re PR middle-end/65315 (incorrect alignment of local variable with aligned attribute)

2015-03-05  Steve Ellcey  <sellcey@imgtec.com>

	PR middle-end/65315
	* cfgexpand.c (expand_stack_vars): Update large_align to maximum
	needed alignment.

From-SVN: r221219

gcc/ChangeLog

+2015-03-05  Steve Ellcey  <sellcey@imgtec.com>
+
+	PR middle-end/65315
+	* cfgexpand.c (expand_stack_vars): Update large_align to maximum
+	needed alignment.
+
 2015-03-05  Martin Liska  <mliska@suse.cz>
 
 	* ipa-inline.c (inline_small_functions): Set default value to

gcc/cfgexpand.c

@@ -973,6 +973,13 @@ expand_stack_vars (bool (*pred) (size_t), struct stack_vars_data *data)
 	  i = stack_vars_sorted[si];
 	  alignb = stack_vars[i].alignb;
 
+	  /* All "large" alignment decls come before all "small" alignment
+	     decls, but "large" alignment decls are not sorted based on
+	     their alignment.  Increase large_align to track the largest
+	     required alignment.  */
+	  if ((alignb * BITS_PER_UNIT) > large_align)
+	    large_align = alignb * BITS_PER_UNIT;
+
 	  /* Stop when we get to the first decl with "small" alignment.  */
 	  if (alignb * BITS_PER_UNIT <= MAX_SUPPORTED_STACK_ALIGNMENT)
 	    break;