[Bug tree-optimization/18544] New: [4.0 regression] ICE with -ftree-vectorize

["reichelt at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

The following code snippet causes an ICE on mainline when compiled with
"-ftree-vectorize -O -march=pentium2":

=========================================
struct A
{
    int x[2];

    A()
    {
        int* p=x;
        for (int i=0; i<2; ++i, ++p)
            *p = 0;
    }
};

A foo()
{
    return A();
}
=========================================

bug.cc: In function 'A foo()':
bug.cc:13: internal compiler error: in vect_create_data_ref_ptr, at
tree-vectorizer.c:1841
Please submit a full bug report, [etc.]

According to Phil's regression hunter this was introduced in October:
: Search converges between 2004-10-12-014001-trunk (#591) and
2004-10-15-014001-trunk (#592).

-- 
           Summary: [4.0 regression] ICE with -ftree-vectorize
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, monitored
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18544