Revert of [turbofan] ChangeFloat64ToTagged shouldn't canonicalize.

Revert of [turbofan] ChangeFloat64ToTagged shouldn't canonicalize. (patchset #6 id:100001 of https://codereview.chromium.org/2367593003/ )

Reason for revert:
Still blows up on the main waterfall even after Jakob's fix:

https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps/Check/logs/typedarray-indexing
https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps/Check/logs/typedarray
https://build.chromium.org/p/client.v8/builders/V8%20Win64/builds/12982/steps/Check/logs/typedarray

Original issue's description:
> [turbofan] ChangeFloat64ToTagged shouldn't canonicalize.
>
> This matches current Crankshaft/fullcodegen behavior more closely and
> thus reduces the chances that we run into unnecessary polymorphism due
> to the field representation tracking in our object model.
>
> R=jarin@chromium.org
> BUG=v8:5267
>
> Committed: https://chromium.googlesource.com/v8/v8/+/6a939714e991ebf10d56ddbd2869325cca99c0ef
> Committed: https://crrev.com/ee158e6c4cc896479a32245432a3c2fdd31bcb73
> Committed: https://crrev.com/ddf792beb3a72f6dba83e94fc8ada03ebf1630bd
> Cr-Original-Commit-Position: refs/heads/master@{#39692}
> Cr-Commit-Position: refs/heads/master@{#39748}

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5267
Committed: https://crrev.com/76b68915b3b87ac6da9408a4d5d756cfe0440d8b
Cr-Commit-Position: refs/heads/master@{#39749}

[Benedikt Meurer, 2016-09-27 05:10:29]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-09-27 05:10:29]

Created Revert of [turbofan] ChangeFloat64ToTagged shouldn't canonicalize.

[commit-bot: I haz the power, 2016-09-27 05:10:34]

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, 2016-09-27 05:10:46]

Description was changed from

==========
Revert of [turbofan] ChangeFloat64ToTagged shouldn't canonicalize. (patchset #6
id:100001 of https://codereview.chromium.org/2367593003/ )

Reason for revert:
Still blows up on the main waterfall even after Jakob's fix:

https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps...
https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps...
https://build.chromium.org/p/client.v8/builders/V8%20Win64/builds/12982/steps...

Original issue's description:
> [turbofan] ChangeFloat64ToTagged shouldn't canonicalize.
> 
> This matches current Crankshaft/fullcodegen behavior more closely and
> thus reduces the chances that we run into unnecessary polymorphism due
> to the field representation tracking in our object model.
> 
> R=jarin@chromium.org
> BUG=v8:5267
> 
> Committed:
https://chromium.googlesource.com/v8/v8/+/6a939714e991ebf10d56ddbd2869325cca9...
> Committed: https://crrev.com/ee158e6c4cc896479a32245432a3c2fdd31bcb73
> Committed: https://crrev.com/ddf792beb3a72f6dba83e94fc8ada03ebf1630bd
> Cr-Original-Commit-Position: refs/heads/master@{#39692}
> Cr-Commit-Position: refs/heads/master@{#39748}

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5267
==========

to

==========
Revert of [turbofan] ChangeFloat64ToTagged shouldn't canonicalize. (patchset #6
id:100001 of https://codereview.chromium.org/2367593003/ )

Reason for revert:
Still blows up on the main waterfall even after Jakob's fix:

https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps...
https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps...
https://build.chromium.org/p/client.v8/builders/V8%20Win64/builds/12982/steps...

Original issue's description:
> [turbofan] ChangeFloat64ToTagged shouldn't canonicalize.
> 
> This matches current Crankshaft/fullcodegen behavior more closely and
> thus reduces the chances that we run into unnecessary polymorphism due
> to the field representation tracking in our object model.
> 
> R=jarin@chromium.org
> BUG=v8:5267
> 
> Committed:
https://chromium.googlesource.com/v8/v8/+/6a939714e991ebf10d56ddbd2869325cca9...
> Committed: https://crrev.com/ee158e6c4cc896479a32245432a3c2fdd31bcb73
> Committed: https://crrev.com/ddf792beb3a72f6dba83e94fc8ada03ebf1630bd
> Cr-Original-Commit-Position: refs/heads/master@{#39692}
> Cr-Commit-Position: refs/heads/master@{#39748}

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5267
==========

[commit-bot: I haz the power, 2016-09-27 05:10:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-27 05:11:06]

Description was changed from

==========
Revert of [turbofan] ChangeFloat64ToTagged shouldn't canonicalize. (patchset #6
id:100001 of https://codereview.chromium.org/2367593003/ )

Reason for revert:
Still blows up on the main waterfall even after Jakob's fix:

https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps...
https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps...
https://build.chromium.org/p/client.v8/builders/V8%20Win64/builds/12982/steps...

Original issue's description:
> [turbofan] ChangeFloat64ToTagged shouldn't canonicalize.
> 
> This matches current Crankshaft/fullcodegen behavior more closely and
> thus reduces the chances that we run into unnecessary polymorphism due
> to the field representation tracking in our object model.
> 
> R=jarin@chromium.org
> BUG=v8:5267
> 
> Committed:
https://chromium.googlesource.com/v8/v8/+/6a939714e991ebf10d56ddbd2869325cca9...
> Committed: https://crrev.com/ee158e6c4cc896479a32245432a3c2fdd31bcb73
> Committed: https://crrev.com/ddf792beb3a72f6dba83e94fc8ada03ebf1630bd
> Cr-Original-Commit-Position: refs/heads/master@{#39692}
> Cr-Commit-Position: refs/heads/master@{#39748}

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5267
==========

to

==========
Revert of [turbofan] ChangeFloat64ToTagged shouldn't canonicalize. (patchset #6
id:100001 of https://codereview.chromium.org/2367593003/ )

Reason for revert:
Still blows up on the main waterfall even after Jakob's fix:

https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps...
https://build.chromium.org/p/client.v8/builders/V8%20Mac64/builds/11557/steps...
https://build.chromium.org/p/client.v8/builders/V8%20Win64/builds/12982/steps...

Original issue's description:
> [turbofan] ChangeFloat64ToTagged shouldn't canonicalize.
>
> This matches current Crankshaft/fullcodegen behavior more closely and
> thus reduces the chances that we run into unnecessary polymorphism due
> to the field representation tracking in our object model.
>
> R=jarin@chromium.org
> BUG=v8:5267
>
> Committed:
https://chromium.googlesource.com/v8/v8/+/6a939714e991ebf10d56ddbd2869325cca9...
> Committed: https://crrev.com/ee158e6c4cc896479a32245432a3c2fdd31bcb73
> Committed: https://crrev.com/ddf792beb3a72f6dba83e94fc8ada03ebf1630bd
> Cr-Original-Commit-Position: refs/heads/master@{#39692}
> Cr-Commit-Position: refs/heads/master@{#39748}

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5267

Committed: https://crrev.com/76b68915b3b87ac6da9408a4d5d756cfe0440d8b
Cr-Commit-Position: refs/heads/master@{#39749}
==========

[commit-bot: I haz the power, 2016-09-27 05:11:07]

Patchset 1 (id:??) landed as
https://crrev.com/76b68915b3b87ac6da9408a4d5d756cfe0440d8b
Cr-Commit-Position: refs/heads/master@{#39749}