From 9ccaf3f7c56c9f3e7e3359165f387895a1cd5ffa Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Wed, 16 Sep 2009 11:43:12 +0000
Subject: Don't sort the vector when it is empty. This should fix some
 expensive checking failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82040 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineModuleInfoImpls.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/CodeGen/MachineModuleInfoImpls.cpp')

diff --git a/lib/CodeGen/MachineModuleInfoImpls.cpp b/lib/CodeGen/MachineModuleInfoImpls.cpp
index 10de1de..7a62929 100644
--- a/lib/CodeGen/MachineModuleInfoImpls.cpp
+++ b/lib/CodeGen/MachineModuleInfoImpls.cpp
@@ -38,7 +38,8 @@ MachineModuleInfoMachO::SymbolListTy
 MachineModuleInfoMachO::GetSortedStubs(const DenseMap<const MCSymbol*, 
                                                       const MCSymbol*> &Map) {
   MachineModuleInfoMachO::SymbolListTy List(Map.begin(), Map.end());
-  qsort(&List[0], List.size(), sizeof(List[0]), SortSymbolPair);
+  if (!List.empty())
+    qsort(&List[0], List.size(), sizeof(List[0]), SortSymbolPair);
   return List;
 }
 
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