expmed.c (store_bit_field): Use simplify_gen_subreg to make SUBREG so we avoid SUBREGing memory.

        * expmed.c (store_bit_field): Use simplify_gen_subreg to make
        SUBREG so we avoid SUBREGing memory.

From-SVN: r46721

gcc/ChangeLog

+2001-11-02  Aldy Hernandez  <aldyh@redhat.com>
+
+        * expmed.c (store_bit_field): Use simplify_gen_subreg to make
+        SUBREG so we avoid SUBREGing memory.
+
 2001-11-02  DJ Delorie  <dj@redhat.com>
 
 	* config/rs6000/rs6000.c (rs6000_emit_move): Make sure that

gcc/expmed.c

@@ -638,12 +638,7 @@ store_bit_field (str_rtx, bitsize, bitnum, fieldmode, value, align, total_size)
 		 if we must narrow it, be sure we do it correctly.  */
 
 	      if (GET_MODE_SIZE (GET_MODE (value)) < GET_MODE_SIZE (maxmode))
-		{
-		  /* Avoid making subreg of a subreg, or of a mem.  */
-		  if (GET_CODE (value1) != REG)
-		    value1 = copy_to_reg (value1);
-		  value1 = gen_rtx_SUBREG (maxmode, value1, 0);
-		}
+		value1 = simplify_gen_subreg (maxmode, value1, GET_MODE (value1), 0);
 	      else
 		value1 = gen_lowpart (maxmode, value1);
 	    }