[Bug target/11576] [3.3 regression] internal error at emit-rtl.c:2017

["kazu at cs dot umass dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11576



------- Additional Comments From kazu at cs dot umass dot edu  2003-09-02 10:01 -------
I simplified the testcase a little bit.

struct list_head {
  struct list_head *next, *prev;
};

struct atomic {
  int counter;
};

struct address_space {
  struct list_head clean_pages;
};

struct page {
  struct list_head list;
  struct address_space *mapping;
  unsigned long index;
  struct atomic count;
  unsigned long flags;
};

extern unsigned int page_hash_bits;

unsigned int page_hash_bits;

struct page **page_hash_table;

void add_page_to_hash_queue (struct page *page, struct page **p);

void lru_cache_add (struct page *page);

void
add_to_page_cache (struct page *page, struct address_space *mapping,
		   unsigned long offset)
{
  unsigned long m = ((unsigned long) mapping) / 4 + offset;
  unsigned long hash_value =
    (m + (m >> page_hash_bits)) & ((1 << page_hash_bits) - 1);
  struct page **hash = page_hash_table + hash_value;
  struct list_head *head;

  page->flags |= 1;

  {
    struct atomic *v = &page->count;
    int flags;

    asm volatile ("" : "=r" (flags) :             : "er0");
    v->counter++;
    asm volatile ("" :              : "r" (flags) : "er0");
  }

  page->index = offset;

  head = &mapping->clean_pages;

  {
    struct list_head *new = &page->list;
    struct list_head *prev = head;
    struct list_head *next = head->next;

    next->prev = new;
    new->next = next;
    new->prev = prev;
    prev->next = new;
  }

  add_page_to_hash_queue (page, hash);

  lru_cache_add (page);
}