Adding additional tests to ensure that initializer lists created from return values...

[oota-llvm.git] / unittests / ADT / HashingTest.cpp

diff --git a/unittests/ADT/HashingTest.cpp b/unittests/ADT/HashingTest.cpp
index 008ff496c801908db567d0ee7841684efaf1631e..34eb5a52eb8a0fa11f3748480cff088509581b15 100644 (file)
--- a/unittests/ADT/HashingTest.cpp
+++ b/unittests/ADT/HashingTest.cpp
@@ -30,9 +30,18 @@ void PrintTo(const hash_code &code, std::ostream *os) {
 // objects.
 struct LargeTestInteger { uint64_t arr[8]; };
 
+struct NonPOD {
+  uint64_t x, y;
+  NonPOD(uint64_t x, uint64_t y) : x(x), y(y) {}
+  ~NonPOD() {}
+  friend hash_code hash_value(const NonPOD &obj) {
+    return hash_combine(obj.x, obj.y);
+  }
+};
+
 namespace hashing {
 namespace detail {
-template <> struct is_hashable_data<LargeTestInteger> : true_type {};
+template <> struct is_hashable_data<LargeTestInteger> : std::true_type {};
 } // namespace detail
 } // namespace hashing
 
@@ -42,16 +51,23 @@ using namespace llvm;
 
 namespace {
 
+enum TestEnumeration {
+  TE_Foo = 42,
+  TE_Bar = 43
+};
+
 TEST(HashingTest, HashValueBasicTest) {
   int x = 42, y = 43, c = 'x';
-  void *p = 0;
+  void *p = nullptr;
   uint64_t i = 71;
   const unsigned ci = 71;
   volatile int vi = 71;
   const volatile int cvi = 71;
   uintptr_t addr = reinterpret_cast<uintptr_t>(&y);
   EXPECT_EQ(hash_value(42), hash_value(x));
+  EXPECT_EQ(hash_value(42), hash_value(TE_Foo));
   EXPECT_NE(hash_value(42), hash_value(y));
+  EXPECT_NE(hash_value(42), hash_value(TE_Bar));
   EXPECT_NE(hash_value(42), hash_value(p));
   EXPECT_EQ(hash_value(71), hash_value(i));
   EXPECT_EQ(hash_value(71), hash_value(ci));
@@ -60,7 +76,9 @@ TEST(HashingTest, HashValueBasicTest) {
   EXPECT_EQ(hash_value(c), hash_value('x'));
   EXPECT_EQ(hash_value('4'), hash_value('0' + 4));
   EXPECT_EQ(hash_value(addr), hash_value(&y));
+}
 
+TEST(HashingTest, HashValueStdPair) {
   EXPECT_EQ(hash_combine(42, 43), hash_value(std::make_pair(42, 43)));
   EXPECT_NE(hash_combine(43, 42), hash_value(std::make_pair(42, 43)));
   EXPECT_NE(hash_combine(42, 43), hash_value(std::make_pair(42ull, 43ull)));
@@ -73,6 +91,33 @@ TEST(HashingTest, HashValueBasicTest) {
             hash_value(std::make_pair(42, std::make_pair(43, 44))));
   EXPECT_EQ(hash_value(std::make_pair(42, std::make_pair(43, 44))),
             hash_value(std::make_pair(std::make_pair(42, 43), 44)));
+
+  // Ensure that pairs which have padding bytes *inside* them don't get treated
+  // this way.
+  EXPECT_EQ(hash_combine('0', hash_combine(1ull, '2')),
+            hash_value(std::make_pair('0', std::make_pair(1ull, '2'))));
+
+  // Ensure that non-POD pairs don't explode the traits used.
+  NonPOD obj1(1, 2), obj2(3, 4), obj3(5, 6);
+  EXPECT_EQ(hash_combine(obj1, hash_combine(obj2, obj3)),
+            hash_value(std::make_pair(obj1, std::make_pair(obj2, obj3))));
+}
+
+TEST(HashingTest, HashValueStdString) {
+  std::string s = "Hello World!";
+  EXPECT_EQ(hash_combine_range(s.c_str(), s.c_str() + s.size()), hash_value(s));
+  EXPECT_EQ(hash_combine_range(s.c_str(), s.c_str() + s.size() - 1),
+            hash_value(s.substr(0, s.size() - 1)));
+  EXPECT_EQ(hash_combine_range(s.c_str() + 1, s.c_str() + s.size() - 1),
+            hash_value(s.substr(1, s.size() - 2)));
+
+  std::wstring ws = L"Hello Wide World!";
+  EXPECT_EQ(hash_combine_range(ws.c_str(), ws.c_str() + ws.size()),
+            hash_value(ws));
+  EXPECT_EQ(hash_combine_range(ws.c_str(), ws.c_str() + ws.size() - 1),
+            hash_value(ws.substr(0, ws.size() - 1)));
+  EXPECT_EQ(hash_combine_range(ws.c_str() + 1, ws.c_str() + ws.size() - 1),
+            hash_value(ws.substr(1, ws.size() - 2)));
 }
 
 template <typename T, size_t N> T *begin(T (&arr)[N]) { return arr; }
@@ -211,6 +256,7 @@ TEST(HashingTest, HashCombineRangeGoldenTest) {
     { "abababab",                         0xee14a29ddf0ce54cULL },
     { "ababababababa",                    0x38b3ddaada2d52b4ULL },
     { "ababababababababababa",            0xd3665364219f2b85ULL },
+    { "abababababababababababababababab", 0xa75cd6afbf1bc972ULL },
     { "abababababababababababababababab"
       "abababababababababababababababab"
       "abababababababababababababababab"
@@ -299,7 +345,7 @@ TEST(HashingTest, HashCombineBasicTest) {
   EXPECT_EQ(hash_combine_range(arr1, arr1 + 6),
             hash_combine(i1, i2, i3, i4, i5, i6));
 
-  // Hashing a sequence of heterogenous types which *happen* to all produce the
+  // Hashing a sequence of heterogeneous types which *happen* to all produce the
   // same data for hashing produces the same as a range-based hash of the
   // fundamental values.
   const size_t s1 = 1024, s2 = 8888, s3 = 9000000;
@@ -375,4 +421,29 @@ TEST(HashingTest, HashCombineBasicTest) {
             hash_combine(bigarr[0], l2, bigarr[9], l3, bigarr[18], bigarr[19]));
 }
 
+TEST(HashingTest, HashCombineArgs18) {
+  // This tests that we can pass in up to 18 args.
+#define CHECK_SAME(...)                                                        \
+  EXPECT_EQ(hash_combine(__VA_ARGS__), hash_combine(__VA_ARGS__))
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8, 9);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7, 8);
+  CHECK_SAME(1, 2, 3, 4, 5, 6, 7);
+  CHECK_SAME(1, 2, 3, 4, 5, 6);
+  CHECK_SAME(1, 2, 3, 4, 5);
+  CHECK_SAME(1, 2, 3, 4);
+  CHECK_SAME(1, 2, 3);
+  CHECK_SAME(1, 2);
+  CHECK_SAME(1);
+#undef CHECK_SAME
+}
+
 }