S/390: Fix RTL sharing when generating reg note.

gcc/ChangeLog:

2016-12-02  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* config/s390/s390.c (s390_save_gprs_to_fprs): Fix RTL sharing
	problem.

From-SVN: r243173

gcc/ChangeLog

+2016-12-02  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
+
+	* config/s390/s390.c (s390_save_gprs_to_fprs): Fix RTL sharing
+	problem.
+
 2016-12-02  Georg-Johann Lay  <avr@gjlay.de>
 
 	* config/avr/avr-arch.h (avr_mcu_t) [n_flash]: Remove field.

gcc/config/s390/s390.c

@@ -10666,7 +10666,7 @@ s390_save_gprs_to_fprs (void)
 	  /* This prevents dwarf2cfi from interpreting the set.  Doing
 	     so it might emit def_cfa_register infos setting an FPR as
 	     new CFA.  */
-	  add_reg_note (insn, REG_CFA_REGISTER, PATTERN (insn));
+	  add_reg_note (insn, REG_CFA_REGISTER, copy_rtx (PATTERN (insn)));
 	}
     }
 }