hg: jdk9/hs-comp/hotspot: 6869327: Add new C2 flag to keep safepoints in counted loops.

[andreas.eriksson at oracle.com]

Changeset: d84a55e7aaf8
Author:    aeriksso
Date:      2015-12-04 14:06 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/d84a55e7aaf8

6869327: Add new C2 flag to keep safepoints in counted loops.
Reviewed-by: kvn, shade

! src/share/vm/opto/c2_globals.hpp
! src/share/vm/opto/loopnode.cpp
! src/share/vm/opto/loopnode.hpp
+ test/compiler/loopopts/UseCountedLoopSafepoints.java