[arm] CheckConstPool between TF instructions.

[arm] CheckConstPool between TF instructions.

Some TurboFan instructions block the literal pool for their entire
duration. If a long enough sequence of these instructions is
encountered, the literal pool can be blocked until it goes out of range.

BUG=v8:4292
LOG=

[jbramley, 2015-07-10 14:21:09]

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

[Benedikt Meurer, 2015-07-13 04:53:38]

LGTM. Although I'd prefer something more robust on the Assembler level.

[Benedikt Meurer, 2015-07-13 04:53:43]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-07-13 04:53:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1236603002/1

[commit-bot: I haz the power, 2015-07-13 04:53:52]

The author jacob.bramley@arm.com has not signed Google Contributor License
Agreement. Please visit https://cla.developers.google.com to sign and manage
CLA.

[commit-bot: I haz the power, 2015-07-13 05:00:47]

The author jacob.bramley@arm.com has not signed Google Contributor License
Agreement. Please visit https://cla.developers.google.com to sign and manage
CLA.

[Benedikt Meurer, 2015-07-13 05:02:37]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2015-07-13 05:05:22]

Committing as https://codereview.chromium.org/1232343002 (you used the wrong
account, no CLA).