[Bug tree-optimization/50838] [4.7 Regression] ice in refs_may_alias_p_1 with -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50838

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-24 
09:56:02 UTC ---
Reduced testcase, fails with -O -ftree-vectorize:

typedef void * gcv_object_t;
typedef gcv_object_t object;
typedef const void * Pseudofun;
extern struct pseudocode_tab_ {
    Pseudofun pseudo_eql;
    Pseudofun pseudo_iconv_wcslen;
    Pseudofun pseudo_iconv_wcstombs;
    Pseudofun pseudo_iconv_range;
}
pseudocode_tab;
extern struct symbol_tab_ {
    object pointer[1024];
} pseudofun_tab;
int
init_memory (void)
{
  object* ptr2 = &pseudofun_tab.pointer[0];
  const Pseudofun* ptr1 = (const Pseudofun*)&pseudocode_tab;
  unsigned int count = (sizeof(pseudocode_tab)/sizeof(Pseudofun));
  while (count--)
    {
      *ptr2++ = (gcv_object_t)(((unsigned char *)((*ptr1))));
      ptr1++;
    }
}