From e0c77d80585428818c32886eb8c26755ea8ed159 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sat, 1 Aug 2026 18:17:33 +0800
Subject: [CodeGen] Track debug instruction identities

Add monotonic MIR debug instruction numbers and structured value substitutions. Verify live number uniqueness, meta-instruction exclusion, substitution graph integrity, and target subregister references while preserving debug identities during cloning.
---
 backend/include/rcc/CodeGen/MachineFunction.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'backend/include/rcc/CodeGen/MachineFunction.h')

diff --git a/backend/include/rcc/CodeGen/MachineFunction.h b/backend/include/rcc/CodeGen/MachineFunction.h
index c067ee1..8addd4e 100644
--- a/backend/include/rcc/CodeGen/MachineFunction.h
+++ b/backend/include/rcc/CodeGen/MachineFunction.h
@@ -16,6 +16,7 @@
 #include "rcc/Support/Error.h"
 
 #include <cstddef>
+#include <cstdint>
 #include <memory>
 #include <span>
 #include <string>
@@ -176,6 +177,8 @@ public:
 
 private:
   MachineFunction(std::string Name, MachineFunctionStableID StableID);
+  [[nodiscard]] Expected<std::uint32_t> allocateDebugInstrNumber();
+  void observeDebugInstrNumber(std::uint32_t Number) noexcept;
 
   std::string Name;
   MachineFunctionStableID StableID;
@@ -195,6 +198,7 @@ private:
   std::vector<const MachineMemOperand *> AllMemOperands;
   StableIDGenerator<MachineBlockStableID> BlockIDGenerator;
   StableIDGenerator<MachineInstrStableID> InstrIDGenerator;
+  std::uint32_t DebugInstrNumberingCount = 0;
   std::unique_ptr<MachineArena> Arena;
 
   friend class MachineBasicBlock;
-- 
cgit v1.2.3