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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - error: invalid type 'const _ExtInt(32)' in asm input cmp eax, magic"
href="https://bugs.llvm.org/show_bug.cgi?id=51654">51654</a>
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<th>Summary</th>
<td>error: invalid type 'const _ExtInt(32)' in asm input cmp eax, magic
</td>
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<th>Product</th>
<td>clang
</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>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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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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</tr>
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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>
<div>
<pre>Expected:
Clang assembler accepts constexpr _ExtInt(32) as immediate input operand in an
asm block.
Current:
Clang rejects _ExtInt input operands in asm blocks.
Consider:
constexpr _ExtInt(32) magic = 0x36d76289;
extern
void kernel ();
extern "C"
[[gnu::naked]]
void start ()
{
__asm__
{
cmp eax, magic
jne halt
call kernel
halt:
hlt
jmp halt
}
}
<a href="https://godbolt.org/z/3588MW9s3">https://godbolt.org/z/3588MW9s3</a></pre>
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