re PR tree-optimization/54031 (Revision 189607 miscompiles Linux kernel)

2012-07-20  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/54031
	* tree-ssa-ccp.c (get_value_from_alignment): Use
	get_pointer_alignment_1.

From-SVN: r189715

gcc/ChangeLog

 2012-07-20  Richard Guenther  <rguenther@suse.de>
 
+	PR tree-optimization/54031
+	* tree-ssa-ccp.c (get_value_from_alignment): Use
+	get_pointer_alignment_1.
+
+2012-07-20  Richard Guenther  <rguenther@suse.de>
+
 	* tree-inline.c (add_local_variables): Remove check_var_ann
 	parameter and dead code.
 	(expand_call_inline): Adjust.

gcc/tree-ssa-ccp.c

@@ -510,7 +510,7 @@ get_value_from_alignment (tree expr)
 
   gcc_assert (TREE_CODE (expr) == ADDR_EXPR);
 
-  get_object_alignment_1 (TREE_OPERAND (expr, 0), &align, &bitpos);
+  get_pointer_alignment_1 (expr, &align, &bitpos);
   val.mask
     = double_int_and_not (POINTER_TYPE_P (type) || TYPE_UNSIGNED (type)
 			  ? double_int_mask (TYPE_PRECISION (type))