[Bug c/49518] New: ICE in vect_enhance_data_refs_alignment, at tree-vect-data-refs.c:1555

["regehr at cs dot utah.edu" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49518

           Summary: ICE in vect_enhance_data_refs_alignment, at
                    tree-vect-data-refs.c:1555
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: regehr@cs.utah.edu
                CC: chenyang@cs.utah.edu
              Host: x86_64-unknown-linux-gnu
            Target: x86_64-unknown-linux-gnu
             Build: x86_64-unknown-linux-gnu


[regehr@gamow tmp032]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r175350-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r175350-install
--program-prefix=r175350- --enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 20110623 (experimental) (GCC) 
[regehr@gamow tmp032]$ 
[regehr@gamow tmp032]$ 
[regehr@gamow tmp032]$ 
[regehr@gamow tmp032]$ current-gcc -O3 small.c -c
small.c: In function 'un_':
small.c:13:5: internal compiler error: in vect_enhance_data_refs_alignment, at
tree-vect-data-refs.c:1555
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[regehr@gamow tmp032]$ 
[regehr@gamow tmp032]$ 
[regehr@gamow tmp032]$ 
[regehr@gamow tmp032]$ 
[regehr@gamow tmp032]$ cat small.c
struct S1
{
  int f4;
  int f5;
  int f9;
};

int *zz;
struct S1 g_40;
struct S1 g_69;
int g_79;

int un_ (struct S1 **p_, int p_6, char p_66)
{
  char l_76[] = { 0, 0, 0, 0, 1, };
  for (g_40.f4 = 1; g_40.f4; g_40.f4 += 1)
    {
      int *l_78 = &g_79;
      *l_78 = l_76[g_40.f4];
      if (zz)
    return 1;
      *l_78 = p_66 >= g_40.f9;
      if (g_69.f5)
    break;
    }
  return 0;
}