[Bug fortran/82184] New: [8 Regression] 187.facerec in SPEC CPU 2000 miscompares

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82184

            Bug ID: 82184
           Summary: [8 Regression] 187.facerec in SPEC CPU 2000
                    miscompares
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: pault at gcc dot gnu.org
  Target Milestone: ---

On x86-64, r251949 caused

Compiling Binaries
  Building 187.facerec ref base lnx32e-gcc default
Setting Up Run Directories
  Setting up 187.facerec ref base lnx32e-gcc default: created
Running Benchmarks
  Running 187.facerec ref base lnx32e-gcc default
*** Miscompare of ref.out, see
/export/gnu/import/git/gcc-regression/spec/2000/spec/benchspec/CFP2000/187.facerec/run/00000002/ref.out.mis
*** Miscompare of hops.out, see
/export/gnu/import/git/gcc-regression/spec/2000/spec/benchspec/CFP2000/187.facerec/run/00000002/hops.out.mis

facerec was built with

gfortran     -O2 -ffast-math  -DSPEC_CPU2000_LP64 FaceRecTypes.o
parameterRoutines.o cfftb.o cfftf.o cffti.o fft2d.o gaborRoutines.o
imageRoutines.o graphRoutines.o FaceRec.o     -o facerec