Merge branch 'backend' into SCCP

src/CMakeLists.txt

@@ -23,10 +23,15 @@ add_executable(sysyc
   SysYIRPrinter.cpp
   SysYIRCFGOpt.cpp
   SysYIRAnalyser.cpp
-  DeadCodeElimination.cpp
-  Mem2Reg.cpp
-  Reg2Mem.cpp
+  # DeadCodeElimination.cpp
+  AddressCalculationExpansion.cpp
+  # Mem2Reg.cpp
+  # Reg2Mem.cpp
   RISCv64Backend.cpp
+  RISCv64ISel.cpp
+  RISCv64RegAlloc.cpp
+  RISCv64AsmPrinter.cpp
+  RISCv64Passes.cpp
 )
 
 # 设置 include 路径，包含 ANTLR 运行时库和项目头文件