[Bug rtl-optimization/63895] New: [5 Regression] r217588 miscompled 178.galgel from cpu2000

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63895

            Bug ID: 63895
           Summary: [5 Regression] r217588 miscompled 178.galgel from
                    cpu2000
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: vmakarov at redhat dot com

On Linux/x86-64, r217588 miscompiled 178.galgel from cpu2000:

# gfortran     -O3 -funroll-loops -ffast-math  -DSPEC_CPU2000_LP64 ....
...
0203:                 C1 = (  -0.3411    ,  0.2388    )
                      C1 = (   0.2181E+13, -0.3477E+12)
                                        ^
0206:                 Error in right eigenvector is   0.000    
                      Error in right eigenvector is   156.7    
                                                          ^
0249:                 D(Lambda)/D(Gr) = (   0.3254E-04,  0.6779E-04)
                      D(Lambda)/D(Gr) = (  -0.4526E-13, -0.6501E-13)
                                                     ^
0251:            Calculated estimations of errors:
        Error in BifGel: D(alpha)/D(Anu) = 0
       ^
0252:                 Error in calculation of Omega       =  0.000    
        BifGel: weakly nonlinear analysis failed
       ^
0253:                 Error in calculation of Amu2        =  0.000    
        Error return from BifGel called by Cyklap: ier=  139
             ^
'galgel.out' short