From: David Blaikie <dblaikie@gmail.com>
Date: Tue, 3 Mar 2015 22:25:48 +0000 (+0000)
Subject: Avoid copying LiveInterval, this could lead to a double-delete
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5f4b9f892bf87aa2fbc49f63799b3b69ced1a33c;p=oota-llvm.git

Avoid copying LiveInterval, this could lead to a double-delete

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231154 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/AArch64/AArch64PBQPRegAlloc.cpp b/lib/Target/AArch64/AArch64PBQPRegAlloc.cpp
index 4690177d029..5394875a6bc 100644
--- a/lib/Target/AArch64/AArch64PBQPRegAlloc.cpp
+++ b/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);
 }