[CodeGen] Implement CFI instruction insertion

1 files changed, 7 insertions, 0 deletions

diff --git a/backend/include/rcc/CodeGen/TargetFrameLowering.h b/backend/include/rcc/CodeGen/TargetFrameLowering.h
index 705a548..e3f0f37 100644
--- a/backend/include/rcc/CodeGen/TargetFrameLowering.h
+++ b/backend/include/rcc/CodeGen/TargetFrameLowering.h
@@ -31,6 +31,13 @@ class TargetFrameLowering {
 public:
   virtual ~TargetFrameLowering() = default;
 
+  [[nodiscard]] virtual PhysicalRegister
+  initialCFARegister(const MachineFunction &Function,
+                     const TargetDescription &Target) const noexcept = 0;
+  [[nodiscard]] virtual std::int64_t initialCFAOffset(const MachineFunction &) const noexcept {
+    return 0;
+  }
+
   [[nodiscard]] virtual Expected<void> prepareFrame(MachineFunction &Function,
                                                     const TargetDescription &Target,
                                                     FrameLoweringOptions Options = {}) const = 0;