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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - external assembler error with clang, ARM thumb: "branch out of range""
href="https://llvm.org/bugs/show_bug.cgi?id=31805">31805</a>
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<th>Summary</th>
<td>external assembler error with clang, ARM thumb: "branch out of range"
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>3.9
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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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>
<tr>
<th>Priority</th>
<td>P
</td>
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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>arnd@linaro.org
</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>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17917" name="attach_17917" title="preprocessed arch/arm/kernel/suspend.c file from linux, reduced">attachment 17917</a> <a href="attachment.cgi?id=17917&action=edit" title="preprocessed arch/arm/kernel/suspend.c file from linux, reduced">[details]</a></span>
preprocessed arch/arm/kernel/suspend.c file from linux, reduced
Building an "allmodconfig" build of the Linux kernel for ARM (with additional
patches to make it work initially), I ran into one assembler error that happens
specifically in Thumb2 mode. I used creduce to produce a smaller test case:
/home/arnd/cross/bin/clang -std=gnu89 -target arm-linux-gnueabihf -mthumb
-no-integrated-as -march=armv7-a -Wa,-mimplicit-it=always -O2 -c suspend.i
/tmp/suspend-be0319.s: Assembler messages:
/tmp/suspend-be0319.s:41: Error: branch out of range
clang: error: assembler command failed with exit code 1 (use -v to see
invocation)
The original file (before reducing) worked fine with clang-3.8 but broke with
3.9, the reduced version breaks with both, but still builds fine with gcc.</pre>
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