What's the process of connecting an LLVM pass to an external library?

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The process of connecting an LLVM pass to an external library can be done in the following steps:

1. Include the header files of the external library in the LLVM pass source code file.

2. Link the LLVM pass code with the external library while building the pass. This can be done by passing the library path and library name to the linker flags.

3. Use the functions provided by the external library in the LLVM pass code. This can be done by calling the functions in the library that you want to use.

4. Use LLVM APIs to interact with the IR (Intermediate Representation) and use the external library APIs to perform actions on the IR.

5. Compile and build the LLVM pass to generate the executable code.

6. Test the LLVM pass using sample input programs to check its behavior.

Overall, the process of connecting an LLVM pass to an external library involves including the external library in the LLVM pass code, linking the pass with the library, and then using the library APIs to perform operations on the IR.