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1 //===- llvm/unittest/ADT/PointerEmbeddedIntTest.cpp -----------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "gtest/gtest.h"
11 #include "llvm/ADT/PointerEmbeddedInt.h"
12 using namespace llvm;
13 
14 namespace {
15 
TEST(PointerEmbeddedIntTest,Basic)16 TEST(PointerEmbeddedIntTest, Basic) {
17   PointerEmbeddedInt<int, CHAR_BIT> I = 42, J = 43;
18 
19   EXPECT_EQ(42, I);
20   EXPECT_EQ(43, I + 1);
21   EXPECT_EQ(sizeof(uintptr_t) * CHAR_BIT - CHAR_BIT,
22             PointerLikeTypeTraits<decltype(I)>::NumLowBitsAvailable);
23 
24   EXPECT_FALSE(I == J);
25   EXPECT_TRUE(I != J);
26   EXPECT_TRUE(I < J);
27   EXPECT_FALSE(I > J);
28   EXPECT_TRUE(I <= J);
29   EXPECT_FALSE(I >= J);
30 
31   EXPECT_FALSE(I == 43);
32   EXPECT_TRUE(I != 43);
33   EXPECT_TRUE(I < 43);
34   EXPECT_FALSE(I > 43);
35   EXPECT_TRUE(I <= 43);
36   EXPECT_FALSE(I >= 43);
37 
38   EXPECT_FALSE(42 == J);
39   EXPECT_TRUE(42 != J);
40   EXPECT_TRUE(42 < J);
41   EXPECT_FALSE(42 > J);
42   EXPECT_TRUE(42 <= J);
43   EXPECT_FALSE(42 >= J);
44 }
45 
TEST(PointerEmbeddedIntTest,intptr_t)46 TEST(PointerEmbeddedIntTest, intptr_t) {
47   PointerEmbeddedInt<intptr_t, CHAR_BIT> IPos = 42, INeg = -42;
48   EXPECT_EQ(42, IPos);
49   EXPECT_EQ(-42, INeg);
50 
51   PointerEmbeddedInt<uintptr_t, CHAR_BIT> U = 42, USaturated = 255;
52   EXPECT_EQ(42U, U);
53   EXPECT_EQ(255U, USaturated);
54 
55   PointerEmbeddedInt<intptr_t, std::numeric_limits<intptr_t>::digits>
56       IMax = std::numeric_limits<intptr_t>::max() >> 1,
57       IMin = std::numeric_limits<intptr_t>::min() >> 1;
58   EXPECT_EQ(std::numeric_limits<intptr_t>::max() >> 1, IMax);
59   EXPECT_EQ(std::numeric_limits<intptr_t>::min() >> 1, IMin);
60 
61   PointerEmbeddedInt<uintptr_t, std::numeric_limits<uintptr_t>::digits - 1>
62       UMax = std::numeric_limits<uintptr_t>::max() >> 1,
63       UMin = std::numeric_limits<uintptr_t>::min() >> 1;
64   EXPECT_EQ(std::numeric_limits<uintptr_t>::max() >> 1, UMax);
65   EXPECT_EQ(std::numeric_limits<uintptr_t>::min() >> 1, UMin);
66 }
67 
TEST(PointerEmbeddedIntTest,PointerLikeTypeTraits)68 TEST(PointerEmbeddedIntTest, PointerLikeTypeTraits) {
69   PointerEmbeddedInt<int, CHAR_BIT> I = 42;
70   using ITraits = PointerLikeTypeTraits<decltype(I)>;
71   EXPECT_EQ(42, ITraits::getFromVoidPointer(ITraits::getAsVoidPointer(I)));
72 
73   PointerEmbeddedInt<uintptr_t, std::numeric_limits<uintptr_t>::digits - 1>
74       Max = std::numeric_limits<uintptr_t>::max() >> 1;
75   using MaxTraits = PointerLikeTypeTraits<decltype(Max)>;
76   EXPECT_EQ(std::numeric_limits<uintptr_t>::max() >> 1,
77             MaxTraits::getFromVoidPointer(MaxTraits::getAsVoidPointer(Max)));
78 }
79 
80 } // end anonymous namespace
81