IdealLoopTree::dump_head() used by -XX:TraceLoopOpts prints a negative trip count if CountedLoopNode::profile_trip_cnt() is large:

compute_profile_trip_cnt lp: 1676 cnt: 2147483648.000000
Loop: N1676/N1546 limit_check predicated counted [0,100),+8 (-2147483648 iters)

We should not cast float to int:

diff -r 979c4f71a3c8 src/share/vm/opto/loopnode.cpp
--- a/src/share/vm/opto/loopnode.cpp Mon Aug 31 17:20:08 2015 +0200
+++ b/src/share/vm/opto/loopnode.cpp Wed Sep 09 13:07:17 2015 +0200
@@ -1901,7 +1901,7 @@
     if (stride_con > 0) tty->print("+");
     tty->print("%d", stride_con);
 
- tty->print(" (%d iters) ", (int)cl->profile_trip_cnt());
+ tty->print(" (%0.f iters) ", cl->profile_trip_cnt());
 
     if (cl->is_pre_loop ()) tty->print(" pre" );
     if (cl->is_main_loop()) tty->print(" main");