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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - PowerPC - code generation issue when using -break-anti-dependences=critical"
href="https://llvm.org/bugs/show_bug.cgi?id=31193">31193</a>
</td>
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<th>Summary</th>
<td>PowerPC - code generation issue when using -break-anti-dependences=critical
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>3.9
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>eric.schweitz@pgroup.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17676" name="attach_17676" title="branch target out of range">attachment 17676</a> <a href="attachment.cgi?id=17676&action=edit" title="branch target out of range">[details]</a></span>
branch target out of range
We are seeing the following problem with the attached input (reduced.ll) with
the OpenPOWER8 tools.
% llc -version
LLVM (<a href="http://llvm.org/">http://llvm.org/</a>):
LLVM version 3.9.1
Optimized build.
Default target: powerpc64le-unknown-linux-gnu
Host CPU: pwr8
Registered Targets:
ppc32 - PowerPC 32
ppc64 - PowerPC 64
ppc64le - PowerPC 64 LE
% llc reduced.ll -mcpu=native -O2 -break-anti-dependencies=critical
-code-model=large -o reduced.s
% /usr/bin/as reduced.s -mpower8 -o reduced.o
reduced.s: Assembler messages:
reduced.s:751: Error: operand out of range (0x0000000000008000 is not between
0xffffffffffff8000 and 0x0000000000007ffc)
This does not reproduce on trunk with this .ll file; however, small
perturbations in code generation could cause the label to fall within range.
If -filetype=obj is used, no diagnostic is given, but the output has a backward
branch to the incorrect target rather than a forward branch.</pre>
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