X87: [turbofan] Collect invocation counts and compute relative call frequencies.

X87: [turbofan] Collect invocation counts and compute relative call frequencies.

  port c7d7ca361dd1ba399becd54ce0d9c6e53f76c870(r39410)

  original commit message:
  Add a notion of "invocation count" to the baseline compilers, which
  increment a special slot in the TypeFeedbackVector for each invocation
  of a given function (the optimized code doesn't currently collect this
  information).

  Use this invocation count to relativize the call counts on the call
  sites within the function, so that the inlining heuristic has a view
  of relative importance of a call site rather than some absolute numbers
  with unclear meaning for the current function. Also apply the call site
  frequency as a factor to all frequencies in the inlinee by passing this
  to the graph builders so that the importance of a call site in an
  inlinee is relative to the topmost optimized function.

  Note that all functions that neither have literals nor need type
  feedback slots will share a single invocation count cell in the
  canonical empty type feedback vector, so their invocation count is
  meaningless, but that doesn't matter since we only use the invocation
  count to relativize call counts within the function, which we only have
  if we have at least one type feedback vector (the CallIC slot).

  See the design document for additional details on this change:
  https://docs.google.com/document/d/1VoYBhpDhJC4VlqMXCKvae-8IGuheBGxy32EOgC2LnT8

BUG=

Committed: https://crrev.com/b6acda3a1069b0724042b26942b3452757aac3a2
Cr-Commit-Position: refs/heads/master@{#39490}

[zhengxing.li, 2016-09-18 03:30:45]

zhengxing.li@intel.com changed reviewers:
+ bmeurer@chromium.org, chunyang.dai@intel.com, weiliang.lin@intel.com

[zhengxing.li, 2016-09-18 03:30:45]

PTAL, thanks!

[Weiliang, 2016-09-18 05:11:37]

lgtm

[zhengxing.li, 2016-09-18 07:10:42]

The CQ bit was checked by zhengxing.li@intel.com

[commit-bot: I haz the power, 2016-09-18 07:10:48]

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, 2016-09-18 07:34:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-18 07:34:59]

Description was changed from

==========
X87: [turbofan] Collect invocation counts and compute relative call frequencies.

  port c7d7ca361dd1ba399becd54ce0d9c6e53f76c870(r39410)

  original commit message:
  Add a notion of "invocation count" to the baseline compilers, which
  increment a special slot in the TypeFeedbackVector for each invocation
  of a given function (the optimized code doesn't currently collect this
  information).

  Use this invocation count to relativize the call counts on the call
  sites within the function, so that the inlining heuristic has a view
  of relative importance of a call site rather than some absolute numbers
  with unclear meaning for the current function. Also apply the call site
  frequency as a factor to all frequencies in the inlinee by passing this
  to the graph builders so that the importance of a call site in an
  inlinee is relative to the topmost optimized function.

  Note that all functions that neither have literals nor need type
  feedback slots will share a single invocation count cell in the
  canonical empty type feedback vector, so their invocation count is
  meaningless, but that doesn't matter since we only use the invocation
  count to relativize call counts within the function, which we only have
  if we have at least one type feedback vector (the CallIC slot).

  See the design document for additional details on this change:
 
https://docs.google.com/document/d/1VoYBhpDhJC4VlqMXCKvae-8IGuheBGxy32EOgC2LnT8

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

to

==========
X87: [turbofan] Collect invocation counts and compute relative call frequencies.

  port c7d7ca361dd1ba399becd54ce0d9c6e53f76c870(r39410)

  original commit message:
  Add a notion of "invocation count" to the baseline compilers, which
  increment a special slot in the TypeFeedbackVector for each invocation
  of a given function (the optimized code doesn't currently collect this
  information).

  Use this invocation count to relativize the call counts on the call
  sites within the function, so that the inlining heuristic has a view
  of relative importance of a call site rather than some absolute numbers
  with unclear meaning for the current function. Also apply the call site
  frequency as a factor to all frequencies in the inlinee by passing this
  to the graph builders so that the importance of a call site in an
  inlinee is relative to the topmost optimized function.

  Note that all functions that neither have literals nor need type
  feedback slots will share a single invocation count cell in the
  canonical empty type feedback vector, so their invocation count is
  meaningless, but that doesn't matter since we only use the invocation
  count to relativize call counts within the function, which we only have
  if we have at least one type feedback vector (the CallIC slot).

  See the design document for additional details on this change:
 
https://docs.google.com/document/d/1VoYBhpDhJC4VlqMXCKvae-8IGuheBGxy32EOgC2LnT8

BUG=

Committed: https://crrev.com/b6acda3a1069b0724042b26942b3452757aac3a2
Cr-Commit-Position: refs/heads/master@{#39490}
==========

[commit-bot: I haz the power, 2016-09-18 07:35:00]

Patchset 1 (id:??) landed as
https://crrev.com/b6acda3a1069b0724042b26942b3452757aac3a2
Cr-Commit-Position: refs/heads/master@{#39490}