Link type feedback vectors to the shared function info.

Link type feedback vectors to the shared function info.

Previously, both type feedback vector and the shared function info
of a function points to the matching type feedback metadata. This
makes finding the shared function info of a type feedback vector
difficult.

Instead, we now point the type feeback vector to the shared function
info, and find the metadata through the shared function info.

Also remove the obsolete empty type feedback vector.

R=hpayer@chromium.org, mvstanton@chromium.org
BUG=v8:5808
Review-Url: https://codereview.chromium.org/2672363002
Cr-Commit-Position: refs/heads/master@{#43026}
Committed: https://chromium.googlesource.com/v8/v8/+/c78d7fa1aefb4544ace6b248fe6ac247bf5cbed3

[mvstanton, 2017-02-07 09:19:40]

LGTM. There is some overlap with Igor's in-flight CL
(https://codereview.chromium.org/2673383002/), he also gets rid of the dummy
feedback vector...

[Hannes Payer (out of office), 2017-02-07 11:49:35]

lgtm

[Yang, 2017-02-08 08:05:26]

The CQ bit was checked by yangguo@chromium.org

[Yang, 2017-02-08 08:05:26]

The patchset sent to the CQ was uploaded after l-g-t-m from hpayer@chromium.org,
mvstanton@chromium.org
Link to the patchset: https://codereview.chromium.org/2672363002/#ps20001
(title: "rebase")

[commit-bot: I haz the power, 2017-02-08 08:05:37]

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, 2017-02-08 08:33:34]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1486541126190340,
"parent_rev": "6516074960ecf23083d06463549652b240549158", "commit_rev":
"c78d7fa1aefb4544ace6b248fe6ac247bf5cbed3"}

[commit-bot: I haz the power, 2017-02-08 08:33:39]

Description was changed from

==========
Link type feedback vectors to the shared function info.

Previously, both type feedback vector and the shared function info
of a function points to the matching type feedback metadata. This
makes finding the shared function info of a type feedback vector
difficult.

Instead, we now point the type feeback vector to the shared function
info, and find the metadata through the shared function info.

Also remove the obsolete empty type feedback vector.

R=hpayer@chromium.org, mvstanton@chromium.org
BUG=v8:5808
==========

to

==========
Link type feedback vectors to the shared function info.

Previously, both type feedback vector and the shared function info
of a function points to the matching type feedback metadata. This
makes finding the shared function info of a type feedback vector
difficult.

Instead, we now point the type feeback vector to the shared function
info, and find the metadata through the shared function info.

Also remove the obsolete empty type feedback vector.

R=hpayer@chromium.org, mvstanton@chromium.org
BUG=v8:5808

Review-Url: https://codereview.chromium.org/2672363002
Cr-Commit-Position: refs/heads/master@{#43026}
Committed:
https://chromium.googlesource.com/v8/v8/+/c78d7fa1aefb4544ace6b248fe6ac247bf5...
==========

[commit-bot: I haz the power, 2017-02-08 08:33:39]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/v8/v8/+/c78d7fa1aefb4544ace6b248fe6ac247bf5...