build(build): 拆分子目录 CMakeLists 并规范目标命名

src/mir/CMakeLists.txt

@@ -0,0 +1,24 @@
+add_library(mir_core STATIC
+  MIRContext.cpp
+  MIRFunction.cpp
+  MIRBasicBlock.cpp
+  MIRInstr.cpp
+  Register.cpp
+  Lowering.cpp
+  RegAlloc.cpp
+  FrameLowering.cpp
+  AsmPrinter.cpp
+)
+
+target_link_libraries(mir_core PUBLIC
+  build_options
+  ir
+)
+
+add_subdirectory(passes)
+
+add_library(mir INTERFACE)
+target_link_libraries(mir INTERFACE
+  mir_core
+  mir_passes
+)

src/mir/passes/CMakeLists.txt

@@ -0,0 +1,9 @@
+add_library(mir_passes STATIC
+  PassManager.cpp
+  Peephole.cpp
+)
+
+target_link_libraries(mir_passes PUBLIC
+  build_options
+  mir_core
+)