<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/62762>62762</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            32-bit-only misoptimization of `printf` calls on Windows
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang,
            regression,
            platform:win32
      </td>
    </tr>

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

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

<pre>
    This program:
```c
#include <stdio.h>
#include <stdlib.h>

int main() {
    for (int i = 0; i < 32; ++i) {
        printf("%u ", rand());
    }
    printf("\n");
}
```
prints 32 copies of the same integer value when compiled with optimization in an x86 Visual Studio 2022 17.7 Preview 1 command prompt (`clang -O1 repro.c -o repro.exe`). Note that this is the first VS preview to include Clang 16, specifically LLVM-16.0.1. Clang 15.0.1 included in the box with VS 2022 17.6 correctly compiles the program with and without optimization targeting either x64 or x86.

</pre>
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