An object with a deprecated Map which has already been cached in
CloneObjectIC feedback is still a valid Map for fast cloning --- but
to be consistent with other ICs, deprecated maps are ignored, and are
expected to be transitioned away from.
If the source object has a deprecated map, the instance is migrated.
BUG=v8:7611, chromium:867958, chromium:868586, chromium:869342, chromium:869347, chromium:869293
R=jkummerow@chromium.org, mvstanton@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1154143
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#54799}
Change-Id: I6e2f7b28c41bb9bd6255441da0f209a97bce5e8f
Reviewed-on: https://chromium-review.googlesource.com/1157142
Cr-Commit-Position: refs/heads/master@{#54830}
5caee70b66