[Bug tree-optimization/55684] [4.8 Regression] ICE in remove_redundant_iv_tests, at tree-ssa-loop-ivcanon.c:559

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55684

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|i?86-*-*                    |i?86-*-*, x86_64-*-*
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-12-14
     Ever Confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-14 10:16:57 UTC ---
Reduced testcase:

typedef struct _IO_FILE FILE;
unsigned long int strtoul(const char *, char **, int);
char *fgets(char *, int, FILE *);
struct ihexrec {
    unsigned char reclen;
    unsigned char data[256];
};
static void srec_readrec(struct ihexrec * srec, char * rec)
{
  int i, j;
  char buf[8];
  int offset = 0, len;
  char * e;
  for (i=0; j<srec->reclen; j++)
    {
      if (offset+2 > len)
        return;
      for (i=0; i<2; i++)
        buf[i] = rec[offset++];
      srec->data[j] = strtoul(buf, &e, 16);
    }
  for (i=0; i<2; i++)
    buf[i] = rec[offset++];
}
void srec2b(FILE *inf)
{
  char buffer[256];
  struct ihexrec srec;
  while (fgets(buffer,256,inf)!=(void *)0)
    srec_readrec(&srec, buffer);
}

> ./cc1 -quiet -O2 fileio.3.3.i
fileio.3.3.i: In function 'srec2b':
fileio.3.3.i:25:6: internal compiler error: in remove_redundant_iv_tests, at
tree-ssa-loop-ivcanon.c:559
 void srec2b(FILE *inf)
      ^