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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - error: invalid type '_ExtInt(8)' in asm output"
href="https://bugs.llvm.org/show_bug.cgi?id=51521">51521</a>
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<th>Summary</th>
<td>error: invalid type '_ExtInt(8)' in asm output
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>12.0
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>pedro.lamarao@gmail.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
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<pre>Expected:
Clang assembler knows how to bind _ExtInt variables and extended assembler
parameters.
Current:
Clang rejects _ExtInt in extended assembler parameters.
This function:
void out1 ( _ExtInt(16) port, _ExtInt(8) data )
{
__asm__ ( "outb %0, %1" : : "a"(data), "Nd"(port) : );
}
raises this error:
<source>:3:37: error: invalid type '_ExtInt(8)' in asm output
__asm__ ( "outb %0, %1" : : "a"(data), "Nd"(port) : );
Test case in Godbolt with Clang trunk: <a href="https://godbolt.org/z/xdx5TMPd8">https://godbolt.org/z/xdx5TMPd8</a></pre>
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