DBC: Add Smi fastpath to AssertAssignable

DBC: Add Smi fastpath to AssertAssignable

Flutter layout benchmark 14k us -> 10k us. ~30%
improvement in checked mode. There still appear
to be a lot of checks that should be hitting the
cache, so there may be other fast-paths needed
as well.

R=fschneider@google.com

Committed: https://github.com/dart-lang/sdk/commit/775fce18d5e6acfe461c214fba2369806722dbe1

[zra, 2016-10-11 20:47:06]

Description was changed from

==========
DBC: Add Smi fastpath to AssertAssignable
==========

to

==========
DBC: Add Smi fastpath to AssertAssignable

Flutter layout benchmark 14k us -> 10k us. ~30%
improvement in checked mode. There still appear
to be a lot of checks that should be hitting the
cache, so there may be other fast-paths needed
as well.
==========

[zra, 2016-10-11 20:47:19]

zra@google.com changed reviewers:
+ fschneider@google.com

[Florian Schneider, 2016-10-11 21:11:41]

lgtm

[zra, 2016-10-11 21:25:17]

Description was changed from

==========
DBC: Add Smi fastpath to AssertAssignable

Flutter layout benchmark 14k us -> 10k us. ~30%
improvement in checked mode. There still appear
to be a lot of checks that should be hitting the
cache, so there may be other fast-paths needed
as well.
==========

to

==========
DBC: Add Smi fastpath to AssertAssignable

Flutter layout benchmark 14k us -> 10k us. ~30%
improvement in checked mode. There still appear
to be a lot of checks that should be hitting the
cache, so there may be other fast-paths needed
as well.

R=fschneider@google.com

Committed:
https://github.com/dart-lang/sdk/commit/775fce18d5e6acfe461c214fba2369806722dbe1
==========

[zra, 2016-10-11 21:25:18]

Committed patchset #2 (id:20001) manually as
775fce18d5e6acfe461c214fba2369806722dbe1 (presubmit successful).