X87: Change num_double_registers() to num_allocatable_double_registers() for TestStackSlot.

X87: Change num_double_registers() to num_allocatable_double_registers() for TestStackSlot.

  Although x87 has 8 registers, it use only 1 double register in TurboFan code generation for some limitations.

  So for TestStackSlot() function, use the num_allocatable_double_registers() to check the avaliable double registers
  of TurboFan is more suitable than num_double_registers().

BUG=

Committed: https://crrev.com/a1a8dd141ee4071ec3f0cb9c71d76a4e606c1b44
Cr-Commit-Position: refs/heads/master@{#33636}

[zhengxing.li, 2016-02-01 01:44:32]

zhengxing.li@intel.com changed reviewers:
+ ahaas@chromium.org, chunyang.dai@intel.com, titzer@chromium.org,
weiliang.lin@intel.com

[zhengxing.li, 2016-02-01 01:44:33]

PTAL, thanks!

[ahaas, 2016-02-01 07:53:25]

lgtm

[titzer, 2016-02-01 08:02:02]

lgtm

[zhengxing.li, 2016-02-01 08:03:31]

The CQ bit was checked by zhengxing.li@intel.com

[commit-bot: I haz the power, 2016-02-01 08:03:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1653913002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1653913002/1

[commit-bot: I haz the power, 2016-02-01 08:25:07]

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

[commit-bot: I haz the power, 2016-02-01 08:25:07]

Try jobs failed on following builders:
  v8_linux_arm_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel/builds/13073)

[zhengxing.li, 2016-02-01 08:33:12]

The CQ bit was checked by zhengxing.li@intel.com

[commit-bot: I haz the power, 2016-02-01 08:33:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1653913002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1653913002/1

[commit-bot: I haz the power, 2016-02-01 08:47:24]

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

[commit-bot: I haz the power, 2016-02-01 08:47:25]

Try jobs failed on following builders:
  v8_linux_arm_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel/builds/13077)

[zhengxing.li, 2016-02-01 10:41:55]

The CQ bit was checked by zhengxing.li@intel.com

[commit-bot: I haz the power, 2016-02-01 10:42:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1653913002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1653913002/1

[commit-bot: I haz the power, 2016-02-01 10:53:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-01 10:54:39]

Description was changed from

==========
X87: Change num_double_registers() to num_allocatable_double_registers() for
TestStackSlot.

  Although x87 has 8 registers, it use only 1 double register in TurboFan code
generation for some limitations.

  So for TestStackSlot() function, use the num_allocatable_double_registers() to
check the avaliable double registers
  of TurboFan is more suitable than num_double_registers().

BUG=
==========

to

==========
X87: Change num_double_registers() to num_allocatable_double_registers() for
TestStackSlot.

  Although x87 has 8 registers, it use only 1 double register in TurboFan code
generation for some limitations.

  So for TestStackSlot() function, use the num_allocatable_double_registers() to
check the avaliable double registers
  of TurboFan is more suitable than num_double_registers().

BUG=

Committed: https://crrev.com/a1a8dd141ee4071ec3f0cb9c71d76a4e606c1b44
Cr-Commit-Position: refs/heads/master@{#33636}
==========

[commit-bot: I haz the power, 2016-02-01 10:54:40]

Patchset 1 (id:??) landed as
https://crrev.com/a1a8dd141ee4071ec3f0cb9c71d76a4e606c1b44
Cr-Commit-Position: refs/heads/master@{#33636}