[Bug tree-optimization/32230] New: [4.3 Regression] Segfault in set_bb_for_stmt with -O -ftree-vectorize

["tbm at cyrius dot com" <gcc-bugzilla at gcc dot gnu dot org>]

I'm getting the following segfault on trunk with -O -ftree-vectorize.
This was introduced between 20070422 and 20070515.

(sid)25522:tbm@em64t: ~] /usr/lib/gcc-snapshot/bin/gcc -O -ftree-vectorize -c
glame-waveform.c
glame-waveform.c: In function 'const_f':
glame-waveform.c:18: warning: comparison of distinct pointer types lacks a cast
glame-waveform.c:12: internal compiler error: Segmentation fault
Please submit a full bug report, [...]
(sid)25523:tbm@em64t: ~] /usr/lib/gcc-snapshot/bin/gcc -ftree-vectorize -c
glame-waveform.c
glame-waveform.c: In function 'const_f':
glame-waveform.c:18: warning: comparison of distinct pointer types lacks a cast
(sid)25524:tbm@em64t: ~]

Testcase:


typedef struct filter_buffer filter_buffer_t;
struct filter_buffer
{
  char buf[1];
};
typedef struct sbuf_header sbuf_header_t;
struct sbuf_header
{
  char buf[1];
}
const_f (filter_buffer_t *buf)
{
  float val;
  int i;

  for (i = 0; i < 10; i++)
    ((float
      *) (&((sbuf_header_t *) ((buf) == &(buf)->buf[0]))->buf[0]))[i] = val;
}


-- 
           Summary: [4.3 Regression] Segfault in set_bb_for_stmt with -O -
                    ftree-vectorize
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32230