hg: jdk/sandbox: 8189230: JDK method:java.lang.Integer.numberOfLeadingZeros(int) can be optimized

[chris.hegarty at oracle.com]

Changeset: 3c0a12972165
Author:    bpb
Date:      2018-03-15 08:11 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/3c0a12972165

8189230: JDK method:java.lang.Integer.numberOfLeadingZeros(int) can be optimized
Summary: Directly return zero for a negative parameter instead of calculating
Reviewed-by: psandoz

! src/java.base/share/classes/java/lang/Integer.java
! src/java.base/share/classes/java/lang/Long.java