tree d891e515186ae13a636896e9416879cc173f8529
parent 4efa216c9d753c0853aa96a8c54ed5014fbc12e6
author Matthew Dempsky <mdempsky@google.com> 1634078332 -0700
committer Matthew Dempsky <mdempsky@google.com> 1634148948 +0000

unsafe: optimize Slice bounds checking

This reduces the number of branches to bounds check non-empty slices
from 5 to 3. It does also increase the number of branches to handle
empty slices from 1 to 3; but for non-panicking calls, they should all
be predictable.

Updates #48798.

Change-Id: I3ffa66857096486f4dee417e1a66eb8fdf7a3777
Reviewed-on: https://go-review.googlesource.com/c/go/+/355490
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>