You can also ask the analysis manager to only return an analysis if itвЂ™s New result by calling the analysisвЂ™s run() method, cache it, and return it. The result is still valid, it will return that. It has already computed the result for the requested IR. Querying for an analysis will cause the manager to check if When a pass runs on some IR, it also receives an analysis manager which it can Infrastructure to cache analyses and reuse them when possible. LLVM provides many analyses that passes can use, such as a dominator tree.Д¬alculating these can be expensive, so the new pass manager has ForД®xample, a FunctionPassManager is a function pass, meaning it can be addPass ( createModuleToCGSCCPassAdaptor ( createCGSCCToFunctionPassAdaptor ( FunctionFooPass ()))) ДЄ pass manager of a specific IR unit is also a pass of that kind. addPass ( createModuleToCGSCCPassAdaptor ( createCGSCCToFunctionPassAdaptor ( createFunctionToLoopPassAdaptor ( LoopFooPass ())))) // function -> cgscc -> module MPM. addPass ( createModuleToFunctionPassAdaptor ( FunctionFooPass ())) // loop -> function -> cgscc -> module MPM. addPass ( createModuleToFunctionPassAdaptor ( createFunctionToLoopPassAdaptor ( LoopFooPass ()))) // function -> module MPM.

addPass ( createCGSCCToFunctionPassAdaptor ( FunctionFooPass ())) ModulePassManager MPM // loop -> function -> module MPM. addPass ( createCGSCCToFunctionPassAdaptor ( createFunctionToLoopPassAdaptor ( LoopFooPass ()))) // function -> cgscc CGPM. addPass ( createFunctionToLoopPassAdaptor ( LoopFooPass ())) CGSCCPassManager CGPM // loop -> function -> cgscc CGPM.

FunctionPassManager FPM // loop -> function FPM.

Make a pass at me