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Austin Clements c8ca793176 cmd/compile: mark memclrHasPointers calls as write barriers
There are two places where the compiler generates memclrHasPointers
calls. These are effectively write barriers, but the compiler doesn't
currently record them as such in the function. As a result code like

  for i := range a {
    a[i] = nil
  }

inserts a write barrier for the assignment to a[i], but the compiler
doesn't report this. Hence, it's not reported in the -d=wb output, and
it's not checked against //go:nowritebarrier annotations.

Change-Id: I40299ebc9824f05cf516cba494d4c086b80ffb53
Reviewed-on: https://go-review.googlesource.com/c/152722
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2018-12-05 21:54:52 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api syscall: FreeBSD 12 ino64 support 2018-10-05 21:38:13 +00:00
doc doc/go1.12: add some package release notes 2018-12-05 16:16:14 +00:00
lib/time lib/time: update tzdata to 2018g 2018-11-28 08:22:56 +00:00
misc cmd/cgo: reject names that are likely to be mangled C name 2018-12-05 14:12:14 +00:00
src cmd/compile: mark memclrHasPointers calls as write barriers 2018-12-05 21:54:52 +00:00
test cmd/compile: avoid multiple errors regarding misuse of ... in signatures 2018-12-05 20:59:58 +00:00
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