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The Go programming language
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bbccfddb84
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Dave Cheney bbccfddb84 cmd/5g: avoid temporary during constant asop 
func add() int {
        var a int
        a += 10
        a += 20
        a += 30
        a -= 10
        a -= 20
        a -= 30
        return a
}

before

--- prog list "add" ---
0000 (/home/dfc/src/add.go:5) TEXT      add+0(SB),$0-4
0001 (/home/dfc/src/add.go:6) MOVW      $0,R2
0002 (/home/dfc/src/add.go:7) MOVW      $10,R0
0003 (/home/dfc/src/add.go:7) ADD       R0,R2,R1
0004 (/home/dfc/src/add.go:8) MOVW      $20,R0
0005 (/home/dfc/src/add.go:8) ADD       R0,R1
0006 (/home/dfc/src/add.go:9) MOVW      $30,R0
0007 (/home/dfc/src/add.go:9) ADD       R0,R1
0008 (/home/dfc/src/add.go:10) MOVW     $10,R0
0009 (/home/dfc/src/add.go:10) SUB      R0,R1
0010 (/home/dfc/src/add.go:11) MOVW     $20,R0
0011 (/home/dfc/src/add.go:11) SUB      R0,R1
0012 (/home/dfc/src/add.go:12) MOVW     $30,R0
0013 (/home/dfc/src/add.go:12) SUB      R0,R1,R2
0014 (/home/dfc/src/add.go:12) MOVW     R2,R0
0015 (/home/dfc/src/add.go:13) MOVW     R2,R1
0016 (/home/dfc/src/add.go:13) MOVW     R2,.noname+0(FP)
0017 (/home/dfc/src/add.go:13) RET      ,

after

--- prog list "add" ---
0000 (/home/dfc/src/add.go:5) TEXT      add+0(SB),$0-4
0001 (/home/dfc/src/add.go:6) MOVW      $0,R0
0002 (/home/dfc/src/add.go:7) ADD       $10,R0
0003 (/home/dfc/src/add.go:8) ADD       $20,R0
0004 (/home/dfc/src/add.go:9) ADD       $30,R0
0005 (/home/dfc/src/add.go:10) SUB      $10,R0
0006 (/home/dfc/src/add.go:11) SUB      $20,R0
0007 (/home/dfc/src/add.go:12) SUB      $30,R0,R2
0008 (/home/dfc/src/add.go:13) MOVW     R2,R0
0009 (/home/dfc/src/add.go:13) MOVW     R2,.noname+0(FP)
0010 (/home/dfc/src/add.go:13) RET      ,

R=rsc, minux.ma, remyoudompheng
CC=golang-dev
https://golang.org/cl/6584056
2012-10-06 21:01:49 +10:00
api cmd/api: add exception file 2012-10-04 11:35:17 +10:00
doc doc/codewalk: make it work with jQuery 1.8.2 2012-10-05 23:51:40 +08:00
include src: Add support for 64-bit version of Plan 9 2012-08-31 13:21:13 -04:00
lib lib/godoc/godoc.html: try Google hosted jQuery first, fallback to locally hosted one 2012-10-04 15:14:20 +08:00
misc misc/dashboard: set charset utf-8 on build log downloads 2012-10-03 08:16:27 -07:00
src cmd/5g: avoid temporary during constant asop 2012-10-06 21:01:49 +10:00
test runtime: fix a panic when growing zero-width-element slices. 2012-10-06 12:05:52 +02:00
.hgignore build: update Makefile to track source code dependencies better 2012-03-13 03:31:11 +08:00
.hgtags tag go1.0.3 2012-09-24 13:15:33 -05:00
AUTHORS A+C: add Jeff Wendling (Individual CLA) 2012-10-01 16:49:29 -04:00
CONTRIBUTORS A+C: add Jeff Wendling (Individual CLA) 2012-10-01 16:49:29 -04:00
favicon.ico add a favicon plus a couple of hi-res versions of gordon 2009-10-26 10:13:07 -07:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README build: update, streamline documentation for new $GOBIN 2010-08-24 20:00:50 -04:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

README 

This is the source code repository for the Go programming language.  

For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install.html in your web browser.

After installing Go, you can view a nicely formatted
doc/install.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install.html.

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

--

Binary Distribution Notes

If you have just untarred a binary Go distribution, you need to set
the environment variable $GOROOT to the full path of the go
directory (the one containing this README).  You can omit the
variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
You should also add the Go binary directory $GOROOT/bin
to your shell's path.

For example, if you extracted the tar file into $HOME/go, you might
put the following in your .profile:

    export GOROOT=$HOME/go
    export PATH=$PATH:$GOROOT/bin

See doc/install.html for more details.