[PATCH] D45490: [ADT] - Add llvm::make_mapped_range

[Alexander Richardson via Phabricator via llvm-commits]

arichardson accepted this revision.
arichardson added a comment.

Seems like at -O2 clang 5.0.0 can optimize away all the optional checks (https://godbolt.org/g/rbGYrN)


https://reviews.llvm.org/D45490