hg: jdk/sandbox: 8203279: Faster rounding up to nearest power of two

[chris.hegarty at oracle.com]

Changeset: a2c92332c6ba
Author:    igerasim
Date:      2018-05-21 12:49 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/a2c92332c6ba

8203279: Faster rounding up to nearest power of two
Reviewed-by: martin, redestad

! src/java.base/share/classes/java/util/ComparableTimSort.java
! src/java.base/share/classes/java/util/HashMap.java
! src/java.base/share/classes/java/util/TimSort.java