revert: tree-ssa-loop-ivopts.c (may_be_nonaddressable_p): Make case self-contained.

Revert:

	* tree-ssa-loop-ivopts.c (may_be_nonaddressable_p) <VIEW_CONVERT_EXPR>:
	Make case self-contained.
	<ARRAY_REF>: Test TYPE_NONALIASED_COMPONENT flag.

From-SVN: r144028

gcc/ChangeLog

-2009-02-08  Eric Botcazou  <ebotcazou@adacore.com>
-
-	* tree-ssa-loop-ivopts.c (may_be_nonaddressable_p) <VIEW_CONVERT_EXPR>:
-	Make case self-contained.
-	<ARRAY_REF>: Test TYPE_NONALIASED_COMPONENT flag.
-
 2009-02-07  Anatoly Sokolov  <aesok@post.ru>
 
 	* config/avr/avr.c (avr_mcu_t): Add ata6289 device.

gcc/tree-ssa-loop-ivopts.c

@@ -1562,14 +1562,15 @@ may_be_nonaddressable_p (tree expr)
 	 and make them look addressable.  After some processing the
 	 non-addressability may be uncovered again, causing ADDR_EXPRs
 	 of inappropriate objects to be built.  */
-      return is_gimple_reg (TREE_OPERAND (expr, 0))
-	     || !is_gimple_addressable (TREE_OPERAND (expr, 0))
-	     || may_be_nonaddressable_p (TREE_OPERAND (expr, 0));
+      if (is_gimple_reg (TREE_OPERAND (expr, 0))
+	  || !is_gimple_addressable (TREE_OPERAND (expr, 0)))
+	return true;
+
+      /* ... fall through ... */
 
     case ARRAY_REF:
     case ARRAY_RANGE_REF:
-      return TYPE_NONALIASED_COMPONENT (TREE_TYPE (TREE_OPERAND (expr, 0)))
-	     || may_be_nonaddressable_p (TREE_OPERAND (expr, 0));
+      return may_be_nonaddressable_p (TREE_OPERAND (expr, 0));
 
     CASE_CONVERT:
       return true;