[Bug ipa/65028] New: [5 Regression] 450.soplex in SPEC CPU 2006 is miscompiled

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65028

            Bug ID: 65028
           Summary: [5 Regression] 450.soplex in SPEC CPU 2006 is
                    miscompiled
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: hubicka at ucw dot cz

On Linux/x86-64, r220521 miscompiled 450.soplex in SPEC CPU 2006:

g++  -O3 -funroll-loops -ffast-math -fwhole-program -flto=jobserver
-fuse-linker-plugin  -DSPEC_CPU_LP64        changesoplex.o didxset.o dsvector.o
dvector.o enter.o example.o factor.o forest.o idxset.o leave.o lpcolset.o
lprow.o lprowset.o message.o mpsinput.o nameset.o slufactor.o solve.o soplex.o
spxaggregatesm.o spxbasis.o spxbounds.o spxchangebasis.o spxdefaultpr.o
spxdefaultrt.o spxdefines.o spxdesc.o spxdevexpr.o spxequilisc.o spxfastrt.o
spxgeneralsm.o spxharrisrt.o spxhybridpr.o spxid.o spxio.o spxlp.o spxlpfread.o
spxmpsread.o spxmpswrite.o spxparmultpr.o spxquality.o spxredundantsm.o
spxrem1sm.o spxscaler.o spxshift.o spxsolve.o spxsolver.o spxstarter.o
spxsteeppr.o spxsumst.o spxvecs.o spxvectorst.o spxweightpr.o spxweightst.o
ssvector.o svector.o svset.o timer.o unitvector.o update.o updatevector.o
vector.o vsolve.o                     -o soplex
...
 Running 450.soplex ref peak lto default

450.soplex: copy 0 non-zero return code (exit code=11, signal=0)