hg: jdk/jdk: 8220159: Optimize various RegMask operations by introducing watermarks

[claes.redestad at oracle.com]

Changeset: 6347ffe2c3c7
Author:    redestad
Date:      2019-03-05 16:39 +0100
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/6347ffe2c3c7

8220159: Optimize various RegMask operations by introducing watermarks
Reviewed-by: neliasso, thartmann

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