git: openjdk/jdk17u: master: 8273021: C2: Improve Add and Xor ideal optimizations

[Vladimir Kozlov]

Changeset: e829c856
Author:    Yi Yang <yyang at openjdk.org>
Committer: Vladimir Kozlov <kvn at openjdk.org>
Date:      2021-11-05 16:28:32 +0000
URL:       https://git.openjdk.java.net/jdk17u/commit/e829c856b738d03db3ab210d3bde24b83af633cb

8273021: C2: Improve Add and Xor ideal optimizations

Backport-of: a73c06de2ac47033503189140c0f8ee61fcbceae

! src/hotspot/share/opto/addnode.cpp
! src/hotspot/share/opto/addnode.hpp
+ test/hotspot/jtreg/compiler/c2/TestAddXorIdeal.java