Make register allocator to disregard constant computation with no uses.

Make register allocator to disregard constant computation with no uses.

Inline constant values into environments, instead of creating a use of the constant definition.

Change BinarySmiOpComp code template to allow inline constant uses for the right hand side.


R=fschneider@google.com
BUG=

Committed: https://code.google.com/p/dart/source/detail?r=11798

[Florian Schneider, 2012-09-04 09:43:59]

LGTM.

Make sure that the new instructions are also handled in the disassembler.