<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/85374>85374</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [RISCV] Miscompile at -O3 with rvv
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            backend:RISC-V,
            miscompilation
      </td>
    </tr>

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

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

<pre>
    Reduced test case: https://godbolt.org/z/rcKc4Woee
```
#include <stdio.h>
#include <stdint.h>
int32_t a[3];
int main() {
  int f, b;
  for (b = 0; b < 3; b++)
    a[b] = ~(a[b] < 2);
  for (f = 0; f < 2; f++)
    printf("%d\n", a[1]);
  return 0;
}
```

```
> gcc test.c && ./a.out
-2
-2
> clang --target=riscv64-linux-gnu -march=rv64gcv -O3 test.c
> qemu-riscv64 -L /usr/riscv64-linux-gnu -cpu rv64,v=true,vext_spec=v1.0 ./a.out
-2
254
```

LLVM version: 0a739eb75fe68b1cec4e4aaad8b5395bb5da9a89
QEMU version: v8.2.1

</pre>
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