hg: jdk/jdk: 8234003: Improve IndexSet iteration

[claes.redestad at oracle.com]

Changeset: 95a99e617f28
Author:    redestad
Date:      2019-11-14 15:24 +0100
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/95a99e617f28

8234003: Improve IndexSet iteration
Reviewed-by: neliasso, thartmann

! src/hotspot/share/opto/chaitin.cpp
! src/hotspot/share/opto/coalesce.cpp
! src/hotspot/share/opto/ifg.cpp
! src/hotspot/share/opto/indexSet.cpp
! src/hotspot/share/opto/indexSet.hpp
! src/hotspot/share/opto/live.cpp
! src/hotspot/share/opto/reg_split.cpp