[Bug target/58442] bootstrapping vax crashes on NetBSD

["martin at netbsd dot org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58442

--- Comment #6 from Martin Husemann <martin at netbsd dot org> ---
To verify, I instrumented get_mem_attrs:

static inline struct mem_attrs *
get_mem_attrs (const_rtx x)
{    
  struct mem_attrs *attrs;

  attrs = MEM_ATTRS (x);

  attrs = MEM_ATTRS (x);
  if (!attrs) {
    attrs = mode_mem_attrs[(int) GET_MODE (x)];
    if ((unsigned long)attrs < 1024) {
      fprintf(stderr, "ooops, mode_mem_attrs are bogus: %p mode %d\n", attrs,
G$
      debug_rtx(x);
    }
  } else if ((unsigned long)attrs < 1024) {
    fprintf(stderr, "ooops, bogus rtx mem attrs: %p\n", attrs);
    debug_rtx(x);
  }

  return attrs;
}

and indeed this fires:

ooops, bogus rtx mem attrs: 0x4
(subreg:SI (reg/v:DI 71 [ __s ]) 4)
In file included from
/usr/pkgobj/lang/gcc48/work/build/vax--netbsdelf/libstdc++-v3/include/bits/locale_facets_nonio.h:1903:0,
                 from
/usr/pkgobj/lang/gcc48/work/build/vax--netbsdelf/libstdc++-v3/include/locale:41,
                 from
../../../../../gcc-4.8.1/libstdc++-v3/src/c++98/locale-inst.cc:29:
...