[Bug tree-optimization/90018] New: [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90018

            Bug ID: 90018
           Summary: [8 Regression] r265453 miscompiled 527.cam4_r in SPEC
                    CPU 2017
           Product: gcc
           Version: 8.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: rguenther at suse dot de
  Target Milestone: ---

On x86-64 with AVX512, r265453 miscompiled 527.cam4_r in SPEC CPU 2017 with:

-march=native -Ofast -funroll-loops

527.cam4_r segfaults immediately. GCC 7 branch and master branch are OK.