Maybe if you had read the release notes you wouldn't have posted such a retarded comment. Oh, and large chunks of the llvm/clang team work at Apple.
"During the 3.5 release cycle, Apple released the source used to generate 64-bit ARM programs on iOS platforms. This took the form of a separate backend that had been developed in parallel to, and largely isolation from, the existing code.
We decided that maintaining the two backends indefinitely was not an option, since their features almost entirely overlapped. However, the implementation details in both were different enough that any merge had to firmly start with one backend as the core and cherry-pick the best features and optimisations from the other.
After discussion, we decided to start with the Apple backend (called ARM64 at the time) since it was older, more thoroughly tested in production use, and had fewer idiosyncracies in the implementation details.
Many people from across the community worked throughout April and May to ensure that this merge destination had all the features we wanted, from both sources. In many cases we could simply copy code across; others needed heavy modification for the new host; in the most worthwhile, we looked at both implementations and combined the best features of each in an entirely new way.
We had also decided that the name of the combined backend should be AArch64, following ARM’s official documentation. So, at the end of May the old AArch64 directory was removed, and ARM64 renamed into its place.
"