[cherry-pick #20521] (#20590)

1. fill_constant support Tensor;
2. fix bug in backward.py: using fill_constant instead of fill_constant_batch_size_like
3. fix bug in ExpandGradOp.
test=release/1.6 (#20521)

paddle/fluid/operators/expand_op.cc

@@ -31,7 +31,6 @@ class ExpandOp : public framework::OperatorWithKernel {
     PADDLE_ENFORCE_EQ(ctx->HasInput("X"), true, "Input(X) should not be null.");
     PADDLE_ENFORCE_EQ(ctx->HasOutput("Out"), true,
                       "Output(Out) should not be null.");
-
     auto x_dims = ctx->GetInputDim("X");
     auto expand_times = ctx->Attrs().Get<std::vector<int>>("expand_times");
 
@@ -162,12 +161,15 @@ class ExpandGradOp : public framework::OperatorWithKernel {
       if (expand_times[i] == -1) {
         continue;
       } else {
-        PADDLE_ENFORCE_EQ(x_dims[i] * expand_times[i], out_dims[i],
+        if (ctx->IsRuntime()) {
+          PADDLE_ENFORCE_EQ(
+              x_dims[i] * expand_times[i], out_dims[i],
               "Each dimension size of Input(Out@GRAD) should be "
               "equal to multiplication of crroresponding dimension "
               "size of Input(X) and Attr(expand_times) value.");
         }
       }
+    }
     auto x_grad_name = framework::GradVarName("X");
 
     if (ctx->HasOutput(x_grad_name)) {

paddle/fluid/operators/fill_constant_op.cc

@@ -13,7 +13,7 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/operators/fill_constant_op.h"
-
+#include <string>
 namespace paddle {
 namespace operators {
 
@@ -22,9 +22,22 @@ class FillConstantOp : public framework::OperatorWithKernel {
   using framework::OperatorWithKernel::OperatorWithKernel;
 
   void InferShape(framework::InferShapeContext* ctx) const override {
-    PADDLE_ENFORCE(ctx->HasOutput("Out"),
+    PADDLE_ENFORCE_EQ(ctx->HasOutput("Out"), true,
                       "Output(Out) of FillConstantOp should not be null.");
+
     auto& shape = ctx->Attrs().Get<std::vector<int64_t>>("shape");
+
+    if (shape.empty() && ctx->HasInput("ShapeTensor")) {
+      auto shape_dims = ctx->GetInputDim("ShapeTensor");
+      int num_ele = 1;
+      for (int i = 0; i < shape_dims.size(); ++i) {
+        num_ele *= shape_dims[i];
+      }
+      auto vec_dims = std::vector<int>(num_ele, -1);
+      ctx->SetOutputDim("Out", framework::make_ddim(vec_dims));
+
+      return;
+    }
     ctx->SetOutputDim("Out", framework::make_ddim(shape));
   }
 
@@ -35,6 +48,16 @@ class FillConstantOp : public framework::OperatorWithKernel {
         framework::proto::VarType::Type(ctx.Attr<int>("dtype")),
         ctx.GetPlace());
   }
+
+  framework::OpKernelType GetKernelTypeForVar(
+      const std::string& var_name, const Tensor& tensor,
+      const framework::OpKernelType& expected_kernel_type) const override {
+    if (var_name == "ShapeTensor" || var_name == "ShapeTensorList") {
+      return expected_kernel_type;
+    }
+    return framework::OpKernelType(expected_kernel_type.data_type_,
+                                   tensor.place(), tensor.layout());
+  }
 };
 
 class FillConstantOpVarTypeInference : public framework::VarTypeInference {
@@ -55,7 +78,18 @@ class FillConstantOpMaker : public framework::OpProtoAndCheckerMaker {
                  "Output data type")
         .SetDefault(framework::proto::VarType::FP32);
     AddAttr<std::vector<int64_t>>("shape",
-                                  "(vector<int64_t>) The shape of the output");
+                                  "(vector<int64_t>) The shape of the output")
+        .SetDefault({});
+    AddInput("ShapeTensor",
+             "(Tensor<int>), optional). The shape of the output."
+             "It has a higher priority than Attr(shape).")
+        .AsDispensable();
+    AddInput("ShapeTensorList",
+             "(vector<Tensor<int>>, optional). The shape of the output. "
+             "It has a higher priority than Attr(shape)."
+             "The shape of the element in vector must be [1].")
+        .AsDuplicable()
+        .AsDispensable();
     AddAttr<float>("value", "(float, default 0) The value to be filled")
         .SetDefault(0.0f);
     AddAttr<bool>("force_cpu",

paddle/fluid/operators/fill_constant_op.h

@@ -22,6 +22,53 @@ limitations under the License. */
 
 namespace paddle {
 namespace operators {
+
+using Tensor = framework::Tensor;
+
+inline framework::DDim GetShape(const framework::ExecutionContext &ctx) {
+  // 1. shape is a Tensor
+  if (ctx.HasInput("ShapeTensor")) {
+    auto *shape_tensor = ctx.Input<framework::LoDTensor>("ShapeTensor");
+    auto *shape_data = shape_tensor->data<int>();
+    framework::Tensor cpu_shape_tensor;
+    if (platform::is_gpu_place(shape_tensor->place())) {
+      TensorCopySync(*shape_tensor, platform::CPUPlace(), &cpu_shape_tensor);
+      shape_data = cpu_shape_tensor.data<int>();
+    }
+    auto vec_shape =
+        std::vector<int>(shape_data, shape_data + shape_tensor->numel());
+    return framework::make_ddim(vec_shape);
+  }
+
+  // 2. shape is a list/tuple containing Tensor
+  auto shape_tensor_list = ctx.MultiInput<framework::Tensor>("ShapeTensorList");
+  if (shape_tensor_list.size() > 0) {
+    std::vector<int> vec_shape;
+    for (size_t i = 0; i < shape_tensor_list.size(); ++i) {
+      auto tensor = shape_tensor_list[i];
+      PADDLE_ENFORCE_EQ(
+          tensor->dims(), framework::make_ddim({1}),
+          "ShapeError: If the element type of 'shape' in FillConstantOp is "
+          "Tensor, "
+          "the element's shape must be [1]. But received the element's shape "
+          "is [%s]",
+          tensor->dims());
+      if (platform::is_gpu_place(tensor->place())) {
+        framework::Tensor temp;
+        TensorCopySync(*tensor, platform::CPUPlace(), &temp);
+        vec_shape.push_back(*temp.data<int>());
+      } else {
+        vec_shape.push_back(*tensor->data<int>());
+      }
+    }
+    return framework::make_ddim(vec_shape);
+  }
+
+  // 3. shape is a list/tuple without containing Tensor
+  auto vec_shape = ctx.Attr<std::vector<int64_t>>("shape");
+  return framework::make_ddim(vec_shape);
+}
+
 template <typename T>
 class FillConstantKernel : public framework::OpKernel<T> {
  public:
@@ -35,14 +82,14 @@ class FillConstantKernel : public framework::OpKernel<T> {
 
     framework::Variable *out_var = ctx.OutputVar("Out");
 
+    auto shape = GetShape(ctx);
+
     if (out_var->IsType<framework::LoDTensor>()) {
       tensor = out_var->GetMutable<framework::LoDTensor>();
-      tensor->Resize(
-          framework::make_ddim(ctx.Attr<std::vector<int64_t>>("shape")));
+      tensor->Resize(shape);
     } else if (out_var->IsType<framework::SelectedRows>()) {
       tensor = out_var->GetMutable<framework::SelectedRows>()->mutable_value();
-      tensor->Resize(
-          framework::make_ddim(ctx.Attr<std::vector<int64_t>>("shape")));
+      tensor->Resize(shape);
     } else {
       PADDLE_THROW(
           "fill constant op's output only"

python/paddle/fluid/backward.py

@@ -23,7 +23,7 @@ import logging
 from .. import compat as cpt
 from . import unique_name
 from . import log_helper
-
+import paddle.fluid
 __all__ = [
     'append_backward',
     'gradients',
@@ -1247,15 +1247,15 @@ def calc_gradient(targets, inputs, target_gradients=None, no_grad_set=None):
         target = targets[i]
         if grad is None:
             grad_name = _append_grad_suffix_(target.name)
-            op_desc = _create_op_desc_("fill_constant_batch_size_like",
-                                       {"Input": [target.name]},
+            target_shape = paddle.fluid.layers.shape(target)
+            op_desc = _create_op_desc_("fill_constant",
+                                       {"ShapeTensor": [target_shape.name]},
                                        {"Out": [grad_name]}, {
-                                           "shape": target.shape,
+                                           "shape": [],
                                            "value": 1.0,
                                            "dtype": target.dtype,
-                                           'input_dim_idx': 0,
-                                           'output_dim_idx': 0
                                        })
+
             block.desc.append_op().copy_from(op_desc)
             input_grad_names_set.add(grad_name)
         else:

python/paddle/fluid/layers/tensor.py

@@ -479,7 +479,6 @@ def fill_constant(shape, dtype, value, force_cpu=False, out=None):
           data2 = fluid.layers.fill_constant(shape=[2,1], value=5, dtype='int64', out=data1) 
           #data1=[[5], [5]] data2=[[5], [5]]
     """
-
     helper = LayerHelper("fill_constant", **locals())
     if convert_dtype(dtype) not in [
             'bool', 'float16', 'float32', 'float64', 'int32', 'int64'
@@ -488,6 +487,56 @@ def fill_constant(shape, dtype, value, force_cpu=False, out=None):
             "The create data type in fill_constant must be one of 'bool', float16, float32,"
             "float64, int32 or int64, but received %s." % convert_dtype(
                 (dtype)))
+
+    if not isinstance(shape, (list, tuple, Variable)):
+        raise TypeError(
+            "The type of 'shape' in fill_constant must be Variable, list or tuple, but "
+            "received %s." % (type(shape)))
+
+    inputs = {}
+    attrs = {
+        'value': float(value),
+        'force_cpu': force_cpu or force_init_on_cpu()
+    }
+
+    def _contain_var(one_list):
+        for ele in one_list:
+            if isinstance(ele, Variable):
+                return True
+        return False
+
+    def _get_attr_shape(list_shape):
+        attr_shape = []
+        for idx, dim in enumerate(list_shape):
+            if isinstance(dim, Variable):
+                attr_shape.append(-1)
+            else:
+                attr_shape.append(dim)
+        return attr_shape
+
+    def _get_shape_tensor(list_shape):
+        new_shape_tensor = []
+        for dim in list_shape:
+            if isinstance(dim, Variable):
+                dim.stop_gradient = True
+                new_shape_tensor.append(dim)
+            else:
+                temp_out = helper.create_variable_for_type_inference('int32')
+                fill_constant([1], 'int32', dim, force_cpu=True, out=temp_out)
+                new_shape_tensor.append(temp_out)
+        return new_shape_tensor
+
+    if isinstance(shape, Variable):
+        shape.stop_gradient = True
+        inputs["ShapeTensor"] = shape
+    elif isinstance(shape, (list, tuple)):
+        assert len(shape) > 0, (
+            "The size of 'shape' in fill_constant can't be zero, "
+            "but received %s." % len(shape))
+        attrs["shape"] = _get_attr_shape(shape)
+        if _contain_var(shape):
+            inputs['ShapeTensorList'] = _get_shape_tensor(shape)
+
     if out is None:
         out = helper.create_variable_for_type_inference(dtype=dtype)
     else:
@@ -496,16 +545,12 @@ def fill_constant(shape, dtype, value, force_cpu=False, out=None):
                 "The create data type in op must be same with out type"
                 "but received %s and out dtype %s." % (convert_dtype(
                     (dtype), convert_dtype(out.dtype))))
+    attrs['dtype'] = out.dtype
     helper.append_op(
         type='fill_constant',
-        inputs={},
+        inputs=inputs,
         outputs={'Out': [out]},
-        attrs={
-            'shape': shape,
-            'dtype': out.dtype,
-            'value': float(value),
-            'force_cpu': force_cpu or force_init_on_cpu()
-        },
+        attrs=attrs,
         stop_gradient=True)
     out.stop_gradient = True
     return out

python/paddle/fluid/tests/unittests/test_expand_op.py

@@ -191,6 +191,8 @@ class TestExpandAPI(OpTest):
         out_2 = fluid.layers.expand(x, expand_times=[positive_2, 3])
         out_3 = fluid.layers.expand(x, expand_times=expand_times)
 
+        g0 = fluid.backward.calc_gradient(out_2, x)
+
         exe = fluid.Executor(place=fluid.CPUPlace())
         res_1, res_2, res_3 = exe.run(fluid.default_main_program(),
                                       feed={

python/paddle/fluid/tests/unittests/test_fill_constant_op.py

@@ -24,6 +24,7 @@ import paddle.fluid as fluid
 from paddle.fluid import compiler, Program, program_guard
 
 
+# Situation 1: Attr(shape) is a list(without tensor)
 class TestFillConstantOp1(OpTest):
     def setUp(self):
         '''Test fill_constant op with specified value
@@ -106,6 +107,117 @@ class TestFillConstantOpWithSelectedRows(OpTest):
             self.check_with_place(place)
 
 
+# Situation 2: Attr(shape) is a list(with tensor)
+class TestFillConstantOp1_ShapeTensorList(OpTest):
+    def setUp(self):
+        '''Test fill_constant op with specified value
+        '''
+        self.op_type = "fill_constant"
+        self.init_data()
+        shape_tensor_list = []
+        for index, ele in enumerate(self.shape):
+            shape_tensor_list.append(("x" + str(index), np.ones(
+                (1)).astype('int32') * ele))
+
+        self.inputs = {"ShapeTensorList": shape_tensor_list}
+        self.attrs = {'shape': self.infer_shape, 'value': self.value}
+        self.outputs = {'Out': np.full(self.shape, self.value)}
+
+    def init_data(self):
+        self.shape = [123, 92]
+        self.infer_shape = [-1, 92]
+        self.value = 3.8
+
+    def test_check_output(self):
+        self.check_output()
+
+
+class TestFillConstantOp2_ShapeTensorList(OpTest):
+    def setUp(self):
+        '''Test fill_constant op with default value
+        '''
+        self.op_type = "fill_constant"
+        self.init_data()
+        shape_tensor_list = []
+        for index, ele in enumerate(self.shape):
+            shape_tensor_list.append(("x" + str(index), np.ones(
+                (1)).astype('int32') * ele))
+
+        self.inputs = {"ShapeTensorList": shape_tensor_list}
+        self.attrs = {'shape': self.infer_shape}
+        self.outputs = {'Out': np.full(self.shape, 0.0)}
+
+    def init_data(self):
+        self.shape = [123, 92]
+        self.infer_shape = [-1, -1]
+
+    def test_check_output(self):
+        self.check_output()
+
+
+class TestFillConstantOp3_ShapeTensorList(TestFillConstantOp1_ShapeTensorList):
+    def init_data(self):
+        self.shape = [123, 92]
+        self.infer_shape = [123, -1]
+        self.value = 10000000000
+
+
+class TestFillConstantOp4_ShapeTensorList(TestFillConstantOp1_ShapeTensorList):
+    def init_data(self):
+        self.shape = [123, 92]
+        self.infer_shape = [123, -1]
+        self.value = 3
+
+
+# Situation 3: shape is a tensor
+class TestFillConstantOp1_ShapeTensor(OpTest):
+    def setUp(self):
+        '''Test fill_constant op with specified value
+        '''
+        self.op_type = "fill_constant"
+        self.init_data()
+
+        self.inputs = {"ShapeTensor": np.array(self.shape).astype("int32")}
+        self.attrs = {'value': self.value}
+        self.outputs = {'Out': np.full(self.shape, self.value)}
+
+    def init_data(self):
+        self.shape = [123, 92]
+        self.value = 3.8
+
+    def test_check_output(self):
+        self.check_output()
+
+
+# # Test python API
+class TestFillConstantAPI(OpTest):
+    def test_api(self):
+        positive_2 = fluid.layers.fill_constant([1], "int32", 2)
+        shape_tensor = fluid.layers.data(
+            name="shape_tensor",
+            shape=[2],
+            append_batch_size=False,
+            dtype="int32")
+
+        out_1 = fluid.layers.fill_constant(
+            shape=[1, 2], dtype="float32", value=1.1)
+        out_2 = fluid.layers.fill_constant(
+            shape=[1, positive_2], dtype="float32", value=1.1)
+
+        out_3 = fluid.layers.fill_constant(
+            shape=shape_tensor, dtype="float32", value=1.1)
+
+        exe = fluid.Executor(place=fluid.CPUPlace())
+        res_1, res_2, res_3 = exe.run(
+            fluid.default_main_program(),
+            feed={"shape_tensor": np.array([1, 2]).astype("int32")},
+            fetch_list=[out_1, out_2, out_3])
+
+        assert np.array_equal(res_1, np.full([1, 2], 1.1, dtype="float32"))
+        assert np.array_equal(res_2, np.full([1, 2], 1.1, dtype="float32"))
+        assert np.array_equal(res_3, np.full([1, 2], 1.1, dtype="float32"))
+
+
 class TestFillConstantOpError(OpTest):
     def test_errors(self):
         with program_guard(Program(), Program()):
@@ -127,6 +239,7 @@ class TestFillConstantOpError(OpTest):
             # The input dtype of fill_constant must be one of bool, float16,
             #float32, float64, int32 or int64
             x2 = fluid.layers.data(name='x2', shape=[1], dtype="int32")
+
             self.assertRaises(
                 TypeError,
                 fluid.layers.fill_constant,
@@ -141,6 +254,17 @@ class TestFillConstantOpError(OpTest):
                 dtype='float64',
                 out=x2)
 
+            # test Error of Shape
+            def test_shape_type():
+                fluid.layers.fill_constant(shape=1, dtype="float32", value=1)
+
+            self.assertRaises(TypeError, test_shape_type)
+
+            def test_shape_size():
+                fluid.layers.fill_constant(shape=[], dtype="float32", value=1)
+
+            self.assertRaises(AssertionError, test_shape_size)
+
 
 if __name__ == "__main__":
     unittest.main()