[generators] Decouple generator resume from fullcodegen.

[generators] Decouple generator resume from fullcodegen.

Introduce a ResumeGeneratorTrampoline, which does the actual stack state
reconstruction (currently always restores a fullcodegen frame), and
introduce appropriate TurboFan builtins for %GeneratorPrototype%.next,
%GeneratorPrototype%.return and %GeneratorPrototype%.throw based on
this native builtin.

Also unify the flooding in case of step-in to always work based on
JSFunction and remove the special casing for JSGeneratorObject.

R=mstarzinger@chromium.org, neis@chromium.org
TBR=rossberg@chromium.org
BUG=chromium:513471
LOG=n

Committed: https://crrev.com/974721c66131d208571b8759a1caadf7f995c54c
Cr-Commit-Position: refs/heads/master@{#35283}

[Benedikt Meurer, 2016-04-06 06:44:49]

Michi: PTAL
Georg: FYI
Andreas: TBR'd for parser search-replace.

[Michael Starzinger, 2016-04-06 08:29:33]

LGTM. I like it.

https://codereview.chromium.org/1865833002/diff/1/src/deoptimizer.cc
File src/deoptimizer.cc (right):

https://codereview.chromium.org/1865833002/diff/1/src/deoptimizer.cc#newcode299
src/deoptimizer.cc:299: bool builtin = code->kind() == Code::BUILTIN;
Not actionable for this CL: As discussed offline, we really need a frame-type
for these JSFunction activations backed by BUILTIN code.

[Benedikt Meurer, 2016-04-06 08:34:43]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-04-06 08:34:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1865833002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1865833002/1

[commit-bot: I haz the power, 2016-04-06 08:37:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-06 08:39:39]

Description was changed from

==========
[generators] Decouple generator resume from fullcodegen.

Introduce a ResumeGeneratorTrampoline, which does the actual stack state
reconstruction (currently always restores a fullcodegen frame), and
introduce appropriate TurboFan builtins for %GeneratorPrototype%.next,
%GeneratorPrototype%.return and %GeneratorPrototype%.throw based on
this native builtin.

Also unify the flooding in case of step-in to always work based on
JSFunction and remove the special casing for JSGeneratorObject.

R=mstarzinger@chromium.org, neis@chromium.org
TBR=rossberg@chromium.org
BUG=chromium:513471
LOG=n
==========

to

==========
[generators] Decouple generator resume from fullcodegen.

Introduce a ResumeGeneratorTrampoline, which does the actual stack state
reconstruction (currently always restores a fullcodegen frame), and
introduce appropriate TurboFan builtins for %GeneratorPrototype%.next,
%GeneratorPrototype%.return and %GeneratorPrototype%.throw based on
this native builtin.

Also unify the flooding in case of step-in to always work based on
JSFunction and remove the special casing for JSGeneratorObject.

R=mstarzinger@chromium.org, neis@chromium.org
TBR=rossberg@chromium.org
BUG=chromium:513471
LOG=n

Committed: https://crrev.com/974721c66131d208571b8759a1caadf7f995c54c
Cr-Commit-Position: refs/heads/master@{#35283}
==========

[commit-bot: I haz the power, 2016-04-06 08:39:40]

Patchset 1 (id:??) landed as
https://crrev.com/974721c66131d208571b8759a1caadf7f995c54c
Cr-Commit-Position: refs/heads/master@{#35283}

[Michael Achenbach, 2016-04-06 09:58:08]

Please add skips for tests failing now ignition + win nosnap shared (or fix):
https://build.chromium.org/p/client.v8/builders/V8%20Win32%20-%20nosnap%20-%2...