1 files changed, 81 insertions, 0 deletions
diff --git a/compiler/mir/src/ops/SqueezeOp.cpp b/compiler/mir/src/ops/SqueezeOp.cpp
new file mode 100644
index 000000000..63f7d43f3
--- /dev/null
+++ b/compiler/mir/src/ops/SqueezeOp.cpp
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * 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 "mir/ops/SqueezeOp.h"
+
+namespace mir
+{
+namespace ops
+{
+
+void SqueezeOp::inferOutputTypes()
+{
+  assert(getNumInputs() == 1);
+
+  const auto &input_shape = getInputShape(0);
+  auto dt = getInput(0)->getElementType();
+  int32_t input_rank = input_shape.rank();
+
+  std::vector<int32_t> dims_to_squeeze;
+
+  if (getNumSqueezeDims() == 0)
+  {
+    for (int32_t i = 0; i < input_rank; ++i)
+    {
+      if (input_shape.dim(i) == 1)
+      {
+        dims_to_squeeze.push_back(i);
+      }
+    }
+  }
+  else
+  {
+    dims_to_squeeze = getDimsToSqueeze();
+    sort(dims_to_squeeze.begin(), dims_to_squeeze.end());
+    dims_to_squeeze.erase(unique(dims_to_squeeze.begin(), dims_to_squeeze.end()),
+                          dims_to_squeeze.end());
+  }
+
+  if (dims_to_squeeze.size() == static_cast<size_t>(input_rank))
+  {
+    // Input shape have 1s in all dimensions, output shape is (1,)
+    setOutputType(0, {dt, Shape{1}});
+    return;
+  }
+
+  int32_t output_rank = 0;
+  size_t squeezing_idx = 0;
+  Shape output_shape(input_rank - dims_to_squeeze.size());
+  for (int32_t i = 0; i < input_rank; ++i)
+  {
+    if (squeezing_idx < dims_to_squeeze.size() && i == dims_to_squeeze[squeezing_idx])
+    {
+      if (input_shape.dim(i) != 1)
+        throw std::invalid_argument("All squeezed dimensions should have size 1");
+
+      squeezing_idx++;
+    }
+    else
+    {
+      output_shape.dim(output_rank++) = input_shape.dim(i);
+    }
+  }
+
+  setOutputType(0, {dt, output_shape});
+}
+
+} // namespace ops
+} // namespace mir