[Bug tree-optimization/31169] Bootstrap comparison error at revision 122821

["sje at cup dot hp dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #3 from sje at cup dot hp dot com  2007-03-15 00:19 -------
My attempt to add an attachment failed (mail to dberlin has been sent) so here
is a cut down code segment from genautomata.c that generates different assembly
language when compiled with the PA stage1 compiler than it does with the PA
stage2 compiler.



enum regexp_mode
{
  rm_unit,
  rm_reserv,
  rm_nothing,
  rm_sequence,
  rm_repeat,
  rm_allof,
  rm_oneof
};

struct regexp;
typedef struct regexp *regexp_t;

struct oneof_regexp
{
  int regexps_num;
  regexp_t regexps [1];
};

struct regexp
{
  enum regexp_mode mode;
  int pos;
  union
  {
    struct oneof_regexp oneof;
  } regexp;
};

void
process_alts_for_forming_states (regexp_t regexp)
{
  int i = 1;
      for (i = regexp->regexp.oneof.regexps_num - 1; i >= 0; i--)
        process_alts_for_forming_states (__extension__ (({ struct regexp *const
_regexp = (regexp); if (_regexp->mode != rm_oneof) abort ();
&(_regexp)->regexp.
oneof; }))->regexps [i]);
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31169