ConstantRangeTest.cpp revision 646ca92bfc20002a5c6d9b2b42e6940fd86ff7c9 
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
142TEST_F(ConstantRangeTest, Trunc) {
143  ConstantRange TFull = Full.truncate(10);
144  ConstantRange TEmpty = Empty.truncate(10);
145  ConstantRange TOne = One.truncate(10);
146  ConstantRange TSome = Some.truncate(10);
147  ConstantRange TWrap = Wrap.truncate(10);
148  EXPECT_TRUE(TFull.isFullSet());
149  EXPECT_TRUE(TEmpty.isEmptySet());
150  EXPECT_EQ(TOne, ConstantRange(APInt(One.getLower()).trunc(10),
151                                APInt(One.getUpper()).trunc(10)));
152  // TODO: ConstantRange is currently over-conservative here.
153  EXPECT_TRUE(TSome.isFullSet());
154}
155
156TEST_F(ConstantRangeTest, ZExt) {
157  ConstantRange ZFull = Full.zeroExtend(20);
158  ConstantRange ZEmpty = Empty.zeroExtend(20);
159  ConstantRange ZOne = One.zeroExtend(20);
160  ConstantRange ZSome = Some.zeroExtend(20);
161  ConstantRange ZWrap = Wrap.zeroExtend(20);
162  EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
163  EXPECT_TRUE(ZEmpty.isEmptySet());
164  EXPECT_EQ(ZOne, ConstantRange(APInt(One.getLower()).zext(20),
165                                APInt(One.getUpper()).zext(20)));
166  EXPECT_EQ(ZSome, ConstantRange(APInt(Some.getLower()).zext(20),
167                                 APInt(Some.getUpper()).zext(20)));
168  EXPECT_EQ(ZWrap, ConstantRange(APInt(Wrap.getLower()).zext(20),
169                                 APInt(Wrap.getUpper()).zext(20)));
170}
171
172TEST_F(ConstantRangeTest, SExt) {
173  ConstantRange SFull = Full.signExtend(20);
174  ConstantRange SEmpty = Empty.signExtend(20);
175  ConstantRange SOne = One.signExtend(20);
176  ConstantRange SSome = Some.signExtend(20);
177  ConstantRange SWrap = Wrap.signExtend(20);
178  EXPECT_EQ(SFull, ConstantRange(APInt(20, INT16_MIN, true),
179                                 APInt(20, INT16_MAX, true)));
180  EXPECT_TRUE(SEmpty.isEmptySet());
181  EXPECT_EQ(SOne, ConstantRange(APInt(One.getLower()).sext(20),
182                                APInt(One.getUpper()).sext(20)));
183  EXPECT_EQ(SSome, ConstantRange(APInt(Some.getLower()).sext(20),
184                                 APInt(Some.getUpper()).sext(20)));
185  EXPECT_EQ(SWrap, ConstantRange(APInt(Wrap.getLower()).sext(20),
186                                 APInt(Wrap.getUpper()).sext(20)));
187}
188
189TEST_F(ConstantRangeTest, IntersectWith) {
190  EXPECT_TRUE(Empty.intersectWith(Full).isEmptySet());
191  EXPECT_TRUE(Empty.intersectWith(Empty).isEmptySet());
192  EXPECT_TRUE(Empty.intersectWith(One).isEmptySet());
193  EXPECT_TRUE(Empty.intersectWith(Some).isEmptySet());
194  EXPECT_TRUE(Empty.intersectWith(Wrap).isEmptySet());
195  EXPECT_TRUE(Full.intersectWith(Full).isFullSet());
196  EXPECT_TRUE(Some.intersectWith(Some) == Some);
197  EXPECT_TRUE(Some.intersectWith(One) == One);
198  EXPECT_TRUE(Full.intersectWith(One) == One);
199  EXPECT_TRUE(Full.intersectWith(Some) == Some);
200  EXPECT_TRUE(Some.intersectWith(Wrap).isEmptySet());
201  EXPECT_TRUE(One.intersectWith(Wrap).isEmptySet());
202  EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One));
203}
204
205TEST_F(ConstantRangeTest, MaximalIntersectWith) {
206  EXPECT_TRUE(Empty.maximalIntersectWith(Full).isEmptySet());
207  EXPECT_TRUE(Empty.maximalIntersectWith(Empty).isEmptySet());
208  EXPECT_TRUE(Empty.maximalIntersectWith(One).isEmptySet());
209  EXPECT_TRUE(Empty.maximalIntersectWith(Some).isEmptySet());
210  EXPECT_TRUE(Empty.maximalIntersectWith(Wrap).isEmptySet());
211  EXPECT_TRUE(Full.maximalIntersectWith(Full).isFullSet());
212  EXPECT_TRUE(Some.maximalIntersectWith(Some) == Some);
213  EXPECT_TRUE(Some.maximalIntersectWith(One) == One);
214  EXPECT_TRUE(Full.maximalIntersectWith(One) == One);
215  EXPECT_TRUE(Full.maximalIntersectWith(Some) == Some);
216  EXPECT_TRUE(Some.maximalIntersectWith(Wrap).isEmptySet());
217  EXPECT_TRUE(One.maximalIntersectWith(Wrap).isEmptySet());
218  EXPECT_EQ(One.maximalIntersectWith(Wrap), Wrap.maximalIntersectWith(One));
219}
220
221TEST_F(ConstantRangeTest, UnionWith) {
222  EXPECT_EQ(Wrap.unionWith(One),
223            ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb)));
224  EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One));
225  EXPECT_TRUE(Empty.unionWith(Empty).isEmptySet());
226  EXPECT_TRUE(Full.unionWith(Full).isFullSet());
227  EXPECT_TRUE(Some.unionWith(Wrap).isFullSet());
228}
229
230TEST_F(ConstantRangeTest, SubtractAPInt) {
231  EXPECT_TRUE(Full.subtract(APInt(16, 4)).isFullSet());
232  EXPECT_TRUE(Empty.subtract(APInt(16, 4)).isEmptySet());
233  EXPECT_EQ(Some.subtract(APInt(16, 4)),
234            ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
235  EXPECT_EQ(Wrap.subtract(APInt(16, 4)),
236            ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
237  EXPECT_EQ(One.subtract(APInt(16, 4)),
238            ConstantRange(APInt(16, 0x6)));
239}
240
241TEST_F(ConstantRangeTest, Add) {
242  EXPECT_TRUE(Full.add(APInt(16, 4)).isFullSet());
243  EXPECT_EQ(Full.add(Empty), Empty);
244  EXPECT_EQ(Full.add(One), Full);
245  EXPECT_EQ(Full.add(Some), Full);
246  EXPECT_EQ(Full.add(Wrap), Full);
247  EXPECT_EQ(Empty.add(Empty), Empty);
248  EXPECT_EQ(Empty.add(One), Empty);
249  EXPECT_EQ(Empty.add(Some), Empty);
250  EXPECT_EQ(Empty.add(Wrap), Empty);
251  EXPECT_TRUE(Empty.add(APInt(16, 4)).isEmptySet());
252  EXPECT_EQ(Some.add(APInt(16, 4)),
253            ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
254  EXPECT_EQ(Wrap.add(APInt(16, 4)),
255            ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
256  EXPECT_EQ(One.add(APInt(16, 4)),
257            ConstantRange(APInt(16, 0xe)));
258}
259
260TEST_F(ConstantRangeTest, Multiply) {
261  EXPECT_EQ(Full.multiply(Full), Full);
262  EXPECT_EQ(Full.multiply(Empty), Empty);
263  EXPECT_EQ(Full.multiply(One), Full);
264  EXPECT_EQ(Full.multiply(Some), Full);
265  EXPECT_EQ(Full.multiply(Wrap), Full);
266  EXPECT_EQ(Empty.multiply(Empty), Empty);
267  EXPECT_EQ(Empty.multiply(One), Empty);
268  EXPECT_EQ(Empty.multiply(Some), Empty);
269  EXPECT_EQ(Empty.multiply(Wrap), Empty);
270  // TODO: ConstantRange is currently over-conservative here.
271  EXPECT_EQ(One.multiply(One), Full);
272  // TODO: ConstantRange is currently over-conservative here.
273  EXPECT_EQ(One.multiply(Some), Full);
274  // TODO: ConstantRange is currently over-conservative here.
275  EXPECT_EQ(One.multiply(Wrap), Full);
276  // TODO: ConstantRange is currently over-conservative here.
277  EXPECT_EQ(Some.multiply(Some), Full);
278  // TODO: ConstantRange is currently over-conservative here.
279  EXPECT_EQ(Some.multiply(Wrap), Full);
280  // TODO: ConstantRange is currently over-conservative here.
281  EXPECT_EQ(Wrap.multiply(Wrap), Full);
282}
283
284TEST_F(ConstantRangeTest, UMax) {
285  EXPECT_TRUE(Full.umax(Full).isFullSet());
286  EXPECT_TRUE(Full.umax(Empty).isEmptySet());
287  EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
288  EXPECT_TRUE(Full.umax(Wrap).isFullSet());
289  EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
290  EXPECT_EQ(Empty.umax(Empty), Empty);
291  EXPECT_EQ(Empty.umax(Some), Empty);
292  EXPECT_EQ(Empty.umax(Wrap), Empty);
293  EXPECT_EQ(Empty.umax(One), Empty);
294  EXPECT_EQ(Some.umax(Some), Some);
295  EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
296  EXPECT_EQ(Some.umax(One), Some);
297  // TODO: ConstantRange is currently over-conservative here.
298  EXPECT_EQ(Wrap.umax(Wrap), Full);
299  EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
300  EXPECT_EQ(One.umax(One), One);
301}
302
303TEST_F(ConstantRangeTest, SMax) {
304  EXPECT_TRUE(Full.smax(Full).isFullSet());
305  EXPECT_TRUE(Full.smax(Empty).isEmptySet());
306  EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa),
307                             APInt::getSignedMinValue(16)));
308  EXPECT_TRUE(Full.smax(Wrap).isFullSet());
309  EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa),
310                            APInt::getSignedMinValue(16)));
311  EXPECT_EQ(Empty.smax(Empty), Empty);
312  EXPECT_EQ(Empty.smax(Some), Empty);
313  EXPECT_EQ(Empty.smax(Wrap), Empty);
314  EXPECT_EQ(Empty.smax(One), Empty);
315  EXPECT_EQ(Some.smax(Some), Some);
316  EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa),
317                                           APInt(16, INT16_MIN)));
318  EXPECT_EQ(Some.smax(One), Some);
319  EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
320                                          APInt(16, INT16_MIN)));
321  EXPECT_EQ(One.smax(One), One);
322}
323
324TEST_F(ConstantRangeTest, UDiv) {
325  EXPECT_EQ(Full.udiv(Full), Full);
326  EXPECT_EQ(Full.udiv(Empty), Empty);
327  EXPECT_EQ(Full.udiv(One), Full);
328  EXPECT_EQ(Full.udiv(Some), Full);
329  EXPECT_EQ(Full.udiv(Wrap), Full);
330  EXPECT_EQ(Empty.udiv(Empty), Empty);
331  EXPECT_EQ(Empty.udiv(One), Empty);
332  EXPECT_EQ(Empty.udiv(Some), Empty);
333  EXPECT_EQ(Empty.udiv(Wrap), Empty);
334  // TODO: ConstantRange is currently over-conservative here.
335  EXPECT_EQ(One.udiv(One), Full);
336  // TODO: ConstantRange is currently over-conservative here.
337  EXPECT_EQ(One.udiv(Some), Full);
338  // TODO: ConstantRange is currently over-conservative here.
339  EXPECT_EQ(One.udiv(Wrap), Full);
340  // TODO: ConstantRange is currently over-conservative here.
341  EXPECT_EQ(Some.udiv(Some), Full);
342  // TODO: ConstantRange is currently over-conservative here.
343  EXPECT_EQ(Some.udiv(Wrap), Full);
344  // TODO: ConstantRange is currently over-conservative here.
345  EXPECT_EQ(Wrap.udiv(Wrap), Full);
346}
347
348}  // anonymous namespace
349