temporarily fix advanced-setitem grad error (#57737)

zoooo0820 · web-flow · commit 8abb036673f9 · 2023-09-26T16:24:31.000+08:00
diff --git a/python/paddle/base/variable_index.py b/python/paddle/base/variable_index.py
@@ -956,17 +956,22 @@ def _setitem_static(x, indices, values):
             values = values.astype(transed_sub_tensor.dtype)
 
         if paddle.in_dynamic_mode():
-            return transed_sub_tensor.index_put_(
+            # NOTE(zoooo0820): directly return result instead of another set_value, after backward bug fixed.
+            transed_sub_tensor = transed_sub_tensor.index_put_(
                 adjusted_advanced_index, values
             )
         else:
             transed_sub_tensor = transed_sub_tensor.index_put(
                 adjusted_advanced_index, values
             )
 
-            transback_sub_tensor = transed_sub_tensor.transpose(transback_dim)
-            inputs["ValueTensor"] = transback_sub_tensor
+        transback_sub_tensor = transed_sub_tensor.transpose(transback_dim)
+        inputs["ValueTensor"] = transback_sub_tensor
 
+        if paddle.in_dynamic_mode():
+            x._bump_inplace_version()
+            output = x
+        else:
             helper = paddle.base.layer_helper.LayerHelper(
                 'set_value', **locals()
             )
@@ -979,20 +984,21 @@ def _setitem_static(x, indices, values):
                 output = helper.create_variable_for_type_inference(
                     dtype=x.dtype
                 )
-            cur_block = default_main_program().current_block()
-            cur_block.append_op(
-                type="set_value",
-                inputs=inputs,
-                outputs={'Out': output},
-                attrs=attrs,
-                inplace_map={"Input": "Out"},
-            )
+        cur_block = default_main_program().current_block()
+        cur_block.append_op(
+            type="set_value",
+            inputs=inputs,
+            outputs={'Out': output},
+            attrs=attrs,
+            inplace_map={"Input": "Out"},
+        )
 
+        if not paddle.in_dynamic_mode():
             # map var to the new output
             paddle.jit.api.ProgramTranslator.get_instance()._inplace_map.add(
                 cur_block.program, x.desc.id(), output
             )
-            return output
+        return output
 
 
 def get_tensor_with_basic_indexing(
diff --git a/test/indexing/test_setitem.py b/test/indexing/test_setitem.py
@@ -123,6 +123,23 @@ def test_indexing_is_multi_dim_list(self):
 
         np.testing.assert_allclose(x.numpy(), np_data)
 
+    def test_inplace_with_stride(self):
+        v = paddle.randn((3, 1))
+        v.stop_gradient = False
+        vv = v * 1
+
+        zero = paddle.randn((3, 3, 5))
+        zero.stop_gradient = False
+
+        zero1 = zero * 1
+        zero1[paddle.to_tensor([0, 1])] = vv
+
+        loss = zero1.sum()
+        loss.backward()
+
+        expected_v_grad = np.ones((3, 1)) * 10.0
+        np.testing.assert_equal(v.grad.numpy(), expected_v_grad)
+
 
 class TestSetitemInStatic(unittest.TestCase):
     def setUp(self):
