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Russ Cox 9dd062b82e undo CL 102820043 / b0ce6dbafc18
Breaks 386 and arm builds.
The obvious reason is that this CL only edited 6g/gsubr.c
and failed to edit 5g/gsubr.c and 8g/gsubr.c.
However, the obvious CL applying the same edit to those
files (CL 101900043) causes mysterious build failures
in various of the standard package tests, usually involving
reflect. Something deep and subtle is broken but only on
the 32-bit systems.

Undo this CL for now.

««« original CL description
cmd/gc: fix x=x crash

The 'nodarg' function is used to obtain a Node*
representing a function argument or result.
It returned a brand new Node*, but that violates
the guarantee in most places in the compiler that
two Node*s refer to the same variable if and only if
they are the same Node* pointer. Reestablish that
invariant by making nodarg return a preexisting
named variable if present.

Having fixed that, avoid any copy during x=x in
componentgen, because the VARDEF we emit
before the copy marks the lhs x as dead incorrectly.

The change in walk.c avoids modifying the result
of nodarg. This was the only place in the compiler
that did so.

Fixes #8097.

LGTM=r, khr
R=golang-codereviews, r, khr
CC=golang-codereviews, iant
https://golang.org/cl/102820043
»»»

TBR=r
CC=golang-codereviews, khr
https://golang.org/cl/95660043
2014-05-28 21:46:20 -04:00
api regexp: hide one-pass code from exported API 2014-05-28 14:08:44 -04:00
doc doc/go1.3.html: math/big's Int and Rat implement TextMarshaler, TextUnmarshaler 2014-05-28 15:48:35 -04:00
include liblink: fix field tracking 2014-05-20 00:30:58 -04:00
lib lib/time/zoneinfo.zip: update to IANA release 2014c 2014-05-16 22:06:37 +00:00
misc misc/makerelease: upload files to Google Cloud Storage 2014-05-29 08:40:15 +10:00
src undo CL 102820043 / b0ce6dbafc18 2014-05-28 21:46:20 -04:00
test undo CL 102820043 / b0ce6dbafc18 2014-05-28 21:46:20 -04:00
.hgignore lib9: enable on Plan 9 2014-02-13 20:06:41 +01:00
.hgtags tag go1.3beta1 and go1.3beta2 2014-05-21 13:23:24 +10:00
AUTHORS A+C: Pietro Gagliardi (individual CLA) 2014-05-21 16:01:41 -07:00
CONTRIBUTORS A+C: Pietro Gagliardi (individual CLA) 2014-05-21 16:01:41 -07:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS
README README: Fix installation instructions 2013-11-20 13:47:37 -08:00
robots.txt

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For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install-source.html
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After installing Go, you can view a nicely formatted
doc/install-source.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install/source.

Unless otherwise noted, the Go source files are distributed
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--

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from sources by running all.bash (see doc/install.html).
You should also add the Go binary directory $GOROOT/bin
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For example, if you extracted the tar file into $HOME/go, you might
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See doc/install.html for more details.