ARM64: remove stack pushes without frame in RegExpExecStub.

ARM64: remove stack pushes without frame in RegExpExecStub.

RegExpExecStub pushes callee-saved registers without setting up a frame. This confuses the stack iterator.

Other architectures do not save these registers.

BUG=chromium:487981
LOG=NO
TEST=mjsunit/regress/regress-487981

Committed: https://crrev.com/19cdd00d092067edf85e64c6567ec769843a53c2
Cr-Commit-Position: refs/heads/master@{#29120}

[ulan, 2015-06-18 13:48:03]

ulan@chromium.org changed reviewers:
+ bmeurer@chromium.org, jacob.bramley@arm.com

[ulan, 2015-06-18 13:48:03]

PTAL

[jbramley, 2015-06-18 14:19:12]

lgtm

[ulan, 2015-06-18 14:27:21]

The CQ bit was checked by ulan@chromium.org

[commit-bot: I haz the power, 2015-06-18 14:27:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1183593005/1

[commit-bot: I haz the power, 2015-06-18 14:49:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-18 14:49:26]

Try jobs failed on following builders:
  v8_linux_arm64_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm64_rel/builds/6780)

[ulan, 2015-06-18 15:19:54]

The CQ bit was checked by ulan@chromium.org

[ulan, 2015-06-18 15:19:55]

The patchset sent to the CQ was uploaded after l-g-t-m from
jacob.bramley@arm.com
Link to the patchset: https://codereview.chromium.org/1183593005/#ps20001
(title: "Fix offsets")

[commit-bot: I haz the power, 2015-06-18 15:20:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1183593005/20001

[commit-bot: I haz the power, 2015-06-18 15:45:22]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-06-18 15:45:45]

Patchset 2 (id:??) landed as
https://crrev.com/19cdd00d092067edf85e64c6567ec769843a53c2
Cr-Commit-Position: refs/heads/master@{#29120}