X87: [Turbofan]: Use new MachineTypes in access-builder.

X87: [Turbofan]: Use new MachineTypes in access-builder.

  port 56429fc14671a10749190a4dfeacd38b7270f6f5 (r38978)

  original commit message:
  Introduced MachineType::TaggedSigned() and TaggedPointer().

  The idea is to quit using the representational dimension of Type, and
  instead encode this information in the MachineRepresentation (itself
  lightly wrapped in MachineType, along with MachineSemantic).

  There are three parts to the whole change:

  1) Places that set the machine representation - constant nodes, loads nad
     stores, global object and native context specialization.

  2) Places that propagate type/representation - this is representation
     inference (aka simplified lowering). At the end of this process we
     expect to have a MachineRepresentation for every node. An interesting
     part of this is phi merging.

  3) Places that examine representation - WriteBarrier elimination does this.
     Currently it's looking at the Type representation dimension, but as
     a part of this change (or in a soon-to-follow change) it can simply
     examine the MachineRepresentation.

BUG=

Committed: https://crrev.com/fdef413297c20467670c7289303a7a0c1d093d4c
Cr-Commit-Position: refs/heads/master@{#38993}

[zhengxing.li, 2016-08-30 03:43:39]

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

[zhengxing.li, 2016-08-30 03:43:39]

PTAL, thanks!

[Weiliang, 2016-08-30 06:07:55]

lgtm

[zhengxing.li, 2016-08-30 06:17:21]

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

[commit-bot: I haz the power, 2016-08-30 06:17:31]

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, 2016-08-30 06:39:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-30 06:39:52]

Description was changed from

==========
X87: [Turbofan]: Use new MachineTypes in access-builder.

  port 56429fc14671a10749190a4dfeacd38b7270f6f5 (r38978)

  original commit message:
  Introduced MachineType::TaggedSigned() and TaggedPointer().

  The idea is to quit using the representational dimension of Type, and
  instead encode this information in the MachineRepresentation (itself
  lightly wrapped in MachineType, along with MachineSemantic).

  There are three parts to the whole change:

  1) Places that set the machine representation - constant nodes, loads nad
     stores, global object and native context specialization.

  2) Places that propagate type/representation - this is representation
     inference (aka simplified lowering). At the end of this process we
     expect to have a MachineRepresentation for every node. An interesting
     part of this is phi merging.

  3) Places that examine representation - WriteBarrier elimination does this.
     Currently it's looking at the Type representation dimension, but as
     a part of this change (or in a soon-to-follow change) it can simply
     examine the MachineRepresentation.

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

to

==========
X87: [Turbofan]: Use new MachineTypes in access-builder.

  port 56429fc14671a10749190a4dfeacd38b7270f6f5 (r38978)

  original commit message:
  Introduced MachineType::TaggedSigned() and TaggedPointer().

  The idea is to quit using the representational dimension of Type, and
  instead encode this information in the MachineRepresentation (itself
  lightly wrapped in MachineType, along with MachineSemantic).

  There are three parts to the whole change:

  1) Places that set the machine representation - constant nodes, loads nad
     stores, global object and native context specialization.

  2) Places that propagate type/representation - this is representation
     inference (aka simplified lowering). At the end of this process we
     expect to have a MachineRepresentation for every node. An interesting
     part of this is phi merging.

  3) Places that examine representation - WriteBarrier elimination does this.
     Currently it's looking at the Type representation dimension, but as
     a part of this change (or in a soon-to-follow change) it can simply
     examine the MachineRepresentation.

BUG=

Committed: https://crrev.com/fdef413297c20467670c7289303a7a0c1d093d4c
Cr-Commit-Position: refs/heads/master@{#38993}
==========

[commit-bot: I haz the power, 2016-08-30 06:39:52]

Patchset 1 (id:??) landed as
https://crrev.com/fdef413297c20467670c7289303a7a0c1d093d4c
Cr-Commit-Position: refs/heads/master@{#38993}