gcc/testsuite/gcc.c-torture/compile/20100915-1.c

   1 /* PR rtl-optimization/45593 */
   2 /* Testcase by Arnaud Lacombe <lacombar@gmail.com> */
   3
   4 typedef unsigned int __u32;
   5 typedef __u32 __be32;
   6 static inline __attribute__((always_inline)) int __attribute__((__cold__)) printk(const char *s, ...) { return 0; }
   7 typedef struct journal_s journal_t;
   8 typedef struct journal_header_s
   9 {
  10  __be32 h_magic;
  11  __be32 h_blocktype;
  12  __be32 h_sequence;
  13 } journal_header_t;
  14 typedef struct journal_superblock_s
  15 {
  16  journal_header_t s_header;
  17  __be32 s_blocksize;
  18  __be32 s_maxlen;
  19 } journal_superblock_t;
  20 struct journal_s
  21 {
  22  struct buffer_head *j_sb_buffer;
  23  journal_superblock_t *j_superblock;
  24  int j_format_version;
  25  int j_blocksize;
  26  unsigned int j_maxlen;
  27 };
  28 static void journal_fail_superblock (journal_t *journal)
  29 {
  30  journal->j_sb_buffer = ((void *)0);
  31 }
  32 static int journal_get_superblock(journal_t *journal)
  33 {
  34  struct buffer_head *bh;
  35  journal_superblock_t *sb;
  36  int err = -100;
  37  bh = journal->j_sb_buffer;
  38  if (!buffer_uptodate(bh)) {
  39   if (!buffer_uptodate(bh)) {
  40    printk ("JBD: IO error reading journal superblock\n");
  41    goto out;
  42   }
  43  }
  44  err = -101;
  45  if (sb->s_header.h_magic != (( __be32)(__u32)(0)) ||
  46      sb->s_blocksize != (( __be32)(__u32)(journal->j_blocksize))) {
  47   printk("JBD: no valid journal superblock found\n");
  48   goto out;
  49  }
  50  switch((( __u32)(__be32)(sb->s_header.h_blocktype))) {
  51  case 0:
  52  case 1:
  53   break;
  54  default:
  55   goto out;
  56  }
  57  if ((( __u32)(__be32)(sb->s_maxlen)) < journal->j_maxlen)
  58   journal->j_maxlen = (( __u32)(__be32)(sb->s_maxlen));
  59  else if ((( __u32)(__be32)(sb->s_maxlen)) > journal->j_maxlen) {
  60   printk ("JBD: journal file too short\n");
  61   goto out;
  62  }
  63  return 0;
  64 out:
  65  journal_fail_superblock(journal);
  66  return err;
  67 }
  68 static int load_superblock(journal_t *journal)
  69 {
  70  journal_get_superblock(journal);
  71  return 0;
  72 }
  73 int jbd2_journal_update_format (journal_t *journal)
  74 {
  75  journal_get_superblock(journal);
  76  return 0;
  77 }
  78 int jbd2_journal_wipe(journal_t *journal, int write)
  79 {
  80  load_superblock(journal);
  81  return 0;
  82 }