!13172 [MSLITE] Fix bug of reduce.

From: @wang_shaocong
Reviewed-by: 
Signed-off-by:

mindspore/lite/nnacl/infer/reduce_infer.c

@@ -16,6 +16,39 @@
 
 #include "nnacl/infer/reduce_infer.h"
 
+int ReduceOnAllAxes(const TensorC *input, TensorC *output, int *out_shape, size_t out_shape_size, bool keep_dims) {
+  if (keep_dims) {
+    for (size_t i = 0; i < input->shape_size_; i++) {
+      ShapePush(out_shape, &out_shape_size, 1);
+    }
+  }
+  SetShapeArray(output, out_shape, out_shape_size);
+  output->data_type_ = input->data_type_;
+  return NNACL_OK;
+}
+
+int ReduceOnSelectedAxes(const TensorC *input, size_t num_axes, int *actual_axes, TensorC *output, int *out_shape,
+                         size_t out_shape_size, bool keep_dims) {
+  for (size_t i = 0; i < input->shape_size_; i++) {
+    bool reduce_axis = false;
+    for (size_t idx = 0; idx < num_axes; ++idx) {
+      if ((size_t)(actual_axes[idx]) == i || (size_t)(actual_axes[idx] + input->shape_size_) == i) {
+        reduce_axis = true;
+        break;
+      }
+    }
+    if (reduce_axis) {
+      if (keep_dims) {
+        ShapePush(out_shape, &out_shape_size, 1);
+      }
+    } else {
+      ShapePush(out_shape, &out_shape_size, input->shape_[i]);
+    }
+  }
+  SetShapeArray(output, out_shape, out_shape_size);
+  return NNACL_OK;
+}
+
 int ReduceInferShape(const TensorC *const *inputs, size_t inputs_size, TensorC **outputs, size_t outputs_size,
                      OpParameter *parameter) {
 #ifdef Debug
@@ -37,6 +70,9 @@ int ReduceInferShape(const TensorC *const *inputs, size_t inputs_size, TensorC *
   size_t out_shape_size = 0;
   // get axes from input tensor
   const TensorC *axes_input = inputs[1];
+  if (axes_input->shape_size_ == 1 && axes_input->shape_[0] == 0) {
+    return ReduceOnAllAxes(input, output, out_shape, out_shape_size, keep_dims);
+  }
   int *axes = (int *)axes_input->data_;
   if (axes == NULL) {
     return NNACL_NULL_PTR;
@@ -70,32 +106,8 @@ int ReduceInferShape(const TensorC *const *inputs, size_t inputs_size, TensorC *
   }
   // reduce on all axes
   if (num_axes == 0) {
-    if (keep_dims) {
-      for (size_t i = 0; i < input->shape_size_; i++) {
-        ShapePush(out_shape, &out_shape_size, 1);
-      }
-    }
-    SetShapeArray(output, out_shape, out_shape_size);
-    output->data_type_ = input->data_type_;
-    return NNACL_OK;
+    return ReduceOnAllAxes(input, output, out_shape, out_shape_size, keep_dims);
   }
   // reduce on selected axes
-  for (size_t i = 0; i < input->shape_size_; i++) {
-    bool reduce_axis = false;
-    for (size_t idx = 0; idx < num_axes; ++idx) {
-      if ((size_t)(actual_axes[idx]) == i || (size_t)(actual_axes[idx] + input->shape_size_) == i) {
-        reduce_axis = true;
-        break;
-      }
-    }
-    if (reduce_axis) {
-      if (keep_dims) {
-        ShapePush(out_shape, &out_shape_size, 1);
-      }
-    } else {
-      ShapePush(out_shape, &out_shape_size, input->shape_[i]);
-    }
-  }
-  SetShapeArray(output, out_shape, out_shape_size);
-  return NNACL_OK;
+  return ReduceOnSelectedAxes(input, num_axes, actual_axes, output, out_shape, out_shape_size, keep_dims);
 }