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Matthew Dempsky 794f1ebff7 cmd/compile: simplify needwritebarrier
Currently, whether we need a write barrier is simply a property of the
pointer slot being written to.

The only optimization we currently apply using the value being written
is that pointers to stack variables can omit write barriers because
they're only written to stack slots... but we already omit write
barriers for all writes to the stack anyway.

Passes toolstash -cmp.

Change-Id: I7f16b71ff473899ed96706232d371d5b2b7ae789
Reviewed-on: https://go-review.googlesource.com/37109
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-02-16 22:42:36 +00:00
.github doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
api Revert "cmd/go: note when some Go files were ignored on no-Go-files errors" 2016-12-21 05:25:57 +00:00
doc doc: document go1.8 2017-02-16 16:36:59 +00:00
lib/time lib/time: update tzdata to 2016j 2017-01-05 01:00:53 +00:00
misc runtime: enable/disable SIGPROF if needed when profiling 2017-02-09 18:53:34 +00:00
src cmd/compile: simplify needwritebarrier 2017-02-16 22:42:36 +00:00
test cmd/compile/internal/syntax: better errors and recovery for invalid character literals 2017-02-16 21:46:43 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore cmd/dist: move cmd/go z files to cmd/go/internal/cfg 2017-02-03 20:30:52 +00:00
AUTHORS A+C: automated update 2016-12-21 03:22:22 +00:00
CONTRIBUTING.md doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
CONTRIBUTORS A+C: automated update 2016-12-21 03:22:22 +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
PATENTS
README.md readme: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
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