hg: jdk/sandbox: 8231291: C2: loop opts before EA should maximally unroll loops

[chris.hegarty at oracle.com]

Changeset: 51fb05ec531d
Author:    roland
Date:      2019-12-20 17:17 +0100
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/51fb05ec531d

8231291: C2: loop opts before EA should maximally unroll loops
Reviewed-by: kvn, vlivanov

! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/compile.hpp
! src/hotspot/share/opto/loopnode.cpp