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The Go programming language
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Without an explicit signal for a truncation, copy propagation will sometimes propagate a 32-bit truncation and end up overwriting uses of the original 64-bit value. The case that arose in practice is in C but I believe that the same could plausibly happen in Go. The main reason we didn't run into the same in Go is that I (perhaps incorrectly?) drop MOVL AX, AX during gins, so the truncation was never generated, so it didn't confuse the optimizer. Fixes #1315. Fixes #3488. R=ken2 CC=golang-dev https://golang.org/cl/6002043 |
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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.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
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--
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.