[heap] Remove size specializations in static object visitors.

[heap] Remove size specializations in static object visitors.

Apart from that this patch adds kVisitJSObjectFast for JSObjects that
do not have any unboxed double fields and can be visited without
run-time layout check.

BUG=chromium:694255
Review-Url: https://codereview.chromium.org/2763413007
Cr-Commit-Position: refs/heads/master@{#44237}
Committed: https://chromium.googlesource.com/v8/v8/+/dbb1cbe3a85d5c5528ce876d905e78d2ab35f00b

[ulan, 2017-03-24 14:41:06]

Description was changed from

==========
[heap] Remove size specializations in static object visitors.

BUG=
==========

to

==========
[heap] Remove size specializations in static object visitors.

Apart from that this patch adds kVisitJSObjectFast for JSObjects that
do not have any unboxed double fields and can be visited without
run-time layout check.

BUG=
==========

[ulan, 2017-03-24 14:41:22]

ulan@chromium.org changed reviewers:
+ hpayer@chromium.org, mlippautz@chromium.org

[ulan, 2017-03-24 14:41:22]

ptal

[ulan, 2017-03-24 14:41:49]

Description was changed from

==========
[heap] Remove size specializations in static object visitors.

Apart from that this patch adds kVisitJSObjectFast for JSObjects that
do not have any unboxed double fields and can be visited without
run-time layout check.

BUG=
==========

to

==========
[heap] Remove size specializations in static object visitors.

Apart from that this patch adds kVisitJSObjectFast for JSObjects that
do not have any unboxed double fields and can be visited without
run-time layout check.

BUG=chromium:694255
==========

[ulan, 2017-03-27 11:23:24]

Added faster version of SizeOf, which is important for scavenger.

https://codereview.chromium.org/2763413007/diff/60001/src/objects-body-descri...
File src/objects-body-descriptors-inl.h (right):

https://codereview.chromium.org/2763413007/diff/60001/src/objects-body-descri...
src/objects-body-descriptors-inl.h:134: class JSObject::FastBodyDescriptor final
: public BodyDescriptorBase {
This is the same as FlexibleBodyDescriptor except for SizeOf, which is much
faster here.

[ulan, 2017-03-29 14:46:41]

ping

[Michael Lippautz, 2017-03-29 14:54:07]

lgtm

[ulan, 2017-03-29 14:55:40]

The CQ bit was checked by ulan@chromium.org

[commit-bot: I haz the power, 2017-03-29 14:55:43]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-29 15:21:49]

CQ is committing da patch.

Bot data: {"patchset_id": 60001, "attempt_start_ts": 1490799340455410,
"parent_rev": "d0c06a7b95c5148284cf1185490e944a2b5ddd31", "commit_rev":
"dbb1cbe3a85d5c5528ce876d905e78d2ab35f00b"}

[commit-bot: I haz the power, 2017-03-29 15:21:54]

Description was changed from

==========
[heap] Remove size specializations in static object visitors.

Apart from that this patch adds kVisitJSObjectFast for JSObjects that
do not have any unboxed double fields and can be visited without
run-time layout check.

BUG=chromium:694255
==========

to

==========
[heap] Remove size specializations in static object visitors.

Apart from that this patch adds kVisitJSObjectFast for JSObjects that
do not have any unboxed double fields and can be visited without
run-time layout check.

BUG=chromium:694255

Review-Url: https://codereview.chromium.org/2763413007
Cr-Commit-Position: refs/heads/master@{#44237}
Committed:
https://chromium.googlesource.com/v8/v8/+/dbb1cbe3a85d5c5528ce876d905e78d2ab3...
==========

[commit-bot: I haz the power, 2017-03-29 15:21:55]

Committed patchset #4 (id:60001) as
https://chromium.googlesource.com/v8/v8/+/dbb1cbe3a85d5c5528ce876d905e78d2ab3...

[ulan, 2017-04-06 18:55:05]

A revert of this CL (patchset #4 id:60001) has been created in
https://codereview.chromium.org/2800923004/ by ulan@chromium.org.

The reason for reverting is: Speculative revert due to canary crashes.

BUG=chromium:708339,chromium:707790.