tree-ssa-loop-ivopts.c (get_shiftadd_cost): Check equality using operand_equal_p.

	* tree-ssa-loop-ivopts.c (get_shiftadd_cost): Check equality
	using operand_equal_p.

From-SVN: r204498

gcc/ChangeLog

 2013-11-07  Bin Cheng  <bin.cheng@arm.com>
 
+	* tree-ssa-loop-ivopts.c (get_shiftadd_cost): Check equality
+	using operand_equal_p.
+
+2013-11-07  Bin Cheng  <bin.cheng@arm.com>
+
 	* tree-ssa-loop-ivopts.c (alloc_iv): Lower address expressions.
 	* tree-affine.c (get_inner_reference_aff): Return base.
 	* tree-affine.h (get_inner_reference_aff): Change prototype.

gcc/tree-ssa-loop-ivopts.c

@@ -3500,17 +3500,21 @@ get_shiftadd_cost (tree expr, enum machine_mode mode, comp_cost cost0,
   int m = exact_log2 (int_cst_value (cst));
   int maxm = MIN (BITS_PER_WORD, GET_MODE_BITSIZE (mode));
   int sa_cost;
+  bool equal_p = false;
 
   if (!(m >= 0 && m < maxm))
     return false;
 
+  if (operand_equal_p (op1, mult, 0))
+    equal_p = true;
+
   sa_cost = (TREE_CODE (expr) != MINUS_EXPR
              ? shiftadd_cost (speed, mode, m)
-             : (mult == op1
+             : (equal_p
                 ? shiftsub1_cost (speed, mode, m)
                 : shiftsub0_cost (speed, mode, m)));
   res = new_cost (sa_cost, 0);
-  res = add_costs (res, mult == op1 ? cost0 : cost1);
+  res = add_costs (res, equal_p ? cost0 : cost1);
 
   STRIP_NOPS (multop);
   if (!is_gimple_val (multop))