<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/133754>133754</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            not_tail_called interaction with LTO and merging of decls on LTO
        </td>
    </tr>

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

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

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

<pre>
    This is more of a semantic question rather than a bug report (though it might turn into a bug report due to what is thought about).

Anyways take these 2 TUs:
```
int f(void) __attribute__((not_tail_called));
int g1(void);
int h(void)
{
  return g1();
}
int g(void)
{
  return f();
}
```
and 
```
int f(void);
int g(void);
int g1(void)
{
  return f();
}
int h1(void)
{
  return g();
}
```

When g gets inlined into h1, will f cause a tail call or not? Likewise for g1 inlined into h?
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJyUk8Fu2zwMx59GvhANbMlOnIMP6Vf4VOC7dNgxkG1G4ipLmUQ36NsPcrO164YAAwQIIPkj-QdJnRIZj9iJ5l40D4Ve2IbYncmnZ9LFEKbX7slSAkowh4gQTqAh4aw90wjfF0xMwUPUbDECW-1Bw7AYiHgOkUHIlm1YjAVimMlYBl6iB_Icfo-cFgQOcLGac7U3ikEPYWEh9xtRHkR5OPjXi35NwPoZgS0mBAlPX5JQ2Su25fWVB_IMJyHbl0CTkHs4HjVzpGFhPB6FbIVsfeAja3LHUTuHOSo_dX-lTfWOv1vtB2N5ELtsB4i4ylqRX-Fi9_Az1S3o9CfzUYj2E9zW9qHlvxqrf6y-yrwJmdsti_Lw1aIHAwY5AXlHHqe3oefE_8GFnIMTjHpJCBryFCBPAUIEH1ioHh7pGS-UEE4hgqk-ZRGqL6ZOTXu11wV21a5WdV3Jpils17btdpRNVTfDcKqnemz3ethP7aRxty1xV1AnS9mUSlXVrqqrerMd6loNZTMqXW5RNaIucdbkNs69zJsQTUEpLdhVSu2aunB6QJfWo5HS4wVWr5Ay31DsMnQ3LCaJunSUOL2nYWKH3afFy5Iw6nE9pQuxhcen_yHPfcZoyJt8dhOOLkHw2Vcs0XWW-bzuveyF7A2xXYbNGGYh-1zu-t2dY_iGIwvZr00mIfuripdO_ggAAP__fLw4Og">