Before https://github.com/openjdk/jdk/commit/827c71dac9a5732f70bc7341743bce314cad302f, on some specific AArch64 CPUs requiring "-XX:+AlignVector", we saw IR check failure on Hotspot jtreg `compiler/loopopts/superword/TestMulAddS2I.java`. After the commit merged, it should pass on all platforms. It's still worthwhile to improve the test coverage on all platforms by applying another common VM flag.