| commit | 86d223eaccecff72b44cd23a014bc028b658055e | [log] [tgz] |
|---|---|---|
| author | Ian Lance Taylor <iant@golang.org> | Mon Jan 06 21:29:20 2020 -0800 |
| committer | Ian Lance Taylor <iant@golang.org> | Tue Jan 07 15:34:20 2020 +0000 |
| tree | 22b2fd05328333c37a8aea573e147d31ef9c6817 | |
| parent | d0a102eea2262e3fca89b1eb342fd03328c4aa16 [diff] |
compiler: avoid write barrier for a[i] = a[i][:v]
This avoids generating a write barrier for code that appears in the
Go1.14beta1 runtime package in (*pageAlloc).sysGrow:
s.summary[l] = s.summary[l][:needIdxLimit]
Change-Id: If0c7c76eabbdd68c28e5e9e9233af013144f34f2
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/213558
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>