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//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute -output-using-type -shaderobj
//TEST:SIMPLE(filecheck=CHECK): -target hlsl -profile cs_5_0 -entry computeMain -line-directive-mode none
//TEST:SIMPLE(filecheck=CHK):-target glsl -stage compute -entry computeMain -report-checkpoint-intermediates
//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
RWStructuredBuffer<float> outputBuffer;
typedef DifferentialPair<float> dpfloat;
typedef float.Differential dfloat;
[BackwardDifferentiable]
[PreferCheckpoint]
float g(float x)
{
return log(x);
}
//CHK: note: checkpointing context of 4 bytes associated with function: 'f'
[BackwardDifferentiable]
float f(int p, float x)
{
float y = 1.0;
// Test that phi parameter can be restored.
if (p == 0)
//CHK: note: 4 bytes (float) used to checkpoint the following item:
y = g(x);
return y * y;
}
// Check that there are no calls to primal_g in bwd_f.
// CHECK: void s_bwd_f_{{[0-9]+}}
// CHECK-NOT: {{[_a-zA-Z0-9]+}} = s_primal_ctx_g_{{[0-9]+}}
// CHECK: return
[numthreads(1, 1, 1)]
void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
{
dpfloat dpa = dpfloat(2.0, 0.0);
__bwd_diff(f)(0, dpa, 1.0f);
outputBuffer[0] = dpa.d; // Expect: 1
}
//CHK-NOT: note
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