hg: jdk/sandbox: 8223581: C2 compilation failed with assert(!q->is_MergeMem())

[chris.hegarty at oracle.com]

Changeset: 4645b6d57f54
Author:    thartmann
Date:      2019-05-23 09:46 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/4645b6d57f54

8223581: C2 compilation failed with assert(!q->is_MergeMem())
Summary: Aggressively remove MergeMems feeding into other MergeMems during incremental inlining.
Reviewed-by: vlivanov

! src/hotspot/share/opto/graphKit.cpp