tree f71a28932e72cfadcbbb3886530240b98a65cfe2
parent c93193aec0f33e901d6802e61c966286785f57ee
author Keith Randall <khr@golang.org> 1455300456 -0800
committer Keith Randall <khr@golang.org> 1455311241 +0000

cmd/compile: add write barrier to type switch

Type switches need write barriers if the written-to
variable is heap allocated.

For the added needwritebarrier call, the right arg doesn't
really matter, I just pass something that will never disqualify
the write barrier.  The left arg is the one that matters.

Fixes #14306

Change-Id: Ic2754167cce062064ea2eeac2944ea4f77cc9c3b
Reviewed-on: https://go-review.googlesource.com/19481
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>