solve the failed test case local_mul_switch_local, by register local_elemwise_alloc to canonicalize

theano/tensor/opt.py

@@ -2031,6 +2031,11 @@ local_elemwise_alloc = register_specialize(
         local_elemwise_alloc_op(T.Elemwise, T.Alloc, T.DimShuffle)),
     'local_alloc_elemwise')
 
+local_elemwise_alloc = register_canonicalize(
+    gof.local_optimizer([T.Elemwise])(
+        local_elemwise_alloc_op(T.Elemwise, T.Alloc, T.DimShuffle)),
+    'local_alloc_elemwise')
+
 theano.configparser.AddConfigVar('experimental.local_alloc_elemwise',
                                  "DEPRECATED: If True, enable the experimental"
                                  " optimization local_alloc_elemwise."

theano/tensor/tests/test_opt.py

@@ -4078,6 +4078,7 @@ class T_local_switch_sink(unittest.TestCase):
 
         self.mode = theano.compile.mode.get_default_mode().including(
                 'canonicalize', 'fast_run').excluding('gpu', 'fusion')
+        theano.config.experimental.local_alloc_elemwise_assert = False
         self.mode = copy.copy(self.mode)
         self.mode.check_isfinite = False