8303466: C2: failed: malformed control flow. Limit type made precise with MaxL/MinL

src/hotspot/share/opto/addnode.cpp

src/hotspot/share/opto/addnode.hpp

src/hotspot/share/opto/convertnode.cpp

src/hotspot/share/opto/convertnode.hpp

src/hotspot/share/opto/loopTransform.cpp

src/hotspot/share/opto/macro.cpp

...t/jtreg/compiler/loopopts/TestUnrollLimitPreciseType.java