hg: jdk/submit: 8248043: Need to eliminate excessive i2l conversions

[boris.ulasevich at bell-sw.com]

Changeset: 586fcf4b3f9d
Author:    bulasevich
Date:      2020-07-02 13:42 -0400
URL:       https://hg.openjdk.java.net/jdk/submit/rev/586fcf4b3f9d

8248043: Need to eliminate excessive i2l conversions
Reviewed-by: redestad, kvn, iveresov

! src/hotspot/share/opto/subnode.cpp
! src/hotspot/share/opto/subnode.hpp
+ test/hotspot/jtreg/compiler/c2/TestSkipLongToIntCast.java
+ test/micro/org/openjdk/bench/vm/compiler/SkipIntToLongCast.java