re PR target/81819 ([RX] internal compiler error: in…

re PR target/81819 ([RX] internal compiler error: in rx_is_restricted_memory_address, at config/rx/rx.c:311)

gcc/
	PR target/81819
	* config/rx/rx.c (rx_is_restricted_memory_address):
	Handle SUBREG case.

From-SVN: r256578

gcc/ChangeLog

+2018-01-12  Oleg Endo  <olegendo@gcc.gnu.org>
+
+	PR target/81819
+	* config/rx/rx.c (rx_is_restricted_memory_address):
+	Handle SUBREG case.
+
 2018-01-12  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/80846

gcc/config/rx/rx.c

@@ -288,6 +288,9 @@ rx_is_restricted_memory_address (rtx mem, machine_mode mode)
       /* Simple memory addresses are OK.  */
       return true;
 
+    case SUBREG:
+      return RX_REG_P (SUBREG_REG (mem));
+
     case PRE_DEC:
     case POST_INC:
       return false;