1 | //===- llvm/unittest/ADT/PointerEmbeddedIntTest.cpp -----------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "llvm/ADT/PointerEmbeddedInt.h" |
10 | #include "gtest/gtest.h" |
11 | using namespace llvm; |
12 | |
13 | namespace { |
14 | |
15 | TEST(PointerEmbeddedIntTest, Basic) { |
16 | PointerEmbeddedInt<int, CHAR_BIT> I = 42, J = 43; |
17 | |
18 | EXPECT_EQ(42, I); |
19 | EXPECT_EQ(43, I + 1); |
20 | EXPECT_EQ((int)sizeof(uintptr_t) * CHAR_BIT - CHAR_BIT, |
21 | (int)PointerLikeTypeTraits<decltype(I)>::NumLowBitsAvailable); |
22 | |
23 | EXPECT_FALSE(I == J); |
24 | EXPECT_TRUE(I != J); |
25 | EXPECT_TRUE(I < J); |
26 | EXPECT_FALSE(I > J); |
27 | EXPECT_TRUE(I <= J); |
28 | EXPECT_FALSE(I >= J); |
29 | |
30 | EXPECT_FALSE(I == 43); |
31 | EXPECT_TRUE(I != 43); |
32 | EXPECT_TRUE(I < 43); |
33 | EXPECT_FALSE(I > 43); |
34 | EXPECT_TRUE(I <= 43); |
35 | EXPECT_FALSE(I >= 43); |
36 | |
37 | EXPECT_FALSE(42 == J); |
38 | EXPECT_TRUE(42 != J); |
39 | EXPECT_TRUE(42 < J); |
40 | EXPECT_FALSE(42 > J); |
41 | EXPECT_TRUE(42 <= J); |
42 | EXPECT_FALSE(42 >= J); |
43 | } |
44 | |
45 | TEST(PointerEmbeddedIntTest, intptr_t) { |
46 | PointerEmbeddedInt<intptr_t, CHAR_BIT> IPos = 42, INeg = -42; |
47 | EXPECT_EQ(42, IPos); |
48 | EXPECT_EQ(-42, INeg); |
49 | |
50 | PointerEmbeddedInt<uintptr_t, CHAR_BIT> U = 42, USaturated = 255; |
51 | EXPECT_EQ(42U, U); |
52 | EXPECT_EQ(255U, USaturated); |
53 | |
54 | PointerEmbeddedInt<intptr_t, std::numeric_limits<intptr_t>::digits> |
55 | IMax = std::numeric_limits<intptr_t>::max() >> 1, |
56 | IMin = std::numeric_limits<intptr_t>::min() >> 1; |
57 | EXPECT_EQ(std::numeric_limits<intptr_t>::max() >> 1, IMax); |
58 | EXPECT_EQ(std::numeric_limits<intptr_t>::min() >> 1, IMin); |
59 | |
60 | PointerEmbeddedInt<uintptr_t, std::numeric_limits<uintptr_t>::digits - 1> |
61 | UMax = std::numeric_limits<uintptr_t>::max() >> 1, |
62 | UMin = std::numeric_limits<uintptr_t>::min() >> 1; |
63 | EXPECT_EQ(std::numeric_limits<uintptr_t>::max() >> 1, UMax); |
64 | EXPECT_EQ(std::numeric_limits<uintptr_t>::min() >> 1, UMin); |
65 | } |
66 | |
67 | TEST(PointerEmbeddedIntTest, PointerLikeTypeTraits) { |
68 | PointerEmbeddedInt<int, CHAR_BIT> I = 42; |
69 | using ITraits = PointerLikeTypeTraits<decltype(I)>; |
70 | EXPECT_EQ(42, ITraits::getFromVoidPointer(ITraits::getAsVoidPointer(I))); |
71 | |
72 | PointerEmbeddedInt<uintptr_t, std::numeric_limits<uintptr_t>::digits - 1> |
73 | Max = std::numeric_limits<uintptr_t>::max() >> 1; |
74 | using MaxTraits = PointerLikeTypeTraits<decltype(Max)>; |
75 | EXPECT_EQ(std::numeric_limits<uintptr_t>::max() >> 1, |
76 | MaxTraits::getFromVoidPointer(MaxTraits::getAsVoidPointer(Max))); |
77 | } |
78 | |
79 | } // end anonymous namespace |
80 | |