yum-mirror/slang

Making it easier to work with shaders

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

venkataram-nvWarn when inout parameter is never written (#4777)20bd48659

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1//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
2//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
3//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
4
5//TEST_INPUT:ubuffer(data=[0], stride=4):out,name=outputBuffer
6RWStructuredBuffer<float> outputBuffer;
7
8float rng(int state, float x)
9{
10    return state + x;
11}
12
13[BackwardDerivativeOf(rng)]
14void rng_bwd(int inState, inout DifferentialPair<float> x, float dOut)
15{
16    x = diffPair(x.p, (float)inState + dOut - 1.0);
17}
18
19[numthreads(1, 1, 1)]
20void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
21{
22    var x = diffPair(2.0, 1.0);
23
24    __bwd_diff(rng)(4, x, 3.0);
25
26    outputBuffer[0] = x.d; // should be 6
27
28}