tree-cfg.c (tree_redirect_edge_and_branch): Call find_edge only when needed.

	* tree-cfg.c (tree_redirect_edge_and_branch): Call find_edge
	only when needed.

From-SVN: r91476

gcc/ChangeLog

@@ -12,6 +12,9 @@
 	* cfgrtl.c (rtl_tidy_fallthru_edge): Speed up by using
 	EDGE_COUNT.
 
+	* tree-cfg.c (tree_redirect_edge_and_branch): Call find_edge
+	only when needed.
+
 2004-11-29  Alan Modra  <amodra@bigpond.net.au>
 
 	* varasm.c (default_elf_select_section_1): Only pass DECL_P decl

gcc/tree-cfg.c

@@ -4315,12 +4315,12 @@ tree_redirect_edge_and_branch (edge e, basic_block dest)
     case SWITCH_EXPR:
       {
         tree cases = get_cases_for_edge (e, stmt);
-	edge e2 = find_edge (e->src, dest);
 
 	/* If we have a list of cases associated with E, then use it
 	   as it's a lot faster than walking the entire case vector.  */
 	if (cases)
 	  {
+	    edge e2 = find_edge (e->src, dest);
 	    tree last, first;
 
 	    first = cases;