hg: jdk/jdk15: 8243670: Unexpected test result caused by C2 MergeMemNode::Ideal

[felix.yang at huawei.com]

Changeset: b54edbc03f86
Author:    fyang
Date:      2020-07-04 08:18 +0800
URL:       https://hg.openjdk.java.net/jdk/jdk15/rev/b54edbc03f86

8243670: Unexpected test result caused by C2 MergeMemNode::Ideal
Reviewed-by: thartmann, roland
Contributed-by: zhouyong44 at huawei.com

! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/memnode.cpp
+ test/hotspot/jtreg/compiler/c2/TestReplaceEquivPhis.java