[8u40] Bulk backport request: 8058825, 8059556, 8058828

[Vladimir Ivanov]

This is a bulk request to backport the following changes into 8u40. They 
were integrated into 9 and cleanly apply to 8u-dev.

(1) 8058825: EA: ConnectionGraph::split_unique_types does incorrect 
scalar replacement
     https://bugs.openjdk.java.net/browse/JDK-8058825
     http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/19c71767e456

(2) 8059556: C2: crash while inlining MethodHandle invocation w/ null 
receiver
     https://bugs.openjdk.java.net/browse/JDK-8059556
     http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/9c4780bccc23

(3) 8058828: Wrong ciConstant type for arrays from 
ConstantPool::_resolved_reference
     https://bugs.openjdk.java.net/browse/JDK-8058828
     http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/677d7ff6a1cf

Best regards,
Vladimir Ivanov