This silences the warning below:
llvm-project/llvm/lib/Analysis/DomTreeUpdater.cpp:510:20: warning: loop variable 'BB' is always a copy because the range of type 'const SmallPtrSet<llvm::BasicBlock *, 8>' does not return a reference [-Wrange-loop-analysis]
for (const auto &BB : DeletedBBs) {
^
llvm-project/llvm/lib/Analysis/DomTreeUpdater.cpp:510:8: note: use non-reference type 'llvm::BasicBlock *'
for (const auto &BB : DeletedBBs) {
^~~~~~~~~~~~~~~~
1 warning generated.
ec00aa99dd