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<body><span class="vcard"><a class="email" href="mailto:atrick@apple.com" title="Andrew Trick <atrick@apple.com>"> <span class="fn">Andrew Trick</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - CodeGen crash with "Queue is empty!" on lshr i256 instruction"
href="https://llvm.org/bugs/show_bug.cgi?id=22304">bug 22304</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>ASSIGNED
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<td>RESOLVED
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - CodeGen crash with "Queue is empty!" on lshr i256 instruction"
href="https://llvm.org/bugs/show_bug.cgi?id=22304#c26">Comment # 26</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - CodeGen crash with "Queue is empty!" on lshr i256 instruction"
href="https://llvm.org/bugs/show_bug.cgi?id=22304">bug 22304</a>
from <span class="vcard"><a class="email" href="mailto:atrick@apple.com" title="Andrew Trick <atrick@apple.com>"> <span class="fn">Andrew Trick</span></a>
</span></b>
<pre>Author: Andrew Trick <<a href="mailto:atrick@apple.com">atrick@apple.com</a>>
Date: Thu Mar 26 20:44:13 2015
Fix a bug in SelectionDAG scheduling backtracking code: PR22304.
It can happen (by line CurSU->isPending = true; // This SU is not in
AvailableQueue right now.) that a SUnit is mark as available but is
not in the AvailableQueue. For SUnit being selected for scheduling
both conditions must be met.
This patch mainly defensively protects from invalid removing a node
from a queue. Sometimes nodes are marked isAvailable but are not in
the queue because they have been defered due to some hazard.
Patch by Pawel Bylica!
git-svn-id: <a href="https://llvm.org/svn/llvm-project/llvm/trunk@233351">https://llvm.org/svn/llvm-project/llvm/trunk@233351</a>
91177308-0d34-0410-b5e6-96231b3b80d8</pre>
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