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Michael Munday 744ebfde04 cmd/compile: eliminate stores to unread auto variables
This is a crude compiler pass to eliminate stores to auto variables
that are only ever written to.

Eliminates an unnecessary store to x from the following code:

func f() int {
	var x := 1
	return *(&x)
}

Fixes #19765.

Change-Id: If2c63a8ae67b8c590b6e0cc98a9610939a3eeffa
Reviewed-on: https://go-review.googlesource.com/38746
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2017-08-24 16:53:56 +00:00
.github .github: update ISSUE_TEMPLATE to be closer to 'go bug' 2017-08-19 04:06:10 +00:00
api doc, api: add syscall.SysProcAttr.AmbientCaps change to 1.9 notes, API 2017-06-29 03:29:46 +00:00
doc doc/go1.9: fix typo in Moved GOROOT 2017-08-21 04:41:20 +00:00
lib/time time: vendor tzdata-2017b and update test 2017-06-07 21:23:58 +00:00
misc misc/ios: add support for device ids to the exec wrapper 2017-08-21 21:08:17 +00:00
src cmd/compile: eliminate stores to unread auto variables 2017-08-24 16:53:56 +00:00
test cmd/compile: eliminate stores to unread auto variables 2017-08-24 16:53:56 +00:00
.gitattributes
.gitignore .gitignore: include only Go project artifiacts 2017-08-15 21:37:05 +00:00
AUTHORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
CONTRIBUTING.md .github: recommend 'go bug' when filing an issue 2017-07-24 17:18:34 +00:00
CONTRIBUTORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
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README.md readme: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
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