCR instruction with a killed vreg %5 is moved *into* the loop without the
kill flag being cleared...</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>