re PR target/77738 (Invalid initialisation of ar.lc register)

PR target/77738
* config/ia64/ia64.md ("doloop_end"): Reject if mode of loop
pseudo is not DImode.

From-SVN: r240918

gcc/ChangeLog

+2016-10-10  Andreas Schwab  <schwab@suse.de>
+
+	PR target/77738
+	* config/ia64/ia64.md ("doloop_end"): Reject if mode of loop
+	pseudo is not DImode.
+
 2016-10-10  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* common/config/arc/arc-common.c (arc_option_optimization_table):

gcc/config/ia64/ia64.md

@@ -3959,6 +3959,9 @@
    (use (match_operand 1 "" ""))]	; label
   ""
 {
+  if (GET_MODE (operands[0]) != DImode)
+    FAIL;
+
   emit_jump_insn (gen_doloop_end_internal (gen_rtx_REG (DImode, AR_LC_REGNUM),
 					   operands[1]));
   DONE;