<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/115891>115891</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [llvm][ARM] Unable to use `.cantunwind` (and similar directives) in inline assembly
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          alexrp
      </td>
    </tr>
</table>

<pre>
    ```c
void _start(void)
{
    asm volatile (".cantunwind");
}
```

```console
❯ arm-linux-gnueabihf-gcc --version
arm-linux-gnueabihf-gcc (Ubuntu 13.2.0-4ubuntu3) 13.2.0
❯ arm-linux-gnueabihf-gcc test.c -nostdlib -fasynchronous-unwind-tables
❯ clang --version
clang version 19.1.2 (git@github.com:llvm/llvm-project.git d5498c39fe6a17e271ad5a02917103445eb89373)
❯ clang --target=arm-linux-gnueabihf test.c -nostdlib -fasynchronous-unwind-tables
test.c:3:19: error: .fnstart must precede .cantunwind directive
    3 |     asm volatile (".cantunwind");
      |                   ^
<inline asm>:1:2: note: instantiated into assembly here
    1 |         .cantunwind
      |         ^
1 error generated.
```

I would guess that `.fnstart`/`.fnend` is lacking similar handling to `.cfi_startproc`/`.cfi_endproc` in the integrated assembler?
</pre>
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