8171392: Move Klass pointers outside of ConstantPool entries so ConstantPool can be read-only
Summary: Added _resolved_klasses; moved _resolved_references to ConstantPoolCache, etc.
Reviewed-by: coleenp, lfoltan, simonis, aph

8172020: Internal Error (cpu/arm/vm/frame_arm.cpp:571): assert(obj == __null || Universe::heap()->is_in(obj)) failed: sanity check #
Summary: do check_and_handle_earlyret() on method return
Reviewed-by: sspitsyn, aph, adinn, simonis

8167673: [s390] The s390 port.
Summary: template interpreter, C1, C2
Reviewed-by: kvn, simonis