review(S) 7004547: regular loop unroll should not unroll more than max unrolling

[Tom Rodriguez]

Looks good.

tom

On Apr 4, 2011, at 3:01 PM, Vladimir Kozlov wrote:

> http://cr.openjdk.java.net/~kvn/7004547/webrev
> 
> Fixed 7004547: regular loop unroll should not unroll more than max unrolling
> 
> Max unroll policy when calculating new loop body size does not take into account that after unroll conjoined loop's head and tail will fold. As result there are cases when max unroll was not done but regular unroll will do full unrolling for main loop.
> Use long arithmetic to calculate exact trip count.
> Add missing nodes limit check for loop split (pre-main-post).
>