ConstantRangeTest.cpp revision 3a4a884c1618d94202ee714ea5c899cd80d1c536 
1//===- llvm/unittest/Support/ConstantRangeTest.cpp - ConstantRange 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/Support/ConstantRange.h"
11
12#include "gtest/gtest.h"
13
14using namespace llvm;
15
16namespace {
17
18class ConstantRangeTest : public ::testing::Test {
19protected:
20  static ConstantRange Full;
21  static ConstantRange Empty;
22  static ConstantRange One;
23  static ConstantRange Some;
24  static ConstantRange Wrap;
25};
26
27ConstantRange ConstantRangeTest::Full(16);
28ConstantRange ConstantRangeTest::Empty(16, false);
29ConstantRange ConstantRangeTest::One(APInt(16, 0xa));
30ConstantRange ConstantRangeTest::Some(APInt(16, 0xa), APInt(16, 0xaaa));
31ConstantRange ConstantRangeTest::Wrap(APInt(16, 0xaaa), APInt(16, 0xa));
32
33TEST_F(ConstantRangeTest, Basics) {
34  EXPECT_TRUE(Full.isFullSet());
35  EXPECT_FALSE(Full.isEmptySet());
36  EXPECT_FALSE(Full.isWrappedSet());
37  EXPECT_TRUE(Full.contains(APInt(16, 0x0)));
38  EXPECT_TRUE(Full.contains(APInt(16, 0x9)));
39  EXPECT_TRUE(Full.contains(APInt(16, 0xa)));
40  EXPECT_TRUE(Full.contains(APInt(16, 0xaa9)));
41  EXPECT_TRUE(Full.contains(APInt(16, 0xaaa)));
42
43  EXPECT_FALSE(Empty.isFullSet());
44  EXPECT_TRUE(Empty.isEmptySet());
45  EXPECT_FALSE(Empty.isWrappedSet());
46  EXPECT_FALSE(Empty.contains(APInt(16, 0x0)));
47  EXPECT_FALSE(Empty.contains(APInt(16, 0x9)));
48  EXPECT_FALSE(Empty.contains(APInt(16, 0xa)));
49  EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9)));
50  EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa)));
51
52  EXPECT_FALSE(One.isFullSet());
53  EXPECT_FALSE(One.isEmptySet());
54  EXPECT_FALSE(One.isWrappedSet());
55  EXPECT_FALSE(One.contains(APInt(16, 0x0)));
56  EXPECT_FALSE(One.contains(APInt(16, 0x9)));
57  EXPECT_TRUE(One.contains(APInt(16, 0xa)));
58  EXPECT_FALSE(One.contains(APInt(16, 0xaa9)));
59  EXPECT_FALSE(One.contains(APInt(16, 0xaaa)));
60
61  EXPECT_FALSE(Some.isFullSet());
62  EXPECT_FALSE(Some.isEmptySet());
63  EXPECT_FALSE(Some.isWrappedSet());
64  EXPECT_FALSE(Some.contains(APInt(16, 0x0)));
65  EXPECT_FALSE(Some.contains(APInt(16, 0x9)));
66  EXPECT_TRUE(Some.contains(APInt(16, 0xa)));
67  EXPECT_TRUE(Some.contains(APInt(16, 0xaa9)));
68  EXPECT_FALSE(Some.contains(APInt(16, 0xaaa)));
69
70  EXPECT_FALSE(Wrap.isFullSet());
71  EXPECT_FALSE(Wrap.isEmptySet());
72  EXPECT_TRUE(Wrap.isWrappedSet());
73  EXPECT_TRUE(Wrap.contains(APInt(16, 0x0)));
74  EXPECT_TRUE(Wrap.contains(APInt(16, 0x9)));
75  EXPECT_FALSE(Wrap.contains(APInt(16, 0xa)));
76  EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9)));
77  EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa)));
78}
79
80TEST_F(ConstantRangeTest, Equality) {
81  EXPECT_EQ(Full, Full);
82  EXPECT_EQ(Empty, Empty);
83  EXPECT_EQ(One, One);
84  EXPECT_EQ(Some, Some);
85  EXPECT_EQ(Wrap, Wrap);
86  EXPECT_NE(Full, Empty);
87  EXPECT_NE(Full, One);
88  EXPECT_NE(Full, Some);
89  EXPECT_NE(Full, Wrap);
90  EXPECT_NE(Empty, One);
91  EXPECT_NE(Empty, Some);
92  EXPECT_NE(Empty, Wrap);
93  EXPECT_NE(One, Some);
94  EXPECT_NE(One, Wrap);
95  EXPECT_NE(Some, Wrap);
96}
97
98TEST_F(ConstantRangeTest, SingleElement) {
99  EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(NULL));
100  EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(NULL));
101  EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa));
102  EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(NULL));
103  EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(NULL));
104
105  EXPECT_FALSE(Full.isSingleElement());
106  EXPECT_FALSE(Empty.isSingleElement());
107  EXPECT_TRUE(One.isSingleElement());
108  EXPECT_FALSE(Some.isSingleElement());
109  EXPECT_FALSE(Wrap.isSingleElement());
110}
111
112TEST_F(ConstantRangeTest, GetSetSize) {
113  EXPECT_EQ(Full.getSetSize(), APInt(16, 0));
114  EXPECT_EQ(Empty.getSetSize(), APInt(16, 0));
115  EXPECT_EQ(One.getSetSize(), APInt(16, 1));
116  EXPECT_EQ(Some.getSetSize(), APInt(16, 0xaa0));
117  EXPECT_EQ(Wrap.getSetSize(), APInt(16, 0x10000 - 0xaa0));
118}
119
120TEST_F(ConstantRangeTest, GetMinsAndMaxes) {
121  EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX));
122  EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa));
123  EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9));
124  EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX));
125
126  EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0));
127  EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa));
128  EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa));
129  EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0));
130
131  EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX));
132  EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa));
133  EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9));
134  EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX));
135
136  EXPECT_EQ(Full.getSignedMin(), APInt(16, INT16_MIN));
137  EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa));
138  EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa));
139  EXPECT_EQ(Wrap.getSignedMin(), APInt(16, INT16_MIN));
140
141  // Found by Klee
142  EXPECT_EQ(ConstantRange(APInt(4, 7), APInt(4, 0)).getSignedMax(),
143            APInt(4, 7));
144}
145
146TEST_F(ConstantRangeTest, Trunc) {
147  ConstantRange TFull = Full.truncate(10);
148  ConstantRange TEmpty = Empty.truncate(10);
149  ConstantRange TOne = One.truncate(10);
150  ConstantRange TSome = Some.truncate(10);
151  ConstantRange TWrap = Wrap.truncate(10);
152  EXPECT_TRUE(TFull.isFullSet());
153  EXPECT_TRUE(TEmpty.isEmptySet());
154  EXPECT_EQ(TOne, ConstantRange(APInt(One.getLower()).trunc(10),
155                                APInt(One.getUpper()).trunc(10)));
156  EXPECT_TRUE(TSome.isFullSet());
157}
158
159TEST_F(ConstantRangeTest, ZExt) {
160  ConstantRange ZFull = Full.zeroExtend(20);
161  ConstantRange ZEmpty = Empty.zeroExtend(20);
162  ConstantRange ZOne = One.zeroExtend(20);
163  ConstantRange ZSome = Some.zeroExtend(20);
164  ConstantRange ZWrap = Wrap.zeroExtend(20);
165  EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
166  EXPECT_TRUE(ZEmpty.isEmptySet());
167  EXPECT_EQ(ZOne, ConstantRange(APInt(One.getLower()).zext(20),
168                                APInt(One.getUpper()).zext(20)));
169  EXPECT_EQ(ZSome, ConstantRange(APInt(Some.getLower()).zext(20),
170                                 APInt(Some.getUpper()).zext(20)));
171  EXPECT_EQ(ZWrap, ConstantRange(APInt(Wrap.getLower()).zext(20),
172                                 APInt(Wrap.getUpper()).zext(20)));
173}
174
175TEST_F(ConstantRangeTest, SExt) {
176  ConstantRange SFull = Full.signExtend(20);
177  ConstantRange SEmpty = Empty.signExtend(20);
178  ConstantRange SOne = One.signExtend(20);
179  ConstantRange SSome = Some.signExtend(20);
180  ConstantRange SWrap = Wrap.signExtend(20);
181  EXPECT_EQ(SFull, ConstantRange(APInt(20, INT16_MIN, true),
182                                 APInt(20, INT16_MAX + 1, true)));
183  EXPECT_TRUE(SEmpty.isEmptySet());
184  EXPECT_EQ(SOne, ConstantRange(APInt(One.getLower()).sext(20),
185                                APInt(One.getUpper()).sext(20)));
186  EXPECT_EQ(SSome, ConstantRange(APInt(Some.getLower()).sext(20),
187                                 APInt(Some.getUpper()).sext(20)));
188  EXPECT_EQ(SWrap, ConstantRange(APInt(Wrap.getLower()).sext(20),
189                                 APInt(Wrap.getUpper()).sext(20)));
190}
191
192TEST_F(ConstantRangeTest, IntersectWith) {
193  EXPECT_TRUE(Empty.intersectWith(Full).isEmptySet());
194  EXPECT_TRUE(Empty.intersectWith(Empty).isEmptySet());
195  EXPECT_TRUE(Empty.intersectWith(One).isEmptySet());
196  EXPECT_TRUE(Empty.intersectWith(Some).isEmptySet());
197  EXPECT_TRUE(Empty.intersectWith(Wrap).isEmptySet());
198  EXPECT_TRUE(Full.intersectWith(Full).isFullSet());
199  EXPECT_TRUE(Some.intersectWith(Some) == Some);
200  EXPECT_TRUE(Some.intersectWith(One) == One);
201  EXPECT_TRUE(Full.intersectWith(One) == One);
202  EXPECT_TRUE(Full.intersectWith(Some) == Some);
203  EXPECT_TRUE(Some.intersectWith(Wrap).isEmptySet());
204  EXPECT_TRUE(One.intersectWith(Wrap).isEmptySet());
205  EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One));
206
207  // Klee generated testcase from PR4545.
208  // The intersection of i16 [4, 2) and [6, 5) is disjoint, looking like
209  // 01..4.6789ABCDEF where the dots represent values not in the intersection.
210  ConstantRange LHS(APInt(16, 4), APInt(16, 2));
211  ConstantRange RHS(APInt(16, 6), APInt(16, 5));
212  EXPECT_EQ(LHS.intersectWith(RHS), LHS);
213}
214
215TEST_F(ConstantRangeTest, UnionWith) {
216  EXPECT_EQ(Wrap.unionWith(One),
217            ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb)));
218  EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One));
219  EXPECT_TRUE(Empty.unionWith(Empty).isEmptySet());
220  EXPECT_TRUE(Full.unionWith(Full).isFullSet());
221  EXPECT_TRUE(Some.unionWith(Wrap).isFullSet());
222}
223
224TEST_F(ConstantRangeTest, SubtractAPInt) {
225  EXPECT_TRUE(Full.subtract(APInt(16, 4)).isFullSet());
226  EXPECT_TRUE(Empty.subtract(APInt(16, 4)).isEmptySet());
227  EXPECT_EQ(Some.subtract(APInt(16, 4)),
228            ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
229  EXPECT_EQ(Wrap.subtract(APInt(16, 4)),
230            ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
231  EXPECT_EQ(One.subtract(APInt(16, 4)),
232            ConstantRange(APInt(16, 0x6)));
233}
234
235TEST_F(ConstantRangeTest, Add) {
236  EXPECT_TRUE(Full.add(APInt(16, 4)).isFullSet());
237  EXPECT_EQ(Full.add(Full), Full);
238  EXPECT_EQ(Full.add(Empty), Empty);
239  EXPECT_EQ(Full.add(One), Full);
240  EXPECT_EQ(Full.add(Some), Full);
241  EXPECT_EQ(Full.add(Wrap), Full);
242  EXPECT_EQ(Empty.add(Empty), Empty);
243  EXPECT_EQ(Empty.add(One), Empty);
244  EXPECT_EQ(Empty.add(Some), Empty);
245  EXPECT_EQ(Empty.add(Wrap), Empty);
246  EXPECT_TRUE(Empty.add(APInt(16, 4)).isEmptySet());
247  EXPECT_EQ(Some.add(APInt(16, 4)),
248            ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
249  EXPECT_EQ(Wrap.add(APInt(16, 4)),
250            ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
251  EXPECT_EQ(One.add(APInt(16, 4)),
252            ConstantRange(APInt(16, 0xe)));
253}
254
255TEST_F(ConstantRangeTest, Multiply) {
256  EXPECT_EQ(Full.multiply(Full), Full);
257  EXPECT_EQ(Full.multiply(Empty), Empty);
258  EXPECT_EQ(Full.multiply(One), Full);
259  EXPECT_EQ(Full.multiply(Some), Full);
260  EXPECT_EQ(Full.multiply(Wrap), Full);
261  EXPECT_EQ(Empty.multiply(Empty), Empty);
262  EXPECT_EQ(Empty.multiply(One), Empty);
263  EXPECT_EQ(Empty.multiply(Some), Empty);
264  EXPECT_EQ(Empty.multiply(Wrap), Empty);
265  EXPECT_EQ(One.multiply(One), ConstantRange(APInt(16, 0xa*0xa),
266                                             APInt(16, 0xa*0xa + 1)));
267  EXPECT_EQ(One.multiply(Some), ConstantRange(APInt(16, 0xa*0xa),
268                                              APInt(16, 0xa*0xaa9 + 1)));
269  EXPECT_TRUE(One.multiply(Wrap).isFullSet());
270  EXPECT_TRUE(Some.multiply(Some).isFullSet());
271  EXPECT_EQ(Some.multiply(Wrap), Full);
272  EXPECT_EQ(Wrap.multiply(Wrap), Full);
273
274  // http://llvm.org/PR4545
275  EXPECT_EQ(ConstantRange(APInt(4, 1), APInt(4, 6)).multiply(
276              ConstantRange(APInt(4, 6), APInt(4, 2))),
277            ConstantRange(4, /*isFullSet=*/true));
278}
279
280TEST_F(ConstantRangeTest, UMax) {
281  EXPECT_TRUE(Full.umax(Full).isFullSet());
282  EXPECT_TRUE(Full.umax(Empty).isEmptySet());
283  EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
284  EXPECT_TRUE(Full.umax(Wrap).isFullSet());
285  EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
286  EXPECT_EQ(Empty.umax(Empty), Empty);
287  EXPECT_EQ(Empty.umax(Some), Empty);
288  EXPECT_EQ(Empty.umax(Wrap), Empty);
289  EXPECT_EQ(Empty.umax(One), Empty);
290  EXPECT_EQ(Some.umax(Some), Some);
291  EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
292  EXPECT_EQ(Some.umax(One), Some);
293  // TODO: ConstantRange is currently over-conservative here.
294  EXPECT_EQ(Wrap.umax(Wrap), Full);
295  EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
296  EXPECT_EQ(One.umax(One), One);
297}
298
299TEST_F(ConstantRangeTest, SMax) {
300  EXPECT_TRUE(Full.smax(Full).isFullSet());
301  EXPECT_TRUE(Full.smax(Empty).isEmptySet());
302  EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa),
303                             APInt::getSignedMinValue(16)));
304  EXPECT_TRUE(Full.smax(Wrap).isFullSet());
305  EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa),
306                            APInt::getSignedMinValue(16)));
307  EXPECT_EQ(Empty.smax(Empty), Empty);
308  EXPECT_EQ(Empty.smax(Some), Empty);
309  EXPECT_EQ(Empty.smax(Wrap), Empty);
310  EXPECT_EQ(Empty.smax(One), Empty);
311  EXPECT_EQ(Some.smax(Some), Some);
312  EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa),
313                                           APInt(16, INT16_MIN)));
314  EXPECT_EQ(Some.smax(One), Some);
315  EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
316                                          APInt(16, INT16_MIN)));
317  EXPECT_EQ(One.smax(One), One);
318}
319
320TEST_F(ConstantRangeTest, UDiv) {
321  EXPECT_EQ(Full.udiv(Full), Full);
322  EXPECT_EQ(Full.udiv(Empty), Empty);
323  EXPECT_EQ(Full.udiv(One), ConstantRange(APInt(16, 0),
324                                          APInt(16, 0xffff / 0xa + 1)));
325  EXPECT_EQ(Full.udiv(Some), ConstantRange(APInt(16, 0),
326                                           APInt(16, 0xffff / 0xa + 1)));
327  EXPECT_EQ(Full.udiv(Wrap), Full);
328  EXPECT_EQ(Empty.udiv(Empty), Empty);
329  EXPECT_EQ(Empty.udiv(One), Empty);
330  EXPECT_EQ(Empty.udiv(Some), Empty);
331  EXPECT_EQ(Empty.udiv(Wrap), Empty);
332  EXPECT_EQ(One.udiv(One), ConstantRange(APInt(16, 1)));
333  EXPECT_EQ(One.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 2)));
334  EXPECT_EQ(One.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
335  EXPECT_EQ(Some.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 0x111)));
336  EXPECT_EQ(Some.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
337  EXPECT_EQ(Wrap.udiv(Wrap), Full);
338}
339
340}  // anonymous namespace
341