ira.c (ira_update_equiv_info_by_shuffle_insn): Use copy_rtx for REG_EQUIV argument.

	* ira.c (ira_update_equiv_info_by_shuffle_insn): Use copy_rtx
	for REG_EQUIV argument.

From-SVN: r243017

gcc/ChangeLog

+2016-11-30  Jakub Jelinek  <jakub@redhat.com>
+
+	* ira.c (ira_update_equiv_info_by_shuffle_insn): Use copy_rtx
+	for REG_EQUIV argument.
+
 2016-11-30  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
 	* config/arm/t-rmprofile: Add mappings for Cortex-M23 and Cortex-M33.

gcc/ira.c

@@ -2647,7 +2647,7 @@ ira_update_equiv_info_by_shuffle_insn (int to_regno, int from_regno, rtx_insn *i
 	}
       if (find_reg_note (insn, REG_EQUIV, x) == NULL_RTX)
 	{
-	  note = set_unique_reg_note (insn, REG_EQUIV, x);
+	  note = set_unique_reg_note (insn, REG_EQUIV, copy_rtx (x));
 	  gcc_assert (note != NULL_RTX);
 	  if (internal_flag_ira_verbose > 3 && ira_dump_file != NULL)
 	    {