[wasm] I added I64Eq to the Int64Lowering.

[wasm] I added I64Eq to the Int64Lowering.

(a EQ b) is lowered to ((low(a) XOR low(b)) OR (high(a) XOR high(b))) EQ 0

R=titzer@chromium.org

Committed: https://crrev.com/18d9da0dcfb2a93259c3dacfce2c409956027cf1
Cr-Commit-Position: refs/heads/master@{#34249}

[titzer, 2016-02-23 15:49:30]

lgtm

https://codereview.chromium.org/1729493002/diff/1/src/compiler/int64-lowering.cc
File src/compiler/int64-lowering.cc (right):

https://codereview.chromium.org/1729493002/diff/1/src/compiler/int64-lowering...
src/compiler/int64-lowering.cc:301: Node* replacement = graph()->NewNode(
Can you add a 

TODO(wasm): Use explicit comparisons and && here?

Since we might want to explore that as a better codegen option. The TODO(wasm)
indicates that it's a performance enhancement and not a functionality problem.

[ahaas, 2016-02-24 11:56:53]

The CQ bit was checked by ahaas@chromium.org

[ahaas, 2016-02-24 11:56:53]

The patchset sent to the CQ was uploaded after l-g-t-m from titzer@chromium.org
Link to the patchset: https://codereview.chromium.org/1729493002/#ps40001
(title: "rebase")

[commit-bot: I haz the power, 2016-02-24 11:57:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1729493002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1729493002/40001

[commit-bot: I haz the power, 2016-02-24 12:09:24]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-02-24 12:09:41]

Description was changed from

==========
[wasm] I added I64Eq to the Int64Lowering.

(a EQ b) is lowered to ((low(a) XOR low(b)) OR (high(a) XOR high(b))) EQ 0

R=titzer@chromium.org
==========

to

==========
[wasm] I added I64Eq to the Int64Lowering.

(a EQ b) is lowered to ((low(a) XOR low(b)) OR (high(a) XOR high(b))) EQ 0

R=titzer@chromium.org

Committed: https://crrev.com/18d9da0dcfb2a93259c3dacfce2c409956027cf1
Cr-Commit-Position: refs/heads/master@{#34249}
==========

[commit-bot: I haz the power, 2016-02-24 12:09:42]

Patchset 3 (id:??) landed as
https://crrev.com/18d9da0dcfb2a93259c3dacfce2c409956027cf1
Cr-Commit-Position: refs/heads/master@{#34249}