[all-commits] [llvm/llvm-project] a082cc: Add Apple M4 host detection (#117530)

[Mads Marquart via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a082cc145f98a2075e53d7cbc1058288781154ac
      https://github.com/llvm/llvm-project/commit/a082cc145f98a2075e53d7cbc1058288781154ac
  Author: Mads Marquart <mads at marquart.dk>
  Date:   2025-01-16 (Thu, 16 Jan 2025)

  Changed paths:
    M llvm/lib/TargetParser/Host.cpp

  Log Message:
  -----------
  Add Apple M4 host detection (#117530)

Add Apple M4 host detection, which fixes
https://github.com/rust-lang/rust/issues/133414.

Also add support for older ARM families (this is likely never going to
get used, since only macOS is officially supported as host OS, but nice
to have for completeness sake). Error handling (checking
`CPUFAMILY_UNKNOWN`) is also included here.

Finally, add links to extra documentation to make it easier for others
to update this in the future.

NOTE: These values are taken from `mach/machine.h` the Xcode 16.2 SDK,
and has been confirmed on an M4 Max in
https://github.com/rust-lang/rust/issues/133414#issuecomment-2499123337.



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