support bprop for const in pynative and develop stridedslice and isinstance.

mindspore/_extends/parse/standard_method.py

@@ -132,7 +132,9 @@ def while_cond(x):
 @constexpr
 def check_type_same(x_type, base_type):
     """Check x_type is same as base_type."""
-    return mstype.issubclass_(x_type, base_type)
+    if mstype.issubclass_(x_type, base_type):
+        return True
+    raise TypeError(f"The arg 'x' should be a {base_type}, but got {x_type}.")
 
 
 @constexpr

mindspore/ccsrc/pipeline/pynative/pynative_execute.cc

@@ -915,8 +915,8 @@ void PynativeExecutor::EndGraphInner(const py::object &cell, const py::object &o
       cnode->set_inputs(args);
       set_obj_node_map(curr_g_, out_id, cnode);
     } else {
-      MS_LOG(ERROR) << "Graph has no this out: " << out_id;
-      return;
+      MS_LOG(DEBUG) << "Set ValueNode as output for graph, out id: " << out_id;
+      MakeValueNode(out, out_id);
     }
   }
   EndGraphByOutId(out_id, cell, out, args);

mindspore/ops/operations/array_ops.py

@@ -1957,7 +1957,7 @@ def _compute_slicing_length(begin, end, stride, x_shape, i):
             if begin >= x_dim:
                 # When slicing backward, if begin >= x_dim, set begin = -1, which means start from the last element.
                 begin = -1
-            if 0 < end < x_dim:
+            if 0 <= end < x_dim:
                 end += -x_dim
             if end < -x_dim - 1:
                 # When slicing backward, if end < -x_dim - 1, set end = -x_dim - 1, which means