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