<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/150673>150673</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [HLSL][DirectX] Validation error seen when compiling code using D3DCOLORtoUBYTE4
        </td>
    </tr>

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

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

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

<pre>
    
Seeing validation error when compiling this code:
```
StructuredBuffer<float4> In0 : register(t0);

RWStructuredBuffer<uint4> Out0 : register(u1);


[numthreads(1,1,1)]
void main() {

Out0[0] = D3DCOLORtoUBYTE4(In0[0]);
Out0[1] = D3DCOLORtoUBYTE4(float4(0, 11.11, -50.5, 100));
}
```
https://godbolt.org/z/oEsfTrTMr

```
Function: main: error: Assignment of undefined values to UAV.
# | note: at 'call void @dx.op.rawBufferStore.i32(i32 140, %dx.types.Handle %1, i32 1, i32 0, i32 undef, i32 2833, i32 0, i32 25500, i8 15, i32 4)' in block 'entry' of function 'main'.
# | Validation failed.
```
</pre>
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