Request for reviews (M): 7004555: Add new policy for one iteration loops
vladimir.kozlov at oracle.com
Wed Apr 6 12:24:07 PDT 2011
Fixed 7004555: Add new policy for one iteration loops
Add new policy for one iteration loops (mostly formal pre- loops) to fold exit
condition and avoid going through do_maximally_unroll() as we do currently for
Move exact trip count calculation from policy_maximally_unroll() into separate
method. Note, trip_count type is changed to unsigned int and its range is
changed to [0, max_juint). Add new flag HasExactTripCount to indicate that
loop's limits and trip count are constants.
Check for non overlaping init and limit values to avoid zero trip guard
generation in remove_empty_loop.
Rename some CountedLoopNode flags.
Print loop iv range for counted loops dumps:
Loop: N286/N193 predicated counted [0,2),+1
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