hg: jdk/jdk: 8231988: Unexpected test result caused by C2 IdealLoopTree::do_remove_empty_loop

[felix.yang at huawei.com]

Changeset: 45a085445a8c
Author:    fyang
Date:      2019-10-11 16:52 +0800
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/45a085445a8c

8231988: Unexpected test result caused by C2 IdealLoopTree::do_remove_empty_loop
Summary: Duplicate cmp node in empty loop if it has other users
Reviewed-by: neliasso, thartmann
Contributed-by: wanghuang3 at huawei.com, xietuo at huawei.com

! src/hotspot/share/opto/loopTransform.cpp
+ test/hotspot/jtreg/compiler/loopopts/TestRemoveEmptyLoop.java