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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - r300404 breaks building seabios"
href="https://bugs.llvm.org/show_bug.cgi?id=32681">32681</a>
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<th>Summary</th>
<td>r300404 breaks building seabios
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>benny.kra@gmail.com
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<th>CC</th>
<td>chandlerc@gmail.com, dimitry@andric.com, djasper@google.com, llvm-bugs@lists.llvm.org
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<pre>Reduced test case:
$ cat t.c
unsigned long long rdmsr(unsigned index) {
unsigned long long ret;
asm("rdmsr" : "=A"(ret) : "c"(index));
return ret;
}
$ clang t.c -m16
fatal error: error in backend: Cannot select: t19: i32 = build_pair t17, t18
t17: i16,ch,glue = CopyFromReg t16, Register:i16 %AX, t16:1</pre>
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