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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang on sparc64 generates reference to unknown symbol __muloti4"
href="https://bugs.llvm.org/show_bug.cgi?id=52043">52043</a>
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<th>Summary</th>
<td>clang on sparc64 generates reference to unknown symbol __muloti4
</td>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>Sun
</td>
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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>normal
</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
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</tr>
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<th>Reporter</th>
<td>mikulas@artax.karlin.mff.cuni.cz
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>If you compile the following program with -O2, it will fail to link with
undefined reference to `__muloti4'
The bug happens with clang-14 on Sparc64, installed from Debian ports. It
doesn't happen on x86-64 or arm64.
The bug only happens with clang-14, it doesn't happen with older versions.
#include <stdio.h>
__attribute__((noinline)) int mul(__int128 a, __int128 b, __int128 *r)
{
*r = (unsigned __int128)a * (unsigned __int128)b;
return *r / a == b;
}
int main(void)
{
__int128 r;
int o;
o = mul(2, 3, &r);
printf("%d - %d\n", o, (int)r);
return 0;
}</pre>
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