hg: shenandoah/jdk8/hotspot: [backport] 8244663: Shenandoah: C2 assertion fails in Matcher::collect_null_checks

[rkennke at redhat.com]

Changeset: 39812ad590f4
Author:    roland
Date:      2020-05-15 21:54 +0200
URL:       https://hg.openjdk.java.net/shenandoah/jdk8/hotspot/rev/39812ad590f4

[backport] 8244663: Shenandoah: C2 assertion fails in Matcher::collect_null_checks
Reviewed-by: shade

! src/share/vm/gc_implementation/shenandoah/c2/shenandoahSupport.cpp
+ test/gc/shenandoah/compiler/TestShenandoahCmpPAfterCall.java