1 //===- llvm/unittest/ADT/ArrayRefTest.cpp - ArrayRef unit tests -----------===// 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 "llvm/ADT/ArrayRef.h" 11 #include "llvm/Support/Allocator.h" 12 #include "llvm/Support/raw_ostream.h" 13 #include "gtest/gtest.h" 14 #include <vector> 15 using namespace llvm; 16 17 // Check that the ArrayRef-of-pointer converting constructor only allows adding 18 // cv qualifiers (not removing them, or otherwise changing the type) 19 static_assert( 20 std::is_convertible<ArrayRef<int *>, ArrayRef<const int *>>::value, 21 "Adding const"); 22 static_assert( 23 std::is_convertible<ArrayRef<int *>, ArrayRef<volatile int *>>::value, 24 "Adding volatile"); 25 static_assert(!std::is_convertible<ArrayRef<int *>, ArrayRef<float *>>::value, 26 "Changing pointer of one type to a pointer of another"); 27 static_assert( 28 !std::is_convertible<ArrayRef<const int *>, ArrayRef<int *>>::value, 29 "Removing const"); 30 static_assert( 31 !std::is_convertible<ArrayRef<volatile int *>, ArrayRef<int *>>::value, 32 "Removing volatile"); 33 34 namespace { 35 36 TEST(ArrayRefTest, AllocatorCopy) { 37 BumpPtrAllocator Alloc; 38 static const uint16_t Words1[] = { 1, 4, 200, 37 }; 39 ArrayRef<uint16_t> Array1 = makeArrayRef(Words1, 4); 40 static const uint16_t Words2[] = { 11, 4003, 67, 64000, 13 }; 41 ArrayRef<uint16_t> Array2 = makeArrayRef(Words2, 5); 42 ArrayRef<uint16_t> Array1c = Array1.copy(Alloc); 43 ArrayRef<uint16_t> Array2c = Array2.copy(Alloc); 44 EXPECT_TRUE(Array1.equals(Array1c)); 45 EXPECT_NE(Array1.data(), Array1c.data()); 46 EXPECT_TRUE(Array2.equals(Array2c)); 47 EXPECT_NE(Array2.data(), Array2c.data()); 48 49 // Check that copy can cope with uninitialized memory. 50 struct NonAssignable { 51 const char *Ptr; 52 53 NonAssignable(const char *Ptr) : Ptr(Ptr) {} 54 NonAssignable(const NonAssignable &RHS) = default; 55 void operator=(const NonAssignable &RHS) { assert(RHS.Ptr != nullptr); } 56 bool operator==(const NonAssignable &RHS) const { return Ptr == RHS.Ptr; } 57 } Array3Src[] = {"hello", "world"}; 58 ArrayRef<NonAssignable> Array3Copy = makeArrayRef(Array3Src).copy(Alloc); 59 EXPECT_EQ(makeArrayRef(Array3Src), Array3Copy); 60 EXPECT_NE(makeArrayRef(Array3Src).data(), Array3Copy.data()); 61 } 62 63 TEST(ArrayRefTest, DropBack) { 64 static const int TheNumbers[] = {4, 8, 15, 16, 23, 42}; 65 ArrayRef<int> AR1(TheNumbers); 66 ArrayRef<int> AR2(TheNumbers, AR1.size() - 1); 67 EXPECT_TRUE(AR1.drop_back().equals(AR2)); 68 } 69 70 TEST(ArrayRefTest, DropFront) { 71 static const int TheNumbers[] = {4, 8, 15, 16, 23, 42}; 72 ArrayRef<int> AR1(TheNumbers); 73 ArrayRef<int> AR2(&TheNumbers[2], AR1.size() - 2); 74 EXPECT_TRUE(AR1.drop_front(2).equals(AR2)); 75 } 76 77 TEST(ArrayRefTest, Equals) { 78 static const int A1[] = {1, 2, 3, 4, 5, 6, 7, 8}; 79 ArrayRef<int> AR1(A1); 80 EXPECT_TRUE(AR1.equals({1, 2, 3, 4, 5, 6, 7, 8})); 81 EXPECT_FALSE(AR1.equals({8, 1, 2, 4, 5, 6, 6, 7})); 82 EXPECT_FALSE(AR1.equals({2, 4, 5, 6, 6, 7, 8, 1})); 83 EXPECT_FALSE(AR1.equals({0, 1, 2, 4, 5, 6, 6, 7})); 84 EXPECT_FALSE(AR1.equals({1, 2, 42, 4, 5, 6, 7, 8})); 85 EXPECT_FALSE(AR1.equals({42, 2, 3, 4, 5, 6, 7, 8})); 86 EXPECT_FALSE(AR1.equals({1, 2, 3, 4, 5, 6, 7, 42})); 87 EXPECT_FALSE(AR1.equals({1, 2, 3, 4, 5, 6, 7})); 88 EXPECT_FALSE(AR1.equals({1, 2, 3, 4, 5, 6, 7, 8, 9})); 89 90 ArrayRef<int> AR1a = AR1.drop_back(); 91 EXPECT_TRUE(AR1a.equals({1, 2, 3, 4, 5, 6, 7})); 92 EXPECT_FALSE(AR1a.equals({1, 2, 3, 4, 5, 6, 7, 8})); 93 94 ArrayRef<int> AR1b = AR1a.slice(2, 4); 95 EXPECT_TRUE(AR1b.equals({3, 4, 5, 6})); 96 EXPECT_FALSE(AR1b.equals({2, 3, 4, 5, 6})); 97 EXPECT_FALSE(AR1b.equals({3, 4, 5, 6, 7})); 98 } 99 100 TEST(ArrayRefTest, EmptyEquals) { 101 EXPECT_TRUE(ArrayRef<unsigned>() == ArrayRef<unsigned>()); 102 } 103 104 TEST(ArrayRefTest, ConstConvert) { 105 int buf[4]; 106 for (int i = 0; i < 4; ++i) 107 buf[i] = i; 108 109 static int *A[] = {&buf[0], &buf[1], &buf[2], &buf[3]}; 110 ArrayRef<const int *> a((ArrayRef<int *>(A))); 111 a = ArrayRef<int *>(A); 112 } 113 114 static std::vector<int> ReturnTest12() { return {1, 2}; } 115 static void ArgTest12(ArrayRef<int> A) { 116 EXPECT_EQ(2U, A.size()); 117 EXPECT_EQ(1, A[0]); 118 EXPECT_EQ(2, A[1]); 119 } 120 121 TEST(ArrayRefTest, InitializerList) { 122 ArrayRef<int> A = { 0, 1, 2, 3, 4 }; 123 for (int i = 0; i < 5; ++i) 124 EXPECT_EQ(i, A[i]); 125 126 std::vector<int> B = ReturnTest12(); 127 A = B; 128 EXPECT_EQ(1, A[0]); 129 EXPECT_EQ(2, A[1]); 130 131 ArgTest12({1, 2}); 132 } 133 134 // Test that makeArrayRef works on ArrayRef (no-op) 135 TEST(ArrayRefTest, makeArrayRef) { 136 static const int A1[] = {1, 2, 3, 4, 5, 6, 7, 8}; 137 138 // No copy expected for non-const ArrayRef (true no-op) 139 ArrayRef<int> AR1(A1); 140 ArrayRef<int> &AR1Ref = makeArrayRef(AR1); 141 EXPECT_EQ(&AR1, &AR1Ref); 142 143 // A copy is expected for non-const ArrayRef (thin copy) 144 const ArrayRef<int> AR2(A1); 145 const ArrayRef<int> &AR2Ref = makeArrayRef(AR2); 146 EXPECT_NE(&AR2Ref, &AR2); 147 EXPECT_TRUE(AR2.equals(AR2Ref)); 148 } 149 150 } // end anonymous namespace 151