1 files changed, 39 insertions, 0 deletions
diff --git a/backend/include/rcc/CodeGen/MachineTailMerge.h b/backend/include/rcc/CodeGen/MachineTailMerge.h
new file mode 100644
index 0000000..94084ac
--- /dev/null
+++ b/backend/include/rcc/CodeGen/MachineTailMerge.h
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_MACHINETAILMERGE_H
+#define RCC_CODEGEN_MACHINETAILMERGE_H
+
+#include "rcc/CodeGen/MachinePass.h"
+
+#include <cstddef>
+
+namespace rcc {
+
+class TargetBranchInfo;
+
+struct MachineTailMergeOptions final {
+  std::size_t MaximumMergedBlocks = 4'096;
+};
+
+class MachineTailMergePass final : public MachineFunctionPass {
+public:
+  explicit MachineTailMergePass(const TargetBranchInfo &Info,
+                                MachineTailMergeOptions Options = {}) noexcept
+      : Info(&Info), 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 TargetBranchInfo *Info;
+  MachineTailMergeOptions Options;
+};
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_MACHINETAILMERGE_H