re PR rtl-optimization/61522 (ICE while building libgcc in LRA)

2014-06-16  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/61522
	* lra-assigns.c (assign_by_spills): Check null
	targetm.spill_class.

From-SVN: r211711

gcc/ChangeLog

+2014-06-16  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/61522
+	* lra-assigns.c (assign_by_spills): Check null
+	targetm.spill_class.
+
 2014-06-16  Jan Hubicka  <hubicka@ucw.cz>
 
 	Revert:

gcc/lra-assigns.c

@@ -1425,7 +1425,8 @@ assign_by_spills (void)
 	      enum reg_class rclass = lra_get_allocno_class (regno);
 	      enum reg_class spill_class;
 	      
-	      if (lra_reg_info[regno].restore_regno < 0
+	      if (targetm.spill_class == NULL
+		  || lra_reg_info[regno].restore_regno < 0
 		  || ! bitmap_bit_p (&lra_inheritance_pseudos, regno)
 		  || (spill_class
 		      = ((enum reg_class)