[Bug tree-optimization/65494] New: [5.0 Regression] Loop is not vectorized because of operand canonicalization.

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65494

            Bug ID: 65494
           Summary: [5.0 Regression] Loop is not vectorized because of
                    operand canonicalization.
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ysrumyan at gmail dot com

5.0 compiler is not vectorized simple loop extracted from geekbench but 4.9
compiler does. This is caused by different operand ordering after loop
unrolling (I pointed out essential part of tree):
4.9              5.0
_105=_86+_1      _105=_86+_1
_109=_90+_63     _109=_63+_90
_21=_6+_82       _21=_6+_82

Test-case is attached.