This reverts commit 8c2b577217, reversing changes made to 9cf18e98f8.
8c2b577217
9cf18e98f8
PreservedSymbols
When building with LTO, builtin functions that are defined but whose calls have not been inserted yet, get internalized. We need to prevent these symbols from being internalized at LTO time. Refer to https://reviews.llvm.org/D49434.