re PR tree-optimization/65310 (vectorizer uses wrong alignment)

2015-03-11  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/65310
	* tree-sra.c (build_ref_for_offset): Also preserve larger
	alignment.

From-SVN: r221348

gcc/ChangeLog

+2015-03-11  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/65310
+	* tree-sra.c (build_ref_for_offset): Also preserve larger
+	alignment.
+
 2015-03-11  Marat Zakirov  <m.zakirov@samsung.com>
 
 	* asan.c (instrument_derefs): Disable instrumentation on asan-globals=0.

gcc/tree-sra.c

@@ -1597,7 +1597,7 @@ build_ref_for_offset (location_t loc, tree base, HOST_WIDE_INT offset,
   misalign = (misalign + offset) & (align - 1);
   if (misalign != 0)
     align = (misalign & -misalign);
-  if (align < TYPE_ALIGN (exp_type))
+  if (align != TYPE_ALIGN (exp_type))
     exp_type = build_aligned_type (exp_type, align);
 
   mem_ref = fold_build2_loc (loc, MEM_REF, exp_type, base, off);