hg: jdk-updates/jdk13u-dev: 8231988: Unexpected test result caused by C2 IdealLoopTree::do_remove_empty_loop

[vkempik at azul.com]

Changeset: c71b490c010d
Author:    fyang
Date:      2019-10-11 16:52 +0800
URL:       https://hg.openjdk.java.net/jdk-updates/jdk13u-dev/rev/c71b490c010d

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