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This works well enough to run some code natively on arm64, but not well enough for more complicated code. I've been suggested to start a pull request anyway.

Updates #30824

Change-Id: Ib4f63e0e8a9edfc862cf65b5f1b0fbf9a8a1628e
GitHub-Last-Rev: b01b105e0446e349c8d9895d3ac6918fa0cdc48c
GitHub-Pull-Request: golang/go#29398
Reviewed-on: https://go-review.googlesource.com/c/go/+/155739


Run-TryBot: Benny Siegert <bsiegert@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>