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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [LoopDataPrefetch] Creates prefetch 3.5 terabytes ahead"
href="https://bugs.llvm.org/show_bug.cgi?id=43679">43679</a>
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<th>Summary</th>
<td>[LoopDataPrefetch] Creates prefetch 3.5 terabytes ahead
</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>
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<th>Component</th>
<td>Loop Optimizer
</td>
</tr>
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<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=22671" name="attach_22671" title="reduced testcase">attachment 22671</a> <a href="attachment.cgi?id=22671&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase
NextLSCEV for the load in LoopDataPrefetch is
{(3564822854692 + @0),+,21474836474}<%bb6>
This seems to disappear if I revert 354ba69 "[CVP} Replace SExt with ZExt if
the input is known-non-negative".
bin/llc -mcpu=z13 -O1 -o - tc_loopdpf_oor.opt.ll
...
larl %r1, __unnamed_1+3564822854692
...
This results in a linker error "relocation truncated to fit".</pre>
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