To start with the addition of IR optimization support, first of all a static variable for function manager has to be defined as follows:

static FunctionPassManager *Global_FP;

Then, a function pass manager needs to be defined for the Module object used previously. This can be done in the main() function as follows:

FunctionPassManager My_FP(TheModule);

Now a pipeline of various optimizer passes can be added in the main() function as follows:

My_FP.add(createBasicAliasAnalysisPass());
My_FP.add(createInstructionCombiningPass());
My_FP.add(createReassociatePass());
My_FP.add(createGVNPass());
My_FP.doInitialization();

Now the static global function Pass Manager is assigned to this pipeline as follows:

Global_FP = &amp...