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Description of problem: There is a vectorization codegen problem in gcc8/9 on aarch64. This is a RHEL8 clone of the defect at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98949


Version-Release number of selected component (if applicable): RHEL 8.x/gcc 8


How reproducible: 100% given the testcase at the above url


Steps to Reproduce:
1. build & run testcase for assertion

Not sure if I should open a DTS9 specific bug too...

Unfortunately the patch (Comment 3) broke everything on aarch64, so I've reverted it.  But it should be brought as part of a wider rebase, tracked in bug 1946758.  Resetting DTM/ITM.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Low: gcc security and bug fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2021:4386

The needinfo request[s] on this closed bug have been removed as they have been unresolved for 120 days