[luci] Migrate helperPads to ShapeInferenceHelper (Samsung#13862)

This PR migrates heplerPads.h to CircleShapeInferenceHelper.h and CircleShapeInferenceHelper.cpp.

ONE-DCO-1.0-Signed-off-by: JuYoung Lee rsb98759@gmail.com

Author: icodo98

compiler/luci/service/src/CircleShapeInferenceHelper.cpp

@@ -16,8 +16,12 @@
 
 #include "CircleShapeInferenceHelper.h"
 
+#include "Check.h"
+
 #include <oops/InternalExn.h>
 
+#include <limits>
+
 using namespace luci::sinf;
 
 namespace
@@ -157,5 +161,57 @@ loco::TensorShape broadcast_shape(const loco::TensorShape &x, const loco::Tensor
   return output_shape;
 }
 
+loco::TensorShape pad_shape(const loco::TensorShape &input_shape, const luci::CircleConst *paddings)
+{
+  const loco::DataType S32 = loco::DataType::S32;
+  const loco::DataType S64 = loco::DataType::S64;
+
+  // TODO support other data type
+  LUCI_ASSERT(paddings->dtype() == S32 || paddings->dtype() == S64, "Support int 32/64 for now");
+  LUCI_ASSERT(paddings->rank() == 2, "paddings should be rank 2");
+
+  int32_t n = paddings->dim(0).value();
+  int32_t v = paddings->dim(1).value();
+
+  LUCI_ASSERT(v == 2, "paddings should be [n, 2]");
+  LUCI_ASSERT(n == int32_t(input_shape.rank()),
+              "paddings [n, 2] should have same value of input rank");
+
+  loco::TensorShape output_shape;
+
+  output_shape.rank(input_shape.rank());
+  for (int32_t ni = 0; ni < n; ++ni)
+  {
+    if (not input_shape.dim(ni).known())
+    {
+      output_shape.dim(ni).unset();
+      continue;
+    }
+    int32_t idx = ni * 2;
+    int value = input_shape.dim(ni).value();
+    if (paddings->dtype() == S32)
+    {
+      value += paddings->at<S32>(idx + 0); // left
+      value += paddings->at<S32>(idx + 1); // right
+    }
+    else
+    {
+      auto pl = paddings->at<S64>(idx + 0);
+      auto pr = paddings->at<S64>(idx + 1);
+      auto max = static_cast<int64_t>(std::numeric_limits<int32_t>::max());
+      auto low = static_cast<int64_t>(std::numeric_limits<int32_t>::lowest());
+      LUCI_ASSERT(pl <= max, "paddings is over 32 bit limit");
+      LUCI_ASSERT(pl >= low, "paddings is over 32 bit limit");
+      LUCI_ASSERT(pr <= max, "paddings is over 32 bit limit");
+      LUCI_ASSERT(pr >= low, "paddings is over 32 bit limit");
+      value += static_cast<int32_t>(pl); // left
+      value += static_cast<int32_t>(pr); // right
+    }
+    output_shape.dim(ni) = value;
+  }
+
+  return output_shape;
+}
+
 } // namespace sinf
 } // namespace luci

compiler/luci/service/src/CircleShapeInferenceHelper.h

@@ -48,6 +48,10 @@ loco::TensorShape circle_shape(const luci::CircleNode *node);
 // Throw an exception if x and y are not broadcastable.
 loco::TensorShape broadcast_shape(const loco::TensorShape &x, const loco::TensorShape &y);
 
+// Return shape of pad ops using paddings.
+loco::TensorShape pad_shape(const loco::TensorShape &input_shape,
+                            const luci::CircleConst *paddings);
+
 /**
  * @brief Create a higher-rank TensorShape following NumPy broadcasting semantics
  *

compiler/luci/service/src/HelperPads.h

@@ -18,7 +18,6 @@
 
 #include "CircleCloneNode.h"
 #include "CircleShapeInferenceHelper.h"
-#include "HelperPads.h"
 
 namespace luci
 {
@@ -35,7 +34,9 @@ loco::TensorShape Algorithm::visit(const luci::CirclePad *node)
 {
   // TODO support non-const case
   auto paddings = loco::must_cast<luci::CircleConst *>(node->paddings());
-  return use_paddings(node, paddings);
+  auto circle_input = loco::must_cast<const luci::CircleNode *>(node->input());
+  auto input_shape = circle_shape(circle_input);
+  return pad_shape(input_shape, paddings);
 }
 
 } // namespace sinf