re PR rtl-optimization/84157 ([nvptx] ICE: RTL check: expected code 'reg', have 'lshiftrt')

	PR rtl-optimization/84157
	* combine.c (change_zero_ext): Use REG_P predicate in
	front of HARD_REGISTER_P predicate.

From-SVN: r257302

gcc/ChangeLog

+2018-02-01  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR rtl-optimization/84157
+	* combine.c (change_zero_ext): Use REG_P predicate in
+	front of HARD_REGISTER_P predicate.
+
 2018-02-01  Georg-Johann Lay  <avr@gjlay.de>
 
 	* config/avr/avr.c (avr_option_override): Move disabling of

gcc/combine.c

@@ -11483,7 +11483,7 @@ change_zero_ext (rtx pat)
 
 	  if (mode != inner_mode)
 	    {
-	      if (HARD_REGISTER_P (x)
+	      if (REG_P (x) && HARD_REGISTER_P (x)
 		  && !can_change_dest_mode (x, 0, mode))
 		continue;
 
@@ -11501,7 +11501,7 @@ change_zero_ext (rtx pat)
 	  x = SUBREG_REG (XEXP (x, 0));
 	  if (GET_MODE (x) != mode)
 	    {
-	      if (HARD_REGISTER_P (x)
+	      if (REG_P (x) && HARD_REGISTER_P (x)
 		  && !can_change_dest_mode (x, 0, mode))
 		continue;