// Define a unique number for the abbreviation.
//
void DwarfFile::assignAbbrevNumber(DIEAbbrev &Abbrev) {
// Check the set for priors.
DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
// If it's newly added.
if (InSet == &Abbrev) {
// Add to abbreviation list.
Abbreviations.push_back(&Abbrev);
// Assign the vector position + 1 as its number.
Abbrev.setNumber(Abbreviations.size());
} else {
// Assign existing abbreviation number.
Abbrev.setNumber(InSet->getNumber());
}
}
DIEAbbrev &DIEAbbrevSet::uniqueAbbreviation(DIE &Die) {
FoldingSetNodeID ID;
DIEAbbrev Abbrev = Die.generateAbbrev();
Abbrev.Profile(ID);
void *InsertPos;
if (DIEAbbrev *Existing =
AbbreviationsSet.FindNodeOrInsertPos(ID, InsertPos)) {
Die.setAbbrevNumber(Existing->getNumber());
return *Existing;
}
// Move the abbreviation to the heap and assign a number.
DIEAbbrev *New = new (Alloc) DIEAbbrev(std::move(Abbrev));
Abbreviations.push_back(New);
New->setNumber(Abbreviations.size());
Die.setAbbrevNumber(Abbreviations.size());
// Store it for lookup.
AbbreviationsSet.InsertNode(New, InsertPos);
return *New;
}