[Bug middle-end/33670] New: cc1 segfault with -O2 -fsched-stalled-insns=0 for twolf

[janis at gcc dot gnu dot org]

Benchmark twolf in SPEC CPU2000 fails to compile on powerpc64-linux with -O2
-fsched-stalled-insns=[01234] (didn't try other values).  The following
testcase also fails for powerpc*-*-* and ia64-linux cross cc1:

  typedef struct binbox { int p; int n; } B;
  extern B ***binptr;
  extern int ablock;

  int
  foo ()
  {
    int bin, lobin, hibin;
    for (bin = lobin; bin <= hibin; bin++)
      binptr[ablock][bin]->n = binptr[ablock][bin]->p;
  }

with output

  bug8.c: In function ‘foo’:
  bug8.c:11: internal compiler error: Segmentation fault
  Please submit a full bug report,
  with preprocessed source if appropriate.
  See <http://gcc.gnu.org/bugs.html> for instructions.

The segfault occurs in sd_lists_size at sched-depc.s:600 with list=0.

The failure shows up with this patch:

    http://gcc.gnu.org/viewcvs?view=rev&rev=127405

    r127405 | mkuvyrkov | 2007-08-14 06:40:34 +0000 (Tue, 14 Aug 2007)


-- 
           Summary: cc1 segfault with -O2 -fsched-stalled-insns=0 for twolf
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
GCC target triplet: powerpc*-*-*, ia64


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33670