re PR rtl-optimization/82338 (valgrind error in inherit_in_ebb)

2017-09-29  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/82338
	* lra-constraints.c (inherit_in_ebb): Check usage_insns check.

From-SVN: r253299

gcc/ChangeLog

+2017-09-29  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/82338
+	* lra-constraints.c (inherit_in_ebb): Check usage_insns check.
+
 2017-09-29  Alexander Monakov  <amonakov@ispras.ru>
 
 	* genmodes.c (calc_wider_mode): Suppress qsort macro.

gcc/lra-constraints.c

@@ -6219,6 +6219,7 @@ inherit_in_ebb (rtx_insn *head, rtx_insn *tail)
 		  && ((cheap = XEXP (cheap, 0)), true)
 		  && (regno = REGNO (cheap)) >= FIRST_PSEUDO_REGISTER
 		  && (hard_regno = reg_renumber[regno]) >= 0
+		  && usage_insns[regno].check == curr_usage_insns_check
 		  /* If there are pending saves/restores, the
 		     optimization is not worth.	 */
 		  && usage_insns[regno].calls_num == calls_num - 1