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David Crawshaw 6f31abd23a cmd/compile, cmd/link: weak relocation for ptrTo
Introduce R_WEAKADDROFF, a "weak" variation of the R_ADDROFF relocation
that will only reference the type described if it is in some other way
reachable.

Use this for the ptrToThis field in reflect type information where it
is safe to do so (that is, types that don't need to be included for
interface satisfaction, and types that won't cause the compiler to
recursively generate an endless series of ptr-to-ptr-to-ptr-to...
types).

Also fix a small bug in reflect, where StructOf was not clearing the
ptrToThis field of new types.

Fixes #17931

Change-Id: I4d3b53cb9c916c97b3b16e367794eee142247281
Reviewed-on: https://go-review.googlesource.com/33427
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2016-11-22 03:10:14 +00:00
.github doc: improve issue template 2016-08-29 03:33:28 +00:00
api api, doc: update go1.8.txt and next.txt 2016-11-16 01:19:56 +00:00
doc spec: add subtitles to section on "for" statements 2016-11-18 20:26:11 +00:00
lib/time lib/time: update tzdata to 2016i 2016-11-10 19:14:51 +00:00
misc misc/cgo/testcshared: add explicit ./ to shared library argument 2016-11-19 04:31:36 +00:00
src cmd/compile, cmd/link: weak relocation for ptrTo 2016-11-22 03:10:14 +00:00
test cmd/compile: in cse, allow for new ssa values 2016-11-18 16:31:27 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore cmd/go: fail with nice error message on bad GOOS/GOARCH pair 2016-05-06 01:18:07 +00:00
AUTHORS A+C: update for Go 1.8 2016-11-10 19:35:02 +00:00
CONTRIBUTING.md doc: use new Gerrit URL and mention our instance in CONTRIBUTING.md 2016-03-09 00:52:42 +00:00
CONTRIBUTORS A+C: update for Go 1.8 2016-11-10 19:35:02 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md readme: emphasize issue tracker is for bugs/proposals 2015-10-02 18:44:14 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
robots.txt

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