This example demonstrates how to optimize a function using the PassManager. In this case, we are applying the LoopUnrollPass with a factor of 3 to the function, followed by the DeadCodeEliminationPass. The run function is called on the PassManager to apply these transformations to the function. Example 2:c++ #include "llvm/IR/Function.h" #include "llvm/IR/PassManager.h" #include "llvm/Transforms/IPO/Inliner.h" void inlineFunction(llvm::Function &F) { llvm::PassManager PM; PM.add(llvm::createFunctionInliningPass()); PM.run(F); } ``` This example demonstrates how to inline a function using the PassManager. In this case, we are applying the FunctionInliningPass to the function, followed by calling the run function on the PassManager to inline the function. Overall, the PassManager is a powerful tool for optimizing C++ code and is a critical component of the LLVM package library.