yum-mirror/slang

Making it easier to work with shaders

git clone https://git.yummers.dev/yum-mirror/slang

Alexey PanteleevSupport for querying which parameters are used in emitted code (#2239)69cb6e8f3

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1// used-parameters.slang
2
3// Tests post-emit analysis of shader parameters to find out if they are used or not.
4
5//TEST:REFLECTION:-stage compute -entry main -target hlsl
6
7
8struct S
9{
10    uint2 Size;
11};
12
13ConstantBuffer<S> UsedCB;
14ConstantBuffer<S> UnusedCB;
15
16Texture2D UsedTexture;
17Texture2D UnusedTexture;
18
19Buffer<uint> UsedBuffer;
20Buffer<uint> UnusedBuffer;
21
22StructuredBuffer<uint> UsedStructuredBuffer;
23StructuredBuffer<uint> UnusedStructuredBuffer;
24
25RWTexture2D UsedRWTexture;
26RWTexture2D UnusedRWTexture;
27
28RWBuffer<uint> UsedRWBuffer;
29RWBuffer<uint> UnusedRWBuffer;
30
31RWStructuredBuffer<uint> UsedRWStructuredBuffer;
32RWStructuredBuffer<uint> UnusedRWStructuredBuffer;
33
34SamplerState UsedSampler;
35SamplerState UnusedSampler;
36
37uniform uint UsedUniform;
38uniform uint UnusedUniform;
39
40[numthreads(1, 1, 1)]
41void main(uint3 dispatchThreadID : SV_DispatchThreadID)
42{
43    float A = UsedTexture[dispatchThreadID.xy].x;
44    uint B = UsedBuffer[dispatchThreadID.x];
45    uint C = UsedStructuredBuffer[dispatchThreadID.y];
46    float D = UsedRWTexture[dispatchThreadID.xy].x;
47    uint E = UsedRWBuffer[dispatchThreadID.y];
48    float F = UsedTexture.SampleLevel(UsedSampler, float2(dispatchThreadID.xy) / float2(UsedCB.Size), 0).x;
49    uint G = UsedUniform;
50
51    UsedRWStructuredBuffer[dispatchThreadID.x + dispatchThreadID.y * UsedCB.Size.x] = uint(A) + B + C + uint(D) + E + uint(F) + G;
52}