<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/67620>67620</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Missing -Walign-mismatch warning for const parameters
        </td>
    </tr>

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

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

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

<pre>
    The following code

```c
#include <stdalign.h>

struct foo {
    int array[4];
};

typedef __attribute__((aligned(16))) struct foo foo16;

void bar(foo16 *foo);
void baz(const foo16 *foo);

void qux(struct foo *foo) {
 bar(foo);
    baz(foo);
}
```

gets a warning for `bar()`, but not `baz()`, with Clang 16.0.6:

```console
$ clang -c foo.c
foo.c:13:9: warning: passing 4-byte aligned argument to 16-byte aligned parameter 1 of 'bar' may result in an unaligned pointer access [-Walign-mismatch]
    bar(foo);
        ^
1 warning generated.
$ clang --version
clang version 16.0.6
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
```
</pre>
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