backend/include/rcc/CodeGen/MachineCombiner.h


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// SPDX-License-Identifier: GPL-3.0-or-later

#ifndef RCC_CODEGEN_MACHINECOMBINER_H
#define RCC_CODEGEN_MACHINECOMBINER_H

#include "rcc/CodeGen/MachineCombinerPattern.h"
#include "rcc/CodeGen/MachinePass.h"

#include <cstddef>

namespace rcc {

struct MachineCombinerOptions final {
  std::size_t MaximumRewrites = 4096;
  std::size_t MaximumIterations = 8;
};

class MachineCombinerPass final : public MachineFunctionPass {
public:
  MachineCombinerPass(const TargetMachineCombinerInfo &Info, MachineCombinerStage Stage,
                      MachineCombinerOptions Options = {}) noexcept
      : Info(&Info), Stage(Stage), Options(Options) {}

  [[nodiscard]] const MachinePassContract &contract() const noexcept override;
  [[nodiscard]] Expected<MachinePassResult> run(MachineFunction &Function,
                                                const TargetDescription &Target,
                                                MachineAnalysisManager &Analyses) override;

private:
  [[nodiscard]] Expected<MachinePassResult>
  runImplementation(MachineFunction &Function, const TargetDescription &Target) const;

  const TargetMachineCombinerInfo *Info;
  MachineCombinerStage Stage;
  MachineCombinerOptions Options;
};

} // namespace rcc

#endif // RCC_CODEGEN_MACHINECOMBINER_H