A-Profile Architecture support in LLVM toolchain 

A-Profile Architecture Feature Architecture Identifier LLVM LLD LLDB
Scalable Vector Extension (SVE) LLVM 5 (asm/disasm)
LLVM 11* (intrinsics)
LLVM 13* (auto-vectorization)
NA LLVM 12*
Pointer Authentication (PAuth) ARMv8.3-PAuth LLVM 8 LLVM 10 LLVM 12*
Memory Tagging Extension (MTE) ARMv8.5-MemTag LLVM 9 NA LLVM 12*
Branch Target Indicators (BTI) ARMv8.5-BTI LLVM 9 LLVM 10 LLVM 10
Bfloat16 ARMv8.2-BF16 LLVM 11* NA NA
Matrix Multiplication Extension ARMv8.2-I8MM
ARMv8.2-F32MM
ARMv8.2-F64MM
LLVM 11* NA NA
Scalable Vector Extension v2 (SVE2) LLVM 9 (asm/disasm)
LLVM 11* (intrinsics)
LLVM 13* (auto-vectorization)
NA LLVM 12*
Transactional Memory Extension (TME) LLVM 10 (asm/disasm)
LLVM 10 (intrinsics)
NA Planned

* Planned