<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/73481>73481</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            `.intel_syntax` should respect `mov` with 64-bit address
        </td>
    </tr>

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

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

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

<pre>
    The following LLVM module:
```llvm
source_filename = "example.e8d519bf5b4bcf09-cgu.0"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

module asm ".intel_syntax"
module asm "mov    [0x1234567890], al"
module asm "movabs [0x1234567890], al"

!llvm.module.flags = !{!0, !1}

!0 = !{i32 8, !"PIC Level", i32 2}
!1 = !{i32 2, !"RtLibUseGOT", i32 1}
```

Gives rise to the following encoding:
```asm
.text:
 mov BYTE PTR ds:0x34567890,   al ; 88 04 25 90 78 56 34
 movabs       ds:0x1234567890, al ;       a2 90 78 56 34 12 00 00 00
```

Note, in the first case, the silent truncation of an address that cannot fit into a 32-bit integer, despite the attempt to use `.intel_syntax`. The `movabs` pseudo-instruction is part of "AT&T syntax", and you will not find it in the Intel 64 SDM. I do not think there is any harm in respecting `movabs` despite that, but `mov` with such a large constant should probably be assembled to the same encoding.
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJyEVVtvozgU_jXOyxHI2GDIQx7SZjuq1NkdzWRX2qfKwAE8NTbCpkn-_cqQW7s3hBxsn-9cPn8-kc6p1iBuSPZAst1KTr6z4-Zgxzdl2p9TqTTiqrT1abPvEBqrtT0o08LLyx9fobf1pJHwLaE7QrdE0OXV-r1flpydxgpfG6XRyB6B8B0QxvAo-0FjjEWdJeuyycq0rBq6jqp2iilhbEF7ObbooZZeanmyk7_io57wLUYDyynhW87mIUyTj9PwJdJ5iNTloykCKGFFZIrwIS4YkUY_ElZ8ju9HNehr7sdCvIo0msybsQcTaWWmY9Sa6YpaxoUbkK4PoFgZj_rVnYyXx6vlR5vevgMAkOyBHhPG00zkxZqSbEfYI0j97yhZuv9HnUeWhMOJFx9xo2XrzoUlJH8gLKEBR1iSkHz3CUnvLBVnUJxNCWPfnh_hBd9xjsceIWyzmweWJJ-w7Ib97l9U-bvDL7_t79B38S-yuk_ni3pHB6NyCN6C_6BNNJWtlWn_LkzpzrqMPR79dR8C9Q9_7n-Bb_vvUDvCt_R4pZI9AoDUQPgDFAXQFFgGawp5AZkAnt58hINYnrOPuwOZT2P2sTyS3fuAhAGly_sfVf9qPc4EmaVkNToPlXTzYlhx4aIFxU6mkl5ZA7YBaUDW9YjOge9kABhjPTTKgzLeggTOonKZYYtjcFajG5TH2an0HvvBB6Inh0AE_ShnQWMI3YEIupBABIXB4VTbSBnnx6maU1EOBjn6kBJhbLsnTOzhdiUCQ6aGk53goLSGJUdTw5zZnMlzCAsihR-7rzE8Q21nK98p8xYMRgxBpDlBJ8c-oEZ0A1Y-yOJDerf6pA-Ry9BcZoOwe1C-AzdVHUjQoQlAZY3z0nhwnZ10DcNoS1nqE5ThJjrsS431RYoutLqLCuNVveH1mq_lCjdJThMqGE_pqtuISghJU0YbznkqaprSXORFXnLRrFOsV2rDKONJwnKaJWtK4yorilwyWeWSszptSEqxl0rH86W2Y7tSzk24yXlaJCstS9Rubu2MGTzAvBmoznarcRMwUTm1jqRUK-fdzYtXXuPmHw76Uv6Z1s-UiXTW0Vltq2nUm877IVwGwp4Ie2qV76YyrmxP2NP8N7H8RMNof2LlCXuak3SEPc1F_BUAAP__EGzxJw">