The AArch64 back-end to LLVM that provides support for the compiler infrastructure to target ARMv8 64-bit hardware, is now enabled within the default build.
AArch64 now joins x86, SPARC, PowerPC, ARM, MIPS, XCore, MSP430, MBlaze, NVPTX, and Hexagon as the compiler target back-ends to be built by default.
It was just last week that AArch64 support was added to LLVM/Clang
-- months after it became available within the GCC compiler -- and now with this commit
it's been promoted to being one of the default targets rather than needing to build LLVM with special flags for the necessary ARM 64-bit support.
Now to wait for 64-bit ARM hardware to begin shipping...