hg: jdk/jdk11: 8205999: C2 compilation fails with "assert(store->find_edge(load) != -1) failed: missing precedence edge"

[nils.eliasson at oracle.com]

Changeset: 0a8198fa7e7a
Author:    neliasso
Date:      2018-07-03 09:11 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk11/rev/0a8198fa7e7a

8205999: C2 compilation fails with "assert(store->find_edge(load) != -1) failed: missing precedence edge"
Summary: Backout 8204157 to state before 8192992
Reviewed-by: thartmann, mdoerr

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