PPC/s390: Inline Array.prototype.forEach in TurboFan

PPC/s390: Inline Array.prototype.forEach in TurboFan

Port 90c3a2d54b956d06ace2c97c6bfdb10ea9cb8e58

Original Commit Message:

    This CL contains a few pieces:

    - A new mechanism to create "BuiltinContinuation" checkpoints in TurboFan
      graphs, which--when triggered--swizzle the values in the the FrameState to be
      parameters to a typically TF-generated builtin that resumes execution to finish
      the slow-case functionality.
    - Continuation builtins that have special handling in the deoptimizer and their own
      new frame type to ensure that the values they need to begin executing can be stashed
      away and restored immediately before the builtin is called via a trampoline that runs
      when the continuation builtin's frame execution resumes.
    - An implementation of Array.prototype.forEach in TurboFan that can be used to
      inline it. The inlined forEach implementation uses the checkpoints mechanism
      described above to deopt in the middle of the forEach in the cases that optimization
      invariants are violated. There is a slightly different continuation stub for each
      deopt point in the forEach implementation to ensure the correct side-effects, i.e.
      that the deopt of the builtin isn't programmatically observable.

R=danno@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2926043005
Cr-Commit-Position: refs/heads/master@{#45798}
Committed: https://chromium.googlesource.com/v8/v8/+/0732cbee894c0e518db9c2f337be3794aa46a681

[JaideepBajwa, 2017-06-08 21:07:00]

ptal

[john.yan, 2017-06-08 21:09:05]

lgtm

[JaideepBajwa, 2017-06-08 21:09:48]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2017-06-08 21:09:51]

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, 2017-06-08 21:34:23]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1496956188142580, "parent_rev":
"195eab4619ace704d34ebd00b197ff8d7c739df7", "commit_rev":
"0732cbee894c0e518db9c2f337be3794aa46a681"}

[commit-bot: I haz the power, 2017-06-08 21:34:29]

Description was changed from

==========
PPC/s390: Inline Array.prototype.forEach in TurboFan

Port 90c3a2d54b956d06ace2c97c6bfdb10ea9cb8e58

Original Commit Message:

    This CL contains a few pieces:

    - A new mechanism to create "BuiltinContinuation" checkpoints in TurboFan
      graphs, which--when triggered--swizzle the values in the the FrameState to
be
      parameters to a typically TF-generated builtin that resumes execution to
finish
      the slow-case functionality.
    - Continuation builtins that have special handling in the deoptimizer and
their own
      new frame type to ensure that the values they need to begin executing can
be stashed
      away and restored immediately before the builtin is called via a
trampoline that runs
      when the continuation builtin's frame execution resumes.
    - An implementation of Array.prototype.forEach in TurboFan that can be used
to
      inline it. The inlined forEach implementation uses the checkpoints
mechanism
      described above to deopt in the middle of the forEach in the cases that
optimization
      invariants are violated. There is a slightly different continuation stub
for each
      deopt point in the forEach implementation to ensure the correct
side-effects, i.e.
      that the deopt of the builtin isn't programmatically observable.

R=danno@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=
LOG=N
==========

to

==========
PPC/s390: Inline Array.prototype.forEach in TurboFan

Port 90c3a2d54b956d06ace2c97c6bfdb10ea9cb8e58

Original Commit Message:

    This CL contains a few pieces:

    - A new mechanism to create "BuiltinContinuation" checkpoints in TurboFan
      graphs, which--when triggered--swizzle the values in the the FrameState to
be
      parameters to a typically TF-generated builtin that resumes execution to
finish
      the slow-case functionality.
    - Continuation builtins that have special handling in the deoptimizer and
their own
      new frame type to ensure that the values they need to begin executing can
be stashed
      away and restored immediately before the builtin is called via a
trampoline that runs
      when the continuation builtin's frame execution resumes.
    - An implementation of Array.prototype.forEach in TurboFan that can be used
to
      inline it. The inlined forEach implementation uses the checkpoints
mechanism
      described above to deopt in the middle of the forEach in the cases that
optimization
      invariants are violated. There is a slightly different continuation stub
for each
      deopt point in the forEach implementation to ensure the correct
side-effects, i.e.
      that the deopt of the builtin isn't programmatically observable.

R=danno@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2926043005
Cr-Commit-Position: refs/heads/master@{#45798}
Committed:
https://chromium.googlesource.com/v8/v8/+/0732cbee894c0e518db9c2f337be3794aa4...
==========

[commit-bot: I haz the power, 2017-06-08 21:34:30]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/0732cbee894c0e518db9c2f337be3794aa4...