re PR middle-end/56461 (GCC is leaking lots of memory)

	PR middle-end/56461
	* lra.c (lra): Call lra_clear_live_ranges if live_p,
	right before calling lra_create_live_ranges, also call it
	when clearing live_p.  Only call lra_clear_live_ranges
	at the end if live_p.

From-SVN: r196468

gcc/ChangeLog

 2013-03-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/56461
+	* lra.c (lra): Call lra_clear_live_ranges if live_p,
+	right before calling lra_create_live_ranges, also call it
+	when clearing live_p.  Only call lra_clear_live_ranges
+	at the end if live_p.
+
+	PR middle-end/56461
 	* sched-deps.c (delete_dep_node): Free DEP_REPLACE.
 
 2013-03-05  Richard Biener  <rguenther@suse.de>

gcc/lra.c

@@ -2291,6 +2291,8 @@ lra (FILE *f)
 	  /* Do inheritance only for regular algorithms.  */
 	  if (! lra_simple_p)
 	    lra_inheritance ();
+	  if (live_p)
+	    lra_clear_live_ranges ();
 	  /* We need live ranges for lra_assign -- so build them.  */
 	  lra_create_live_ranges (true);
 	  live_p = true;
@@ -2308,6 +2310,8 @@ lra (FILE *f)
 		live_p = false;
 	      if (lra_undo_inheritance ())
 		live_p = false;
+	      if (! live_p)
+		lra_clear_live_ranges ();
 	    }
 	}
       bitmap_clear (&lra_optional_reload_pseudos);
@@ -2334,7 +2338,8 @@ lra (FILE *f)
   lra_eliminate (true);
   lra_final_code_change ();
   lra_in_progress = 0;
-  lra_clear_live_ranges ();
+  if (live_p)
+    lra_clear_live_ranges ();
   lra_live_ranges_finish ();
   lra_constraints_finish ();
   finish_reg_info ();