Build stack frames for stubs only when needed.

Build stack frames for stubs only when needed.

The heuristic is quite naive at the moment (build a frame iff the
register allocator needed spill slots), we can improve that later.

Committed: https://crrev.com/0914181d97665ff1d34b2ef0d57c41d37f9de124
Cr-Commit-Position: refs/heads/master@{#26664}

[Sven Panne, 2015-02-16 12:58:06]

svenpanne@chromium.org changed reviewers:
+ titzer@chromium.org

[titzer, 2015-02-16 12:59:55]

Can you go ahead and do MIPS as well? Should be similar.

[Sven Panne, 2015-02-16 13:09:17]

On 2015/02/16 12:59:55, titzer wrote:
> Can you go ahead and do MIPS as well? Should be similar.

Done...

[titzer, 2015-02-16 13:09:47]

lgtm

[Sven Panne, 2015-02-16 13:11:52]

The CQ bit was checked by svenpanne@chromium.org

[commit-bot: I haz the power, 2015-02-16 13:12:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/933603002/20001

[commit-bot: I haz the power, 2015-02-16 13:44:56]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-16 13:45:09]

Patchset 2 (id:??) landed as
https://crrev.com/0914181d97665ff1d34b2ef0d57c41d37f9de124
Cr-Commit-Position: refs/heads/master@{#26664}