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/*
* Copyright (c) 2019 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.
*/
#ifndef __LOCO_SERVICE_SHAPE_INFERENCE_RULE_H__
#define __LOCO_SERVICE_SHAPE_INFERENCE_RULE_H__
#include "loco/IR/Domain.h"
#include "loco/IR/Dialect.h"
#include "loco/IR/Node.h"
#include "loco/IR/NodeShape.h"
namespace loco
{
struct ShapeInferenceRule
{
virtual ~ShapeInferenceRule() = default;
enum class API
{
/**
* API v1
*
* This API uses "shape_get" method to query the shape of other nodes.
*/
V1,
/**
* API v2
*
* This API uses a given context (defined below) to query the shape of other nodes.
*/
V2,
};
/// @brief Check whether a given API is available or not
virtual bool support(const API &api) const
{
// To be backward compatible
return api == API::V1;
}
/// @brief Return true if this rule recognizes a given dialect
virtual bool recognize(const Dialect *) const = 0;
/**
* @brief Infer node's shape
*
* WARNING!!
*
* Implementation SHOULD return true only when it succeeds in inference!
*
*/
virtual bool infer(const Node *, NodeShape &) const = 0;
//
// API v2
//
struct Context
{
virtual ~Context() = default;
virtual bool known(const Node *node) const = 0;
virtual NodeShape get(const Node *node) const = 0;
};
struct Sink
{
virtual ~Sink() = default;
// TODO Add methods for error reporting
// Each ShapeInferenceRule SHOULD invoke one of okay and fail before it returns
virtual void okay(const NodeShape &) = 0;
virtual void fail(void) = 0;
};
// WARNING! Invoke this method only when API v2 is supported
virtual void infer(const Context *, const Node *, Sink *) const;
};
} // namespace loco
#endif // __LOCO_SERVICE_SHAPE_INFERENCE_RULE_H__
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