!11783 unify SliceGrad's mindir

From: @yuchaojie
Reviewed-by: @kingxian,@zhoufeng54
Signed-off-by: @kingxian

mindspore/ccsrc/backend/optimizer/ascend/mindir/slice_grad_unify_mindir.cc

@@ -0,0 +1,90 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "backend/optimizer/ascend/mindir/slice_grad_unify_mindir.h"
+
+#include <vector>
+#include <memory>
+#include <string>
+#include <algorithm>
+
+#include "utils/utils.h"
+#include "utils/ms_context.h"
+#include "backend/optimizer/common/helper.h"
+#include "runtime/device/kernel_info.h"
+#include "backend/session/anf_runtime_algorithm.h"
+
+namespace mindspore {
+namespace opt {
+namespace {
+constexpr size_t kSliceGradInputNum = 4;
+
+std::vector<int64_t> GetInputXShape(const AnfNodePtr &node) {
+  MS_EXCEPTION_IF_NULL(node);
+  std::vector<int64_t> shapes;
+  auto shape_size_t = AnfAlgo::GetPrevNodeOutputInferShape(node, 1);
+  std::transform(shape_size_t.begin(), shape_size_t.end(), std::back_inserter(shapes), SizeToLong);
+  return shapes;
+}
+
+std::vector<int64_t> GetTupleValue(const AnfNodePtr &node) {
+  MS_EXCEPTION_IF_NULL(node);
+  auto value_node = node->cast<ValueNodePtr>();
+  MS_EXCEPTION_IF_NULL(value_node);
+  MS_EXCEPTION_IF_NULL(value_node->value());
+  return GetValue<std::vector<int64_t>>(value_node->value());
+}
+}  // namespace
+
+const BaseRef SliceGradUnifyMindIR::DefinePattern() const {
+  VarPtr X1 = std::make_shared<Var>();
+  VarPtr X2 = std::make_shared<Var>();
+  VarPtr X3 = std::make_shared<Var>();
+  VarPtr X4 = std::make_shared<Var>();
+  VectorRef slice_grad({std::make_shared<Primitive>("SliceGrad"), X1, X2, X3, X4});
+  return slice_grad;
+}
+
+const AnfNodePtr SliceGradUnifyMindIR::Process(const FuncGraphPtr &graph, const AnfNodePtr &node,
+                                               const EquivPtr &) const {
+  MS_EXCEPTION_IF_NULL(graph);
+  MS_EXCEPTION_IF_NULL(node);
+
+  auto slice_grad = CheckAnfNodeIfCNodeAndInputSize(node, kSliceGradInputNum + 1);
+  std::vector<AnfNodePtr> pad_inputs = {NewValueNode(std::make_shared<Primitive>(kPadOpName)), slice_grad->input(1)};
+  auto pad = graph->NewCNode(pad_inputs);
+  MS_EXCEPTION_IF_NULL(pad);
+  pad->set_scope(slice_grad->scope());
+  pad->set_abstract(slice_grad->abstract());
+
+  // set attr paddings
+  auto x_shape = GetInputXShape(slice_grad);
+  auto begins = GetTupleValue(slice_grad->input(3));
+  auto sizes = GetTupleValue(slice_grad->input(4));
+  if (x_shape.size() != begins.size() || begins.size() != sizes.size()) {
+    MS_LOG(EXCEPTION) << "For SliceGrad, x's shape dim number should be equal to len(begin) and len(size).";
+  }
+  std::vector<std::vector<int64_t>> paddings;
+  for (size_t i = 0; i < x_shape.size(); ++i) {
+    paddings.emplace_back(std::vector<int64_t>{begins[i], x_shape[i] - begins[i] - sizes[i]});
+  }
+  AnfAlgo::SetNodeAttr(kAttrPaddings, MakeValue(paddings), pad);
+  AnfAlgo::SetNodeAttr(kAttrInputNames, MakeValue(std::vector<std::string>{"x"}), pad);
+
+  return pad;
+}
+}  // namespace opt
+}  // namespace mindspore

mindspore/ccsrc/backend/optimizer/ascend/mindir/slice_grad_unify_mindir.h

@@ -0,0 +1,33 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_BACKEND_OPTIMIZER_ASCEND_MINDIR_SLICE_GRAD_UNIFY_MINDIR_H_
+#define MINDSPORE_CCSRC_BACKEND_OPTIMIZER_ASCEND_MINDIR_SLICE_GRAD_UNIFY_MINDIR_H_
+
+#include <memory>
+#include "backend/optimizer/common/optimizer.h"
+
+namespace mindspore {
+namespace opt {
+class SliceGradUnifyMindIR : public PatternProcessPass {
+ public:
+  explicit SliceGradUnifyMindIR(bool multigraph = true) : PatternProcessPass("slice_grad_unify_mindir", multigraph) {}
+  ~SliceGradUnifyMindIR() override = default;
+  const BaseRef DefinePattern() const override;
+  const AnfNodePtr Process(const FuncGraphPtr &, const AnfNodePtr &, const EquivPtr &) const override;
+};
+}  // namespace opt
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_BACKEND_OPTIMIZER_ASCEND_MINDIR_SLICE_GRAD_UNIFY_MINDIR_H_

mindspore/ccsrc/backend/session/ascend_session.cc

@@ -38,6 +38,7 @@
 #include "backend/optimizer/ascend/mindir/maxpool_with_argmax_unify_mindir.h"
 #include "backend/optimizer/ascend/mindir/conv2d_unify_mindir.h"
 #include "backend/optimizer/ascend/mindir/sparse_softmax_cross_entropy_with_logits_unify_mindir.h"
+#include "backend/optimizer/ascend/mindir/slice_grad_unify_mindir.h"
 #include "runtime/device/kernel_adjust.h"
 #include "runtime/device/ascend/ascend_stream_assign.h"
 #include "backend/session/anf_runtime_algorithm.h"
@@ -214,6 +215,7 @@ void AscendSession::UnifyMindIR(const KernelGraphPtr &graph) {
   unify_mindir_pm->AddPass(std::make_shared<opt::Conv2DUnifyMindIR>());
   unify_mindir_pm->AddPass(std::make_shared<opt::Conv2DBackpropInputUnifyMindIR>());
   unify_mindir_pm->AddPass(std::make_shared<opt::Conv2DBackpropFilterUnifyMindIR>());
+  unify_mindir_pm->AddPass(std::make_shared<opt::SliceGradUnifyMindIR>());
   auto ms_context = MsContext::GetInstance();
   MS_EXCEPTION_IF_NULL(ms_context);
   if (ms_context->get_param<int>(MS_CTX_EXECUTION_MODE) == kGraphMode) {

mindspore/ops/_grad/grad_array_ops.py

@@ -1,4 +1,4 @@
-# Copyright 2020 Huawei Technologies Co., Ltd
+# Copyright 2020-2021 Huawei Technologies Co., Ltd
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -339,15 +339,9 @@ def get_bprop_slice(self):
     """Generate bprop for Slice"""
 
     def bprop(x, begin, size, out, dout):
-        dx = P.Pad(_slice_grad_pad(begin, size, shape_op(x)))(dout)
+        dx = G.SliceGrad()(dout, x, begin, size)
         return (dx, zeros_like(begin), zeros_like(size))
 
-    def bprop_grad(x, begin, size, out, dout):
-        dx = dx = G.SliceGrad()(dout, x, begin, size)
-        return (dx, zeros_like(begin), zeros_like(size))
-
-    if context.get_context('device_target') == "GPU" or context.get_context('device_target') == "CPU":
-        return bprop_grad
     return bprop