From 01496707301d09bfb32d03e7cbabef0d7ee032d7 Mon Sep 17 00:00:00 2001
From: Alexander Monakov <amonakov@ispras.ru>
Date: Thu, 12 Apr 2018 18:40:44 +0300
Subject: 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/sel-sched.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'gcc/sel-sched.c')

diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c
index cd29df3..5976296 100644
--- a/gcc/sel-sched.c
+++ b/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 ();
 
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