[Dy2stat]Fix bug with static_convert_var_shape in locals scope (#31556)

* Fix bug with static_convert_var_shape

* replace dot with dash

python/paddle/fluid/dygraph/dygraph_to_static/convert_operators.py

@@ -302,19 +302,19 @@ def convert_var_shape_simple(x):
         return x.shape
 
 
-def eval_if_exist_else_none(name, local_symbol_table):
+def eval_if_exist_else_none(name, global_symbol_table):
     """
     Args:
         name([str]): Expression passed into `eval`.
-        local_symbol_table(dict): Specified from `locals()`. DO NOT use `globals()`,
-                                  it has a higher priority and will hide away variables
-                                  from `locals()`.
+        local_symbol_table(dict): Specified from `globals()`. DO NOT use `locals()`,
+                                  because all STATIC_CONVERT_VAR_SHAPE_SUFFIX vars is
+                                  declared with keyword `global`.
     
     Returns:
-        Return the variable if found in local_symbol_table else None.
+        Return the variable if found in global_symbol_table else None.
     """
     try:
-        return eval(name, local_symbol_table)
+        return eval(name, global_symbol_table)
     except:
         return None
 

python/paddle/fluid/dygraph/dygraph_to_static/tensor_shape_transformer.py

@@ -59,7 +59,7 @@ def create_convert_shape_node(var_shape_node,
 
 
 def create_choose_shape_node(attr_shape_name, api_shape_name, slice_node=None):
-    eval_exist_func = "paddle.jit.dy2static.eval_if_exist_else_none('{}', locals())".format(
+    eval_exist_func = "paddle.jit.dy2static.eval_if_exist_else_none('{}', globals())".format(
         api_shape_name)
     args = [attr_shape_name, eval_exist_func]
 
@@ -293,6 +293,10 @@ class TensorShapeTransformer(gast.NodeTransformer):
         return False
 
     def _update_name_to_var_shape(self, node):
+        def replace_dot(name):
+            # replace all '.' into '_'
+            return name.replace('.', '_')
+
         assert isinstance(node, gast.Assign)
         target_node = node.targets[0]
         value_node = node.value
@@ -307,7 +311,8 @@ class TensorShapeTransformer(gast.NodeTransformer):
                     if value_node.id in self.name_to_var_shape:
                         # TODO(zhhsplendid): is context a problem for the result node of gast.parse?
                         static_shape_var_name = unique_name.generate(
-                            target_id + STATIC_CONVERT_VAR_SHAPE_SUFFIX)
+                            replace_dot(target_id) +
+                            STATIC_CONVERT_VAR_SHAPE_SUFFIX)
                         static_shape_var_node = gast.parse(
                             static_shape_var_name).body[0].value
 
@@ -328,7 +333,8 @@ class TensorShapeTransformer(gast.NodeTransformer):
                 if isinstance(value_node, gast.Attribute):
                     if self._is_var_shape(value_node):  # eg: x.shape
                         static_shape_var_name = unique_name.generate(
-                            target_id + STATIC_CONVERT_VAR_SHAPE_SUFFIX)
+                            replace_dot(target_id) +
+                            STATIC_CONVERT_VAR_SHAPE_SUFFIX)
                         static_shape_var_node = gast.parse(
                             static_shape_var_name).body[0].value
 
@@ -341,6 +347,12 @@ class TensorShapeTransformer(gast.NodeTransformer):
                             ast_to_source_code(static_shape_value_node).strip(),
                             idx)
                         sub_node = gast.parse(sub_node_str).body[0].value
+                        # Note(Aurelius84): Becuase static_shape_var_name is used in
+                        # eval_if_exist_else_none() as plain string, so it will not 
+                        # be pasred as argument in convert_loop/ifelse. We delcare it
+                        # as global var because it has unique name.
+                        update_static_shape_var_node.append(
+                            gast.Global(names=[static_shape_var_name]))
 
                         update_static_shape_var_node.append(
                             gast.Assign(
@@ -354,7 +366,8 @@ class TensorShapeTransformer(gast.NodeTransformer):
             if isinstance(value_node, gast.Name):
                 if value_node.id in self.name_to_var_shape:
                     static_shape_var_name = unique_name.generate(
-                        target_id + STATIC_CONVERT_VAR_SHAPE_SUFFIX)
+                        replace_dot(target_id) +
+                        STATIC_CONVERT_VAR_SHAPE_SUFFIX)
                     static_shape_var_node = gast.parse(
                         static_shape_var_name).body[0].value
                     static_shape_value_name = self.name_to_var_shape[
@@ -370,17 +383,20 @@ class TensorShapeTransformer(gast.NodeTransformer):
                     self.name_to_var_shape[target_id] = static_shape_var_name
             elif self._is_var_shape(value_node):  # eg: x.shape or x.shape[0]
                 static_shape_var_name = unique_name.generate(
-                    target_id + STATIC_CONVERT_VAR_SHAPE_SUFFIX)
+                    replace_dot(target_id) + STATIC_CONVERT_VAR_SHAPE_SUFFIX)
                 static_shape_var_node = gast.parse(static_shape_var_name).body[
                     0].value
                 static_shape_value_node = copy.deepcopy(value_node)
                 # x.shape becomes convert_var_shape_simple(x)
                 static_shape_value_node = ShapeAttributeTransformer().visit(
                     static_shape_value_node)
+                # Declare static_shape_var_name as global var
                 update_static_shape_var_node = [
+                    gast.Global(names=[static_shape_var_name])
+                ]
+                update_static_shape_var_node.append(
                     gast.Assign(
                         targets=[static_shape_var_node],
-                        value=static_shape_value_node)
-                ]
+                        value=static_shape_value_node))
                 self.name_to_var_shape[target_id] = static_shape_var_name
         return update_static_shape_var_node

python/paddle/fluid/tests/unittests/dygraph_to_static/test_convert_operators.py

@@ -191,29 +191,44 @@ class TestChooseShapeAttrOrApi(unittest.TestCase):
 
 
 class TestEvaIfExistElseNone(unittest.TestCase):
-    def test_locals(self):
+    def test_globals(self):
+        global x_shape
         x_shape = [1, 2, 3]
-        self.assertEqual(eval_if_exist_else_none('x_shape', locals()), x_shape)
+        self.assertEqual(eval_if_exist_else_none('x_shape', locals()), None)
+        self.assertEqual(eval_if_exist_else_none('x_shape', globals()), x_shape)
 
-    def test_globals(self):
+        del x_shape
+
+    def test_enclosing_scope(self):
+        global x_shape
         x_shape = [1, 2, 3]
 
         def foo():
-            x_shape = [2, 3, 4]
+            y_shape = [2, 3, 4]
+            self.assertEqual(
+                eval_if_exist_else_none('x_shape', globals()), [1, 2, 3])
             self.assertEqual(
-                eval_if_exist_else_none('x_shape', locals()), [2, 3, 4])
+                eval_if_exist_else_none('y_shape', locals()), [2, 3, 4])
 
         foo()
+        del x_shape
 
-    def test_invisible_of_func(self):
+    def test_global_in_func(self):
         x_shape = [1, 2, 3]
 
         def foo():
-            x_shape = [2, 3, 4]
-            return x_shape
+            global y_shape
+            y_shape = [2, 3, 4]
 
             self.assertEqual(
-            eval_if_exist_else_none('x_shape', locals()), [1, 2, 3])
+                eval_if_exist_else_none('y_shape', globals()), [2, 3, 4])
+            self.assertEqual(eval_if_exist_else_none('x_shape', locals()), None)
+            self.assertEqual(
+                eval_if_exist_else_none('x_shape', globals()), None)
+
+            del y_shape
+
+        foo()
 
     def test_none(self):
         def foo():

python/paddle/fluid/tests/unittests/dygraph_to_static/test_tensor_shape.py

@@ -541,5 +541,27 @@ class TestChangeShapeAfterAssign(TestTensorShapeBasic):
         self.expected_slice_op_num = 2
 
 
+def dyfunc_with_static_convert_var_shape(x):
+    # Note: this will create `batch_size__static_convert_var_shape_suffix_0` firstly.
+    batch_size = x.shape[0]
+    if len(x.shape) < 1:
+        res = x
+    else:
+        # Test for correctly to find `batch_size__static_convert_var_shape_suffix_0` in
+        # deeply nested scope.
+        res = fluid.layers.fill_constant(
+            value=8, shape=[batch_size], dtype="int32")
+
+    return res
+
+
+class TestFindStatiConvertVarShapeSuffixVar(unittest.TestCase):
+    def test(self):
+        x_spec = paddle.static.InputSpec(shape=[None, 10])
+        func = paddle.jit.to_static(dyfunc_with_if_2, input_spec=[x_spec])
+        # Call this function to trigger program translation.
+        func.concrete_program
+
+
 if __name__ == '__main__':
     unittest.main()