Introduce SourceManager::ísBeforeInTranslationUnit() which can compare 2 source locations and determine which one comes before the other, relative to the translation unit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74014 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed