hg: jdk/sandbox: 8246153: TestEliminateArrayCopy fails with -XX:+StressReflectiveCode

[chris.hegarty at oracle.com]

Changeset: 0b2fc7e19361
Author:    thartmann
Date:      2020-06-02 09:07 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/0b2fc7e19361

8246153: TestEliminateArrayCopy fails with -XX:+StressReflectiveCode
Summary: Use the memory input instead of the control input to find the membar.
Reviewed-by: kvn, neliasso

! src/hotspot/share/opto/macro.cpp
! test/hotspot/jtreg/compiler/arraycopy/TestEliminateArrayCopy.java