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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - AVR llvm-mc tests fail on big-endian (s390x) hosts"
href="https://bugs.llvm.org/show_bug.cgi?id=43384">43384</a>
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<th>Summary</th>
<td>AVR llvm-mc tests fail on big-endian (s390x) hosts
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<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>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: AVR
</td>
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<th>Assignee</th>
<td>me@dylanmckay.io
</td>
</tr>
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<th>Reporter</th>
<td>tstellar@redhat.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, sguelton@redhat.com
</td>
</tr></table>
<p>
<div>
<pre>The AVR llvm-mc tests are failing on s390x, because the encoding information
for the instructions are missing. The root cause is the byte swapping that the
AVRMCCodeEmitter::emitInstruction() function does.
Why is it necessary to swap the bytes like this?
Here is an example failure:
********************
FAIL: LLVM :: MC/AVR/syntax-reg-pair.s (22490 of 32518)
******************** TEST 'LLVM :: MC/AVR/syntax-reg-pair.s' FAILED
********************
Script:
--
: 'RUN: at line 1'; /root/llvm-project/llvm-build/bin/llvm-mc -triple avr
-mattr=addsubiw -show-encoding <
/root/llvm-project/llvm/test/MC/AVR/syntax-reg-pair.s |
/root/llvm-project/llvm-build/bin/FileCheck
/root/llvm-project/llvm/test/MC/AVR/syntax-reg-pair.s
--
Exit Code: 1
Command Output (stderr):
--
/root/llvm-project/llvm/test/MC/AVR/syntax-reg-pair.s:10:10: error: CHECK:
expected string not found in input
; CHECK: sbiw r24, 1 ; encoding: [0x01,0x97]
^
<stdin>:1:2: note: scanning from here
.text
^
<stdin>:5:2: note: possible intended match here
sbiw r24, 1 ; encoding: [0x00,0x00]
^
--</pre>
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