tree-ssa-propagate.c (substitute_and_fold): Fix stmt walking on deletion of the last stmt.

2008-05-16  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-propagate.c (substitute_and_fold): Fix stmt walking
	on deletion of the last stmt.

From-SVN: r135412

gcc/ChangeLog

+2008-05-16  Richard Guenther  <rguenther@suse.de>
+
+	* tree-ssa-propagate.c (substitute_and_fold): Fix stmt walking
+	on deletion of the last stmt.
+
 2008-05-15  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config/i386/i386.c (ix86_expand_vector_init_general): Optimize

gcc/tree-ssa-propagate.c

@@ -1250,6 +1250,7 @@ substitute_and_fold (prop_value_t *prop_value, bool use_ranges_p)
 	      && (!(call = get_call_expr_in (stmt))
 		  || !TREE_SIDE_EFFECTS (call)))
 	    {
+	      block_stmt_iterator i2;
 	      if (dump_file && dump_flags & TDF_DETAILS)
 		{
 		  fprintf (dump_file, "Removing dead stmt ");
@@ -1257,10 +1258,10 @@ substitute_and_fold (prop_value_t *prop_value, bool use_ranges_p)
 		  fprintf (dump_file, "\n");
 		}
 	      prop_stats.num_dce++;
-	      bsi_remove (&i, true);
+	      bsi_prev (&i);
+	      i2 = bsi_for_stmt (stmt);
+	      bsi_remove (&i2, true);
 	      release_defs (stmt);
-	      if (!bsi_end_p (i))
-	        bsi_prev (&i);
 	      continue;
 	    }