1 files changed, 35 insertions, 0 deletions
diff --git a/backend/include/rcc/CodeGen/MachineCSE.h b/backend/include/rcc/CodeGen/MachineCSE.h
new file mode 100644
index 0000000..1c2057b
--- /dev/null
+++ b/backend/include/rcc/CodeGen/MachineCSE.h
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_MACHINECSE_H
+#define RCC_CODEGEN_MACHINECSE_H
+
+#include "rcc/CodeGen/MachinePass.h"
+
+#include <cstddef>
+
+namespace rcc {
+
+struct MachineCSEOptions final {
+  std::size_t MaximumComparisons = 100'000;
+};
+
+class MachineCSEPass final : public MachineFunctionPass {
+public:
+  explicit MachineCSEPass(MachineCSEOptions Options = {}) : 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,
+                                                              MachineAnalysisManager &Analyses);
+
+  MachineCSEOptions Options;
+};
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_MACHINECSE_H