tree-ssa-loop-manip.c (lv_adjust_loop_header_phi): Use find_edge to find the…

tree-ssa-loop-manip.c (lv_adjust_loop_header_phi): Use find_edge to find the index of a PHI argument.

	* tree-ssa-loop-manip.c (lv_adjust_loop_header_phi): Use
	find_edge to find the index of a PHI argument.

From-SVN: r91155

gcc/ChangeLog

@@ -3,6 +3,9 @@
 	* tree-ssa-pre.c (phi_translate): Use find_edge to find the
 	index of a PHI argument.
 
+	* tree-ssa-loop-manip.c (lv_adjust_loop_header_phi): Use
+	find_edge to find the index of a PHI argument.
+
 2004-11-24  Steven Bosscher  <stevenb@suse.de>
 
 	* expr.c (expand_expr_real_1): Remove cases for EXIT_BLOCK_EXPR 

gcc/tree-ssa-loop-manip.c

@@ -667,14 +667,12 @@ lv_adjust_loop_header_phi (basic_block first, basic_block second,
        phi2 && phi1; 
        phi2 = PHI_CHAIN (phi2),  phi1 = PHI_CHAIN (phi1))
     {
-      int i;
-      for (i = 0; i < PHI_NUM_ARGS (phi2); i++)
+      edge e2 = find_edge (new_head, second);
+
+      if (e2)
 	{
-	  if (PHI_ARG_EDGE (phi2, i)->src == new_head)
-	    {
-	      tree def = PHI_ARG_DEF (phi2, i);
-	      add_phi_arg (&phi1, def, e);
-	    }
+	  tree def = PHI_ARG_DEF (phi2, e2->dest_idx);
+	  add_phi_arg (&phi1, def, e);
 	}
     }
 }