Fix issue with transposing `IRMakeVector` with non-singleton operands (#3280)

1 files changed, 39 insertions, 0 deletions

diff --git a/tests/autodiff/make-array-non-uniform.slang b/tests/autodiff/make-array-non-uniform.slang
new file mode 100644
index 000000000..2cdedb864
--- /dev/null
+++ b/tests/autodiff/make-array-non-uniform.slang
@@ -0,0 +1,39 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+typedef DifferentialPair<float2> dpfloat2;
+typedef DifferentialPair<float3> dpfloat3;
+typedef DifferentialPair<float4> dpfloat4;
+
+[Differentiable]
+float4 f(float4 x)
+{
+    return float4(x.rgb, x.a * x.a);
+}
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
+{
+    {
+        float4 a = float4(1.0, 2.0, 3.0, 4.0);
+        float4 da = float4(1.0, 0.5, 1.5, 2.5);
+
+        outputBuffer[0] = fwd_diff(f)(dpfloat4(a, da)).d.x;
+    }
+
+    {
+        float4 a = float4(1.0, 2.0, 3.0, 4.0);
+        
+        var dpa = diffPair(a);
+
+        bwd_diff(f)(dpa, float4(1.0, 0.5, 1.5, 2.5));
+
+        outputBuffer[1] = dpa.d.x; // 1.0
+        outputBuffer[2] = dpa.d.y; // 0.5
+        outputBuffer[3] = dpa.d.z; // 0.0
+        outputBuffer[4] = dpa.d.a; // 0.0
+    }
+}