ira.c bb_loop_depth

	PR rtl-optimization/71275
	* ira.c (ira): Call loop_optimizer_init to set up bb_loop_depth
	for update_equiv_regs and combine_and_move_insns.

From-SVN: r236789

gcc/ChangeLog

+2016-05-27  Alan Modra  <amodra@gmail.com>
+
+	PR rtl-optimization/71275
+	* ira.c (ira): Call loop_optimizer_init to set up bb_loop_depth
+	for update_equiv_regs and combine_and_move_insns.
+
 2016-05-26  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (*movqi_internal) <attr "isa">: Use

gcc/ira.c

@@ -5171,6 +5171,7 @@ ira (FILE *f)
     ira_set_pseudo_classes (true, ira_dump_file);
 
   init_alias_analysis ();
+  loop_optimizer_init (AVOID_CFG_MODIFICATIONS);
   reg_equiv = XCNEWVEC (struct equivalence, max_reg_num ());
   update_equiv_regs ();
 
@@ -5186,6 +5187,7 @@ ira (FILE *f)
   if (optimize)
     add_store_equivs ();
 
+  loop_optimizer_finalize ();
   end_alias_analysis ();
   free (reg_equiv);