Fix SmallVector's insert to handle non-random-access iterators.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99633 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/ADT/SmallVectorTest.cpp

@@ -14,6 +14,7 @@
 #include "gtest/gtest.h"
 #include "llvm/ADT/SmallVector.h"
 #include <stdarg.h>
+#include <list>
 
 using namespace llvm;
 
@@ -399,4 +400,9 @@ TEST_F(SmallVectorTest, DirectVectorTest) {
   EXPECT_EQ(4, theVector[3].getValue());
 }
 
+TEST_F(SmallVectorTest, IteratorTest) {
+  std::list<int> L;
+  theVector.insert(theVector.end(), L.begin(), L.end());
+}
+
 }