[deoptimizer] Preserve double bit patterns correctly.

[deoptimizer] Preserve double bit patterns correctly.

This makes sure that the deoptimizer preserves the exact bit pattern of
floating-point values (both 32-bit and 64-bit) up to the point where a
potential {HeapNumber} is allocated. It in turn allows us to correctly
recognize the {hole_nan_value} when stored into a {FixedDouleArray}.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-684208
BUG=chromium:684208
Review-Url: https://codereview.chromium.org/2652303002
Cr-Commit-Position: refs/heads/master@{#42679}
Committed: https://chromium.googlesource.com/v8/v8/+/7376e12e00b89d7ba476addeb05058147f8dd91d

[Michael Starzinger, 2017-01-25 16:35:55]

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

[Michael Starzinger, 2017-01-25 18:21:56]

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

[commit-bot: I haz the power, 2017-01-25 18:22:08]

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

[Michael Starzinger, 2017-01-25 18:22:48]

Description was changed from

==========
[deoptimizer] Preserve double bit patterns correctly.

This makes sure that the deoptimizer preserves the exact bit pattern of
floating-point values (both 32-bit and 64-bit) up to the point where a
potential {HeapNumber} is allocated. It in turn allows us to corretly
recognize the {hole_nan_value} when stored into a {FixedDouleArray}.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-684208
BUG=chromium:684208
==========

to

==========
[deoptimizer] Preserve double bit patterns correctly.

This makes sure that the deoptimizer preserves the exact bit pattern of
floating-point values (both 32-bit and 64-bit) up to the point where a
potential {HeapNumber} is allocated. It in turn allows us to correctly
recognize the {hole_nan_value} when stored into a {FixedDouleArray}.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-684208
BUG=chromium:684208
==========

[commit-bot: I haz the power, 2017-01-25 18:56:05]

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

[commit-bot: I haz the power, 2017-01-25 18:56:06]

Dry run: This issue passed the CQ dry run.

[Jarin, 2017-01-26 07:41:18]

lgtm, thanks!

[Michael Starzinger, 2017-01-26 09:09:16]

mstarzinger@chromium.org changed reviewers:
+ ishell@chromium.org

[Michael Starzinger, 2017-01-26 09:09:17]

Jaro: Thanks, landing.
Igor: FYI.

[Michael Starzinger, 2017-01-26 09:12:45]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2017-01-26 09:12:52]

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, 2017-01-26 09:26:00]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485421965386880, "parent_rev":
"f6d0dc6d889f70890a8ee6f00091d14f0ef6199a", "commit_rev":
"7376e12e00b89d7ba476addeb05058147f8dd91d"}

[commit-bot: I haz the power, 2017-01-26 09:26:07]

Description was changed from

==========
[deoptimizer] Preserve double bit patterns correctly.

This makes sure that the deoptimizer preserves the exact bit pattern of
floating-point values (both 32-bit and 64-bit) up to the point where a
potential {HeapNumber} is allocated. It in turn allows us to correctly
recognize the {hole_nan_value} when stored into a {FixedDouleArray}.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-684208
BUG=chromium:684208
==========

to

==========
[deoptimizer] Preserve double bit patterns correctly.

This makes sure that the deoptimizer preserves the exact bit pattern of
floating-point values (both 32-bit and 64-bit) up to the point where a
potential {HeapNumber} is allocated. It in turn allows us to correctly
recognize the {hole_nan_value} when stored into a {FixedDouleArray}.

R=jarin@chromium.org
TEST=mjsunit/regress/regress-crbug-684208
BUG=chromium:684208

Review-Url: https://codereview.chromium.org/2652303002
Cr-Commit-Position: refs/heads/master@{#42679}
Committed:
https://chromium.googlesource.com/v8/v8/+/7376e12e00b89d7ba476addeb05058147f8...
==========

[commit-bot: I haz the power, 2017-01-26 09:26:08]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/7376e12e00b89d7ba476addeb05058147f8...