sel-sched: move cleanup_cfg before calculate_dominance_info (PR 85354)

	PR rtl-optimization/85354
	* sel-sched-ir.c (sel_init_pipelining): Move cfg_cleanup call...
	* sel-sched.c (sel_global_init): ... here.

From-SVN: r259348

gcc/ChangeLog

+2018-04-12  Alexander Monakov  <amonakov@ispras.ru>
+
+	PR rtl-optimization/85354
+	* sel-sched-ir.c (sel_init_pipelining): Move cfg_cleanup call...
+	* sel-sched.c (sel_global_init): ... here.
+
 2018-04-12  Eric Botcazou  <ebotcazou@adacore.com>
 
 	PR target/85238

gcc/sel-sched-ir.c

@@ -30,7 +30,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "cfgrtl.h"
 #include "cfganal.h"
 #include "cfgbuild.h"
-#include "cfgcleanup.h"
 #include "insn-config.h"
 #include "insn-attr.h"
 #include "recog.h"
@@ -6122,9 +6121,6 @@ make_regions_from_loop_nest (struct loop *loop)
 void
 sel_init_pipelining (void)
 {
-  /* Remove empty blocks: their presence can break assumptions elsewhere,
-     e.g. the logic to invoke update_liveness_on_insn in sel_region_init.  */
-  cleanup_cfg (0);
   /* Collect loop information to be used in outer loops pipelining.  */
   loop_optimizer_init (LOOPS_HAVE_PREHEADERS
                        | LOOPS_HAVE_FALLTHRU_PREHEADERS

gcc/sel-sched.c

@@ -28,6 +28,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tm_p.h"
 #include "regs.h"
 #include "cfgbuild.h"
+#include "cfgcleanup.h"
 #include "insn-config.h"
 #include "insn-attr.h"
 #include "params.h"
@@ -7661,6 +7662,10 @@ sel_sched_region (int rgn)
 static void
 sel_global_init (void)
 {
+  /* Remove empty blocks: their presence can break assumptions elsewhere,
+     e.g. the logic to invoke update_liveness_on_insn in sel_region_init.  */
+  cleanup_cfg (0);
+
   calculate_dominance_info (CDI_DOMINATORS);
   alloc_sched_pools ();