[PATCH] Fix loop dumping ICEs

[Richard Guenther]

Bootstrapped on x86_64-unknown-linux-gnu, committed.

Richard.

2012-08-13  Richard Guenther  <rguent...@suse.de>

        * tree-cfg.c (print_loop): Avoid ICEing for loops marked for
        removal and loops with multiple latches.

Index: gcc/tree-cfg.c
===================================================================
*** gcc/tree-cfg.c      (revision 190339)
--- gcc/tree-cfg.c      (working copy)
*************** print_loop (FILE *file, struct loop *loo
*** 6870,6877 ****
    s_indent[indent] = '\0';
  
    /* Print loop's header.  */
!   fprintf (file, "%sloop_%d (header = %d, latch = %d", s_indent,
!          loop->num, loop->header->index, loop->latch->index);
    fprintf (file, ", niter = ");
    print_generic_expr (file, loop->nb_iterations, 0);
  
--- 6969,6986 ----
    s_indent[indent] = '\0';
  
    /* Print loop's header.  */
!   fprintf (file, "%sloop_%d (", s_indent, loop->num);
!   if (loop->header)
!     fprintf (file, "header = %d", loop->header->index);
!   else
!     {
!       fprintf (file, "deleted)\n");
!       return;
!     }
!   if (loop->latch)
!     fprintf (file, ", latch = %d", loop->latch->index);
!   else
!     fprintf (file, ", multiple latches");
    fprintf (file, ", niter = ");
    print_generic_expr (file, loop->nb_iterations, 0);