Add test value during opt.

theano/tensor/opt.py

@@ -4600,8 +4600,12 @@ def local_elemwise_fusion_op(OP, max_input_fct=lambda node: 1024):
                         elif ii in tmp_input:
                             tmp_s_input.append(tmp_scalar[tmp_input.index(ii)])
                         else:
-                            tmp_s_input.append(scalar.Scalar(
-                                    ii.dtype).make_variable())
+                            tmp = scalar.Scalar(ii.dtype).make_variable()
+                            try:
+                                tmp.tag.test_value = gof.op.get_test_value(ii).flatten()[0]
+                            except AttributeError:
+                                pass
+                            tmp_s_input.append(tmp)
                             tmp_input.append(ii)
                             tmp_scalar.append(tmp_s_input[-1])
                     s_op = i.owner.op.scalar_op(*tmp_s_input)
@@ -4651,6 +4655,11 @@ def local_elemwise_fusion_op(OP, max_input_fct=lambda node: 1024):
                     s = s_inputs[inputs.index(i)]
                 else:
                     s = scalar.Scalar(i.dtype).make_variable()
+                    try:
+                        s.tag.test_value = gof.op.get_test_value(i).flatten()[0]
+                    except AttributeError:
+                        pass
+
                     inputs.append(i)
                     s_inputs.append(s)
                 s_g.append(s)