git: openjdk/jdk: 8271862: C2 intrinsic for Reference.refersTo() is often not used

[Per Liden]

Changeset: 3f723ca4
Author:    Per Liden <pliden at openjdk.org>
Date:      2021-08-11 11:09:59 +0000
URL:       https://git.openjdk.java.net/jdk/commit/3f723ca4577b9cffeb6153ee386edd75f1dfb1c6

8271862: C2 intrinsic for Reference.refersTo() is often not used

Reviewed-by: kbarrett, mchung

! src/java.base/share/classes/java/lang/ref/PhantomReference.java
! src/java.base/share/classes/java/lang/ref/Reference.java