[compiler-rt] [llvm] [AArch64] Implement INIT/ADJUST_TRAMPOLINE (PR #70267)

[David Truby via llvm-commits]

https://github.com/DavidTruby approved this pull request.

LGTM. Could you update the NOTE about aarch64 in https://github.com/llvm/llvm-project/blob/main/flang/docs/InternalProcedureTrampolines.md to note that this is implemented now, but requires compiler-rt (and -rtlib=compiler-rt)? That can be in a separate NFC patch without review after -rtlib=compiler-rt goes in, if you merge this first.

https://github.com/llvm/llvm-project/pull/70267