regent: Fix perf regression in PENNANT loop condition.
regent: Fix perf regression in PENNANT loop condition.

sdalton1/legion,noahdesu/legion,StanfordLegion/legion,StanfordLegion/legion,sdalton1/legion,StanfordLegion/legion,StanfordLegion/legion,noahdesu/legion,StanfordLegion/legion,chuckatkins/legion,noahdesu/legion,chuckatkins/legion,sdalton1/legion,chuckatkins/legion,noahdesu/legion,StanfordLegion/legion,StanfordLegion/legion,sdalton1/legion,sdalton1/legion,StanfordLegion/legion,chuckatkins/legion,chuckatkins/legion,sdalton1/legion,chuckatkins/legion,noahdesu/legion,chuckatkins/legion