From: Wei Mi <wmi@google.com>
Date: Mon, 4 Nov 2013 21:45:05 +0000 (+0000)
Subject: sched-rgn.c (add_branch_dependences): Keep insns in a SCHED_GROUP at the end of BB... 
X-Git-Tag: releases/gcc-4.9.0~3046
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a22449bd7ddb0b63d0bc5af14a4a9ae272eb8fd8;p=thirdparty%2Fgcc.git

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
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 895da5a9bd96..4d08af451980 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+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
diff --git a/gcc/sched-rgn.c b/gcc/sched-rgn.c
index bf9b10df3a99..73a236b5929a 100644
--- a/gcc/sched-rgn.c
+++ b/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))
 	{