1//===- 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/IR/ConstantRange.h"
11#include "llvm/IR/Instructions.h"
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_TRUE(Full.inverse().isEmptySet());
37  EXPECT_FALSE(Full.isWrappedSet());
38  EXPECT_TRUE(Full.contains(APInt(16, 0x0)));
39  EXPECT_TRUE(Full.contains(APInt(16, 0x9)));
40  EXPECT_TRUE(Full.contains(APInt(16, 0xa)));
41  EXPECT_TRUE(Full.contains(APInt(16, 0xaa9)));
42  EXPECT_TRUE(Full.contains(APInt(16, 0xaaa)));
43
44  EXPECT_FALSE(Empty.isFullSet());
45  EXPECT_TRUE(Empty.isEmptySet());
46  EXPECT_TRUE(Empty.inverse().isFullSet());
47  EXPECT_FALSE(Empty.isWrappedSet());
48  EXPECT_FALSE(Empty.contains(APInt(16, 0x0)));
49  EXPECT_FALSE(Empty.contains(APInt(16, 0x9)));
50  EXPECT_FALSE(Empty.contains(APInt(16, 0xa)));
51  EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9)));
52  EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa)));
53
54  EXPECT_FALSE(One.isFullSet());
55  EXPECT_FALSE(One.isEmptySet());
56  EXPECT_FALSE(One.isWrappedSet());
57  EXPECT_FALSE(One.contains(APInt(16, 0x0)));
58  EXPECT_FALSE(One.contains(APInt(16, 0x9)));
59  EXPECT_TRUE(One.contains(APInt(16, 0xa)));
60  EXPECT_FALSE(One.contains(APInt(16, 0xaa9)));
61  EXPECT_FALSE(One.contains(APInt(16, 0xaaa)));
62  EXPECT_FALSE(One.inverse().contains(APInt(16, 0xa)));
63
64  EXPECT_FALSE(Some.isFullSet());
65  EXPECT_FALSE(Some.isEmptySet());
66  EXPECT_FALSE(Some.isWrappedSet());
67  EXPECT_FALSE(Some.contains(APInt(16, 0x0)));
68  EXPECT_FALSE(Some.contains(APInt(16, 0x9)));
69  EXPECT_TRUE(Some.contains(APInt(16, 0xa)));
70  EXPECT_TRUE(Some.contains(APInt(16, 0xaa9)));
71  EXPECT_FALSE(Some.contains(APInt(16, 0xaaa)));
72
73  EXPECT_FALSE(Wrap.isFullSet());
74  EXPECT_FALSE(Wrap.isEmptySet());
75  EXPECT_TRUE(Wrap.isWrappedSet());
76  EXPECT_TRUE(Wrap.contains(APInt(16, 0x0)));
77  EXPECT_TRUE(Wrap.contains(APInt(16, 0x9)));
78  EXPECT_FALSE(Wrap.contains(APInt(16, 0xa)));
79  EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9)));
80  EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa)));
81}
82
83TEST_F(ConstantRangeTest, Equality) {
84  EXPECT_EQ(Full, Full);
85  EXPECT_EQ(Empty, Empty);
86  EXPECT_EQ(One, One);
87  EXPECT_EQ(Some, Some);
88  EXPECT_EQ(Wrap, Wrap);
89  EXPECT_NE(Full, Empty);
90  EXPECT_NE(Full, One);
91  EXPECT_NE(Full, Some);
92  EXPECT_NE(Full, Wrap);
93  EXPECT_NE(Empty, One);
94  EXPECT_NE(Empty, Some);
95  EXPECT_NE(Empty, Wrap);
96  EXPECT_NE(One, Some);
97  EXPECT_NE(One, Wrap);
98  EXPECT_NE(Some, Wrap);
99}
100
101TEST_F(ConstantRangeTest, SingleElement) {
102  EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(nullptr));
103  EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(nullptr));
104  EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa));
105  EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(nullptr));
106  EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(nullptr));
107
108  EXPECT_FALSE(Full.isSingleElement());
109  EXPECT_FALSE(Empty.isSingleElement());
110  EXPECT_TRUE(One.isSingleElement());
111  EXPECT_FALSE(Some.isSingleElement());
112  EXPECT_FALSE(Wrap.isSingleElement());
113}
114
115TEST_F(ConstantRangeTest, GetSetSize) {
116  EXPECT_EQ(Full.getSetSize(), APInt(17, 65536));
117  EXPECT_EQ(Empty.getSetSize(), APInt(17, 0));
118  EXPECT_EQ(One.getSetSize(), APInt(17, 1));
119  EXPECT_EQ(Some.getSetSize(), APInt(17, 0xaa0));
120
121  ConstantRange Wrap(APInt(4, 7), APInt(4, 3));
122  ConstantRange Wrap2(APInt(4, 8), APInt(4, 7));
123  EXPECT_EQ(Wrap.getSetSize(), APInt(5, 12));
124  EXPECT_EQ(Wrap2.getSetSize(), APInt(5, 15));
125}
126
127TEST_F(ConstantRangeTest, GetMinsAndMaxes) {
128  EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX));
129  EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa));
130  EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9));
131  EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX));
132
133  EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0));
134  EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa));
135  EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa));
136  EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0));
137
138  EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX));
139  EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa));
140  EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9));
141  EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX));
142
143  EXPECT_EQ(Full.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
144  EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa));
145  EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa));
146  EXPECT_EQ(Wrap.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
147
148  // Found by Klee
149  EXPECT_EQ(ConstantRange(APInt(4, 7), APInt(4, 0)).getSignedMax(),
150            APInt(4, 7));
151}
152
153TEST_F(ConstantRangeTest, SignWrapped) {
154  EXPECT_TRUE(Full.isSignWrappedSet());
155  EXPECT_FALSE(Empty.isSignWrappedSet());
156  EXPECT_FALSE(One.isSignWrappedSet());
157  EXPECT_FALSE(Some.isSignWrappedSet());
158  EXPECT_TRUE(Wrap.isSignWrappedSet());
159
160  EXPECT_FALSE(ConstantRange(APInt(8, 127), APInt(8, 128)).isSignWrappedSet());
161  EXPECT_TRUE(ConstantRange(APInt(8, 127), APInt(8, 129)).isSignWrappedSet());
162  EXPECT_FALSE(ConstantRange(APInt(8, 128), APInt(8, 129)).isSignWrappedSet());
163  EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 9)).isSignWrappedSet());
164  EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 250)).isSignWrappedSet());
165  EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 10)).isSignWrappedSet());
166  EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 251)).isSignWrappedSet());
167}
168
169TEST_F(ConstantRangeTest, Trunc) {
170  ConstantRange TFull = Full.truncate(10);
171  ConstantRange TEmpty = Empty.truncate(10);
172  ConstantRange TOne = One.truncate(10);
173  ConstantRange TSome = Some.truncate(10);
174  ConstantRange TWrap = Wrap.truncate(10);
175  EXPECT_TRUE(TFull.isFullSet());
176  EXPECT_TRUE(TEmpty.isEmptySet());
177  EXPECT_EQ(TOne, ConstantRange(One.getLower().trunc(10),
178                                One.getUpper().trunc(10)));
179  EXPECT_TRUE(TSome.isFullSet());
180}
181
182TEST_F(ConstantRangeTest, ZExt) {
183  ConstantRange ZFull = Full.zeroExtend(20);
184  ConstantRange ZEmpty = Empty.zeroExtend(20);
185  ConstantRange ZOne = One.zeroExtend(20);
186  ConstantRange ZSome = Some.zeroExtend(20);
187  ConstantRange ZWrap = Wrap.zeroExtend(20);
188  EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
189  EXPECT_TRUE(ZEmpty.isEmptySet());
190  EXPECT_EQ(ZOne, ConstantRange(One.getLower().zext(20),
191                                One.getUpper().zext(20)));
192  EXPECT_EQ(ZSome, ConstantRange(Some.getLower().zext(20),
193                                 Some.getUpper().zext(20)));
194  EXPECT_EQ(ZWrap, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
195
196  // zext([5, 0), 3->7) = [5, 8)
197  ConstantRange FiveZero(APInt(3, 5), APInt(3, 0));
198  EXPECT_EQ(FiveZero.zeroExtend(7), ConstantRange(APInt(7, 5), APInt(7, 8)));
199}
200
201TEST_F(ConstantRangeTest, SExt) {
202  ConstantRange SFull = Full.signExtend(20);
203  ConstantRange SEmpty = Empty.signExtend(20);
204  ConstantRange SOne = One.signExtend(20);
205  ConstantRange SSome = Some.signExtend(20);
206  ConstantRange SWrap = Wrap.signExtend(20);
207  EXPECT_EQ(SFull, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
208                                 APInt(20, INT16_MAX + 1, true)));
209  EXPECT_TRUE(SEmpty.isEmptySet());
210  EXPECT_EQ(SOne, ConstantRange(One.getLower().sext(20),
211                                One.getUpper().sext(20)));
212  EXPECT_EQ(SSome, ConstantRange(Some.getLower().sext(20),
213                                 Some.getUpper().sext(20)));
214  EXPECT_EQ(SWrap, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
215                                 APInt(20, INT16_MAX + 1, true)));
216
217  EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, 140)).signExtend(16),
218            ConstantRange(APInt(16, -128), APInt(16, 128)));
219
220  EXPECT_EQ(ConstantRange(APInt(16, 0x0200), APInt(16, 0x8000)).signExtend(19),
221            ConstantRange(APInt(19, 0x0200), APInt(19, 0x8000)));
222}
223
224TEST_F(ConstantRangeTest, IntersectWith) {
225  EXPECT_EQ(Empty.intersectWith(Full), Empty);
226  EXPECT_EQ(Empty.intersectWith(Empty), Empty);
227  EXPECT_EQ(Empty.intersectWith(One), Empty);
228  EXPECT_EQ(Empty.intersectWith(Some), Empty);
229  EXPECT_EQ(Empty.intersectWith(Wrap), Empty);
230  EXPECT_EQ(Full.intersectWith(Full), Full);
231  EXPECT_EQ(Some.intersectWith(Some), Some);
232  EXPECT_EQ(Some.intersectWith(One), One);
233  EXPECT_EQ(Full.intersectWith(One), One);
234  EXPECT_EQ(Full.intersectWith(Some), Some);
235  EXPECT_EQ(Some.intersectWith(Wrap), Empty);
236  EXPECT_EQ(One.intersectWith(Wrap), Empty);
237  EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One));
238
239  // Klee generated testcase from PR4545.
240  // The intersection of i16 [4, 2) and [6, 5) is disjoint, looking like
241  // 01..4.6789ABCDEF where the dots represent values not in the intersection.
242  ConstantRange LHS(APInt(16, 4), APInt(16, 2));
243  ConstantRange RHS(APInt(16, 6), APInt(16, 5));
244  EXPECT_TRUE(LHS.intersectWith(RHS) == LHS);
245
246  // previous bug: intersection of [min, 3) and [2, max) should be 2
247  LHS = ConstantRange(APInt(32, -2147483646), APInt(32, 3));
248  RHS = ConstantRange(APInt(32, 2), APInt(32, 2147483646));
249  EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2)));
250
251  // [2, 0) /\ [4, 3) = [2, 0)
252  LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
253  RHS = ConstantRange(APInt(32, 4), APInt(32, 3));
254  EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2), APInt(32, 0)));
255
256  // [2, 0) /\ [4, 2) = [4, 0)
257  LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
258  RHS = ConstantRange(APInt(32, 4), APInt(32, 2));
259  EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 0)));
260
261  // [4, 2) /\ [5, 1) = [5, 1)
262  LHS = ConstantRange(APInt(32, 4), APInt(32, 2));
263  RHS = ConstantRange(APInt(32, 5), APInt(32, 1));
264  EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 5), APInt(32, 1)));
265
266  // [2, 0) /\ [7, 4) = [7, 4)
267  LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
268  RHS = ConstantRange(APInt(32, 7), APInt(32, 4));
269  EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 7), APInt(32, 4)));
270
271  // [4, 2) /\ [1, 0) = [1, 0)
272  LHS = ConstantRange(APInt(32, 4), APInt(32, 2));
273  RHS = ConstantRange(APInt(32, 1), APInt(32, 0));
274  EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 2)));
275
276  // [15, 0) /\ [7, 6) = [15, 0)
277  LHS = ConstantRange(APInt(32, 15), APInt(32, 0));
278  RHS = ConstantRange(APInt(32, 7), APInt(32, 6));
279  EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 15), APInt(32, 0)));
280}
281
282TEST_F(ConstantRangeTest, UnionWith) {
283  EXPECT_EQ(Wrap.unionWith(One),
284            ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb)));
285  EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One));
286  EXPECT_EQ(Empty.unionWith(Empty), Empty);
287  EXPECT_EQ(Full.unionWith(Full), Full);
288  EXPECT_EQ(Some.unionWith(Wrap), Full);
289
290  // PR4545
291  EXPECT_EQ(ConstantRange(APInt(16, 14), APInt(16, 1)).unionWith(
292                                    ConstantRange(APInt(16, 0), APInt(16, 8))),
293            ConstantRange(APInt(16, 14), APInt(16, 8)));
294  EXPECT_EQ(ConstantRange(APInt(16, 6), APInt(16, 4)).unionWith(
295                                    ConstantRange(APInt(16, 4), APInt(16, 0))),
296              ConstantRange(16));
297  EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 0)).unionWith(
298                                    ConstantRange(APInt(16, 2), APInt(16, 1))),
299              ConstantRange(16));
300}
301
302TEST_F(ConstantRangeTest, SetDifference) {
303  EXPECT_EQ(Full.difference(Empty), Full);
304  EXPECT_EQ(Full.difference(Full), Empty);
305  EXPECT_EQ(Empty.difference(Empty), Empty);
306  EXPECT_EQ(Empty.difference(Full), Empty);
307
308  ConstantRange A(APInt(16, 3), APInt(16, 7));
309  ConstantRange B(APInt(16, 5), APInt(16, 9));
310  ConstantRange C(APInt(16, 3), APInt(16, 5));
311  ConstantRange D(APInt(16, 7), APInt(16, 9));
312  ConstantRange E(APInt(16, 5), APInt(16, 4));
313  ConstantRange F(APInt(16, 7), APInt(16, 3));
314  EXPECT_EQ(A.difference(B), C);
315  EXPECT_EQ(B.difference(A), D);
316  EXPECT_EQ(E.difference(A), F);
317}
318
319TEST_F(ConstantRangeTest, SubtractAPInt) {
320  EXPECT_EQ(Full.subtract(APInt(16, 4)), Full);
321  EXPECT_EQ(Empty.subtract(APInt(16, 4)), Empty);
322  EXPECT_EQ(Some.subtract(APInt(16, 4)),
323            ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
324  EXPECT_EQ(Wrap.subtract(APInt(16, 4)),
325            ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
326  EXPECT_EQ(One.subtract(APInt(16, 4)),
327            ConstantRange(APInt(16, 0x6)));
328}
329
330TEST_F(ConstantRangeTest, Add) {
331  EXPECT_EQ(Full.add(APInt(16, 4)), Full);
332  EXPECT_EQ(Full.add(Full), Full);
333  EXPECT_EQ(Full.add(Empty), Empty);
334  EXPECT_EQ(Full.add(One), Full);
335  EXPECT_EQ(Full.add(Some), Full);
336  EXPECT_EQ(Full.add(Wrap), Full);
337  EXPECT_EQ(Empty.add(Empty), Empty);
338  EXPECT_EQ(Empty.add(One), Empty);
339  EXPECT_EQ(Empty.add(Some), Empty);
340  EXPECT_EQ(Empty.add(Wrap), Empty);
341  EXPECT_EQ(Empty.add(APInt(16, 4)), Empty);
342  EXPECT_EQ(Some.add(APInt(16, 4)),
343            ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
344  EXPECT_EQ(Wrap.add(APInt(16, 4)),
345            ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
346  EXPECT_EQ(One.add(APInt(16, 4)),
347            ConstantRange(APInt(16, 0xe)));
348}
349
350TEST_F(ConstantRangeTest, Sub) {
351  EXPECT_EQ(Full.sub(APInt(16, 4)), Full);
352  EXPECT_EQ(Full.sub(Full), Full);
353  EXPECT_EQ(Full.sub(Empty), Empty);
354  EXPECT_EQ(Full.sub(One), Full);
355  EXPECT_EQ(Full.sub(Some), Full);
356  EXPECT_EQ(Full.sub(Wrap), Full);
357  EXPECT_EQ(Empty.sub(Empty), Empty);
358  EXPECT_EQ(Empty.sub(One), Empty);
359  EXPECT_EQ(Empty.sub(Some), Empty);
360  EXPECT_EQ(Empty.sub(Wrap), Empty);
361  EXPECT_EQ(Empty.sub(APInt(16, 4)), Empty);
362  EXPECT_EQ(Some.sub(APInt(16, 4)),
363            ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
364  EXPECT_EQ(Some.sub(Some),
365            ConstantRange(APInt(16, 0xf561), APInt(16, 0xaa0)));
366  EXPECT_EQ(Wrap.sub(APInt(16, 4)),
367            ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
368  EXPECT_EQ(One.sub(APInt(16, 4)),
369            ConstantRange(APInt(16, 0x6)));
370}
371
372TEST_F(ConstantRangeTest, Multiply) {
373  EXPECT_EQ(Full.multiply(Full), Full);
374  EXPECT_EQ(Full.multiply(Empty), Empty);
375  EXPECT_EQ(Full.multiply(One), Full);
376  EXPECT_EQ(Full.multiply(Some), Full);
377  EXPECT_EQ(Full.multiply(Wrap), Full);
378  EXPECT_EQ(Empty.multiply(Empty), Empty);
379  EXPECT_EQ(Empty.multiply(One), Empty);
380  EXPECT_EQ(Empty.multiply(Some), Empty);
381  EXPECT_EQ(Empty.multiply(Wrap), Empty);
382  EXPECT_EQ(One.multiply(One), ConstantRange(APInt(16, 0xa*0xa),
383                                             APInt(16, 0xa*0xa + 1)));
384  EXPECT_EQ(One.multiply(Some), ConstantRange(APInt(16, 0xa*0xa),
385                                              APInt(16, 0xa*0xaa9 + 1)));
386  EXPECT_EQ(One.multiply(Wrap), Full);
387  EXPECT_EQ(Some.multiply(Some), Full);
388  EXPECT_EQ(Some.multiply(Wrap), Full);
389  EXPECT_EQ(Wrap.multiply(Wrap), Full);
390
391  ConstantRange Zero(APInt(16, 0));
392  EXPECT_EQ(Zero.multiply(Full), Zero);
393  EXPECT_EQ(Zero.multiply(Some), Zero);
394  EXPECT_EQ(Zero.multiply(Wrap), Zero);
395  EXPECT_EQ(Full.multiply(Zero), Zero);
396  EXPECT_EQ(Some.multiply(Zero), Zero);
397  EXPECT_EQ(Wrap.multiply(Zero), Zero);
398
399  // http://llvm.org/PR4545
400  EXPECT_EQ(ConstantRange(APInt(4, 1), APInt(4, 6)).multiply(
401                ConstantRange(APInt(4, 6), APInt(4, 2))),
402            ConstantRange(4, /*isFullSet=*/true));
403}
404
405TEST_F(ConstantRangeTest, UMax) {
406  EXPECT_EQ(Full.umax(Full), Full);
407  EXPECT_EQ(Full.umax(Empty), Empty);
408  EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
409  EXPECT_EQ(Full.umax(Wrap), Full);
410  EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
411  EXPECT_EQ(Empty.umax(Empty), Empty);
412  EXPECT_EQ(Empty.umax(Some), Empty);
413  EXPECT_EQ(Empty.umax(Wrap), Empty);
414  EXPECT_EQ(Empty.umax(One), Empty);
415  EXPECT_EQ(Some.umax(Some), Some);
416  EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
417  EXPECT_EQ(Some.umax(One), Some);
418  // TODO: ConstantRange is currently over-conservative here.
419  EXPECT_EQ(Wrap.umax(Wrap), Full);
420  EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
421  EXPECT_EQ(One.umax(One), One);
422}
423
424TEST_F(ConstantRangeTest, SMax) {
425  EXPECT_EQ(Full.smax(Full), Full);
426  EXPECT_EQ(Full.smax(Empty), Empty);
427  EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa),
428                                           APInt::getSignedMinValue(16)));
429  EXPECT_EQ(Full.smax(Wrap), Full);
430  EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa),
431                                          APInt::getSignedMinValue(16)));
432  EXPECT_EQ(Empty.smax(Empty), Empty);
433  EXPECT_EQ(Empty.smax(Some), Empty);
434  EXPECT_EQ(Empty.smax(Wrap), Empty);
435  EXPECT_EQ(Empty.smax(One), Empty);
436  EXPECT_EQ(Some.smax(Some), Some);
437  EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa),
438                                           APInt(16, (uint64_t)INT16_MIN)));
439  EXPECT_EQ(Some.smax(One), Some);
440  EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
441                                          APInt(16, (uint64_t)INT16_MIN)));
442  EXPECT_EQ(One.smax(One), One);
443}
444
445TEST_F(ConstantRangeTest, UDiv) {
446  EXPECT_EQ(Full.udiv(Full), Full);
447  EXPECT_EQ(Full.udiv(Empty), Empty);
448  EXPECT_EQ(Full.udiv(One), ConstantRange(APInt(16, 0),
449                                          APInt(16, 0xffff / 0xa + 1)));
450  EXPECT_EQ(Full.udiv(Some), ConstantRange(APInt(16, 0),
451                                           APInt(16, 0xffff / 0xa + 1)));
452  EXPECT_EQ(Full.udiv(Wrap), Full);
453  EXPECT_EQ(Empty.udiv(Empty), Empty);
454  EXPECT_EQ(Empty.udiv(One), Empty);
455  EXPECT_EQ(Empty.udiv(Some), Empty);
456  EXPECT_EQ(Empty.udiv(Wrap), Empty);
457  EXPECT_EQ(One.udiv(One), ConstantRange(APInt(16, 1)));
458  EXPECT_EQ(One.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 2)));
459  EXPECT_EQ(One.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
460  EXPECT_EQ(Some.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 0x111)));
461  EXPECT_EQ(Some.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
462  EXPECT_EQ(Wrap.udiv(Wrap), Full);
463}
464
465TEST_F(ConstantRangeTest, Shl) {
466  EXPECT_EQ(Full.shl(Full), Full);
467  EXPECT_EQ(Full.shl(Empty), Empty);
468  EXPECT_EQ(Full.shl(One), Full);    // TODO: [0, (-1 << 0xa) + 1)
469  EXPECT_EQ(Full.shl(Some), Full);   // TODO: [0, (-1 << 0xa) + 1)
470  EXPECT_EQ(Full.shl(Wrap), Full);
471  EXPECT_EQ(Empty.shl(Empty), Empty);
472  EXPECT_EQ(Empty.shl(One), Empty);
473  EXPECT_EQ(Empty.shl(Some), Empty);
474  EXPECT_EQ(Empty.shl(Wrap), Empty);
475  EXPECT_EQ(One.shl(One), ConstantRange(APInt(16, 0xa << 0xa),
476                                        APInt(16, (0xa << 0xa) + 1)));
477  EXPECT_EQ(One.shl(Some), Full);    // TODO: [0xa << 0xa, 0)
478  EXPECT_EQ(One.shl(Wrap), Full);    // TODO: [0xa, 0xa << 14 + 1)
479  EXPECT_EQ(Some.shl(Some), Full);   // TODO: [0xa << 0xa, 0xfc01)
480  EXPECT_EQ(Some.shl(Wrap), Full);   // TODO: [0xa, 0x7ff << 0x5 + 1)
481  EXPECT_EQ(Wrap.shl(Wrap), Full);
482}
483
484TEST_F(ConstantRangeTest, Lshr) {
485  EXPECT_EQ(Full.lshr(Full), Full);
486  EXPECT_EQ(Full.lshr(Empty), Empty);
487  EXPECT_EQ(Full.lshr(One), ConstantRange(APInt(16, 0),
488                                          APInt(16, (0xffff >> 0xa) + 1)));
489  EXPECT_EQ(Full.lshr(Some), ConstantRange(APInt(16, 0),
490                                           APInt(16, (0xffff >> 0xa) + 1)));
491  EXPECT_EQ(Full.lshr(Wrap), Full);
492  EXPECT_EQ(Empty.lshr(Empty), Empty);
493  EXPECT_EQ(Empty.lshr(One), Empty);
494  EXPECT_EQ(Empty.lshr(Some), Empty);
495  EXPECT_EQ(Empty.lshr(Wrap), Empty);
496  EXPECT_EQ(One.lshr(One), ConstantRange(APInt(16, 0)));
497  EXPECT_EQ(One.lshr(Some), ConstantRange(APInt(16, 0)));
498  EXPECT_EQ(One.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
499  EXPECT_EQ(Some.lshr(Some), ConstantRange(APInt(16, 0),
500                                           APInt(16, (0xaaa >> 0xa) + 1)));
501  EXPECT_EQ(Some.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
502  EXPECT_EQ(Wrap.lshr(Wrap), Full);
503}
504
505TEST(ConstantRange, MakeICmpRegion) {
506  // PR8250
507  ConstantRange SMax = ConstantRange(APInt::getSignedMaxValue(32));
508  EXPECT_TRUE(ConstantRange::makeICmpRegion(ICmpInst::ICMP_SGT,
509                                            SMax).isEmptySet());
510}
511
512}  // anonymous namespace
513