re PR rtl-optimization/72821 (RTL check: expected elt 2 type 'B', have '0' (rtx…

re PR rtl-optimization/72821 (RTL check: expected elt 2 type 'B', have '0' (rtx barrier) in BLOCK_FOR_INSN, at rtl.h:1424)

	PR rtl-optimization/72821
	* lra-spills.c (regno_in_use_p): Don't use BLOCK_FOR_INSN on barriers,
	just return false for them.

From-SVN: r239241

gcc/ChangeLog

+2016-08-08  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/72821
+	* lra-spills.c (regno_in_use_p): Don't use BLOCK_FOR_INSN on barriers,
+	just return false for them.
+
 2016-08-08  Alan Modra  <amodra@gmail.com>
 
 	PR target/72771

gcc/lra-spills.c

@@ -697,9 +697,10 @@ regno_in_use_p (rtx_insn *insn, unsigned int regno)
   int i, arg_regno;
   basic_block bb = BLOCK_FOR_INSN (insn);
 
-  while ((insn = next_nondebug_insn (insn)) != NULL_RTX
-	 && bb == BLOCK_FOR_INSN (insn))
+  while ((insn = next_nondebug_insn (insn)) != NULL_RTX)
     {
+      if (BARRIER_P (insn) || bb != BLOCK_FOR_INSN (insn))
+	return false;
       if (! INSN_P (insn))
 	continue;
       if (GET_CODE (PATTERN (insn)) == USE