<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/150075>150075</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [CFI] missing .cfi symbols when alias override weak function
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            compiler-rt:cfi,
            LTO
      </td>
    </tr>

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

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

<pre>
    cat ../a.c
```
__attribute__((alias("g"), visibility("default"))) void f(void);
__attribute__((visibility("default"))) void g(void) {}
```

cat ../b.c
```
__attribute__((weak, visibility("default"))) void f(void) { }

int main(int argc, char **argv) {
  argv[0] = (char *)f;
  void (*fp)(void) = (void (*)(void))argv[0];
  fp();
}
```
clang ../a.c ../b.c -fsanitize=cfi-icall -flto=thin -fvisibility=hidden -fuse-ld=lld -o x -Wl,-save-temps -Wl,--thinlto-jobs=1

```
ld.lld: error: undefined hidden symbol: f.cfi
>>> referenced by ld-temp.o
>>> x.lto.o:(f)
>>> did you mean: g.cfi
>>> defined in: /tmp/x.lto.a-3b6dcc.o
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```
</pre>
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