[Bug tree-optimization/23079] New: ICE in tree_low_cst, at tree.c:4268 with -ftree-vectorize

["micis at gmx dot de" <gcc-bugzilla at gcc dot gnu dot org>]

When I compile the small program with the actual snapshot of
gcc41 (20050723) I get an ICE.

Michael Cieslinski


unsigned int foo ()
{
    unsigned int  y[256];
    unsigned int* x;
    for (x = y + 1; x < y + 256; ++x) *x += x[-1];
    return y[0];
}


gcc41h -O -ftree-vectorize -c sort.i -o sort.o
sort.i: In function 'foo':
sort.i:3: internal compiler error: in tree_low_cst, at tree.c:4268
Please submit a full bug report, with preprocessed source if appropriate.


gcc41h -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.1-20050723/configure --prefix=/usr/local/gcc41h --
program-suffix=41h --with-arch=opteron --enable-languages=c,c++ --enable-
checking
Thread model: posix
gcc version 4.1.0 20050723 (experimental)

-- 
           Summary: ICE in tree_low_cst, at tree.c:4268 with -ftree-
                    vectorize
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: micis at gmx dot de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23079