hg: jdk/sandbox: 8238190: [JVMCI] Fix single implementor speculation for diamond shapes.

[chris.hegarty at oracle.com]

Changeset: 9b3d5cc71cea
Author:    dnsimon
Date:      2020-02-04 09:33 +0100
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/9b3d5cc71cea

8238190: [JVMCI] Fix single implementor speculation for diamond shapes.
Reviewed-by: kvn
Contributed-by: david.leopoldseder at oracle.com

! src/hotspot/share/oops/instanceKlass.cpp
+ test/hotspot/jtreg/compiler/jvmci/jdk.vm.ci.runtime.test/src/jdk/vm/ci/runtime/test/TestSingleImplementor.java