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Keith Randall 807c80fce3 cmd/compile: using CONV instead of CONVNOP for interface conversions
We shouldn't use CONVNOP for conversions between two different
nonempty interface types, because we want to update the itab
in those situations.

Fixes #18595

After this CL, we are guaranteed that itabs are unique, that is
there is only one itab per compile-time-type/concrete type pair.
See also the tests in CL 35115 and 35116 which make sure this
invariant holds even for shared libraries and plugins.

Unique itabs are required for CL 34810 (faster type switch code).

R=go1.9

Change-Id: Id27d2e01ded706680965e4cb69d7c7a24ac2161b
Reviewed-on: https://go-review.googlesource.com/35119
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2017-02-06 20:00:05 +00:00
.github doc: improve issue template 2016-08-29 03:33:28 +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: consistently link to the SettingGOPATH page 2017-02-02 21:31:33 +00:00
lib/time lib/time: update tzdata to 2016j 2017-01-05 01:00:53 +00:00
misc runtime: handle SIGPIPE in c-archive and c-shared programs 2017-02-03 20:07:36 +00:00
src cmd/compile: using CONV instead of CONVNOP for interface conversions 2017-02-06 20:00:05 +00:00
test cmd/compile: using CONV instead of CONVNOP for interface conversions 2017-02-06 20:00:05 +00:00
.gitattributes
.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: update CONTRIBUTING.md a bit, mention proposal process 2017-01-06 23:19:01 +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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