Fix a perfrormance degradation in Mandelbrot: double comparison may have

Fix a perfrormance degradation in Mandelbrot: double comparison may have
left and right temporary objects.
Committed: https://code.google.com/p/dart/source/detail?r=3660

[siva, 2012-01-27 01:35:17]

LGTM.

One question if most of the nodes can handle temp would make sense to invert the
default initialization to true and set it to false only in those nodes where it
cannot handle it.

[srdjan, 2012-01-27 16:15:46]

On 2012/01/27 01:35:17, asiva wrote:
> LGTM.
> 
> One question if most of the nodes can handle temp would make sense to invert
the
> default initialization to true and set it to false only in those nodes where
it
> cannot handle it.

Actually most nodes cannot handle temp (e.g., return node, store field , store
indexed, store static), but that is not a problem as they do not pass
CodeGenInfo .. yet. Therefore, I think that I should keep the default false.