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9dd062b82e
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 |
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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-source.html
in your web browser.
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
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.