re PR tree-optimization/53970 (-ftree-vectorization does not handle well unaligned data)

2012-07-18  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/53970
	* tree.h (contains_packed_reference): Remove.
	* expr.c (contains_packed_reference): Likewise.
	* tree-vect-data-refs.c (not_size_aligned): New function.
	(vector_alignment_reachable_p): Use it.
	(vect_supportable_dr_alignment): Likewise.

	* g++.dg/torture/pr53970.C: New testcase.

From-SVN: r189609

1 files changed, 0 insertions, 41 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 880e1bc..3ba5743 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -6709,47 +6709,6 @@ get_inner_reference (tree exp, HOST_WIDE_INT *pbitsize,
   return exp;
 }
 
-/* Given an expression EXP that may be a COMPONENT_REF, an ARRAY_REF or an
-   ARRAY_RANGE_REF, look for whether EXP or any nested component-refs within
-   EXP is marked as PACKED.  */
-
-bool
-contains_packed_reference (const_tree exp)
-{
-  bool packed_p = false;
-
-  while (1)
-    {
-      switch (TREE_CODE (exp))
-	{
-	case COMPONENT_REF:
-	  {
-	    tree field = TREE_OPERAND (exp, 1);
-	    packed_p = DECL_PACKED (field)
-		       || TYPE_PACKED (TREE_TYPE (field))
-		       || TYPE_PACKED (TREE_TYPE (exp));
-	    if (packed_p)
-	      goto done;
-	  }
-	  break;
-
-	case BIT_FIELD_REF:
-	case ARRAY_REF:
-	case ARRAY_RANGE_REF:
-	case REALPART_EXPR:
-	case IMAGPART_EXPR:
-	case VIEW_CONVERT_EXPR:
-	  break;
-
-	default:
-	  goto done;
-	}
-      exp = TREE_OPERAND (exp, 0);
-    }
- done:
-  return packed_p;
-}
-
 /* Return a tree of sizetype representing the size, in bytes, of the element
    of EXP, an ARRAY_REF or an ARRAY_RANGE_REF.  */