[Bug middle-end/45379] [4.6 Regression] ~10% slowdown on test_fpu at revision 163278

[rguenth at gcc dot gnu dot org]

------- Comment #12 from rguenth at gcc dot gnu dot org  2010-08-24 15:48 -------
Try

Index: emit-rtl.c
===================================================================
--- emit-rtl.c  (revision 163519)
+++ emit-rtl.c  (working copy)
@@ -1615,6 +1615,11 @@ set_mem_attributes_minus_bitpos (rtx ref
        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)))


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45379