[turbofan] Introduce an ExternalPointer type.

[turbofan] Introduce an ExternalPointer type.

This adds a new ExternalPointer type, which is an Internal type that is
used for ExternalReferences and other pointer values, like the pointers
into the asm.js heap. It also adds a PointerConstant operator, which we
use to represents these raw constants (we can probably remove that
particular operator again once WebAssembly ships with the validator).

R=mvstanton@chromium.org
BUG=v8:5267, v8:5270
Committed: https://crrev.com/7d24f1aefa89a8fe691d7820e39e424eef407df4
Cr-Commit-Position: refs/heads/master@{#40923}

[Benedikt Meurer, 2016-11-11 10:41:49]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-11 10:42:00]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[mvstanton, 2016-11-11 10:47:37]

Nice cleanup! LGTM

[Benedikt Meurer, 2016-11-11 10:53:21]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-11-11 10:53:27]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-11-11 10:53:31]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-11 11:22:23]

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

[commit-bot: I haz the power, 2016-11-11 11:22:24]

Try jobs failed on following builders:
  v8_win_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_win_rel_ng/builds/17719)
  v8_win_rel_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_win_rel_ng_triggered/bui...)

[Benedikt Meurer, 2016-11-11 11:45:52]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-11 11:46:00]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Benedikt Meurer, 2016-11-11 11:47:10]

The CQ bit was unchecked by bmeurer@chromium.org

[Benedikt Meurer, 2016-11-11 11:47:14]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-11-11 11:47:14]

The patchset sent to the CQ was uploaded after l-g-t-m from
mvstanton@chromium.org
Link to the patchset: https://codereview.chromium.org/2494753003/#ps20001
(title: "Also fix CodeGenerator for 32-bit.")

[commit-bot: I haz the power, 2016-11-11 11:47:19]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-11 12:01:28]

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

[commit-bot: I haz the power, 2016-11-11 12:01:31]

Try jobs failed on following builders:
  v8_linux64_avx2_rel_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_avx2_rel_ng/buil...)
  v8_linux64_avx2_rel_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_avx2_rel_ng_trig...)
  v8_linux_dbg_ng on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_dbg_ng/builds/16101)
  v8_linux_dbg_ng_triggered on master.tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_dbg_ng_triggered/b...)

[Benedikt Meurer, 2016-11-11 12:07:16]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-11-11 12:07:17]

The patchset sent to the CQ was uploaded after l-g-t-m from
mvstanton@chromium.org
Link to the patchset: https://codereview.chromium.org/2494753003/#ps40001
(title: "Stronger ducktape.")

[commit-bot: I haz the power, 2016-11-11 12:07:26]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-11 13:04:14]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-11-17 22:30:38]

Description was changed from

==========
[turbofan] Introduce an ExternalPointer type.

This adds a new ExternalPointer type, which is an Internal type that is
used for ExternalReferences and other pointer values, like the pointers
into the asm.js heap. It also adds a PointerConstant operator, which we
use to represents these raw constants (we can probably remove that
particular operator again once WebAssembly ships with the validator).

R=mvstanton@chromium.org
BUG=v8:5267,v8:5270
==========

to

==========
[turbofan] Introduce an ExternalPointer type.

This adds a new ExternalPointer type, which is an Internal type that is
used for ExternalReferences and other pointer values, like the pointers
into the asm.js heap. It also adds a PointerConstant operator, which we
use to represents these raw constants (we can probably remove that
particular operator again once WebAssembly ships with the validator).

R=mvstanton@chromium.org
BUG=v8:5267,v8:5270

Committed: https://crrev.com/7d24f1aefa89a8fe691d7820e39e424eef407df4
Cr-Commit-Position: refs/heads/master@{#40923}
==========

[commit-bot: I haz the power, 2016-11-17 22:30:39]

Patchset 3 (id:??) landed as
https://crrev.com/7d24f1aefa89a8fe691d7820e39e424eef407df4
Cr-Commit-Position: refs/heads/master@{#40923}