[Bug tree-optimization/43097] New: ICE in rename_map_elt_info for Graphite, vect in 173.applu

[janis at gcc dot gnu dot org]

GCC trunk gets an internal compiler error when building SPEC CPU2000 test
173.applu on powerpc64-linux with options "-O2 -fgraphite-identity
-ftree-vectorize" for either -m32 or -m64.  Here's a minimized testcase:

      subroutine foo (ldmx,ldmy,nx,ny,v)
      implicit real*8 (a-h, o-z)
      dimension v(5,ldmx,ldmy,*)
      dimension tmat(5,5)

      k = 2
      do j = 2, ny-1
         do i = 2, nx-1
            do ip = 1, 4
               do m = ip+1, 5
                  v(m,i,j,k) = v(m,i,j,k) * m
               end do
            end do
            do m = 5, 1, -1
               do l = m+1, 5
                  v(m,i,j,k) = v(l,i,j,k)
               end do
               v(m,i,j,k) = m
           end do
         end do
      end do
      return
      end

elm3b149% /home/janis/tools/gcc-trunk-anonsvn/bin/gfortran -c -O2
-fgraphite-identity -ftree-vectorize bug.f
bug.f: In function ‘foo’:
bug.f:1:0: internal compiler error: tree check: expected ssa_name, have
var_decl in rename_map_elt_info, at sese.c:81
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

The benchmark and testcase compile cleanly with GCC 4.4.2.  The failure
begins with this patch:

    http://gcc.gnu.org/viewcvs?view=rev&rev=156711

    r156711 | spop | 2010-02-11 19:42:38 +0000 (Thu, 11 Feb 2010)


-- 
           Summary: ICE in rename_map_elt_info for Graphite, vect in
                    173.applu
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43097