qbit/go

mirror of https://github.com/golang/go synced 2024-09-29 19:24:33 -06:00

The Go programming language

Go to file

Michael Munday 44fe355694 cmd/compile: canonicalize comparison argument order Ensure that any comparison between two values has the same argument order. This helps ensure that they can be eliminated during the lowered CSE pass which will be particularly important if we eliminate the Greater and Geq ops (see #37316). Example: CMP R0, R1 BLT L1 CMP R1, R0 // different order, cannot eliminate BEQ L2 CMP R0, R1 BLT L1 CMP R0, R1 // same order, can eliminate BEQ L2 This does have some drawbacks. Notably comparisons might 'flip' direction in the assembly output after even small changes to the code or compiler. It should help make optimizations more reliable however. compilecmp master -> HEAD master (`218f4572f5`): text/template: make reflect.Value indirections more robust HEAD (f1661fef3e): cmd/compile: canonicalize comparison argument order platform: linux/amd64 file before after Δ % api 6063927 6068023 +4096 +0.068% asm 5191757 5183565 -8192 -0.158% cgo 4893518 4901710 +8192 +0.167% cover 5330345 5326249 -4096 -0.077% fix 3417778 3421874 +4096 +0.120% pprof 14889456 14885360 -4096 -0.028% test2json 2848138 2844042 -4096 -0.144% trace 11746239 11733951 -12288 -0.105% total 132739173 132722789 -16384 -0.012% Change-Id: I11736b3fe2a4553f6fc65018f475e88217fa22f9 Reviewed-on: https://go-review.googlesource.com/c/go/+/220425 Run-TryBot: Michael Munday <mike.munday@ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>		2020-02-26 10:32:22 +00:00
.github	.github: add link to questions in ISSUE_TEMPLATE	2020-01-06 17:05:31 +00:00
api	sync: add new Map method LoadAndDelete	2020-02-25 14:31:55 +00:00
doc	cmd/go/internal/{test,vet}: use a standard flag.FlagSet to parse flags	2020-02-25 20:54:34 +00:00
lib/time	lib/time: update tz data to 2019c	2019-11-26 12:03:08 +00:00
misc	misc/wasm: avoid implicit boolean to number conversion	2020-02-25 21:08:47 +00:00
src	cmd/compile: canonicalize comparison argument order	2020-02-26 10:32:22 +00:00
test	cmd/compile: canonicalize comparison argument order	2020-02-26 10:32:22 +00:00
.gitattributes
.gitignore
AUTHORS	A+C: change email address for Akhil Indurti	2019-09-09 15:30:38 +00:00
CONTRIBUTING.md
CONTRIBUTORS	CONTRIBUTORS: second round of updates for Go 1.14	2020-02-21 19:59:34 +00:00
favicon.ico
LICENSE
PATENTS
README.md	README: linkify some paths	2018-06-06 18:07:01 +00:00
robots.txt
SECURITY.md	SECURITY.md: update go versions	2019-09-26 15:34:57 +00:00

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 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.

Download and Install

Binary Distributions

Official binary distributions are available at https://golang.org/dl/.

After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source or load doc/install-source.html in your web browser for source installation instructions.

Contributing

Go is the work of thousands of contributors. We appreciate your help!

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.