[revert the minor PR45144 missed-optimization fix because it
 results in miscompilation of gnat on m68k with gcc-4.6 and 4.5;
 with gcc-4.7 other changes mask the issue <mikpe@it.uu.se>]

	PR ada/48835

Index: gcc-4.6-4.6.3/src/gcc/tree-sra.c
===================================================================
--- gcc-4.6-4.6.3.orig/src/gcc/tree-sra.c	2012-01-05 22:24:45.000000000 +0000
+++ gcc-4.6-4.6.3/src/gcc/tree-sra.c	2012-03-04 16:01:53.000000000 +0000
@@ -854,9 +854,6 @@
       {
 	tree ft = TREE_TYPE (fld);
 
-	if (DECL_BIT_FIELD (fld))
-	  return false;
-
 	if (!is_gimple_reg_type (ft)
 	    && !type_consists_of_records_p (ft))
 	  return false;
