Fixes to make LLVM compile with vc7.1.

Patch contributed by Paolo Invernizzi!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16152 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LoadValueNumbering.cpp b/lib/Analysis/LoadValueNumbering.cpp
index f4a7a97..a8c9d5f 100644
--- a/lib/Analysis/LoadValueNumbering.cpp
+++ b/lib/Analysis/LoadValueNumbering.cpp
@@ -33,6 +33,7 @@
 #include "llvm/Support/CFG.h"
 #include "llvm/Target/TargetData.h"
 #include <set>
+#include <algorithm>
 using namespace llvm;
 
 namespace {