adds test_reduction_adds_deps

test/test_codegen.py

@@ -1034,6 +1034,27 @@ def test_vdot(ctx_factory, a_shape, b_shape, a_dtype, b_dtype):
     np.testing.assert_allclose(np_result, pt_result, rtol=1e-6)
 
 
+def test_reduction_adds_deps(ctx_factory):
+    from numpy.random import default_rng
+
+    ctx = ctx_factory()
+    queue = cl.CommandQueue(ctx)
+
+    rng = default_rng()
+    x_in = rng.random(10)
+    x = pt.make_data_wrapper(x_in)
+    y = 2*x
+    z = pt.sum(y)
+    pt_prg = pt.generate_loopy({"y": y, "z": z})
+
+    assert ("y_store"
+            in pt_prg.program.default_entrypoint.id_to_insn["z_store"].depends_on)
+
+    _, out_dict = pt_prg(queue)
+    np.testing.assert_allclose(np.sum(2*x_in),
+                               out_dict["z"])
+
+
 if __name__ == "__main__":
     if len(sys.argv) > 1:
         exec(sys.argv[1])