re PR c/61271 (10 * possible coding error with logical not (!))

	PR c/61271
	* expr.c (is_aligning_offset): Remove logical not.

From-SVN: r214496

gcc/ChangeLog

 2014-08-26  Marek Polacek  <polacek@redhat.com>
 
 	PR c/61271
+	* expr.c (is_aligning_offset): Remove logical not.
+
+2014-08-26  Marek Polacek  <polacek@redhat.com>
+
+	PR c/61271
 	* tree-vectorizer.h (LOOP_REQUIRES_VERSIONING_FOR_ALIGNMENT,
 	LOOP_REQUIRES_VERSIONING_FOR_ALIAS): Wrap in parens.
 

gcc/expr.c

@@ -10723,7 +10723,7 @@ is_aligning_offset (const_tree offset, const_tree exp)
       || !tree_fits_uhwi_p (TREE_OPERAND (offset, 1))
       || compare_tree_int (TREE_OPERAND (offset, 1),
 			   BIGGEST_ALIGNMENT / BITS_PER_UNIT) <= 0
-      || !exact_log2 (tree_to_uhwi (TREE_OPERAND (offset, 1)) + 1) < 0)
+      || exact_log2 (tree_to_uhwi (TREE_OPERAND (offset, 1)) + 1) < 0)
     return 0;
 
   /* Look at the first operand of BIT_AND_EXPR and strip any conversion.