dart2js cps_ir: Use JSNumber_methods where possible

dart2js cps_ir: Use JSNumber_methods where possible

We can often use the JSNumber interceptor directly without choosing
between JSNumber and JSInt.

BUG=
R=asgerf@google.com

Committed: https://github.com/dart-lang/sdk/commit/52d7ad19781ad2a535027231aca2d954906cfc07

[sra1, 2015-10-14 01:16:02]

sra@google.com changed reviewers:
+ asgerf@google.com

[sra1, 2015-10-14 01:16:02]

Helps num.toInt(), num.round(), etc by eliminating getInterceptor calls for many
common num operations.

Brings MicroMath performance in line with SSA.

https://codereview.chromium.org/1395333004/diff/1/pkg/compiler/lib/src/cps_ir...
File pkg/compiler/lib/src/cps_ir/type_mask_system.dart (right):

https://codereview.chromium.org/1395333004/diff/1/pkg/compiler/lib/src/cps_ir...
pkg/compiler/lib/src/cps_ir/type_mask_system.dart:215: return
t.nonNullable().containsOnlyInt(classWorld);
This includes  [subtype=int].

[asgerf, 2015-10-14 08:44:02]

LGTM

https://codereview.chromium.org/1395333004/diff/1/pkg/compiler/lib/src/cps_ir...
File pkg/compiler/lib/src/cps_ir/type_mask_system.dart (right):

https://codereview.chromium.org/1395333004/diff/1/pkg/compiler/lib/src/cps_ir...
pkg/compiler/lib/src/cps_ir/type_mask_system.dart:215: return
t.nonNullable().containsOnlyInt(classWorld);
On 2015/10/14 01:16:02, sra1 wrote:
> This includes  [subtype=int].

Could you do the same for the other number types?

[sra1, 2015-10-14 19:57:40]

Committed patchset #1 (id:1) manually as
52d7ad19781ad2a535027231aca2d954906cfc07 (presubmit successful).