8207355: C1 compilation hangs in ComputeLinearScanOrder::compute_dominator
Summary: Bail out from recursive computation if the block was already processed.
Reviewed-by: kvn, iveresov
^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
\.DS_Store
\.metadata/
\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
.*/JTreport/.*
.*/JTwork/.*
.*/.git/.*