<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/120870>120870</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            diagnostics: clang loses provenance of inline asm when issuing diagnostics
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          lf-
      </td>
    </tr>
</table>

<pre>
    ```
$ cat test.c
asm ("foo");

int main(void) {
}
$ clang test.c
<inline asm>:1:1: error: invalid instruction mnemonic 'foo'
    1 | foo
      | ^
1 error generated.
```

When issuing diagnostics, clang loses where the inline asm is. It should issue a hint of where it starts in the source file or something like that. This issue was encountered while hunting down a diagnostic in production code:

```
<inline asm>:2:41: error: expected '%<type>' or "<type>"
    2 | .pushsection ".debug_gdb_scripts", "MS",@progbits,1
      | ^
<inline asm>:102:12: error: .popsection without corresponding .pushsection
  102 | .popsection
      |            ^
```

If this happens in CI for a weird platform (which, if you're having a bad day, of course it is), it necessitates preprocessing the file and hopefully finding where this thing came from, which may require dismantling a build system to get access to even do so; fun for all ages. n.b. the above is probably another bug, but I will figure out what it is and file it separately.

```
$ clang --version
clang version 18.1.8
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /nix/store/im1yhwr0p1j7r5mi47cyn4sq3wmhzkzf-cl
ang-18.1.8/bin
```
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJx0VU1v4zgM_TXKhYhhy06dHHzIpBOghz3tAHssZIu2OJUljz7iZn79Qo47TbDdIEGsD5LvkY-08J4Gg9iw3Te2e96IGJR1je63m9bKa8Oe8vWbHxmvoBMBAvqQdSw_Cj8C43vGeW8t45zxAyu_pZv5kUyAUZBhfH-xJBk_AKuXs_r5w5cWZvj0xsoTGU0GQfiRld9ZeSzWH6Bz1qUHMhehSQIZH1zsAlkDo8HRGuqA8XoBUrP8CABQAKtPkLZua1jWbPed5cfi5hMGNOhEQJklCPds8-M_Cg2Q95HMAJLEYKwP1HnGTyt4bT16mBU6hKAQPgkA-QxeAnhlo5aLFwQBKuXF9qsJBfBBuOCBzGLvbXQdQk8awTrwdsSgUnRNbymCCBn8UORXf7PwgKaz0QR0KGFWyVBFExbEdjYg7oCnKJOzcs1bZyWy8njj-kD9v5XgrDxWj6XA9wm7gDKlnfEdK0_hOmG6zusEPgnibo-vReBLEbIpeuXxBoRxnkls4_A6yPbVd46m4Bc9ndLZX3_fnlmVT84OLaXDU_FFUb-SUJ6gF_wBejbZ6SP4TEHZGKCzzqGfrJEpd_f4lkBF_gH8j-kDgLvPiuVRSy89hFQ4JaYJzVLw0wv01oGAGclJmLQIvXVLS82KOpXoUw9XGxmvHYISlwRNQCskSHFN57aHzkbnFy2RTx2YrAIY7NB7CiKgh8nh5OyykTpOrQoTRoKyE_ZR6yv0dKP-oWbycNNeJ0aE3tkxuV6QwSiu4PBXJIcgyY_CBL1ii6Ql-KsPOEKwMGAA0aXQaYUXNCAteMvKb9BHc8uA1iAG9BmYrM0WfKK1FwRK0G0rWn0FYWxQ6KCNQ8LRxgAvMJPW0NMQHUIq4qxEuGViIbewTE2Gk0hNrq_ZF2r_M4q22ws6f6vsbWddQ7HPimzP8uMP4QYMSUPv-6fXp2obzZuxs9lqMvF9O5iYLimHQsJoJep0dbKe3pMGjA9Ca5TPtMiQ8bOhd8bPPliHjJ9pLK5qdvlU_KzdbqSq7q6m8r_KeVS_3373206nsWuG7QqIn1sy93w2sinloTyIDTZFXVb7qip5sVENHgreI-ZVv-P7qjzkAkVV78qiyPuy6p421PCcVwXnPN8VPC-yXtRFvpc75LuiLg6SVTmOgnSm9WXMrBs2yxBqCp7v63yjRYvaL-8Rzpfspa7dPW9ckwy2bRw8q3JNPvhPF4GCxuZ-tpbHh9k6OXtBI0yHSet383X-n-G8iU43KoQpuWL8zPh5oKBim3VJwecUev3bTs7-xC6kzCcqnvHzyubS8H8DAAD___6uQfY">