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//TEST:SIMPLE(filecheck=CHK):-target hlsl -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-DAG: note: checkpointing context of 20 bytes associated with function: 'test_loop_with_continue'
13[BackwardDifferentiable]
14float test_loop_with_continue(float y)
15{
16    //CHK-DAG: note: 20 bytes (FixedArray<float, 5> ) used to checkpoint the following item:
17    float t = y;
18
19    for (int i = 0; i < 3; i++)
20    {
21        if (t > 4.0)
22            continue;
23
24        t = t * t;
25    }
26
27    return t;
28}
29
30[numthreads(1, 1, 1)]
31void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
32{
33    {
34        dpfloat dpa = dpfloat(2.0, 0.0);
35
36        __bwd_diff(test_loop_with_continue)(dpa, 1.0f);
37        outputBuffer[0] = dpa.d; // Expect: 32.0
38    }
39
40    {
41        dpfloat dpa = dpfloat(0.4, 0.0);
42
43        __bwd_diff(test_loop_with_continue)(dpa, 1.0f);
44        outputBuffer[1] = dpa.d; // Expect: 0.0131072
45    }
46}
47
48//CHK-NOT: note