[Bug middle-end/67298] New: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67298

            Bug ID: 67298
           Summary: [6 Regression] 254.gap in SPEC CPU 2000 is miscompiled
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: naveenh at gcc dot gnu.org
  Target Milestone: ---

On Linux/x86-64, r226847 compiles 254.gap in SPEC CPU 2000
into an infinite loop with

-O2 -ffast-math  -DSPEC_CPU2000_LP64