tree-ssa-dom.c (tree_ssa_dominator_optimize): Do not free dominance info after purging EH edges.

	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Do not free dominance
	info after purging EH edges.
	(eliminate_degenerate_phis): Likewise.

From-SVN: r124499

gcc/ChangeLog

 2007-05-07  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Reset cfg_altered.
-	Free dominance info before purging EH edges as well as after.
+	Free dominance info before purging EH edges.
 	(eliminate_degenerate_phis): Likewise.
 	(propagate_rhs_into_lhs): Set cfg_altered to true instead of 1.
 

gcc/tree-ssa-dom.c

@@ -328,8 +328,7 @@ tree_ssa_dominator_optimize (void)
      such edges from the CFG as needed.  */
   if (!bitmap_empty_p (need_eh_cleanup))
     {
-      if (tree_purge_all_dead_eh_edges (need_eh_cleanup))
-	free_dominance_info (CDI_DOMINATORS);
+      tree_purge_all_dead_eh_edges (need_eh_cleanup);
       bitmap_zero (need_eh_cleanup);
     }
 
@@ -2533,8 +2532,7 @@ eliminate_degenerate_phis (void)
      such edges from the CFG as needed.  */
   if (!bitmap_empty_p (need_eh_cleanup))
     {
-      if (tree_purge_all_dead_eh_edges (need_eh_cleanup))
-	free_dominance_info (CDI_DOMINATORS);
+      tree_purge_all_dead_eh_edges (need_eh_cleanup);
       BITMAP_FREE (need_eh_cleanup);
     }