8346888: [ubsan] block.cpp:1617:30: runtime error: 9.97582e+36 is outside the range of representable values of type 'int'

Reviewed-by: kvn, dlong

Author: MBaesken

src/hotspot/share/opto/block.cpp

@@ -1613,7 +1613,8 @@ void PhaseBlockLayout::find_edges() {
           Block *target = b->non_connector_successor(j);
           float freq = b->_freq * b->succ_prob(j);
           int from_pct = (int) ((100 * freq) / b->_freq);
-          int to_pct = (int) ((100 * freq) / target->_freq);
+          float f_to_pct = (100 * freq) / target->_freq;
+          int to_pct = (f_to_pct < 100.0) ? (int)f_to_pct : 100;
           edges->append(new CFGEdge(b, target, freq, from_pct, to_pct));
         }
       }