hg: jdk/sandbox: 8229020: Failure on CPUs allowing loads reordering: assert(_tasks[t] == 1) failed: What else?

[chris.hegarty at oracle.com]

Changeset: 883f5702054d
Author:    jiefu
Date:      2019-08-03 09:04 +0800
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/883f5702054d

8229020: Failure on CPUs allowing loads reordering: assert(_tasks[t] == 1) failed: What else?
Reviewed-by: tschatzl, kbarrett

! src/hotspot/share/gc/shared/workgroup.cpp