llvm-project

0171e236 - Revert "Revert fix bug that undefined internal is a warning only for -pedantic-errors

Revert "Revert fix bug that undefined internal is a warning only for -pedantic-errors This reverts commit 9f283bfb9e66d57fefeb3a28318ec40081fa9a24 which was a revert of commit e16882fc7416a30d56d5b5a19d549ca7c653e668; it addresses the issue found by the failing buildbot.