[ADT] Add bit_ceil_constexpr#164115

kazutakahirata merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

kazutakahirata:cleanup_20251018_ADT_bit_bit_ceil_constexpr_SmallPtrSetkazutakahirata/llvm-project:cleanup_20251018_ADT_bit_bit_ceil_constexpr_SmallPtrSetCopy head branch name to clipboard