Revert "Disallow ArrayRef assignment from temporaries."

This reverts commit r283798, as it causes static asserts on
MSVC 2015 with the following errors:

ArrayRefTest.cpp(38): error C2338: Assigning from single prvalue element
ArrayRefTest.cpp(41): error C2338: Assigning from single xvalue element
ArrayRefTest.cpp(47): error C2338: Assigning from an initializer list

llvm-svn: 283803

1 files changed, 0 insertions, 23 deletions

diff --git a/llvm/unittests/ADT/ArrayRefTest.cpp b/llvm/unittests/ADT/ArrayRefTest.cpp
index f046da8a833..43e5005e62d 100644
--- a/llvm/unittests/ADT/ArrayRefTest.cpp
+++ b/llvm/unittests/ADT/ArrayRefTest.cpp
@@ -31,21 +31,6 @@ static_assert(
     !std::is_convertible<ArrayRef<volatile int *>, ArrayRef<int *>>::value,
     "Removing volatile");
 
-// Check that we can't accidentally assign a temporary location to an ArrayRef.
-// (Unfortunately we can't make use of the same thing with constructors.)
-static_assert(
-    !std::is_assignable<ArrayRef<int *>, int *>::value,
-    "Assigning from single prvalue element");
-static_assert(
-    !std::is_assignable<ArrayRef<int *>, int * &&>::value,
-    "Assigning from single xvalue element");
-static_assert(
-    std::is_assignable<ArrayRef<int *>, int * &>::value,
-    "Assigning from single lvalue element");
-static_assert(
-    !std::is_assignable<ArrayRef<int *>, std::initializer_list<int *>>::value,
-    "Assigning from an initializer list");
-
 namespace {
 
 TEST(ArrayRefTest, AllocatorCopy) {
@@ -176,14 +161,6 @@ TEST(ArrayRefTest, InitializerList) {
   ArgTest12({1, 2});
 }
 
-TEST(ArrayRefTest, EmptyInitializerList) {
-  ArrayRef<int> A = {};
-  EXPECT_TRUE(A.empty());
-
-  A = {};
-  EXPECT_TRUE(A.empty());
-}
-
 // Test that makeArrayRef works on ArrayRef (no-op)
 TEST(ArrayRefTest, makeArrayRef) {
   static const int A1[] = {1, 2, 3, 4, 5, 6, 7, 8};