[Bug lto/60427] New: [4.9 Regression] r208312 causes ICE and wrong code for Fortran with -flto

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60427

            Bug ID: 60427
           Summary: [4.9 Regression] r208312 causes ICE and wrong code for
                    Fortran with -flto
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
                CC: pmatos at gcc dot gnu.org, rguenth at gcc dot gnu.org

After r208312 (+ the fix in r208315) I get

FAIL: gfortran.dg/pr33794.f90  -g -flto  execution test

with both -m32/-m64, and

FAIL: gfortran.dg/nint_2.f90  -g -flto  (internal compiler error)

with -m64 (r208311 + the fix in r208315 is OK).

The ICE occurs for the following reduced test

  real(kind=8) :: a
  integer(kind=8) :: i1

!  a = nearest(0.5_8,-1.0_8)
!  i1 = nint(a)

  a = 0.5_8
  i1 = nint(a)

!  a = nearest(0.5_8,1.0_8)
!  i1 = nint(a)

  end

[Book15] f90/bug% /opt/gcc/gcc4.9p-208312/bin/gfortran -flto nint_2_red.f90
nint_2_red.f90: In function 'MAIN__':
nint_2_red.f90:8:0: internal compiler error: Segmentation fault: 11
   i1 = nint(a)

The wong code is produced with '-O1 -ffast-math -flto' for
gfortran.dg/pr33794.f90 as well as the polyhedron test fatigue.f90.