compiler: Fix #1871 (array() breaks math functions)

GitHub: Fixes #1871.

artiq/compiler/builtins.py

@@ -174,7 +174,9 @@ def fn_list():
     return types.TConstructor(TList())
 
 def fn_array():
-    return types.TConstructor(TArray())
+    # numpy.array() is actually a "magic" macro that is expanded in-place, but
+    # just as for builtin functions, we do not want to quote it, etc.
+    return types.TBuiltinFunction("array")
 
 def fn_Exception():
     return types.TExceptionConstructor(TException("Exception"))

artiq/test/coredevice/test_embedding.py

@@ -538,3 +538,19 @@ class _Alignment(EnvExperiment):
 class AlignmentTest(ExperimentCase):
     def test_tuple(self):
         self.create(_Alignment).run()
+
+
+class _NumpyQuoting(EnvExperiment):
+    def build(self):
+        self.setattr_device("core")
+
+    @kernel
+    def run(self):
+        a = np.array([10, 20])
+        b = np.sqrt(4.0)
+
+
+class NumpyQuotingTest(ExperimentCase):
+    def test_issue_1871(self):
+        """Ensure numpy.array() does not break NumPy math functions"""
+        self.create(_NumpyQuoting).run()