<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <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>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>error: invalid type 'const _ExtInt(32)' in asm input cmp eax, magic
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>-New Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>pedro.lamarao@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <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>
        </div>
      </p>


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