OptimizationRemarkEmitter::OptimizationRemarkEmitter(const Function *F)
: F(F), BFI(nullptr) {
if (!F->getContext().getDiagnosticHotnessRequested())
return;
// First create a dominator tree.
DominatorTree DT;
DT.recalculate(*const_cast<Function *>(F));
// Generate LoopInfo from it.
LoopInfo LI;
LI.analyze(DT);
// Then compute BranchProbabilityInfo.
BranchProbabilityInfo BPI;
BPI.calculate(*F, LI);
// Finally compute BFI.
OwnedBFI = llvm::make_unique<BlockFrequencyInfo>(*F, BPI, LI);
BFI = OwnedBFI.get();
}
BranchProbabilityInfo
BranchProbabilityAnalysis::run(Function &F, AnalysisManager<Function> &AM) {
BranchProbabilityInfo BPI;
BPI.calculate(F, AM.getResult<LoopAnalysis>(F));
return BPI;
}
BranchProbabilityInfo
BranchProbabilityAnalysis::run(Function &F, FunctionAnalysisManager &AM) {
BranchProbabilityInfo BPI;
BPI.calculate(F, AM.getResult<LoopAnalysis>(F), &AM.getResult<TargetLibraryAnalysis>(F));
return BPI;
}