Currently vectorization tests are spread in several directories:

compiler/c2/cr6340864/ compiler/codegen/ compiler/loopopts/superword/ compiler/vectorization

I think we should move them all into one directory and create new hotspot_compiler_vectorization test group for them.

We may want to run them with different SSE and AVX settings to make sure they will not crash VM as in JDK-8251994 case on user's new machine and passed in mach5 just because AVX was reset to lower level due to bug in HW we use.