From 01a9a412a7d1f9a3d97faa7c10aa619bc351b406 Mon Sep 17 00:00:00 2001
From: David Blaikie <dblaikie@gmail.com>
Date: Tue, 3 Mar 2015 22:25:48 +0000
Subject: [PATCH] Avoid copying LiveInterval, this could lead to a
 double-delete

llvm-svn: 231154
---
 llvm/lib/Target/AArch64/AArch64PBQPRegAlloc.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Target/AArch64/AArch64PBQPRegAlloc.cpp b/llvm/lib/Target/AArch64/AArch64PBQPRegAlloc.cpp
index 4690177..5394875 100644
--- a/llvm/lib/Target/AArch64/AArch64PBQPRegAlloc.cpp
+++ b/llvm/lib/Target/AArch64/AArch64PBQPRegAlloc.cpp
@@ -319,7 +319,7 @@ void A57ChainingConstraint::addInterChainConstraint(PBQPRAGraph &G, unsigned Rd,
 
 static bool regJustKilledBefore(const LiveIntervals &LIs, unsigned reg,
                                 const MachineInstr &MI) {
-  LiveInterval LI = LIs.getInterval(reg);
+  const LiveInterval &LI = LIs.getInterval(reg);
   SlotIndex SI = LIs.getInstructionIndex(&MI);
   return LI.expiredAt(SI);
 }
-- 
2.7.4