ICE in dwarf2out_finish due to -freorder-blocks

ICE in dwarf2out_finish due to -freorder-blocks

[Andreas Schwab]

Here is a test case where the current snapshot crashes when compiling with
-O -freorder-blocks -g on ia64-linux:

typedef long unsigned int size_t;
typedef int int32_t __attribute__ ((__mode__ (__SI__)));
struct obstack
{
  char *next_free;
  char *chunk_limit;
};
typedef unsigned int uint32_t;
struct charmap_t
{
};
enum
{
  __LC_COLLATE = 3,
};
enum
{
  _NL_NUM_LC_COLLATE,
};
struct iovec
  {
    void *iov_base;
    size_t iov_len;
  };
struct localedef_t
{
  union
  {
    struct locale_collate_t *collate;
  } categories[13];
};
static inline void
obstack_int32_grow (struct obstack *obstack, int32_t data)
{
  if (sizeof (int32_t) == sizeof (int))
    __extension__ ({ struct obstack *__o = (obstack); if (__o->next_free + sizeof (int) > __o->chunk_limit) _obstack_newchunk (__o, sizeof (int)); *((int *)__o->next_free)++ = (data); (void) 0; });
  else
    __extension__ ({ struct obstack *__o = (obstack); int __len = (sizeof (int32_t)); if (__o->next_free + __len > __o->chunk_limit) _obstack_newchunk (__o, __len); memcpy ((__o->next_free), ((&data)), (__len)); __o->next_free += __len; (void) 0; });
}
struct element_t
{
  size_t nwcs;
  struct element_t *wcnext;
};
struct wchead_table
{
};
void wchead_table_iterate (struct wchead_table *t,
                        void (*fn) (uint32_t wc, struct element_t * value));
struct collidx_table
{
  unsigned int p;
  unsigned int q;
  size_t result_size;
  char *result;
};
void collidx_table_init (struct collidx_table *t);
void collidx_table_add (struct collidx_table *t, uint32_t wc, int32_t value);
struct locale_collate_t
{
  struct wchead_table wcheads;
};
int32_t
output_weightwc (struct obstack *pool, struct locale_collate_t *collate,
                 struct element_t *elem);

void
collate_output (struct localedef_t *locale, struct charmap_t *charmap,
                const char *output_path)
{
  struct locale_collate_t *collate = locale->categories[__LC_COLLATE].collate;
  const size_t nelems = ((int) (_NL_NUM_LC_COLLATE) & 0xffff);
  struct iovec iov[2 + nelems];
  uint32_t idx[nelems];
  size_t cnt = 0;
  struct obstack weightpool;
  struct obstack extrapool;
  struct collidx_table tablewc;
  obstack_int32_grow (&extrapool, 0);
  {
    auto void add_to_tablewc (uint32_t ch, struct element_t *runp);
    void add_to_tablewc (uint32_t ch, struct element_t *runp)
      {
        if (runp->wcnext == ((void *)0) && runp->nwcs == 1)
          {
            int32_t weigthidx = output_weightwc (&weightpool, collate, runp);
            collidx_table_add (&tablewc, ch, weigthidx);
          }
      }
    tablewc.p = 6;
    tablewc.q = 10;
    collidx_table_init (&tablewc);
    wchead_table_iterate (&collate->wcheads, add_to_tablewc);
  }
  iov[2 + cnt].iov_base = tablewc.result;
  iov[2 + cnt].iov_len = tablewc.result_size;
  idx[1 + cnt] = idx[cnt] + iov[2 + cnt].iov_len;
}

Andreas.

-- 
Andreas Schwab                                  "And now for something
Andreas.Schwab@suse.de				completely different."
SuSE Labs, SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
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