Allow negative literals in asm->wasm non-conversion operations.

Allow negative literals in asm->wasm non-conversion operations.

This allows expressions like:
(x + y) & -1
[intish] & [signed]

The previous conversion condition was too strict (intended to
forbid non-int expression conversion). Expressing in
a different way.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N

Committed: https://crrev.com/c8c5b3fddf2c8ee5df5854359b71a345f5ece3ba
Cr-Commit-Position: refs/heads/master@{#34228}

[bradnelson, 2016-02-22 02:54:02]

Description was changed from

==========
Allow negative literals in asm->wasm non-conversion operations.

This allows expressions like:
(x + y) & -1
[intish] & [signed]

The previous conversion condition was too strict (intended to
forbid non-int expression conversion). Expressing in
a different way.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N

fixing...
==========

to

==========
Allow negative literals in asm->wasm non-conversion operations.

This allows expressions like:
(x + y) & -1
[intish] & [signed]

The previous conversion condition was too strict (intended to
forbid non-int expression conversion). Expressing in
a different way.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N
==========

[aseemgarg, 2016-02-22 21:58:39]

There is also an issue of negative doubles not getting through. Maybe fix that
as part of this too (see the commented test TestModDoubleNegative in
asm-wasm.js)?

[bradnelson, 2016-02-23 07:49:37]

So I think parsing of negative doubles got fixed at some point, however, the
issue with mod is still there. I'd like to leave that to a separate change. I've
added a test of negative doubles, and dropped one TODO.

PTAL

[aseemgarg, 2016-02-23 19:19:42]

lgtm

[bradn, 2016-02-23 19:37:30]

The CQ bit was checked by bradnelson@google.com

[commit-bot: I haz the power, 2016-02-23 19:37:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1717213002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1717213002/20001

[commit-bot: I haz the power, 2016-02-23 19:39:52]

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

[commit-bot: I haz the power, 2016-02-23 19:39:53]

Try jobs failed on following builders:
  v8_presubmit on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_presubmit/builds/11394)

[bradn, 2016-02-23 20:41:59]

The CQ bit was checked by bradnelson@google.com

[bradn, 2016-02-23 20:41:59]

The patchset sent to the CQ was uploaded after l-g-t-m from
aseemgarg@chromium.org
Link to the patchset: https://codereview.chromium.org/1717213002/#ps40001
(title: "merge")

[commit-bot: I haz the power, 2016-02-23 20:42:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1717213002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1717213002/40001

[commit-bot: I haz the power, 2016-02-23 21:09:50]

Description was changed from

==========
Allow negative literals in asm->wasm non-conversion operations.

This allows expressions like:
(x + y) & -1
[intish] & [signed]

The previous conversion condition was too strict (intended to
forbid non-int expression conversion). Expressing in
a different way.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N
==========

to

==========
Allow negative literals in asm->wasm non-conversion operations.

This allows expressions like:
(x + y) & -1
[intish] & [signed]

The previous conversion condition was too strict (intended to
forbid non-int expression conversion). Expressing in
a different way.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N
==========

[commit-bot: I haz the power, 2016-02-23 21:09:51]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-02-23 21:10:25]

Description was changed from

==========
Allow negative literals in asm->wasm non-conversion operations.

This allows expressions like:
(x + y) & -1
[intish] & [signed]

The previous conversion condition was too strict (intended to
forbid non-int expression conversion). Expressing in
a different way.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N
==========

to

==========
Allow negative literals in asm->wasm non-conversion operations.

This allows expressions like:
(x + y) & -1
[intish] & [signed]

The previous conversion condition was too strict (intended to
forbid non-int expression conversion). Expressing in
a different way.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N

Committed: https://crrev.com/c8c5b3fddf2c8ee5df5854359b71a345f5ece3ba
Cr-Commit-Position: refs/heads/master@{#34228}
==========

[commit-bot: I haz the power, 2016-02-23 21:10:27]

Patchset 3 (id:??) landed as
https://crrev.com/c8c5b3fddf2c8ee5df5854359b71a345f5ece3ba
Cr-Commit-Position: refs/heads/master@{#34228}