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| author | fanzha02 <fannie.zhang@arm.com> | 2021-09-06 11:06:16 +0800 |
|---|---|---|
| committer | fannie zhang <Fannie.Zhang@arm.com> | 2021-09-06 03:31:43 +0000 |
| commit | 43b05173a219e19697c2f9c6d98cf4d8667b7ca5 (patch) | |
| tree | e9f2a0d4c0ff286bbb50ce369902d77496586c87 /src/syscall/exec_linux.go | |
| parent | 7619a4528d506277f44e8d4b70366b5b5633b40f (diff) | |
| download | go-43b05173a219e19697c2f9c6d98cf4d8667b7ca5.tar.xz | |
cmd/compile: merge zero/sign extensions with UBFX/SBFX on arm64
The UBFX and SBFX already zero/sign extend the result. Further
zero/sign extensions are thus unnecessary as long as they leave
the top bits unaltered. This patch absorbs zero/sign extensions
into UBFX/SBFX.
Add the related test cases.
Change-Id: I7c4516c8b52d677f77bf3aaedab87c4a28056ec0
Reviewed-on: https://go-review.googlesource.com/c/go/+/265039
Trust: fannie zhang <Fannie.Zhang@arm.com>
Trust: Keith Randall <khr@golang.org>
Run-TryBot: fannie zhang <Fannie.Zhang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Diffstat (limited to 'src/syscall/exec_linux.go')
0 files changed, 0 insertions, 0 deletions