-bool LLVMContext::RemoveDeadMetadata() {
- std::vector<const MDNode *> DeadMDNodes;
- bool Changed = false;
- while (1) {
-
- for (SmallPtrSet<const MDNode *, 8>::iterator
- I = pImpl->MDNodes.begin(),
- E = pImpl->MDNodes.end(); I != E; ++I) {
- const MDNode *N = cast<MDNode>(*I);
- if (N->use_empty())
- DeadMDNodes.push_back(N);
- }
-
- if (DeadMDNodes.empty())
- return Changed;
-
- while (!DeadMDNodes.empty()) {
- const MDNode *N = DeadMDNodes.back(); DeadMDNodes.pop_back();
- delete N;
- }
- }
- return Changed;
-}