hg: jdk/sandbox: 2 new changesets

[chris.hegarty at oracle.com]

Changeset: 4fbcbd248c52
Author:    thartmann
Date:      2019-08-13 09:54 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/4fbcbd248c52

8228772: C2 compilation fails due to unschedulable graph if DominatorSearchLimit is reached
Summary: Ignore membar if the load is already control dependent on it.
Reviewed-by: neliasso, kvn

! src/hotspot/share/opto/gcm.cpp
+ test/hotspot/jtreg/compiler/controldependency/TestAntiDependentMembar.java

Changeset: 8e51da27b53a
Author:    thartmann
Date:      2019-08-13 09:56 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/8e51da27b53a

8224957: C2 compilation fails with assert: Bad graph detected in build_loop_late
Summary: Disable walking up the dominator chain for regions with more than 2 input paths.
Reviewed-by: roland, kvn

! src/hotspot/share/opto/c2_globals.hpp
! src/hotspot/share/opto/memnode.cpp
! src/hotspot/share/opto/node.cpp
+ test/hotspot/jtreg/compiler/eliminateAutobox/TestSplitThroughPhi.java