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// Copyright 2021 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_LOCALIZE_STRUCT_ARRAY_ASSIGNMENT_H_
#define SRC_TRANSFORM_LOCALIZE_STRUCT_ARRAY_ASSIGNMENT_H_
#include "src/transform/transform.h"
namespace tint {
namespace transform {
/// This transforms replaces assignment to dynamically-indexed fixed-size arrays
/// in structs on shader-local variables with code that copies the arrays to a
/// temporary local variable, assigns to the local variable, and copies the
/// array back. This is to work around FXC's compilation failure for these cases
/// (see crbug.com/tint/1206).
///
/// @note Depends on the following transforms to have been run first:
/// * SimplifyPointers
class LocalizeStructArrayAssignment
: public Castable<LocalizeStructArrayAssignment, Transform> {
public:
/// Constructor
LocalizeStructArrayAssignment();
/// Destructor
~LocalizeStructArrayAssignment() 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:
class State;
};
} // namespace transform
} // namespace tint
#endif // SRC_TRANSFORM_LOCALIZE_STRUCT_ARRAY_ASSIGNMENT_H_