I’m quickly going crazy trying to find what’s causing this to not compile with D3DCompileFromFile, but I’m getting nowhere. I’d greatly appreciate if someone would please look over this short shader code and tell me whether there’s an error I’m missing.

struct GPUTile
{
    float4 pos[3];
};
AppendStructuredBuffer<GPUTile> renderTiles : register(u0);
StructuredBuffer<GPUTile> currentTiles : register(t0);
AppendStructuredBuffer<GPUTile> nextTiles : register(u1);

int IsVisible(GPUTile tile)
{
    return true;
}

bool IsLarge(GPUTile tile)
{
    return true;
}


[numthreads(4, 1, 1)]
void main(uint3 Gid : SV_GroupID, uint3 GTid : SV_GroupThreadID)
{
    const int3 subdivisionMap[4] =
    {
        { 0, 3, 5 },
        { 3, 1, 5 },
        { 4, 1, 5 },
        { 3, 4, 5 }
    };
    
    GPUTile currTile = currentTiles[Gid.x];
    float4 q1 = 0.5f * (currTile.pos[1] + currTile.pos[0]);
    float4 q2 = 0.5f * (currTile.pos[1] + currTile.pos[2]);
    float4 q3 = 0.5f * (currTile.pos[2] + currTile.pos[0]);
    
    float4 points[6] = { currTile.pos[0], currTile.pos[1], currTile.pos[2], q1, q2, q3 };
    
    int3 mapped = subdivisionMap[GTid.x];
    
    GPUTile newTile = (GPUTile) 0;
    newTile.pos[0] = points[mapped[0]];
    newTile.pos[1] = points[mapped[1]];
    newTile.pos[2] = points[mapped[2]];

    
    if (IsVisible(newTile))
    {
        if (IsLarge(newTile))
        {
            nextTiles.Append(newTile);
        }
        else
        {
            renderTiles.Append(newTile);
        }
    }

}

The code is intended to be a LOD algorithm for a triangular tile, though the issue is with compilation so I don’t think the algorithm needs explanation.

The error I get is D3D12 ERROR: ID3D12Device::CreateComputeShader: Compute Shader is corrupt or in an unrecognized format. [ STATE_CREATION ERROR #322: CREATECOMPUTESHADER_INVALIDSHADERBYTECODE]
which annoyingly I cannot find any information about.