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David Chase 9664bc1d1f cmd/compile: fix phi-function updates for preemptible loops
Previous code failed to account for particular control flow
involving nested loops when updating phi function inputs.
Fix involves:
1) remove incorrect shortcut
2) generate a "better" order for children in dominator tree
3) note inner-loop updates and check before applying
   outer-loop updates.

Fixes #20675.

Change-Id: I2fe21470604b5c259e777ad8b15de95f7706894d
Reviewed-on: https://go-review.googlesource.com/45791
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-07-14 15:54:13 +00:00
.github doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +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: add missing article 2017-07-13 17:53:10 +00:00
lib/time time: vendor tzdata-2017b and update test 2017-06-07 21:23:58 +00:00
misc cmd/cgo: unwrap typedef-chains before type checking 2017-06-27 23:02:34 +00:00
src cmd/compile: fix phi-function updates for preemptible loops 2017-07-14 15:54:13 +00:00
test test: deflake chan/select3.go 2017-07-08 02:10:12 +00:00
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.gitignore .gitignore: change path to zbootstrap.go 2017-04-19 02:13:58 +00:00
AUTHORS A+C: updated update 2017-06-20 23:27:06 +00:00
CONTRIBUTING.md doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
CONTRIBUTORS A+C: updated update 2017-06-20 23:27:06 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
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