re PR middle-end/45379 (~10% slowdown on test_fpu at revision 163278)

2010-08-25  Richard Guenther  <rguenther@suse.de>

	PR middle-end/45379
	* emit-rtl.c (set_mem_attributes_minus_bitpos): Handle
	TARGET_MEM_REF in alignment computation.

From-SVN: r163540

gcc/ChangeLog

+2010-08-25  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/45379
+	* emit-rtl.c (set_mem_attributes_minus_bitpos): Handle
+	TARGET_MEM_REF in alignment computation.
+
 2010-08-25  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/45059

gcc/emit-rtl.c

@@ -1615,6 +1615,11 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
 	align = MAX (align, TYPE_ALIGN (type));
     }
 
+  else if (TREE_CODE (t) == TARGET_MEM_REF)
+    /* ??? This isn't fully correct, we can't set the alignment from the
+       type in all cases.  */
+    align = MAX (align, TYPE_ALIGN (type));
+
   else if (TREE_CODE (t) == MISALIGNED_INDIRECT_REF)
     {
       if (integer_zerop (TREE_OPERAND (t, 1)))