[Bug tree-optimization/68379] [6 Regression] BB vectorization: definition in block 13 follows the use for SSA_NAME

[Joost.VandeVondele at mat dot ethz.ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68379

--- Comment #2 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> 
---
(In reply to Markus Trippelsdorf from comment #1)
> *** Bug 68575 has been marked as a duplicate of this bug. ***

The testcase in PR68575 doesn't require avx, so might be useful for the
testsuite.