Make context register implicit for CallInterfaceDescriptors

Make context register implicit for CallInterfaceDescriptors

Up until now the context register was listed explicitly in each stub's
CallInterfaceDescriptor. This was problematic, because it was listed
first in the list of register parameters--which is fine for Crankshaft,
which is more or less built to handle the context as the first
parameter-- but not ideal for TurboFan, which adds the context at
the end of all function parameters. Now the context register is no
longer in the register list and can be handled appropriately by both
compilers. Specifically, this allows the FunctionType specified for
each CallInterfaceDescriptor to exactly match the parameter register
list.

Committed: https://crrev.com/7015fd20531ee8498352f82d626c78023a1f6857
Cr-Commit-Position: refs/heads/master@{#29402}

[danno, 2015-06-30 20:28:42]

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

[danno, 2015-06-30 20:29:16]

PTAL

[mvstanton, 2015-07-01 08:33:25]

Hi Danno,
LGTM, just one question. If you can keep the const it would be nice.
right on,
--Michael

https://codereview.chromium.org/1211333003/diff/80001/src/code-stubs.h
File src/code-stubs.h (right):

https://codereview.chromium.org/1211333003/diff/80001/src/code-stubs.h#newcod...
src/code-stubs.h:217: virtual CallInterfaceDescriptor
GetCallInterfaceDescriptor() const = 0;
Why do you have to take const away?

[danno, 2015-07-01 08:43:16]

https://codereview.chromium.org/1211333003/diff/80001/src/code-stubs.h
File src/code-stubs.h (right):

https://codereview.chromium.org/1211333003/diff/80001/src/code-stubs.h#newcod...
src/code-stubs.h:217: virtual CallInterfaceDescriptor
GetCallInterfaceDescriptor() const = 0;
On 2015/07/01 08:33:24, mvstanton wrote:
> Why do you have to take const away?

I'm not taking it away... I'm adding it ;-)

[danno, 2015-07-01 08:43:20]

The CQ bit was checked by danno@chromium.org

[commit-bot: I haz the power, 2015-07-01 08:43:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1211333003/80001

[commit-bot: I haz the power, 2015-07-01 08:45:11]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2015-07-01 08:45:21]

Patchset 5 (id:??) landed as
https://crrev.com/7015fd20531ee8498352f82d626c78023a1f6857
Cr-Commit-Position: refs/heads/master@{#29402}