Initial xtask check-in

shader/hello-world.slang

@@ -0,0 +1,11 @@
+StructuredBuffer<float> buffer0;
+StructuredBuffer<float> buffer1;
+RWStructuredBuffer<float> result;
+
+[shader("compute")]
+[numthreads(1,1,1)]
+void computeMain(uint3 threadId : SV_DispatchThreadID)
+{
+    uint index = threadId.x;
+    result[index] = buffer0[index] + buffer1[index];
+}