// objects.
struct LargeTestInteger { uint64_t arr[8]; };
+struct NonPOD {
+ uint64_t x, y;
+ NonPOD(uint64_t x, uint64_t y) : x(x), y(y) {}
+ 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
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));
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)));
+ EXPECT_NE(hash_combine(42, 43), hash_value(std::make_pair(42, 43ull)));
+ EXPECT_NE(hash_combine(42, 43), hash_value(std::make_pair(42ull, 43)));
+
+ // Note that pairs are implicitly flattened to a direct sequence of data and
+ // hashed efficiently as a consequence.
+ EXPECT_EQ(hash_combine(42, 43, 44),
+ 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; }
template <typename T, size_t N> T *end(T (&arr)[N]) { return arr + N; }
{ "abababab", 0xee14a29ddf0ce54cULL },
{ "ababababababa", 0x38b3ddaada2d52b4ULL },
{ "ababababababababababa", 0xd3665364219f2b85ULL },
+ { "abababababababababababababababab", 0xa75cd6afbf1bc972ULL },
{ "abababababababababababababababab"
"abababababababababababababababab"
"abababababababababababababababab"
"abababababababababababababababab"
"abababababababababababababababab", 0x840192d129f7a22bULL }
#elif SIZE_MAX == UINT32_MAX
- { "a", 0x000000004605f745ULL },
- { "ab", 0x00000000d5f06301ULL },
- { "abc", 0x00000000559fe1eeULL },
- { "abcde", 0x00000000424028d7ULL },
- { "abcdefgh", 0x000000007bb119f8ULL },
- { "abcdefghijklm", 0x00000000edbca513ULL },
- { "abcdefghijklmnopqrstu", 0x000000007c15712eULL },
- { "abcdefghijklmnopqrstuvwxyzabcdef", 0x000000000b3aad66ULL },
- { "abcdefghijklmnopqrstuvwxyzabcdef"
- "abcdefghijklmnopqrstuvwxyzghijkl"
- "abcdefghijklmnopqrstuvwxyzmnopqr"
- "abcdefghijklmnopqrstuvwxyzstuvwx"
- "abcdefghijklmnopqrstuvwxyzyzabcd", 0x000000008c758c8bULL },
- { "a", 0x000000004605f745ULL },
- { "aa", 0x00000000dc0a52daULL },
- { "aaa", 0x00000000b309274fULL },
- { "aaaaa", 0x00000000203b5ef6ULL },
- { "aaaaaaaa", 0x00000000a429e18fULL },
- { "aaaaaaaaaaaaa", 0x000000008662070bULL },
- { "aaaaaaaaaaaaaaaaaaaaa", 0x000000003f11151cULL },
- { "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 0x000000008600fe20ULL },
- { "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
- "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
- "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
- "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
- "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 0x000000004e0e0804ULL },
- { "z", 0x00000000c5e405e9ULL },
- { "zz", 0x00000000a8d8a2c6ULL },
- { "zzz", 0x00000000fc2af672ULL },
- { "zzzzz", 0x0000000047d9efe6ULL },
- { "zzzzzzzz", 0x0000000080d77794ULL },
- { "zzzzzzzzzzzzz", 0x00000000405f93adULL },
- { "zzzzzzzzzzzzzzzzzzzzz", 0x00000000fc72838dULL },
- { "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz", 0x000000007ce160f1ULL },
- { "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
- "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
- "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
- "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
- "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz", 0x00000000aed9ed1bULL },
- { "a", 0x000000004605f745ULL },
- { "ab", 0x00000000d5f06301ULL },
- { "aba", 0x00000000a85cd91bULL },
- { "ababa", 0x000000009e3bb52eULL },
- { "abababab", 0x000000002709b3b9ULL },
- { "ababababababa", 0x000000003a234174ULL },
- { "ababababababababababa", 0x000000005c63e5ceULL },
- { "abababababababababababababababab", 0x0000000013f74334ULL },
- { "abababababababababababababababab"
- "abababababababababababababababab"
- "abababababababababababababababab"
- "abababababababababababababababab"
- "abababababababababababababababab", 0x00000000c1a6f135ULL },
+ { "a", 0x000000004605f745ULL },
+ { "ab", 0x00000000d5f06301ULL },
+ { "abc", 0x00000000559fe1eeULL },
+ { "abcde", 0x00000000424028d7ULL },
+ { "abcdefgh", 0x000000007bb119f8ULL },
+ { "abcdefghijklm", 0x00000000edbca513ULL },
+ { "abcdefghijklmnopqrstu", 0x000000007c15712eULL },
+ { "abcdefghijklmnopqrstuvwxyzabcdef", 0x000000000b3aad66ULL },
+ { "abcdefghijklmnopqrstuvwxyzabcdef"
+ "abcdefghijklmnopqrstuvwxyzghijkl"
+ "abcdefghijklmnopqrstuvwxyzmnopqr"
+ "abcdefghijklmnopqrstuvwxyzstuvwx"
+ "abcdefghijklmnopqrstuvwxyzyzabcd", 0x000000008c758c8bULL },
+ { "a", 0x000000004605f745ULL },
+ { "aa", 0x00000000dc0a52daULL },
+ { "aaa", 0x00000000b309274fULL },
+ { "aaaaa", 0x00000000203b5ef6ULL },
+ { "aaaaaaaa", 0x00000000a429e18fULL },
+ { "aaaaaaaaaaaaa", 0x000000008662070bULL },
+ { "aaaaaaaaaaaaaaaaaaaaa", 0x000000003f11151cULL },
+ { "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 0x000000008600fe20ULL },
+ { "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 0x000000004e0e0804ULL },
+ { "z", 0x00000000c5e405e9ULL },
+ { "zz", 0x00000000a8d8a2c6ULL },
+ { "zzz", 0x00000000fc2af672ULL },
+ { "zzzzz", 0x0000000047d9efe6ULL },
+ { "zzzzzzzz", 0x0000000080d77794ULL },
+ { "zzzzzzzzzzzzz", 0x00000000405f93adULL },
+ { "zzzzzzzzzzzzzzzzzzzzz", 0x00000000fc72838dULL },
+ { "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz", 0x000000007ce160f1ULL },
+ { "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
+ "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
+ "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
+ "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"
+ "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz", 0x00000000aed9ed1bULL },
+ { "a", 0x000000004605f745ULL },
+ { "ab", 0x00000000d5f06301ULL },
+ { "aba", 0x00000000a85cd91bULL },
+ { "ababa", 0x000000009e3bb52eULL },
+ { "abababab", 0x000000002709b3b9ULL },
+ { "ababababababa", 0x000000003a234174ULL },
+ { "ababababababababababa", 0x000000005c63e5ceULL },
+ { "abababababababababababababababab", 0x0000000013f74334ULL },
+ { "abababababababababababababababab"
+ "abababababababababababababababab"
+ "abababababababababababababababab"
+ "abababababababababababababababab"
+ "abababababababababababababababab", 0x00000000c1a6f135ULL },
#else
#error This test only supports 64-bit and 32-bit systems.
#endif
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;
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
+}
+
}
projects / oota-llvm.git / blobdiff