Optimize ToNumber and NonNumberToNumber.

Optimize ToNumber and NonNumberToNumber.

Moves some uncommon type checking from ToNumber and
NonNumberToNumber into DefaultNumber. This should
speed up numeric operations especially as more "value types
are added.

LOG=N
BUG=513196, v8:4124
Committed: https://crrev.com/e31da45e0fb2fc56c4f4351732ebfb32e0daf02a
Cr-Commit-Position: refs/heads/master@{#29908}

[bbudge, 2015-07-28 14:59:12]

bbudge@chromium.org changed reviewers:
+ rossberg@chromium.org

[bbudge, 2015-07-28 14:59:12]

This seems to give about 3% back.

[rossberg, 2015-07-28 15:03:19]

lgtm

https://codereview.chromium.org/1260273002/diff/20001/src/runtime.js
File src/runtime.js (left):

https://codereview.chromium.org/1260273002/diff/20001/src/runtime.js#oldcode796
src/runtime.js:796: if (IS_FLOAT32X4(x)) throw MakeTypeError(kSimdToNumber);
Perhaps add a comment explaining the absence of these cases.

[bbudge, 2015-07-28 15:09:51]

https://codereview.chromium.org/1260273002/diff/20001/src/runtime.js
File src/runtime.js (left):

https://codereview.chromium.org/1260273002/diff/20001/src/runtime.js#oldcode796
src/runtime.js:796: if (IS_FLOAT32X4(x)) throw MakeTypeError(kSimdToNumber);
On 2015/07/28 15:03:19, rossberg wrote:
> Perhaps add a comment explaining the absence of these cases.

Done.

[bbudge, 2015-07-28 15:13:58]

The CQ bit was checked by bbudge@chromium.org

[bbudge, 2015-07-28 15:13:58]

The patchset sent to the CQ was uploaded after l-g-t-m from
rossberg@chromium.org
Link to the patchset: https://codereview.chromium.org/1260273002/#ps40001
(title: "Add comments.")

[commit-bot: I haz the power, 2015-07-28 15:14:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1260273002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1260273002/40001

[commit-bot: I haz the power, 2015-07-30 08:16:14]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-07-30 08:16:26]

Patchset 3 (id:??) landed as
https://crrev.com/e31da45e0fb2fc56c4f4351732ebfb32e0daf02a
Cr-Commit-Position: refs/heads/master@{#29908}