hg: jdk/sandbox: 8217629: RegMask::find_lowest_bit can reuse count_trailing_zeros utility

[chris.hegarty at oracle.com]

Changeset: e422b21ca556
Author:    redestad
Date:      2019-01-23 17:25 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/e422b21ca556

8217629: RegMask::find_lowest_bit can reuse count_trailing_zeros utility
Reviewed-by: thartmann, neliasso

! src/hotspot/share/opto/regmask.cpp
! src/hotspot/share/opto/regmask.hpp