class PredIteratorCache {
/// BlockToPredsMap - Pointer to null-terminated list.
DenseMap<BasicBlock*, BasicBlock**> BlockToPredsMap;
+ DenseMap<BasicBlock*, unsigned> BlockToPredCountMap;
/// Memory - This is the space that holds cached preds.
BumpPtrAllocator Memory;
SmallVector<BasicBlock*, 32> PredCache(pred_begin(BB), pred_end(BB));
PredCache.push_back(0); // null terminator.
+
+ BlockToPredCountMap[BB] = PredCache.size()-1;
Entry = Memory.Allocate<BasicBlock*>(PredCache.size());
std::copy(PredCache.begin(), PredCache.end(), Entry);
return Entry;
}
+
+ unsigned GetNumPreds(BasicBlock *BB) {
+ GetPreds(BB);
+ return BlockToPredCountMap[BB];
+ }
/// clear - Remove all information.
void clear() {
BlockToPredsMap.clear();
+ BlockToPredCountMap.clear();
Memory.Reset();
}
};