RFR: 8305781: compiler/c2/irTests/TestVectorizationMultiInvar.java failed with "IRViolationException: There were one or multiple IR rule failures."

Mon Apr 17 11:35:17 UTC 2023

The test case only works if unaligned accesses are allowed (that is
AlignVector false). I added a runtime check similar to what I did with
TestVectorizationMismatchedAccess.

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Commit messages:
 - test fix

Changes: https://git.openjdk.org/jdk/pull/13492/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13492&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305781
  Stats: 9 lines in 1 file changed: 7 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/13492.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13492/head:pull/13492

PR: https://git.openjdk.org/jdk/pull/13492