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#include "llvm/Instructions.h"
12
13#include "gtest/gtest.h"
14
15using namespace llvm;
16
17namespace {
18
19class ConstantRangeTest : public ::testing::Test {
20protected:
21  static ConstantRange Full;
22  static ConstantRange Empty;
23  static ConstantRange One;
24  static ConstantRange Some;
25  static ConstantRange Wrap;
26};
27
28ConstantRange ConstantRangeTest::Full(16);
29ConstantRange ConstantRangeTest::Empty(16, false);
30ConstantRange ConstantRangeTest::One(APInt(16, 0xa));
31ConstantRange ConstantRangeTest::Some(APInt(16, 0xa), APInt(16, 0xaaa));
32ConstantRange ConstantRangeTest::Wrap(APInt(16, 0xaaa), APInt(16, 0xa));
33
34TEST_F(ConstantRangeTest, Basics) {
35  EXPECT_TRUE(Full.isFullSet());
36  EXPECT_FALSE(Full.isEmptySet());
37  EXPECT_TRUE(Full.inverse().isEmptySet());
38  EXPECT_FALSE(Full.isWrappedSet());
39  EXPECT_TRUE(Full.contains(APInt(16, 0x0)));
40  EXPECT_TRUE(Full.contains(APInt(16, 0x9)));
41  EXPECT_TRUE(Full.contains(APInt(16, 0xa)));
42  EXPECT_TRUE(Full.contains(APInt(16, 0xaa9)));
43  EXPECT_TRUE(Full.contains(APInt(16, 0xaaa)));
44
45  EXPECT_FALSE(Empty.isFullSet());
46  EXPECT_TRUE(Empty.isEmptySet());
47  EXPECT_TRUE(Empty.inverse().isFullSet());
48  EXPECT_FALSE(Empty.isWrappedSet());
49  EXPECT_FALSE(Empty.contains(APInt(16, 0x0)));
50  EXPECT_FALSE(Empty.contains(APInt(16, 0x9)));
51  EXPECT_FALSE(Empty.contains(APInt(16, 0xa)));
52  EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9)));
53  EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa)));
54
55  EXPECT_FALSE(One.isFullSet());
56  EXPECT_FALSE(One.isEmptySet());
57  EXPECT_FALSE(One.isWrappedSet());
58  EXPECT_FALSE(One.contains(APInt(16, 0x0)));
59  EXPECT_FALSE(One.contains(APInt(16, 0x9)));
60  EXPECT_TRUE(One.contains(APInt(16, 0xa)));
61  EXPECT_FALSE(One.contains(APInt(16, 0xaa9)));
62  EXPECT_FALSE(One.contains(APInt(16, 0xaaa)));
63  EXPECT_FALSE(One.inverse().contains(APInt(16, 0xa)));
64
65  EXPECT_FALSE(Some.isFullSet());
66  EXPECT_FALSE(Some.isEmptySet());
67  EXPECT_FALSE(Some.isWrappedSet());
68  EXPECT_FALSE(Some.contains(APInt(16, 0x0)));
69  EXPECT_FALSE(Some.contains(APInt(16, 0x9)));
70  EXPECT_TRUE(Some.contains(APInt(16, 0xa)));
71  EXPECT_TRUE(Some.contains(APInt(16, 0xaa9)));
72  EXPECT_FALSE(Some.contains(APInt(16, 0xaaa)));
73
74  EXPECT_FALSE(Wrap.isFullSet());
75  EXPECT_FALSE(Wrap.isEmptySet());
76  EXPECT_TRUE(Wrap.isWrappedSet());
77  EXPECT_TRUE(Wrap.contains(APInt(16, 0x0)));
78  EXPECT_TRUE(Wrap.contains(APInt(16, 0x9)));
79  EXPECT_FALSE(Wrap.contains(APInt(16, 0xa)));
80  EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9)));
81  EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa)));
82}
83
84TEST_F(ConstantRangeTest, Equality) {
85  EXPECT_EQ(Full, Full);
86  EXPECT_EQ(Empty, Empty);
87  EXPECT_EQ(One, One);
88  EXPECT_EQ(Some, Some);
89  EXPECT_EQ(Wrap, Wrap);
90  EXPECT_NE(Full, Empty);
91  EXPECT_NE(Full, One);
92  EXPECT_NE(Full, Some);
93  EXPECT_NE(Full, Wrap);
94  EXPECT_NE(Empty, One);
95  EXPECT_NE(Empty, Some);
96  EXPECT_NE(Empty, Wrap);
97  EXPECT_NE(One, Some);
98  EXPECT_NE(One, Wrap);
99  EXPECT_NE(Some, Wrap);
100}
101
102TEST_F(ConstantRangeTest, SingleElement) {
103  EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(NULL));
104  EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(NULL));
105  EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa));
106  EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(NULL));
107  EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(NULL));
108
109  EXPECT_FALSE(Full.isSingleElement());
110  EXPECT_FALSE(Empty.isSingleElement());
111  EXPECT_TRUE(One.isSingleElement());
112  EXPECT_FALSE(Some.isSingleElement());
113  EXPECT_FALSE(Wrap.isSingleElement());
114}
115
116TEST_F(ConstantRangeTest, GetSetSize) {
117  EXPECT_EQ(Full.getSetSize(), APInt(16, 0));
118  EXPECT_EQ(Empty.getSetSize(), APInt(16, 0));
119  EXPECT_EQ(One.getSetSize(), APInt(16, 1));
120  EXPECT_EQ(Some.getSetSize(), APInt(16, 0xaa0));
121  EXPECT_EQ(Wrap.getSetSize(), APInt(16, 0x10000 - 0xaa0));
122}
123
124TEST_F(ConstantRangeTest, GetMinsAndMaxes) {
125  EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX));
126  EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa));
127  EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9));
128  EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX));
129
130  EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0));
131  EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa));
132  EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa));
133  EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0));
134
135  EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX));
136  EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa));
137  EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9));
138  EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX));
139
140  EXPECT_EQ(Full.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
141  EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa));
142  EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa));
143  EXPECT_EQ(Wrap.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
144
145  // Found by Klee
146  EXPECT_EQ(ConstantRange(APInt(4, 7), APInt(4, 0)).getSignedMax(),
147            APInt(4, 7));
148}
149
150TEST_F(ConstantRangeTest, SignWrapped) {
151  EXPECT_TRUE(Full.isSignWrappedSet());
152  EXPECT_FALSE(Empty.isSignWrappedSet());
153  EXPECT_FALSE(One.isSignWrappedSet());
154  EXPECT_FALSE(Some.isSignWrappedSet());
155  EXPECT_TRUE(Wrap.isSignWrappedSet());
156
157  EXPECT_FALSE(ConstantRange(APInt(8, 127), APInt(8, 128)).isSignWrappedSet());
158  EXPECT_TRUE(ConstantRange(APInt(8, 127), APInt(8, 129)).isSignWrappedSet());
159  EXPECT_FALSE(ConstantRange(APInt(8, 128), APInt(8, 129)).isSignWrappedSet());
160  EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 9)).isSignWrappedSet());
161  EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 250)).isSignWrappedSet());
162  EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 10)).isSignWrappedSet());
163  EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 251)).isSignWrappedSet());
164}
165
166TEST_F(ConstantRangeTest, Trunc) {
167  ConstantRange TFull = Full.truncate(10);
168  ConstantRange TEmpty = Empty.truncate(10);
169  ConstantRange TOne = One.truncate(10);
170  ConstantRange TSome = Some.truncate(10);
171  ConstantRange TWrap = Wrap.truncate(10);
172  EXPECT_TRUE(TFull.isFullSet());
173  EXPECT_TRUE(TEmpty.isEmptySet());
174  EXPECT_EQ(TOne, ConstantRange(One.getLower().trunc(10),
175                                One.getUpper().trunc(10)));
176  EXPECT_TRUE(TSome.isFullSet());
177}
178
179TEST_F(ConstantRangeTest, ZExt) {
180  ConstantRange ZFull = Full.zeroExtend(20);
181  ConstantRange ZEmpty = Empty.zeroExtend(20);
182  ConstantRange ZOne = One.zeroExtend(20);
183  ConstantRange ZSome = Some.zeroExtend(20);
184  ConstantRange ZWrap = Wrap.zeroExtend(20);
185  EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
186  EXPECT_TRUE(ZEmpty.isEmptySet());
187  EXPECT_EQ(ZOne, ConstantRange(One.getLower().zext(20),
188                                One.getUpper().zext(20)));
189  EXPECT_EQ(ZSome, ConstantRange(Some.getLower().zext(20),
190                                 Some.getUpper().zext(20)));
191  EXPECT_EQ(ZWrap, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
192}
193
194TEST_F(ConstantRangeTest, SExt) {
195  ConstantRange SFull = Full.signExtend(20);
196  ConstantRange SEmpty = Empty.signExtend(20);
197  ConstantRange SOne = One.signExtend(20);
198  ConstantRange SSome = Some.signExtend(20);
199  ConstantRange SWrap = Wrap.signExtend(20);
200  EXPECT_EQ(SFull, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
201                                 APInt(20, INT16_MAX + 1, true)));
202  EXPECT_TRUE(SEmpty.isEmptySet());
203  EXPECT_EQ(SOne, ConstantRange(One.getLower().sext(20),
204                                One.getUpper().sext(20)));
205  EXPECT_EQ(SSome, ConstantRange(Some.getLower().sext(20),
206                                 Some.getUpper().sext(20)));
207  EXPECT_EQ(SWrap, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
208                                 APInt(20, INT16_MAX + 1, true)));
209
210  EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, 140)).signExtend(16),
211            ConstantRange(APInt(16, -128), APInt(16, 128)));
212}
213
214TEST_F(ConstantRangeTest, IntersectWith) {
215  EXPECT_EQ(Empty.intersectWith(Full), Empty);
216  EXPECT_EQ(Empty.intersectWith(Empty), Empty);
217  EXPECT_EQ(Empty.intersectWith(One), Empty);
218  EXPECT_EQ(Empty.intersectWith(Some), Empty);
219  EXPECT_EQ(Empty.intersectWith(Wrap), Empty);
220  EXPECT_EQ(Full.intersectWith(Full), Full);
221  EXPECT_EQ(Some.intersectWith(Some), Some);
222  EXPECT_EQ(Some.intersectWith(One), One);
223  EXPECT_EQ(Full.intersectWith(One), One);
224  EXPECT_EQ(Full.intersectWith(Some), Some);
225  EXPECT_EQ(Some.intersectWith(Wrap), Empty);
226  EXPECT_EQ(One.intersectWith(Wrap), Empty);
227  EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One));
228
229  // Klee generated testcase from PR4545.
230  // The intersection of i16 [4, 2) and [6, 5) is disjoint, looking like
231  // 01..4.6789ABCDEF where the dots represent values not in the intersection.
232  ConstantRange LHS(APInt(16, 4), APInt(16, 2));
233  ConstantRange RHS(APInt(16, 6), APInt(16, 5));
234  EXPECT_TRUE(LHS.intersectWith(RHS) == LHS);
235}
236
237TEST_F(ConstantRangeTest, UnionWith) {
238  EXPECT_EQ(Wrap.unionWith(One),
239            ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb)));
240  EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One));
241  EXPECT_EQ(Empty.unionWith(Empty), Empty);
242  EXPECT_EQ(Full.unionWith(Full), Full);
243  EXPECT_EQ(Some.unionWith(Wrap), Full);
244
245  // PR4545
246  EXPECT_EQ(ConstantRange(APInt(16, 14), APInt(16, 1)).unionWith(
247                                    ConstantRange(APInt(16, 0), APInt(16, 8))),
248            ConstantRange(APInt(16, 14), APInt(16, 8)));
249  EXPECT_EQ(ConstantRange(APInt(16, 6), APInt(16, 4)).unionWith(
250                                    ConstantRange(APInt(16, 4), APInt(16, 0))),
251              ConstantRange(16));
252  EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 0)).unionWith(
253                                    ConstantRange(APInt(16, 2), APInt(16, 1))),
254              ConstantRange(16));
255}
256
257TEST_F(ConstantRangeTest, SubtractAPInt) {
258  EXPECT_EQ(Full.subtract(APInt(16, 4)), Full);
259  EXPECT_EQ(Empty.subtract(APInt(16, 4)), Empty);
260  EXPECT_EQ(Some.subtract(APInt(16, 4)),
261            ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
262  EXPECT_EQ(Wrap.subtract(APInt(16, 4)),
263            ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
264  EXPECT_EQ(One.subtract(APInt(16, 4)),
265            ConstantRange(APInt(16, 0x6)));
266}
267
268TEST_F(ConstantRangeTest, Add) {
269  EXPECT_EQ(Full.add(APInt(16, 4)), Full);
270  EXPECT_EQ(Full.add(Full), Full);
271  EXPECT_EQ(Full.add(Empty), Empty);
272  EXPECT_EQ(Full.add(One), Full);
273  EXPECT_EQ(Full.add(Some), Full);
274  EXPECT_EQ(Full.add(Wrap), Full);
275  EXPECT_EQ(Empty.add(Empty), Empty);
276  EXPECT_EQ(Empty.add(One), Empty);
277  EXPECT_EQ(Empty.add(Some), Empty);
278  EXPECT_EQ(Empty.add(Wrap), Empty);
279  EXPECT_EQ(Empty.add(APInt(16, 4)), Empty);
280  EXPECT_EQ(Some.add(APInt(16, 4)),
281            ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
282  EXPECT_EQ(Wrap.add(APInt(16, 4)),
283            ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
284  EXPECT_EQ(One.add(APInt(16, 4)),
285            ConstantRange(APInt(16, 0xe)));
286}
287
288TEST_F(ConstantRangeTest, Sub) {
289  EXPECT_EQ(Full.sub(APInt(16, 4)), Full);
290  EXPECT_EQ(Full.sub(Full), Full);
291  EXPECT_EQ(Full.sub(Empty), Empty);
292  EXPECT_EQ(Full.sub(One), Full);
293  EXPECT_EQ(Full.sub(Some), Full);
294  EXPECT_EQ(Full.sub(Wrap), Full);
295  EXPECT_EQ(Empty.sub(Empty), Empty);
296  EXPECT_EQ(Empty.sub(One), Empty);
297  EXPECT_EQ(Empty.sub(Some), Empty);
298  EXPECT_EQ(Empty.sub(Wrap), Empty);
299  EXPECT_EQ(Empty.sub(APInt(16, 4)), Empty);
300  EXPECT_EQ(Some.sub(APInt(16, 4)),
301            ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
302  EXPECT_EQ(Some.sub(Some),
303            ConstantRange(APInt(16, 0xf561), APInt(16, 0xaa0)));
304  EXPECT_EQ(Wrap.sub(APInt(16, 4)),
305            ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
306  EXPECT_EQ(One.sub(APInt(16, 4)),
307            ConstantRange(APInt(16, 0x6)));
308}
309
310TEST_F(ConstantRangeTest, Multiply) {
311  EXPECT_EQ(Full.multiply(Full), Full);
312  EXPECT_EQ(Full.multiply(Empty), Empty);
313  EXPECT_EQ(Full.multiply(One), Full);
314  EXPECT_EQ(Full.multiply(Some), Full);
315  EXPECT_EQ(Full.multiply(Wrap), Full);
316  EXPECT_EQ(Empty.multiply(Empty), Empty);
317  EXPECT_EQ(Empty.multiply(One), Empty);
318  EXPECT_EQ(Empty.multiply(Some), Empty);
319  EXPECT_EQ(Empty.multiply(Wrap), Empty);
320  EXPECT_EQ(One.multiply(One), ConstantRange(APInt(16, 0xa*0xa),
321                                             APInt(16, 0xa*0xa + 1)));
322  EXPECT_EQ(One.multiply(Some), ConstantRange(APInt(16, 0xa*0xa),
323                                              APInt(16, 0xa*0xaa9 + 1)));
324  EXPECT_EQ(One.multiply(Wrap), Full);
325  EXPECT_EQ(Some.multiply(Some), Full);
326  EXPECT_EQ(Some.multiply(Wrap), Full);
327  EXPECT_EQ(Wrap.multiply(Wrap), Full);
328
329  // http://llvm.org/PR4545
330  EXPECT_EQ(ConstantRange(APInt(4, 1), APInt(4, 6)).multiply(
331                ConstantRange(APInt(4, 6), APInt(4, 2))),
332            ConstantRange(4, /*isFullSet=*/true));
333}
334
335TEST_F(ConstantRangeTest, UMax) {
336  EXPECT_EQ(Full.umax(Full), Full);
337  EXPECT_EQ(Full.umax(Empty), Empty);
338  EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
339  EXPECT_EQ(Full.umax(Wrap), Full);
340  EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
341  EXPECT_EQ(Empty.umax(Empty), Empty);
342  EXPECT_EQ(Empty.umax(Some), Empty);
343  EXPECT_EQ(Empty.umax(Wrap), Empty);
344  EXPECT_EQ(Empty.umax(One), Empty);
345  EXPECT_EQ(Some.umax(Some), Some);
346  EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
347  EXPECT_EQ(Some.umax(One), Some);
348  // TODO: ConstantRange is currently over-conservative here.
349  EXPECT_EQ(Wrap.umax(Wrap), Full);
350  EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
351  EXPECT_EQ(One.umax(One), One);
352}
353
354TEST_F(ConstantRangeTest, SMax) {
355  EXPECT_EQ(Full.smax(Full), Full);
356  EXPECT_EQ(Full.smax(Empty), Empty);
357  EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa),
358                                           APInt::getSignedMinValue(16)));
359  EXPECT_EQ(Full.smax(Wrap), Full);
360  EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa),
361                                          APInt::getSignedMinValue(16)));
362  EXPECT_EQ(Empty.smax(Empty), Empty);
363  EXPECT_EQ(Empty.smax(Some), Empty);
364  EXPECT_EQ(Empty.smax(Wrap), Empty);
365  EXPECT_EQ(Empty.smax(One), Empty);
366  EXPECT_EQ(Some.smax(Some), Some);
367  EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa),
368                                           APInt(16, (uint64_t)INT16_MIN)));
369  EXPECT_EQ(Some.smax(One), Some);
370  EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
371                                          APInt(16, (uint64_t)INT16_MIN)));
372  EXPECT_EQ(One.smax(One), One);
373}
374
375TEST_F(ConstantRangeTest, UDiv) {
376  EXPECT_EQ(Full.udiv(Full), Full);
377  EXPECT_EQ(Full.udiv(Empty), Empty);
378  EXPECT_EQ(Full.udiv(One), ConstantRange(APInt(16, 0),
379                                          APInt(16, 0xffff / 0xa + 1)));
380  EXPECT_EQ(Full.udiv(Some), ConstantRange(APInt(16, 0),
381                                           APInt(16, 0xffff / 0xa + 1)));
382  EXPECT_EQ(Full.udiv(Wrap), Full);
383  EXPECT_EQ(Empty.udiv(Empty), Empty);
384  EXPECT_EQ(Empty.udiv(One), Empty);
385  EXPECT_EQ(Empty.udiv(Some), Empty);
386  EXPECT_EQ(Empty.udiv(Wrap), Empty);
387  EXPECT_EQ(One.udiv(One), ConstantRange(APInt(16, 1)));
388  EXPECT_EQ(One.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 2)));
389  EXPECT_EQ(One.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
390  EXPECT_EQ(Some.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 0x111)));
391  EXPECT_EQ(Some.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
392  EXPECT_EQ(Wrap.udiv(Wrap), Full);
393}
394
395TEST_F(ConstantRangeTest, Shl) {
396  EXPECT_EQ(Full.shl(Full), Full);
397  EXPECT_EQ(Full.shl(Empty), Empty);
398  EXPECT_EQ(Full.shl(One), Full);    // TODO: [0, (-1 << 0xa) + 1)
399  EXPECT_EQ(Full.shl(Some), Full);   // TODO: [0, (-1 << 0xa) + 1)
400  EXPECT_EQ(Full.shl(Wrap), Full);
401  EXPECT_EQ(Empty.shl(Empty), Empty);
402  EXPECT_EQ(Empty.shl(One), Empty);
403  EXPECT_EQ(Empty.shl(Some), Empty);
404  EXPECT_EQ(Empty.shl(Wrap), Empty);
405  EXPECT_EQ(One.shl(One), ConstantRange(APInt(16, 0xa << 0xa),
406                                        APInt(16, (0xa << 0xa) + 1)));
407  EXPECT_EQ(One.shl(Some), Full);    // TODO: [0xa << 0xa, 0)
408  EXPECT_EQ(One.shl(Wrap), Full);    // TODO: [0xa, 0xa << 14 + 1)
409  EXPECT_EQ(Some.shl(Some), Full);   // TODO: [0xa << 0xa, 0xfc01)
410  EXPECT_EQ(Some.shl(Wrap), Full);   // TODO: [0xa, 0x7ff << 0x5 + 1)
411  EXPECT_EQ(Wrap.shl(Wrap), Full);
412}
413
414TEST_F(ConstantRangeTest, Lshr) {
415  EXPECT_EQ(Full.lshr(Full), Full);
416  EXPECT_EQ(Full.lshr(Empty), Empty);
417  EXPECT_EQ(Full.lshr(One), ConstantRange(APInt(16, 0),
418                                          APInt(16, (0xffff >> 0xa) + 1)));
419  EXPECT_EQ(Full.lshr(Some), ConstantRange(APInt(16, 0),
420                                           APInt(16, (0xffff >> 0xa) + 1)));
421  EXPECT_EQ(Full.lshr(Wrap), Full);
422  EXPECT_EQ(Empty.lshr(Empty), Empty);
423  EXPECT_EQ(Empty.lshr(One), Empty);
424  EXPECT_EQ(Empty.lshr(Some), Empty);
425  EXPECT_EQ(Empty.lshr(Wrap), Empty);
426  EXPECT_EQ(One.lshr(One), ConstantRange(APInt(16, 0)));
427  EXPECT_EQ(One.lshr(Some), ConstantRange(APInt(16, 0)));
428  EXPECT_EQ(One.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
429  EXPECT_EQ(Some.lshr(Some), ConstantRange(APInt(16, 0),
430                                           APInt(16, (0xaaa >> 0xa) + 1)));
431  EXPECT_EQ(Some.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
432  EXPECT_EQ(Wrap.lshr(Wrap), Full);
433}
434
435TEST(ConstantRange, MakeICmpRegion) {
436  // PR8250
437  ConstantRange SMax = ConstantRange(APInt::getSignedMaxValue(32));
438  EXPECT_TRUE(ConstantRange::makeICmpRegion(ICmpInst::ICMP_SGT,
439                                            SMax).isEmptySet());
440}
441
442}  // anonymous namespace
443