hg: jdk/jdk: 8222786: Shenandoah get_barrier_strength should accept all shapes of (Weak)CAS reference barriers

[shade at redhat.com]

Changeset: 0ab35668b4f4
Author:    shade
Date:      2019-04-22 11:16 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/0ab35668b4f4

8222786: Shenandoah get_barrier_strength should accept all shapes of (Weak)CAS reference barriers
Reviewed-by: rkennke

! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp