[CodeGen] Implement CFI instruction insertion

1 files changed, 28 insertions, 0 deletions

diff --git a/backend/include/rcc/CodeGen/CFIInstrInserter.h b/backend/include/rcc/CodeGen/CFIInstrInserter.h
new file mode 100644
index 0000000..c6504fc
--- /dev/null
+++ b/backend/include/rcc/CodeGen/CFIInstrInserter.h
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_CFIINSTRINSERTER_H
+#define RCC_CODEGEN_CFIINSTRINSERTER_H
+
+#include "rcc/CodeGen/MachinePassManager.h"
+
+namespace rcc {
+
+class TargetFrameLowering;
+
+class CFIInstrInserterPass final : public MachineFunctionPass {
+public:
+  explicit CFIInstrInserterPass(const TargetFrameLowering &FrameLowering) noexcept
+      : FrameLowering(&FrameLowering) {}
+
+  [[nodiscard]] const MachinePassContract &contract() const noexcept override;
+  [[nodiscard]] Expected<MachinePassResult> run(MachineFunction &Function,
+                                                const TargetDescription &Target,
+                                                MachineFunctionAnalysisManager &Analyses) override;
+
+private:
+  const TargetFrameLowering *FrameLowering = nullptr;
+};
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_CFIINSTRINSERTER_H