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1 //===- MachineInstrBundleIteratorTest.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 "llvm/CodeGen/MachineInstrBundleIterator.h"
11 #include "llvm/ADT/ilist_node.h"
12 #include "gtest/gtest.h"
13 
14 using namespace llvm;
15 
16 namespace {
17 
18 struct MyBundledInstr
19     : public ilist_node<MyBundledInstr, ilist_sentinel_tracking<true>> {
isBundledWithPred__anon5811a35c0111::MyBundledInstr20   bool isBundledWithPred() const { return true; }
isBundledWithSucc__anon5811a35c0111::MyBundledInstr21   bool isBundledWithSucc() const { return true; }
22 };
23 typedef MachineInstrBundleIterator<MyBundledInstr> bundled_iterator;
24 typedef MachineInstrBundleIterator<const MyBundledInstr> const_bundled_iterator;
25 typedef MachineInstrBundleIterator<MyBundledInstr, true>
26     reverse_bundled_iterator;
27 typedef MachineInstrBundleIterator<const MyBundledInstr, true>
28     const_reverse_bundled_iterator;
29 
30 #ifdef GTEST_HAS_DEATH_TEST
31 #ifndef NDEBUG
TEST(MachineInstrBundleIteratorTest,CheckForBundles)32 TEST(MachineInstrBundleIteratorTest, CheckForBundles) {
33   MyBundledInstr MBI;
34   auto I = MBI.getIterator();
35   auto RI = I.getReverse();
36 
37   // Confirm that MBI is always considered bundled.
38   EXPECT_TRUE(MBI.isBundledWithPred());
39   EXPECT_TRUE(MBI.isBundledWithSucc());
40 
41   // Confirm that iterators check in their constructor for bundled iterators.
42   EXPECT_DEATH((void)static_cast<bundled_iterator>(I),
43                "not legal to initialize");
44   EXPECT_DEATH((void)static_cast<bundled_iterator>(MBI),
45                "not legal to initialize");
46   EXPECT_DEATH((void)static_cast<bundled_iterator>(&MBI),
47                "not legal to initialize");
48   EXPECT_DEATH((void)static_cast<const_bundled_iterator>(I),
49                "not legal to initialize");
50   EXPECT_DEATH((void)static_cast<const_bundled_iterator>(MBI),
51                "not legal to initialize");
52   EXPECT_DEATH((void)static_cast<const_bundled_iterator>(&MBI),
53                "not legal to initialize");
54   EXPECT_DEATH((void)static_cast<reverse_bundled_iterator>(RI),
55                "not legal to initialize");
56   EXPECT_DEATH((void)static_cast<reverse_bundled_iterator>(MBI),
57                "not legal to initialize");
58   EXPECT_DEATH((void)static_cast<reverse_bundled_iterator>(&MBI),
59                "not legal to initialize");
60   EXPECT_DEATH((void)static_cast<const_reverse_bundled_iterator>(RI),
61                "not legal to initialize");
62   EXPECT_DEATH((void)static_cast<const_reverse_bundled_iterator>(MBI),
63                "not legal to initialize");
64   EXPECT_DEATH((void)static_cast<const_reverse_bundled_iterator>(&MBI),
65                "not legal to initialize");
66 }
67 #endif
68 #endif
69 
TEST(MachineInstrBundleIteratorTest,CompareToBundledMI)70 TEST(MachineInstrBundleIteratorTest, CompareToBundledMI) {
71   MyBundledInstr MBI;
72   const MyBundledInstr &CMBI = MBI;
73   bundled_iterator I;
74   const_bundled_iterator CI;
75 
76   // Confirm that MBI is always considered bundled.
77   EXPECT_TRUE(MBI.isBundledWithPred());
78   EXPECT_TRUE(MBI.isBundledWithSucc());
79 
80   // These invocations will crash when !NDEBUG if a conversion is taking place.
81   // These checks confirm that comparison operators don't use any conversion
82   // operators.
83   ASSERT_FALSE(MBI == I);
84   ASSERT_FALSE(&MBI == I);
85   ASSERT_FALSE(CMBI == I);
86   ASSERT_FALSE(&CMBI == I);
87   ASSERT_FALSE(I == MBI);
88   ASSERT_FALSE(I == &MBI);
89   ASSERT_FALSE(I == CMBI);
90   ASSERT_FALSE(I == &CMBI);
91   ASSERT_FALSE(MBI == CI);
92   ASSERT_FALSE(&MBI == CI);
93   ASSERT_FALSE(CMBI == CI);
94   ASSERT_FALSE(&CMBI == CI);
95   ASSERT_FALSE(CI == MBI);
96   ASSERT_FALSE(CI == &MBI);
97   ASSERT_FALSE(CI == CMBI);
98   ASSERT_FALSE(CI == &CMBI);
99   ASSERT_FALSE(MBI.getIterator() == I);
100   ASSERT_FALSE(CMBI.getIterator() == I);
101   ASSERT_FALSE(I == MBI.getIterator());
102   ASSERT_FALSE(I == CMBI.getIterator());
103   ASSERT_FALSE(MBI.getIterator() == CI);
104   ASSERT_FALSE(CMBI.getIterator() == CI);
105   ASSERT_FALSE(CI == MBI.getIterator());
106   ASSERT_FALSE(CI == CMBI.getIterator());
107   ASSERT_TRUE(MBI != I);
108   ASSERT_TRUE(&MBI != I);
109   ASSERT_TRUE(CMBI != I);
110   ASSERT_TRUE(&CMBI != I);
111   ASSERT_TRUE(I != MBI);
112   ASSERT_TRUE(I != &MBI);
113   ASSERT_TRUE(I != CMBI);
114   ASSERT_TRUE(I != &CMBI);
115   ASSERT_TRUE(MBI != CI);
116   ASSERT_TRUE(&MBI != CI);
117   ASSERT_TRUE(CMBI != CI);
118   ASSERT_TRUE(&CMBI != CI);
119   ASSERT_TRUE(CI != MBI);
120   ASSERT_TRUE(CI != &MBI);
121   ASSERT_TRUE(CI != CMBI);
122   ASSERT_TRUE(CI != &CMBI);
123   ASSERT_TRUE(MBI.getIterator() != I);
124   ASSERT_TRUE(CMBI.getIterator() != I);
125   ASSERT_TRUE(I != MBI.getIterator());
126   ASSERT_TRUE(I != CMBI.getIterator());
127   ASSERT_TRUE(MBI.getIterator() != CI);
128   ASSERT_TRUE(CMBI.getIterator() != CI);
129   ASSERT_TRUE(CI != MBI.getIterator());
130   ASSERT_TRUE(CI != CMBI.getIterator());
131 }
132 
133 struct MyUnbundledInstr
134     : ilist_node<MyUnbundledInstr, ilist_sentinel_tracking<true>> {
isBundledWithPred__anon5811a35c0111::MyUnbundledInstr135   bool isBundledWithPred() const { return false; }
isBundledWithSucc__anon5811a35c0111::MyUnbundledInstr136   bool isBundledWithSucc() const { return false; }
137 };
138 typedef MachineInstrBundleIterator<MyUnbundledInstr> unbundled_iterator;
139 typedef MachineInstrBundleIterator<const MyUnbundledInstr>
140     const_unbundled_iterator;
141 typedef MachineInstrBundleIterator<MyUnbundledInstr, true>
142     reverse_unbundled_iterator;
143 typedef MachineInstrBundleIterator<const MyUnbundledInstr, true>
144     const_reverse_unbundled_iterator;
145 
TEST(MachineInstrBundleIteratorTest,ReverseConstructor)146 TEST(MachineInstrBundleIteratorTest, ReverseConstructor) {
147   simple_ilist<MyUnbundledInstr, ilist_sentinel_tracking<true>> L;
148   const auto &CL = L;
149   MyUnbundledInstr A, B;
150   L.insert(L.end(), A);
151   L.insert(L.end(), B);
152 
153   // Save typing.
154   typedef MachineInstrBundleIterator<MyUnbundledInstr> iterator;
155   typedef MachineInstrBundleIterator<MyUnbundledInstr, true> reverse_iterator;
156   typedef MachineInstrBundleIterator<const MyUnbundledInstr> const_iterator;
157   typedef MachineInstrBundleIterator<const MyUnbundledInstr, true>
158       const_reverse_iterator;
159 
160   // Convert to bundle iterators.
161   auto begin = [&]() -> iterator { return L.begin(); };
162   auto end = [&]() -> iterator { return L.end(); };
163   auto rbegin = [&]() -> reverse_iterator { return L.rbegin(); };
164   auto rend = [&]() -> reverse_iterator { return L.rend(); };
165   auto cbegin = [&]() -> const_iterator { return CL.begin(); };
166   auto cend = [&]() -> const_iterator { return CL.end(); };
167   auto crbegin = [&]() -> const_reverse_iterator { return CL.rbegin(); };
168   auto crend = [&]() -> const_reverse_iterator { return CL.rend(); };
169 
170   // Check conversion values.
171   EXPECT_EQ(begin(), iterator(rend()));
172   EXPECT_EQ(++begin(), iterator(++rbegin()));
173   EXPECT_EQ(end(), iterator(rbegin()));
174   EXPECT_EQ(rbegin(), reverse_iterator(end()));
175   EXPECT_EQ(++rbegin(), reverse_iterator(++begin()));
176   EXPECT_EQ(rend(), reverse_iterator(begin()));
177 
178   // Check const iterator constructors.
179   EXPECT_EQ(cbegin(), const_iterator(rend()));
180   EXPECT_EQ(cbegin(), const_iterator(crend()));
181   EXPECT_EQ(crbegin(), const_reverse_iterator(end()));
182   EXPECT_EQ(crbegin(), const_reverse_iterator(cend()));
183 
184   // Confirm lack of implicit conversions.
185   static_assert(!std::is_convertible<iterator, reverse_iterator>::value,
186                 "unexpected implicit conversion");
187   static_assert(!std::is_convertible<reverse_iterator, iterator>::value,
188                 "unexpected implicit conversion");
189   static_assert(
190       !std::is_convertible<const_iterator, const_reverse_iterator>::value,
191       "unexpected implicit conversion");
192   static_assert(
193       !std::is_convertible<const_reverse_iterator, const_iterator>::value,
194       "unexpected implicit conversion");
195 }
196 
197 } // end namespace
198