[tree-ssa] Obvious change in compute_dominance_frontiers

[Zdenek Dvorak]

Hello,

compute_dominance_frontiers assumes that
BASIC_BLOCK (0) == ENTRY_BLOCK_PTR->succ->dest, which does not have to
be the case in general.  The change commited as obvious.

Zdenek

	* tree-cfg.c (compute_dominance_frontiers): Don't assume that
	the first block has index 0.

Index: tree-cfg.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/Attic/tree-cfg.c,v
retrieving revision 1.1.4.231
diff -c -3 -p -r1.1.4.231 tree-cfg.c
*** tree-cfg.c	7 Dec 2003 10:07:45 -0000	1.1.4.231
--- tree-cfg.c	7 Dec 2003 20:13:47 -0000
*************** compute_dominance_frontiers (bitmap *fro
*** 1887,1893 ****
  
    sbitmap_zero (done);
  
!   compute_dominance_frontiers_1 (frontiers, idom, 0, done);
  
    sbitmap_free (done);
  
--- 1887,1895 ----
  
    sbitmap_zero (done);
  
!   compute_dominance_frontiers_1 (frontiers, idom,
! 				 ENTRY_BLOCK_PTR->succ->dest->index,
! 				 done);
  
    sbitmap_free (done);