sched-rgn.c (add_branch_dependences): Keep insns in a SCHED_GROUP at the end of…

sched-rgn.c (add_branch_dependences): Keep insns in a SCHED_GROUP at the end of BB to remain their location.

2013-11-04  Wei Mi  <wmi@google.com>

        * sched-rgn.c (add_branch_dependences): Keep insns in
        a SCHED_GROUP at the end of BB to remain their location.

From-SVN: r204371

gcc/ChangeLog

 2013-11-04  Wei Mi  <wmi@google.com>
 
+	* sched-rgn.c (add_branch_dependences): Keep insns in
+	a SCHED_GROUP at the end of BB to remain their location.
+
+2013-11-04  Wei Mi  <wmi@google.com>
+
 	* gcc/config/i386/i386.c (memory_address_length): Extract a part
 	of code to rip_relative_addr_p.
 	(rip_relative_addr_p): New Function.

gcc/sched-rgn.c

@@ -2443,6 +2443,8 @@ add_branch_dependences (rtx head, rtx tail)
      cc0 setters remain at the end because they can't be moved away from
      their cc0 user.
 
+     Predecessors of SCHED_GROUP_P instructions at the end remain at the end.
+
      COND_EXEC insns cannot be moved past a branch (see e.g. PR17808).
 
      Insns setting TARGET_CLASS_LIKELY_SPILLED_P registers (usually return
@@ -2465,7 +2467,8 @@ add_branch_dependences (rtx head, rtx tail)
 #endif
 		 || (!reload_completed
 		     && sets_likely_spilled (PATTERN (insn)))))
-	 || NOTE_P (insn))
+	 || NOTE_P (insn)
+	 || (last != 0 && SCHED_GROUP_P (last)))
     {
       if (!NOTE_P (insn))
 	{