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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Compile error when input operator constraint of inline asm has "o""
href="https://bugs.llvm.org/show_bug.cgi?id=42839">42839</a>
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<th>Summary</th>
<td>Compile error when input operator constraint of inline asm has "o"
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<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>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>ueno.masakazu@jp.fujitsu.com
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22321" name="attach_22321" title="Error log when compiling ruby">attachment 22321</a> <a href="attachment.cgi?id=22321&action=edit" title="Error log when compiling ruby">[details]</a></span>
Error log when compiling ruby
When compiling ruby-2.5.5 on aarch64/thunderX2t99, the compilation process is
aborted.
The problem seems to be due to the input operator constraint of inline asm
having "o".
Here's a short example.
-------------------
//This program aborts because "o" is included in "nor".
void hoge(void)
{
static const char *str = "HOGE";
__asm__ __volatile__(".asciz \"%[_SDT_A2]\"" : : [_SDT_A2] "nor" ((str)));
}
-------------------
There is no description of the "o" in the AArch64 section of the following URL,
but how should it be done?
> <a href="https://llvm.org/docs/LangRef.html#supported-constraint-code-list">https://llvm.org/docs/LangRef.html#supported-constraint-code-list</a>
If "o" is included, is it correct to ignore it?
The environment used for confirmation is as follows.
$ clang --version
clang version 7.0.1 (tags/RELEASE_701/final)
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /oss/LLVM/llvm-7.0.1/install/bin</pre>
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