[llvm] [AArch64] Define high bits of FPR and GPR registers (take 2) (PR #114827)

[Sander de Smalen via llvm-commits]

sdesmalen-arm wrote:

Thanks for letting me know. From what I can quickly see there is only a time difference for the `runtime` tests. The `clang`, `polly`, `llvm` and `lld` tests run in about the same time. @PiJoules the build you linked to was interrupted while building the `check-clang` target, which for the other builds pointed to by @zeroomega wasn't any slower. Perhaps I'm missing something here though.
I do see various other patches in the blamelist, has it been confirmed that this patch is the cause of the increased testing time?

https://github.com/llvm/llvm-project/pull/114827