yum-mirror/slang

Making it easier to work with shaders

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

Sai Praveen BangaruAdd a loop analysis step to infer the exit values of loop phi parameters. (#6696)41e7e565e

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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//DISABLE_TEST:SIMPLE(filecheck=CHK):-target glsl -stage compute -entry computeMain -report-checkpoint-intermediates
5
6//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
7RWStructuredBuffer<float> outputBuffer;
8
9typedef DifferentialPair<float> dpfloat;
10typedef float.Differential dfloat;
11
12//CHK: note: checkpointing context of 24 bytes associated with function: 'test_simple_loop'
13[Differentiable]
14float test_simple_loop(float y)
15{
16    //CHK: note: 20 bytes (FixedArray<float, 5> ) used to checkpoint the following item:
17    float t = y;
18
19    //CHK: note: 4 bytes (int32_t) used for a loop counter here:
20    for (int i = 0; i < 3; i++)
21    {
22        t = t * t;
23    }
24
25    return t;
26}
27
28[numthreads(1, 1, 1)]
29void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
30{
31    {
32        dpfloat dpa = dpfloat(1.0, 0.0);
33
34        __bwd_diff(test_simple_loop)(dpa, 1.0f);
35        outputBuffer[0] = dpa.d; // Expect: 8.0
36    }
37
38    {
39        dpfloat dpa = dpfloat(0.4, 0.0);
40
41        __bwd_diff(test_simple_loop)(dpa, 1.0f);
42        outputBuffer[1] = dpa.d; // Expect: 0.0131072
43    }
44}
45
46//CHK-NOT: note