avr.c (avr_hard_regno_call_part_clobbered): Use LAST_CALLEE_SAVED_REG instead of…

avr.c (avr_hard_regno_call_part_clobbered): Use LAST_CALLEE_SAVED_REG instead of hard-coded register number.

	* config/avr/avr.c (avr_hard_regno_call_part_clobbered): Use
	LAST_CALLEE_SAVED_REG instead of hard-coded register number.
	(Last callee saved reg is different for AVR_TINY architecture)

From-SVN: r223009

gcc/ChangeLog

+2015-05-11  Pitchumani Sivanupandi  <pitchumani.s@atmel.com>
+
+	* config/avr/avr.c (avr_hard_regno_call_part_clobbered): Use
+	LAST_CALLEE_SAVED_REG instead of hard-coded register number.
+	(Last callee saved reg is different for AVR_TINY architecture)
+
 2015-05-11  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (ix86_loop_unroll_adjust): Use PATTERN (insn)

gcc/config/avr/avr.c

@@ -11332,9 +11332,10 @@ avr_hard_regno_call_part_clobbered (unsigned regno, machine_mode mode)
     return 0;
 
   /* Return true if any of the following boundaries is crossed:
-     17/18, 27/28 and 29/30.  */
+     17/18 or 19/20 (if AVR_TINY), 27/28 and 29/30.  */
 
-  return ((regno < 18 && regno + GET_MODE_SIZE (mode) > 18)
+  return ((regno <= LAST_CALLEE_SAVED_REG &&
+           regno + GET_MODE_SIZE (mode) > (LAST_CALLEE_SAVED_REG + 1))
           || (regno < REG_Y && regno + GET_MODE_SIZE (mode) > REG_Y)
           || (regno < REG_Z && regno + GET_MODE_SIZE (mode) > REG_Z));
 }