HydrogenCodeStubs consume stack arguments via descriptor.

HydrogenCodeStubs consume stack arguments via descriptor.

All of this is controlled by the CallDescriptor. It's simply the case
that if you specify less registers than the function arity calls for,
the rest are assumed to be on the stack.

Bailout handlers accept these constant stack arguments too.

BUG=

Committed: https://crrev.com/3334b830a512eda1f8eed678a0e6fda52b23472a
Cr-Commit-Position: refs/heads/master@{#29813}

[mvstanton, 2015-07-21 12:43:49]

mvstanton@chromium.org changed reviewers:
+ danno@chromium.org

[mvstanton, 2015-07-21 12:43:50]

Hi Danno,
Here is the enhancement we discussed. The other platforms will look like x64,
continuing to use a register to pass a map to the transitioning store. I'll
upload them shortly...
--Michael

[mvstanton, 2015-07-23 07:02:32]

ping.

[danno, 2015-07-23 13:13:50]

On 2015/07/23 at 07:02:32, mvstanton wrote:
> ping.

Sorry for the long review, I didn't see it until your ping. My bad.

LGTM with a nit. Go ahead and land the entire CL if you like rather than
breaking it up, it all looks reasonable.

[mvstanton, 2015-07-23 13:34:51]

The CQ bit was checked by mvstanton@chromium.org

[mvstanton, 2015-07-23 13:34:51]

The patchset sent to the CQ was uploaded after l-g-t-m from danno@chromium.org
Link to the patchset: https://codereview.chromium.org/1250563004/#ps120001
(title: "REBASE.")

[commit-bot: I haz the power, 2015-07-23 13:34:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1250563004/120001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1250563004/120001

[commit-bot: I haz the power, 2015-07-23 14:00:06]

Committed patchset #7 (id:120001)

[commit-bot: I haz the power, 2015-07-23 14:00:26]

Patchset 7 (id:??) landed as
https://crrev.com/3334b830a512eda1f8eed678a0e6fda52b23472a
Cr-Commit-Position: refs/heads/master@{#29813}