It is possible to develop LLVM passes against installed LLVM. + An example of project layout provided below:
+ ++ <project dir>/ + | + CMakeLists.txt + <pass name>/ + | + CMakeLists.txt + Pass.cpp + ... ++
Contents of <project dir>/CMakeLists.txt:
+ +
+ find_package(LLVM)
+
+ # Define add_llvm_* macro's.
+ include(AddLLVM)
+
+ add_definitions(${LLVM_DEFINITIONS})
+ include_directories(${LLVM_INCLUDE_DIRS})
+ link_directories(${LLVM_LIBRARY_DIRS})
+
+ add_subdirectory(<pass name>)
+
+ Contents of <project dir>/<pass name>/CMakeLists.txt:
+ ++ add_llvm_loadable_module(LLVMPassname + Pass.cpp + ) ++
When you are done developing your pass, you may wish to integrate it
+ into LLVM source tree. You can achieve it in two easy steps:
+ 1. Copying <pass name> folder into <LLVM root>/lib/Transform directory.
+ 2. Adding "add_subdirectory(<pass name>)" line into <LLVM root>/lib/Transform/CMakeLists.txt
If you are used CMake to build LLVM, see +Developing an LLVM pass with CMake.
+Now that we have the build scripts set up, we just need to write the code for the pass itself.