re PR rtl-optimization/54369 (delayed-branch pass removes too many instructions)

	PR rtl-optimization/54369
	* config/mips/mips.c (mips_reorg): Invoke cleanup_barriers before
	calling dbr_schedule.
	* config/sparc/sparc.c (sparc_reorg): Likewise.

From-SVN: r190858

gcc/ChangeLog

+2012-09-02  Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR rtl-optimization/54369
+	* config/mips/mips.c (mips_reorg): Invoke cleanup_barriers before
+	calling dbr_schedule.
+	* config/sparc/sparc.c (sparc_reorg): Likewise.
+
 2012-09-01  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/54436

gcc/config/mips/mips.c

@@ -15729,7 +15729,10 @@ mips_reorg (void)
     }
 
   if (optimize > 0 && flag_delayed_branch)
-    dbr_schedule (get_insns ());
+    {
+      cleanup_barriers ();
+      dbr_schedule (get_insns ());
+    }
   mips_reorg_process_insns ();
   if (!TARGET_MIPS16
       && TARGET_EXPLICIT_RELOCS

gcc/config/sparc/sparc.c

@@ -10691,7 +10691,10 @@ sparc_reorg (void)
   /* We need to have the (essentially) final form of the insn stream in order
      to properly detect the various hazards.  Run delay slot scheduling.  */
   if (optimize > 0 && flag_delayed_branch)
-    dbr_schedule (get_insns ());
+    {
+      cleanup_barriers ();
+      dbr_schedule (get_insns ());
+    }
 
   /* Now look for specific patterns in the insn stream.  */
   for (insn = get_insns (); insn; insn = next)