[Bug tree-optimization/79321] New: -ftree-parallelize-loops miscompiles 400.perlbench

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79321

            Bug ID: 79321
           Summary: -ftree-parallelize-loops miscompiles 400.perlbench
           Product: gcc
           Version: 7.0.1
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-*-*

$summary, when I use -Ofast -ftree-parallelize-loops=4 -march=haswell on a
4-core machine - it seems to deadlock with TEST input (REF/TRAIN not checked).

trunk r245080.