/// Set successor probability of a given iterator.
void MachineBasicBlock::setSuccProbability(succ_iterator I,
BranchProbability Prob) {
assert(!Prob.isUnknown());
if (Probs.empty() || Weights.empty())
return;
*getProbabilityIterator(I) = Prob;
// FIXME: Temporarily use the numerator of the probability to represent edge
// weight. This will be removed once all weight-version interfaces in MBB
// are replaces with probability-version interfaces.
*getWeightIterator(I) = Prob.getNumerator();
}
void MachineBasicBlock::addSuccessor(MachineBasicBlock *Succ,
BranchProbability Prob) {
// Probability list is either empty (if successor list isn't empty, this means
// disabled optimization) or has the same size as successor list.
if (!(Probs.empty() && !Successors.empty())) {
Probs.push_back(Prob);
// FIXME: Temporarily use the numerator of the probability to represent edge
// weight. This will be removed once all weight-version interfaces in MBB
// are replaced with probability-version interfaces.
Weights.push_back(Prob.getNumerator());
}
Successors.push_back(Succ);
Succ->addPredecessor(this);
}
void PrintTo(BranchProbability P, ::std::ostream *os) {
*os << P.getNumerator() << "/" << P.getDenominator();
}
