function.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 TVM_TIR_FUNCTION_H_
#define TVM_TIR_FUNCTION_H_

#include <tvm/ir/function.h>
#include <tvm/runtime/ndarray.h>
#include <tvm/tir/buffer.h>
#include <tvm/tir/expr.h>
#include <tvm/tir/stmt.h>

#include <string>

namespace tvm {
namespace tir {

class PrimFuncNode : public BaseFuncNode {
 public:
  Array<tir::Var> params;
  tir::Stmt body;
  Type ret_type;
  Map<tir::Var, Buffer> buffer_map;

  void VisitAttrs(tvm::AttrVisitor* v) {
    v->Visit("params", &params);
    v->Visit("body", &body);
    v->Visit("ret_type", &ret_type);
    v->Visit("buffer_map", &buffer_map);
    v->Visit("attrs", &attrs);
    v->Visit("span", &span);
    v->Visit("_checked_type_", &checked_type_);
  }

  bool SEqualReduce(const PrimFuncNode* other, SEqualReducer equal) const {
    // visit params and buffer_map first as they contains defs.
    return equal.DefEqual(params, other->params) && equal(buffer_map, other->buffer_map) &&
           equal(ret_type, other->ret_type) && equal(body, other->body) &&
           equal(attrs, other->attrs);
  }

  void SHashReduce(SHashReducer hash_reduce) const {
    hash_reduce.DefHash(params);
    hash_reduce(buffer_map);
    hash_reduce(ret_type);
    hash_reduce(body);
    hash_reduce(attrs);
  }
  TVM_DLL FuncType func_type_annotation() const;

  TVM_OBJECT_ENABLE_SCRIPT_PRINTER();

  static constexpr const char* _type_key = "tir.PrimFunc";
  TVM_DECLARE_FINAL_OBJECT_INFO(PrimFuncNode, BaseFuncNode);
};

class PrimFunc : public BaseFunc {
 public:
  TVM_DLL PrimFunc(Array<tir::Var> params, Stmt body, Type ret_type = VoidType(),
                   Map<tir::Var, Buffer> buffer_map = Map<tir::Var, Buffer>(),
                   DictAttrs attrs = NullValue<DictAttrs>(), Span span = Span());

  TVM_DEFINE_OBJECT_REF_METHODS(PrimFunc, BaseFunc, PrimFuncNode);
  TVM_DEFINE_OBJECT_REF_COW_METHOD(PrimFuncNode);
};

class TensorIntrinNode : public Object {
 public:
  PrimFunc desc;
  PrimFunc impl;

  void VisitAttrs(AttrVisitor* v) {
    v->Visit("desc", &desc);
    v->Visit("impl", &impl);
  }

  static constexpr const char* _type_key = "tir.TensorIntrin";
  TVM_DECLARE_FINAL_OBJECT_INFO(TensorIntrinNode, Object);
};

class TensorIntrin : public ObjectRef {
 public:
  TVM_DLL explicit TensorIntrin(PrimFunc desc, PrimFunc impl);

  TVM_DLL static void Register(String name, TensorIntrin intrin, bool override = false);

  TVM_DLL static Optional<TensorIntrin> Get(String name, bool allow_missing = false);

  TVM_DEFINE_OBJECT_REF_METHODS(TensorIntrin, ObjectRef, TensorIntrinNode)
};

PrimFunc Specialize(PrimFunc func, const Map<Var, ObjectRef>& param_map);

namespace attr {

constexpr const char* kKernelLaunchParams = "tir.kernel_launch_params";

constexpr const char* kNoAlias = "tir.noalias";

constexpr const char* kIsEntryFunc = "tir.is_entry_func";

constexpr const char* kIsGlobalFunc = "tir.is_global_func";

constexpr const char* kIsHostFunc = "tir.is_host_func";

}  // namespace attr
}  // namespace tir
}  // namespace tvm
#endif  // TVM_TIR_FUNCTION_H_