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// Copyright 2020 The Tint Authors.
//
// 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 SRC_TRANSFORM_ROBUSTNESS_H_
#define SRC_TRANSFORM_ROBUSTNESS_H_
#include <unordered_set>
#include "src/transform/transform.h"
// Forward declarations
namespace tint {
namespace ast {
class IndexAccessorExpression;
class CallExpression;
} // namespace ast
} // namespace tint
namespace tint {
namespace transform {
/// This transform is responsible for clamping all array accesses to be within
/// the bounds of the array. Any access before the start of the array will clamp
/// to zero and any access past the end of the array will clamp to
/// (array length - 1).
class Robustness : public Castable<Robustness, Transform> {
public:
/// Storage class to be skipped in the transform
enum class StorageClass {
kUniform,
kStorage,
};
/// Configuration options for the transform
struct Config : public Castable<Config, Data> {
/// Constructor
Config();
/// Copy constructor
Config(const Config&);
/// Destructor
~Config() override;
/// Assignment operator
/// @returns this Config
Config& operator=(const Config&);
/// Storage classes to omit from apply the transform to.
/// This allows for optimizing on hardware that provide safe accesses.
std::unordered_set<StorageClass> omitted_classes;
};
/// Constructor
Robustness();
/// Destructor
~Robustness() override;
protected:
/// Runs the transform using the CloneContext built for transforming a
/// program. Run() is responsible for calling Clone() on the CloneContext.
/// @param ctx the CloneContext primed with the input program and
/// ProgramBuilder
/// @param inputs optional extra transform-specific input data
/// @param outputs optional extra transform-specific output data
void Run(CloneContext& ctx,
const DataMap& inputs,
DataMap& outputs) const override;
private:
struct State;
};
} // namespace transform
} // namespace tint
#endif // SRC_TRANSFORM_ROBUSTNESS_H_