[pten] add optional type for infermeta (#39848)

* modify infershape by args_def

* add optional type for infermate

* add optional type for infermate

* add optional type for infermate

* support scalar type

* change OptionalInputAt function to none template

* support phi::DataType

paddle/fluid/framework/infershape_utils.cc

@@ -20,6 +20,7 @@ limitations under the License. */
 #include "paddle/fluid/framework/framework.pb.h"
 #include "paddle/fluid/framework/pten_utils.h"
 #include "paddle/fluid/platform/enforce.h"
+#include "paddle/phi/common/scalar.h"
 #include "paddle/phi/common/scalar_array.h"
 #include "paddle/phi/core/compat/arg_map_context.h"
 #include "paddle/phi/core/compat/convert_utils.h"
@@ -376,47 +377,101 @@ phi::InferMetaContext BuildInferMetaContext(InferShapeContext* ctx,
               attr_name));
         }
       }
+    } else if (attr_defs[i].type_index ==
+               std::type_index(typeid(phi::Scalar))) {
+      if (ctx->HasAttr(attr_name)) {
+        // TODO(chentianyu03): support other attrs later
+        auto& attr = attr_reader.GetAttr(attr_name);
+        if (std::type_index(attr.type()) == std::type_index(typeid(float))) {
+          infer_meta_context.EmplaceBackAttr(
+              phi::Scalar(BOOST_GET_CONST(float, attr)));
+        } else if (std::type_index(attr.type()) ==
+                   std::type_index(typeid(std::string))) {
+          infer_meta_context.EmplaceBackAttr(
+              phi::Scalar(BOOST_GET_CONST(std::string, attr)));
+        } else if (std::type_index(attr.type()) ==
+                   std::type_index(typeid(int))) {
+          infer_meta_context.EmplaceBackAttr(
+              phi::Scalar(BOOST_GET_CONST(int, attr)));
+        } else {
+          PADDLE_THROW(platform::errors::Unimplemented(
+              "Unsupported cast op attribute `%s` to Scalar when construct "
+              "InferMetaContext.",
+              attr_name));
+        }
+      } else if (ctx->HasInput(attr_name)) {
+        const auto& infershape_input = ctx->GetInputVarPtrs(attr_name);
 
+        if (infershape_input.size() == 1) {
+          if (ctx->IsRuntime()) {
+            Variable* var = BOOST_GET_CONST(Variable*, infershape_input[0]);
+            infer_meta_context.EmplaceBackAttr(
+                std::move(experimental::MakePtenScalarFromVar(*var)));
+          } else {
+            phi::Scalar tensor_scalar(-1);
+            tensor_scalar.SetFromTensor(true);
+            infer_meta_context.EmplaceBackAttr(std::move(tensor_scalar));
+          }
+        } else {
+          PADDLE_THROW(platform::errors::InvalidArgument(
+              "Invalid input.size() when cast op attribute `%s` to Scalar, "
+              "expected 1, but actually is %d .",
+              attr_name, infershape_input.size()));
+        }
+      }
     } else if (ctx->HasAttr(attr_name)) {
       // Emplace Back Attr according to the type of attr.
       auto& attr = attr_reader.GetAttr(attr_name);
-      if (std::type_index(attr.type()) == std::type_index(typeid(bool))) {
+      if (attr_defs[i].type_index == std::type_index(typeid(bool))) {
         infer_meta_context.EmplaceBackAttr(BOOST_GET_CONST(bool, attr));
-      } else if (std::type_index(attr.type()) == std::type_index(typeid(int))) {
+      } else if (attr_defs[i].type_index == std::type_index(typeid(int))) {
         infer_meta_context.EmplaceBackAttr(BOOST_GET_CONST(int, attr));
-      } else if (std::type_index(attr.type()) ==
-                 std::type_index(typeid(int64_t))) {
+      } else if (attr_defs[i].type_index == std::type_index(typeid(int64_t))) {
         infer_meta_context.EmplaceBackAttr(BOOST_GET_CONST(int64_t, attr));
-      } else if (std::type_index(attr.type()) ==
-                 std::type_index(typeid(float))) {
+      } else if (attr_defs[i].type_index == std::type_index(typeid(float))) {
         infer_meta_context.EmplaceBackAttr(BOOST_GET_CONST(float, attr));
-      } else if (std::type_index(attr.type()) ==
+      } else if (attr_defs[i].type_index ==
                  std::type_index(typeid(std::string))) {
         infer_meta_context.EmplaceBackAttr(BOOST_GET_CONST(std::string, attr));
-      } else if (std::type_index(attr.type()) ==
+      } else if (attr_defs[i].type_index ==
                  std::type_index(typeid(std::vector<bool>))) {
         infer_meta_context.EmplaceBackAttr(
             BOOST_GET_CONST(std::vector<bool>, attr));
-      } else if (std::type_index(attr.type()) ==
+      } else if (attr_defs[i].type_index ==
                  std::type_index(typeid(std::vector<int>))) {
         infer_meta_context.EmplaceBackAttr(
             BOOST_GET_CONST(std::vector<int>, attr));
-      } else if (std::type_index(attr.type()) ==
+      } else if (attr_defs[i].type_index ==
                  std::type_index(typeid(std::vector<int64_t>))) {
-        infer_meta_context.EmplaceBackAttr(
-            BOOST_GET_CONST(std::vector<int64_t>, attr));
-      } else if (std::type_index(attr.type()) ==
+        if (std::type_index(attr.type()) ==
+            std::type_index(typeid(std::vector<int>))) {
+          // Emplace Back Attr according to the type of Phi_Kernel args.
+          const auto& vector_int_attr = BOOST_GET_CONST(std::vector<int>, attr);
+          const std::vector<int64_t> vector_int64_attr(vector_int_attr.begin(),
+                                                       vector_int_attr.end());
+          infer_meta_context.EmplaceBackAttr(vector_int64_attr);
+        } else {
+          infer_meta_context.EmplaceBackAttr(
+              BOOST_GET_CONST(std::vector<int64_t>, attr));
+        }
+      } else if (attr_defs[i].type_index ==
                  std::type_index(typeid(std::vector<float>))) {
         infer_meta_context.EmplaceBackAttr(
             BOOST_GET_CONST(std::vector<float>, attr));
-      } else if (std::type_index(attr.type()) ==
+      } else if (attr_defs[i].type_index ==
                  std::type_index(typeid(std::vector<double>))) {
         infer_meta_context.EmplaceBackAttr(
             BOOST_GET_CONST(std::vector<double>, attr));
-      } else if (std::type_index(attr.type()) ==
+      } else if (attr_defs[i].type_index ==
                  std::type_index(typeid(std::vector<std::string>))) {
         infer_meta_context.EmplaceBackAttr(
             BOOST_GET_CONST(std::vector<std::string>, attr));
+      } else if (attr_defs[i].type_index ==
+                 std::type_index(typeid(phi::DataType))) {
+        auto data_type = paddle::framework::TransToPtenDataType(
+            static_cast<framework::proto::VarType::Type>(
+                BOOST_GET_CONST(int, attr)));
+        infer_meta_context.EmplaceBackAttr(data_type);
       } else {
         PADDLE_THROW(platform::errors::Unimplemented(
             "Unsupported attribute type is received when call "

paddle/phi/core/infermeta_utils.cc

@@ -67,6 +67,14 @@ const MetaTensor& InferMetaContext::InputAt(size_t idx) const {
   return *inputs_.at(idx);
 }
 
+paddle::optional<const phi::MetaTensor&> InferMetaContext::OptionalInputAt(
+    size_t idx) const {
+  const auto& input = inputs_.at(idx);
+  return input ? paddle::optional<const phi::MetaTensor&>{static_cast<
+                     const phi::MetaTensor&>(*input)}
+               : paddle::optional<const phi::MetaTensor&>{paddle::none};
+}
+
 std::vector<MetaTensor> InferMetaContext::InputsBetween(size_t start,
                                                         size_t end) const {
   std::vector<MetaTensor> result;

paddle/phi/core/infermeta_utils.h

@@ -51,6 +51,9 @@ class InferMetaContext {
 
   const MetaConfig& GetMetaConfig() const;
   const MetaTensor& InputAt(size_t idx) const;
+
+  paddle::optional<const phi::MetaTensor&> OptionalInputAt(size_t idx) const;
+
   std::vector<MetaTensor> InputsBetween(size_t start, size_t end) const;
   MetaTensor* MutableOutputAt(size_t idx);
   std::vector<MetaTensor> MutableOutputBetween(size_t start, size_t end);
@@ -135,6 +138,24 @@ struct InferMetaFnImpl<Return (*)(Args...), infer_meta_fn> {
     }
   };
 
+  template <typename... Tail>
+  struct InferMetaFnCallHelper<paddle::optional<const MetaTensor&>, Tail...> {
+    template <int in_idx, int attr_idx, int out_idx, typename... PreviousArgs>
+    static void Call(InferMetaContext* ctx, PreviousArgs&... pargs) {
+      static_assert(attr_idx == 0,
+                    "InferMeta's Input should appear before Attributes.");
+      static_assert(out_idx == 0,
+                    "InferMeta's Input should appear before Outputs.");
+      const std::pair<int, int> range = ctx->InputRangeAt(in_idx);
+      auto arg = ctx->OptionalInputAt(range.first);
+
+      InferMetaFnCallHelper<
+          Tail...>::template Call<in_idx + 1, attr_idx, out_idx>(ctx,
+                                                                 pargs...,
+                                                                 arg);
+    }
+  };
+
   template <typename... Tail>
   struct InferMetaFnCallHelper<const std::vector<MetaTensor>&, Tail...> {
     template <int in_idx, int attr_idx, int out_idx, typename... PreviousArgs>