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a98bb7e244
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Josh Bleecher Snyder a98bb7e244 cmd/compile: only optimize chained Moves on disjoint stack mem 
This optimization is not sound if A, B, or C
might overlap with each other.

Thanks to Michael Munday for pointing this
out during the review of CL 143479.

This reduces the number of times this optimization
triggers during make.bash from 386 to 74.

This is unfortunate, but I don't see an obvious way around it,
short of souping up the disjointness analysis.

name        old object-bytes  new object-bytes  delta
Template          507kB ± 0%        507kB ± 0%   +0.13%  (p=0.008 n=5+5)
Unicode           225kB ± 0%        225kB ± 0%     ~     (all equal)
GoTypes          1.85MB ± 0%       1.85MB ± 0%   +0.02%  (p=0.008 n=5+5)
Flate             328kB ± 0%        328kB ± 0%     ~     (all equal)
GoParser          402kB ± 0%        402kB ± 0%     ~     (all equal)
Reflect          1.41MB ± 0%       1.41MB ± 0%     ~     (all equal)
Tar               457kB ± 0%        458kB ± 0%   +0.20%  (p=0.008 n=5+5)
XML               600kB ± 0%        601kB ± 0%   +0.03%  (p=0.008 n=5+5)

Change-Id: Ida408cb627145ba9faf473a78606f050c2f3f51c
Reviewed-on: https://go-review.googlesource.com/c/145208
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Munday <mike.munday@ibm.com>
2018-11-08 23:38:23 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api syscall: FreeBSD 12 ino64 support 2018-10-05 21:38:13 +00:00
doc cmd/asm: rename R18 to R18_PLATFORM on ARM64 2018-11-06 20:10:12 +00:00
lib/time lib/time: update vendored tzdata to release 2018e 2018-06-11 14:47:06 +00:00
misc cmd/vendor: update github.com/google/pprof 2018-11-07 12:27:21 +00:00
src cmd/compile: only optimize chained Moves on disjoint stack mem 2018-11-08 23:38:23 +00:00
test cmd/compile: encourage inlining of functions with single-call bodies 2018-11-08 17:29:23 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: add VMware as author, Venil Noronha as contributor 2018-08-31 02:14:24 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: add VMware as author, Venil Noronha as contributor 2018-08-31 02:14:24 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
robots.txt

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

Gopher image Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.

Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

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To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.