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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Subreg liveness] Assertion `INext != E && "Must have following segment"' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=41372">41372</a>
</td>
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<tr>
<th>Summary</th>
<td>[Subreg liveness] Assertion `INext != E && "Must have following segment"' failed
</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>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<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>Register Allocator
</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, quentin.colombet@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21726" name="attach_21726" title="reduced testcase">attachment 21726</a> <a href="attachment.cgi?id=21726&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase
llc -mcpu=z13 -O3 -o out.s -misched=ilpmin -systemz-subreg-liveness
tc_musthavefollseg.ll
llc: llvm/llvm-dev/lib/CodeGen/LiveIntervals.cpp:1142: void
llvm::LiveIntervals::HMEditor::handleMoveDown(llvm::LiveRange&)
: Assertion `INext != E && "Must have following segment"' failed.
Stack dump:
0. Program arguments: llc -mcpu=z13 -O3 -o out.s -misched=ilpmin
-systemz-subreg-liveness tc_musthavefollseg.ll
2. Running pass 'Machine Instruction Scheduler' on function '@main'
...
#9 0x000002aa3522b370
llvm::LiveIntervals::HMEditor::updateRange(llvm::LiveRange&, unsigned int,
llvm::LaneBitmask)
#10 0x000002aa3522bae4
llvm::LiveIntervals::HMEditor::updateAllRanges(llvm::MachineInstr*)
#11 0x000002aa3522eb50 llvm::LiveIntervals::handleMove(llvm::MachineInstr&,
bool)
#12 0x000002aa353563d4
llvm::ScheduleDAGMI::moveInstruction(llvm::MachineInstr*,
llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>)
...</pre>
</div>
</p>
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