[Bug middle-end/49736] New: [4.7 Regression] Revision 176228 miscompiled 255.vortex in SPEC CPU 2000

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49736

           Summary: [4.7 Regression] Revision 176228 miscompiled
                    255.vortex in SPEC CPU 2000
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com
                CC: rsandifo@gcc.gnu.org


On Linux/x86-64, revision 176228:

http://gcc.gnu.org/ml/gcc-cvs/2011-07/msg00494.html

miscompiled 255.vortex in SPEC CPU 2000:

gcc     -O2 -ffast-math  -DSPEC_CPU2000_LP64 bitvec.o bmt.o bmt0.o bmt01.o
bmt10.o bmtlib.o bmtobj.o core01.o dba.o dbm0.o dbm1.o dbm2.o domain.o draw07.o
draw7.o drawlib.o drawobj.o emplib.o empobj.o env0.o env01.o env1.o fm.o gdbm.o
grp0.o grp1.o grp2.o hm.o iam.o ifm.o im.o km.o list01.o mem00.o mem01.o
mem10.o oa0.o oa1.o oadmp.o obj01.o odbm.o ogrp.o om.o point.o primal.o pstub.o
query.o rect.o rects.o sa.o shell.o sm.o testobj.o tm.o trans00.o trans01.o
trans10.o trans20.o tree0.o tree00.o tree01.o ut.o vchunk.o vdbm.o voa.o vom.o 
 -lm  -o vortex

  Running 255.vortex ref base lnx32e-gcc default
*** Miscompare of vortex3.out, see
/export/regression/rrs/spec/2000/spec/benchsp
ec/CINT2000/255.vortex/run/00000002/vortex3.out.mis
*** Miscompare of vortex1.out, see
/export/regression/rrs/spec/2000/spec/benchsp
ec/CINT2000/255.vortex/run/00000002/vortex1.out.mis
*** Miscompare of vortex2.out, see
/export/regression/rrs/spec/2000/spec/benchsp
ec/CINT2000/255.vortex/run/00000002/vortex2.out.mis