test/lit: Add smoke test for math function broadcasting

artiq/test/lit/embedding/array_math_fns.py

@@ -0,0 +1,15 @@
+# RUN: %python -m artiq.compiler.testbench.embedding %s
+
+from artiq.language.core import *
+import numpy as np
+
+@kernel
+def entrypoint():
+    # Just make sure everything compiles.
+    a = np.array([1.0, 2.0, 3.0])
+    b = np.sin(a)
+    assert b.shape == a.shape
+
+    c = np.array([1.0, 2.0, 3.0])
+    d = np.arctan(c)
+    assert d.shape == c.shape