From b9e9c559111b72c3141b7bfdd6abb381aebe4ffc Mon Sep 17 00:00:00 2001
From: Manman Ren <mren@apple.com>
Date: Tue, 31 Jul 2012 20:45:38 +0000
Subject: [PATCH] MachineSink: Sort the successors before trying to find
 SuccToSinkTo.

Use stable_sort instead of sort. Follow-up to r161062.

rdar://11980766

llvm-svn: 161075
---
 lib/CodeGen/MachineSink.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp
index d02aa6fe601..bc383cba455 100644
--- a/lib/CodeGen/MachineSink.cpp
+++ b/lib/CodeGen/MachineSink.cpp
@@ -538,7 +538,7 @@ MachineBasicBlock *MachineSinking::FindSuccToSinkTo(MachineInstr *MI,
       // we should sink to.
       // We give successors with smaller loop depth higher priority.
       SmallVector<MachineBasicBlock*, 4> Succs(MBB->succ_begin(), MBB->succ_end());
-      std::sort(Succs.begin(), Succs.end(), SuccessorSorter(LI));
+      std::stable_sort(Succs.begin(), Succs.end(), SuccessorSorter(LI));
       for (SmallVector<MachineBasicBlock*, 4>::iterator SI = Succs.begin(),
            E = Succs.end(); SI != E; ++SI) {
         MachineBasicBlock *SuccBlock = *SI;