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[MIParser] Set RegClassOrRegBank during instruction parsing
[llvm-complete.git] / unittests / IR / ConstantRangeTest.cpp
blob742c5fa9fd9012dd17d6b872bd63511c68425682
1 //===- ConstantRangeTest.cpp - ConstantRange tests ------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/ADT/BitVector.h"
10 #include "llvm/IR/ConstantRange.h"
11 #include "llvm/IR/Instructions.h"
12 #include "llvm/IR/Operator.h"
13 #include "llvm/Support/KnownBits.h"
14 #include "gtest/gtest.h"
15
16 using namespace llvm;
17
18 namespace {
19
20 class ConstantRangeTest : public ::testing::Test {
21 protected:
22 static ConstantRange Full;
23 static ConstantRange Empty;
24 static ConstantRange One;
25 static ConstantRange Some;
26 static ConstantRange Wrap;
27 };
28
29 template<typename Fn>
30 static void EnumerateConstantRanges(unsigned Bits, Fn TestFn) {
31 unsigned Max = 1 << Bits;
32 for (unsigned Lo = 0; Lo < Max; Lo++) {
33 for (unsigned Hi = 0; Hi < Max; Hi++) {
34 // Enforce ConstantRange invariant.
35 if (Lo == Hi && Lo != 0 && Lo != Max - 1)
36 continue;
37
38 ConstantRange CR(APInt(Bits, Lo), APInt(Bits, Hi));
39 TestFn(CR);
40 }
41 }
42 }
43
44 template<typename Fn>
45 static void EnumerateTwoConstantRanges(unsigned Bits, Fn TestFn) {
46 EnumerateConstantRanges(Bits, [&](const ConstantRange &CR1) {
47 EnumerateConstantRanges(Bits, [&](const ConstantRange &CR2) {
48 TestFn(CR1, CR2);
49 });
50 });
51 }
52
53 template<typename Fn>
54 static void ForeachNumInConstantRange(const ConstantRange &CR, Fn TestFn) {
55 if (!CR.isEmptySet()) {
56 APInt N = CR.getLower();
57 do TestFn(N);
58 while (++N != CR.getUpper());
59 }
60 }
61
62 template<typename Fn1, typename Fn2>
63 static void TestUnsignedBinOpExhaustive(
64 Fn1 RangeFn, Fn2 IntFn,
65 bool SkipZeroRHS = false, bool CorrectnessOnly = false) {
66 unsigned Bits = 4;
67 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1,
68 const ConstantRange &CR2) {
69 APInt Min = APInt::getMaxValue(Bits);
70 APInt Max = APInt::getMinValue(Bits);
71 ForeachNumInConstantRange(CR1, [&](const APInt &N1) {
72 ForeachNumInConstantRange(CR2, [&](const APInt &N2) {
73 if (SkipZeroRHS && N2 == 0)
74 return;
75
76 APInt N = IntFn(N1, N2);
77 if (N.ult(Min))
78 Min = N;
79 if (N.ugt(Max))
80 Max = N;
81 });
82 });
83
84 ConstantRange CR = RangeFn(CR1, CR2);
85 if (Min.ugt(Max)) {
86 EXPECT_TRUE(CR.isEmptySet());
87 return;
88 }
89
90 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1);
91 if (CorrectnessOnly) {
92 EXPECT_TRUE(CR.contains(Exact));
93 } else {
94 EXPECT_EQ(Exact, CR);
95 }
96 });
97 }
98
99 template<typename Fn1, typename Fn2>
100 static void TestSignedBinOpExhaustive(
101 Fn1 RangeFn, Fn2 IntFn,
102 bool SkipZeroRHS = false, bool CorrectnessOnly = false) {
103 unsigned Bits = 4;
104 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1,
105 const ConstantRange &CR2) {
106 APInt Min = APInt::getSignedMaxValue(Bits);
107 APInt Max = APInt::getSignedMinValue(Bits);
108 ForeachNumInConstantRange(CR1, [&](const APInt &N1) {
109 ForeachNumInConstantRange(CR2, [&](const APInt &N2) {
110 if (SkipZeroRHS && N2 == 0)
111 return;
112
113 APInt N = IntFn(N1, N2);
114 if (N.slt(Min))
115 Min = N;
116 if (N.sgt(Max))
117 Max = N;
118 });
119 });
120
121 ConstantRange CR = RangeFn(CR1, CR2);
122 if (Min.sgt(Max)) {
123 EXPECT_TRUE(CR.isEmptySet());
124 return;
125 }
126
127 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1);
128 if (CorrectnessOnly) {
129 EXPECT_TRUE(CR.contains(Exact));
130 } else {
131 EXPECT_EQ(Exact, CR);
132 }
133 });
134 }
135
136 ConstantRange ConstantRangeTest::Full(16, true);
137 ConstantRange ConstantRangeTest::Empty(16, false);
138 ConstantRange ConstantRangeTest::One(APInt(16, 0xa));
139 ConstantRange ConstantRangeTest::Some(APInt(16, 0xa), APInt(16, 0xaaa));
140 ConstantRange ConstantRangeTest::Wrap(APInt(16, 0xaaa), APInt(16, 0xa));
141
142 TEST_F(ConstantRangeTest, Basics) {
143 EXPECT_TRUE(Full.isFullSet());
144 EXPECT_FALSE(Full.isEmptySet());
145 EXPECT_TRUE(Full.inverse().isEmptySet());
146 EXPECT_FALSE(Full.isWrappedSet());
147 EXPECT_TRUE(Full.contains(APInt(16, 0x0)));
148 EXPECT_TRUE(Full.contains(APInt(16, 0x9)));
149 EXPECT_TRUE(Full.contains(APInt(16, 0xa)));
150 EXPECT_TRUE(Full.contains(APInt(16, 0xaa9)));
151 EXPECT_TRUE(Full.contains(APInt(16, 0xaaa)));
152
153 EXPECT_FALSE(Empty.isFullSet());
154 EXPECT_TRUE(Empty.isEmptySet());
155 EXPECT_TRUE(Empty.inverse().isFullSet());
156 EXPECT_FALSE(Empty.isWrappedSet());
157 EXPECT_FALSE(Empty.contains(APInt(16, 0x0)));
158 EXPECT_FALSE(Empty.contains(APInt(16, 0x9)));
159 EXPECT_FALSE(Empty.contains(APInt(16, 0xa)));
160 EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9)));
161 EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa)));
162
163 EXPECT_FALSE(One.isFullSet());
164 EXPECT_FALSE(One.isEmptySet());
165 EXPECT_FALSE(One.isWrappedSet());
166 EXPECT_FALSE(One.contains(APInt(16, 0x0)));
167 EXPECT_FALSE(One.contains(APInt(16, 0x9)));
168 EXPECT_TRUE(One.contains(APInt(16, 0xa)));
169 EXPECT_FALSE(One.contains(APInt(16, 0xaa9)));
170 EXPECT_FALSE(One.contains(APInt(16, 0xaaa)));
171 EXPECT_FALSE(One.inverse().contains(APInt(16, 0xa)));
172
173 EXPECT_FALSE(Some.isFullSet());
174 EXPECT_FALSE(Some.isEmptySet());
175 EXPECT_FALSE(Some.isWrappedSet());
176 EXPECT_FALSE(Some.contains(APInt(16, 0x0)));
177 EXPECT_FALSE(Some.contains(APInt(16, 0x9)));
178 EXPECT_TRUE(Some.contains(APInt(16, 0xa)));
179 EXPECT_TRUE(Some.contains(APInt(16, 0xaa9)));
180 EXPECT_FALSE(Some.contains(APInt(16, 0xaaa)));
181
182 EXPECT_FALSE(Wrap.isFullSet());
183 EXPECT_FALSE(Wrap.isEmptySet());
184 EXPECT_TRUE(Wrap.isWrappedSet());
185 EXPECT_TRUE(Wrap.contains(APInt(16, 0x0)));
186 EXPECT_TRUE(Wrap.contains(APInt(16, 0x9)));
187 EXPECT_FALSE(Wrap.contains(APInt(16, 0xa)));
188 EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9)));
189 EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa)));
190 }
191
192 TEST_F(ConstantRangeTest, Equality) {
193 EXPECT_EQ(Full, Full);
194 EXPECT_EQ(Empty, Empty);
195 EXPECT_EQ(One, One);
196 EXPECT_EQ(Some, Some);
197 EXPECT_EQ(Wrap, Wrap);
198 EXPECT_NE(Full, Empty);
199 EXPECT_NE(Full, One);
200 EXPECT_NE(Full, Some);
201 EXPECT_NE(Full, Wrap);
202 EXPECT_NE(Empty, One);
203 EXPECT_NE(Empty, Some);
204 EXPECT_NE(Empty, Wrap);
205 EXPECT_NE(One, Some);
206 EXPECT_NE(One, Wrap);
207 EXPECT_NE(Some, Wrap);
208 }
209
210 TEST_F(ConstantRangeTest, SingleElement) {
211 EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(nullptr));
212 EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(nullptr));
213 EXPECT_EQ(Full.getSingleMissingElement(), static_cast<APInt *>(nullptr));
214 EXPECT_EQ(Empty.getSingleMissingElement(), static_cast<APInt *>(nullptr));
215
216 EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa));
217 EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(nullptr));
218 EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(nullptr));
219
220 EXPECT_EQ(One.getSingleMissingElement(), static_cast<APInt *>(nullptr));
221 EXPECT_EQ(Some.getSingleMissingElement(), static_cast<APInt *>(nullptr));
222
223 ConstantRange OneInverse = One.inverse();
224 EXPECT_EQ(*OneInverse.getSingleMissingElement(), *One.getSingleElement());
225
226 EXPECT_FALSE(Full.isSingleElement());
227 EXPECT_FALSE(Empty.isSingleElement());
228 EXPECT_TRUE(One.isSingleElement());
229 EXPECT_FALSE(Some.isSingleElement());
230 EXPECT_FALSE(Wrap.isSingleElement());
231 }
232
233 TEST_F(ConstantRangeTest, GetMinsAndMaxes) {
234 EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX));
235 EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa));
236 EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9));
237 EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX));
238
239 EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0));
240 EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa));
241 EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa));
242 EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0));
243
244 EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX));
245 EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa));
246 EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9));
247 EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX));
248
249 EXPECT_EQ(Full.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
250 EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa));
251 EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa));
252 EXPECT_EQ(Wrap.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
253
254 // Found by Klee
255 EXPECT_EQ(ConstantRange(APInt(4, 7), APInt(4, 0)).getSignedMax(),
256 APInt(4, 7));
257 }
258
259 TEST_F(ConstantRangeTest, SignWrapped) {
260 EXPECT_FALSE(Full.isSignWrappedSet());
261 EXPECT_FALSE(Empty.isSignWrappedSet());
262 EXPECT_FALSE(One.isSignWrappedSet());
263 EXPECT_FALSE(Some.isSignWrappedSet());
264 EXPECT_TRUE(Wrap.isSignWrappedSet());
265
266 EXPECT_FALSE(ConstantRange(APInt(8, 127), APInt(8, 128)).isSignWrappedSet());
267 EXPECT_TRUE(ConstantRange(APInt(8, 127), APInt(8, 129)).isSignWrappedSet());
268 EXPECT_FALSE(ConstantRange(APInt(8, 128), APInt(8, 129)).isSignWrappedSet());
269 EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 9)).isSignWrappedSet());
270 EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 250)).isSignWrappedSet());
271 EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 10)).isSignWrappedSet());
272 EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 251)).isSignWrappedSet());
273 }
274
275 TEST_F(ConstantRangeTest, UpperWrapped) {
276 // The behavior here is the same as for isWrappedSet() / isSignWrappedSet().
277 EXPECT_FALSE(Full.isUpperWrapped());
278 EXPECT_FALSE(Empty.isUpperWrapped());
279 EXPECT_FALSE(One.isUpperWrapped());
280 EXPECT_FALSE(Some.isUpperWrapped());
281 EXPECT_TRUE(Wrap.isUpperWrapped());
282 EXPECT_FALSE(Full.isUpperSignWrapped());
283 EXPECT_FALSE(Empty.isUpperSignWrapped());
284 EXPECT_FALSE(One.isUpperSignWrapped());
285 EXPECT_FALSE(Some.isUpperSignWrapped());
286 EXPECT_TRUE(Wrap.isUpperSignWrapped());
287
288 // The behavior differs if Upper is the Min/SignedMin value.
289 ConstantRange CR1(APInt(8, 42), APInt::getMinValue(8));
290 EXPECT_FALSE(CR1.isWrappedSet());
291 EXPECT_TRUE(CR1.isUpperWrapped());
292
293 ConstantRange CR2(APInt(8, 42), APInt::getSignedMinValue(8));
294 EXPECT_FALSE(CR2.isSignWrappedSet());
295 EXPECT_TRUE(CR2.isUpperSignWrapped());
296 }
297
298 TEST_F(ConstantRangeTest, Trunc) {
299 ConstantRange TFull = Full.truncate(10);
300 ConstantRange TEmpty = Empty.truncate(10);
301 ConstantRange TOne = One.truncate(10);
302 ConstantRange TSome = Some.truncate(10);
303 ConstantRange TWrap = Wrap.truncate(10);
304 EXPECT_TRUE(TFull.isFullSet());
305 EXPECT_TRUE(TEmpty.isEmptySet());
306 EXPECT_EQ(TOne, ConstantRange(One.getLower().trunc(10),
307 One.getUpper().trunc(10)));
308 EXPECT_TRUE(TSome.isFullSet());
309 EXPECT_TRUE(TWrap.isFullSet());
310
311 // trunc([2, 5), 3->2) = [2, 1)
312 ConstantRange TwoFive(APInt(3, 2), APInt(3, 5));
313 EXPECT_EQ(TwoFive.truncate(2), ConstantRange(APInt(2, 2), APInt(2, 1)));
314
315 // trunc([2, 6), 3->2) = full
316 ConstantRange TwoSix(APInt(3, 2), APInt(3, 6));
317 EXPECT_TRUE(TwoSix.truncate(2).isFullSet());
318
319 // trunc([5, 7), 3->2) = [1, 3)
320 ConstantRange FiveSeven(APInt(3, 5), APInt(3, 7));
321 EXPECT_EQ(FiveSeven.truncate(2), ConstantRange(APInt(2, 1), APInt(2, 3)));
322
323 // trunc([7, 1), 3->2) = [3, 1)
324 ConstantRange SevenOne(APInt(3, 7), APInt(3, 1));
325 EXPECT_EQ(SevenOne.truncate(2), ConstantRange(APInt(2, 3), APInt(2, 1)));
326 }
327
328 TEST_F(ConstantRangeTest, ZExt) {
329 ConstantRange ZFull = Full.zeroExtend(20);
330 ConstantRange ZEmpty = Empty.zeroExtend(20);
331 ConstantRange ZOne = One.zeroExtend(20);
332 ConstantRange ZSome = Some.zeroExtend(20);
333 ConstantRange ZWrap = Wrap.zeroExtend(20);
334 EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
335 EXPECT_TRUE(ZEmpty.isEmptySet());
336 EXPECT_EQ(ZOne, ConstantRange(One.getLower().zext(20),
337 One.getUpper().zext(20)));
338 EXPECT_EQ(ZSome, ConstantRange(Some.getLower().zext(20),
339 Some.getUpper().zext(20)));
340 EXPECT_EQ(ZWrap, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
341
342 // zext([5, 0), 3->7) = [5, 8)
343 ConstantRange FiveZero(APInt(3, 5), APInt(3, 0));
344 EXPECT_EQ(FiveZero.zeroExtend(7), ConstantRange(APInt(7, 5), APInt(7, 8)));
345 }
346
347 TEST_F(ConstantRangeTest, SExt) {
348 ConstantRange SFull = Full.signExtend(20);
349 ConstantRange SEmpty = Empty.signExtend(20);
350 ConstantRange SOne = One.signExtend(20);
351 ConstantRange SSome = Some.signExtend(20);
352 ConstantRange SWrap = Wrap.signExtend(20);
353 EXPECT_EQ(SFull, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
354 APInt(20, INT16_MAX + 1, true)));
355 EXPECT_TRUE(SEmpty.isEmptySet());
356 EXPECT_EQ(SOne, ConstantRange(One.getLower().sext(20),
357 One.getUpper().sext(20)));
358 EXPECT_EQ(SSome, ConstantRange(Some.getLower().sext(20),
359 Some.getUpper().sext(20)));
360 EXPECT_EQ(SWrap, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
361 APInt(20, INT16_MAX + 1, true)));
362
363 EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, 140)).signExtend(16),
364 ConstantRange(APInt(16, -128), APInt(16, 128)));
365
366 EXPECT_EQ(ConstantRange(APInt(16, 0x0200), APInt(16, 0x8000)).signExtend(19),
367 ConstantRange(APInt(19, 0x0200), APInt(19, 0x8000)));
368 }
369
370 TEST_F(ConstantRangeTest, IntersectWith) {
371 EXPECT_EQ(Empty.intersectWith(Full), Empty);
372 EXPECT_EQ(Empty.intersectWith(Empty), Empty);
373 EXPECT_EQ(Empty.intersectWith(One), Empty);
374 EXPECT_EQ(Empty.intersectWith(Some), Empty);
375 EXPECT_EQ(Empty.intersectWith(Wrap), Empty);
376 EXPECT_EQ(Full.intersectWith(Full), Full);
377 EXPECT_EQ(Some.intersectWith(Some), Some);
378 EXPECT_EQ(Some.intersectWith(One), One);
379 EXPECT_EQ(Full.intersectWith(One), One);
380 EXPECT_EQ(Full.intersectWith(Some), Some);
381 EXPECT_EQ(Some.intersectWith(Wrap), Empty);
382 EXPECT_EQ(One.intersectWith(Wrap), Empty);
383 EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One));
384
385 // Klee generated testcase from PR4545.
386 // The intersection of i16 [4, 2) and [6, 5) is disjoint, looking like
387 // 01..4.6789ABCDEF where the dots represent values not in the intersection.
388 ConstantRange LHS(APInt(16, 4), APInt(16, 2));
389 ConstantRange RHS(APInt(16, 6), APInt(16, 5));
390 EXPECT_TRUE(LHS.intersectWith(RHS) == LHS);
391
392 // previous bug: intersection of [min, 3) and [2, max) should be 2
393 LHS = ConstantRange(APInt(32, -2147483646), APInt(32, 3));
394 RHS = ConstantRange(APInt(32, 2), APInt(32, 2147483646));
395 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2)));
396
397 // [2, 0) /\ [4, 3) = [2, 0)
398 LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
399 RHS = ConstantRange(APInt(32, 4), APInt(32, 3));
400 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2), APInt(32, 0)));
401
402 // [2, 0) /\ [4, 2) = [4, 0)
403 LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
404 RHS = ConstantRange(APInt(32, 4), APInt(32, 2));
405 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 0)));
406
407 // [4, 2) /\ [5, 1) = [5, 1)
408 LHS = ConstantRange(APInt(32, 4), APInt(32, 2));
409 RHS = ConstantRange(APInt(32, 5), APInt(32, 1));
410 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 5), APInt(32, 1)));
411
412 // [2, 0) /\ [7, 4) = [7, 4)
413 LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
414 RHS = ConstantRange(APInt(32, 7), APInt(32, 4));
415 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 7), APInt(32, 4)));
416
417 // [4, 2) /\ [1, 0) = [1, 0)
418 LHS = ConstantRange(APInt(32, 4), APInt(32, 2));
419 RHS = ConstantRange(APInt(32, 1), APInt(32, 0));
420 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 2)));
421
422 // [15, 0) /\ [7, 6) = [15, 0)
423 LHS = ConstantRange(APInt(32, 15), APInt(32, 0));
424 RHS = ConstantRange(APInt(32, 7), APInt(32, 6));
425 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 15), APInt(32, 0)));
426 }
427
428 template<typename Fn1, typename Fn2>
429 void testBinarySetOperationExhaustive(Fn1 OpFn, Fn2 InResultFn) {
430 unsigned Bits = 4;
431 EnumerateTwoConstantRanges(Bits,
432 [=](const ConstantRange &CR1, const ConstantRange &CR2) {
433 // Collect up to three contiguous unsigned ranges. The HaveInterrupt
434 // variables are used determine when we have to switch to the next
435 // range because the previous one ended.
436 APInt Lower1(Bits, 0), Upper1(Bits, 0);
437 APInt Lower2(Bits, 0), Upper2(Bits, 0);
438 APInt Lower3(Bits, 0), Upper3(Bits, 0);
439 bool HaveRange1 = false, HaveInterrupt1 = false;
440 bool HaveRange2 = false, HaveInterrupt2 = false;
441 bool HaveRange3 = false, HaveInterrupt3 = false;
442
443 APInt Num(Bits, 0);
444 for (unsigned I = 0, Limit = 1 << Bits; I < Limit; ++I, ++Num) {
445 if (!InResultFn(CR1, CR2, Num)) {
446 if (HaveRange3)
447 HaveInterrupt3 = true;
448 else if (HaveRange2)
449 HaveInterrupt2 = true;
450 else if (HaveRange1)
451 HaveInterrupt1 = true;
452 continue;
453 }
454
455 if (HaveRange3) {
456 Upper3 = Num;
457 } else if (HaveInterrupt2) {
458 HaveRange3 = true;
459 Lower3 = Upper3 = Num;
460 } else if (HaveRange2) {
461 Upper2 = Num;
462 } else if (HaveInterrupt1) {
463 HaveRange2 = true;
464 Lower2 = Upper2 = Num;
465 } else if (HaveRange1) {
466 Upper1 = Num;
467 } else {
468 HaveRange1 = true;
469 Lower1 = Upper1 = Num;
470 }
471 }
472
473 (void)HaveInterrupt3;
474 assert(!HaveInterrupt3 && "Should have at most three ranges");
475
476 ConstantRange SmallestCR = OpFn(CR1, CR2, ConstantRange::Smallest);
477 ConstantRange UnsignedCR = OpFn(CR1, CR2, ConstantRange::Unsigned);
478 ConstantRange SignedCR = OpFn(CR1, CR2, ConstantRange::Signed);
479
480 if (!HaveRange1) {
481 EXPECT_TRUE(SmallestCR.isEmptySet());
482 EXPECT_TRUE(UnsignedCR.isEmptySet());
483 EXPECT_TRUE(SignedCR.isEmptySet());
484 return;
485 }
486
487 if (!HaveRange2) {
488 if (Lower1 == Upper1 + 1) {
489 EXPECT_TRUE(SmallestCR.isFullSet());
490 EXPECT_TRUE(UnsignedCR.isFullSet());
491 EXPECT_TRUE(SignedCR.isFullSet());
492 } else {
493 ConstantRange Expected(Lower1, Upper1 + 1);
494 EXPECT_EQ(Expected, SmallestCR);
495 EXPECT_EQ(Expected, UnsignedCR);
496 EXPECT_EQ(Expected, SignedCR);
497 }
498 return;
499 }
500
501 ConstantRange Variant1(Bits, /*full*/ true);
502 ConstantRange Variant2(Bits, /*full*/ true);
503 if (!HaveRange3) {
504 // Compute the two possible ways to cover two disjoint ranges.
505 if (Lower1 != Upper2 + 1)
506 Variant1 = ConstantRange(Lower1, Upper2 + 1);
507 if (Lower2 != Upper1 + 1)
508 Variant2 = ConstantRange(Lower2, Upper1 + 1);
509 } else {
510 // If we have three ranges, the first and last one have to be adjacent
511 // to the unsigned domain. It's better to think of this as having two
512 // holes, and we can construct one range using each hole.
513 assert(Lower1.isNullValue() && Upper3.isMaxValue());
514 Variant1 = ConstantRange(Lower2, Upper1 + 1);
515 Variant2 = ConstantRange(Lower3, Upper2 + 1);
516 }
517
518 // Smallest: Smaller set, then any set.
519 if (Variant1.isSizeStrictlySmallerThan(Variant2))
520 EXPECT_EQ(Variant1, SmallestCR);
521 else if (Variant2.isSizeStrictlySmallerThan(Variant1))
522 EXPECT_EQ(Variant2, SmallestCR);
523 else
524 EXPECT_TRUE(Variant1 == SmallestCR || Variant2 == SmallestCR);
525
526 // Unsigned: Non-wrapped set, then smaller set, then any set.
527 bool Variant1Full = Variant1.isFullSet() || Variant1.isWrappedSet();
528 bool Variant2Full = Variant2.isFullSet() || Variant2.isWrappedSet();
529 if (!Variant1Full && Variant2Full)
530 EXPECT_EQ(Variant1, UnsignedCR);
531 else if (Variant1Full && !Variant2Full)
532 EXPECT_EQ(Variant2, UnsignedCR);
533 else if (Variant1.isSizeStrictlySmallerThan(Variant2))
534 EXPECT_EQ(Variant1, UnsignedCR);
535 else if (Variant2.isSizeStrictlySmallerThan(Variant1))
536 EXPECT_EQ(Variant2, UnsignedCR);
537 else
538 EXPECT_TRUE(Variant1 == UnsignedCR || Variant2 == UnsignedCR);
539
540 // Signed: Signed non-wrapped set, then smaller set, then any set.
541 Variant1Full = Variant1.isFullSet() || Variant1.isSignWrappedSet();
542 Variant2Full = Variant2.isFullSet() || Variant2.isSignWrappedSet();
543 if (!Variant1Full && Variant2Full)
544 EXPECT_EQ(Variant1, SignedCR);
545 else if (Variant1Full && !Variant2Full)
546 EXPECT_EQ(Variant2, SignedCR);
547 else if (Variant1.isSizeStrictlySmallerThan(Variant2))
548 EXPECT_EQ(Variant1, SignedCR);
549 else if (Variant2.isSizeStrictlySmallerThan(Variant1))
550 EXPECT_EQ(Variant2, SignedCR);
551 else
552 EXPECT_TRUE(Variant1 == SignedCR || Variant2 == SignedCR);
553 });
554 }
555
556 TEST_F(ConstantRangeTest, IntersectWithExhaustive) {
557 testBinarySetOperationExhaustive(
558 [](const ConstantRange &CR1, const ConstantRange &CR2,
559 ConstantRange::PreferredRangeType Type) {
560 return CR1.intersectWith(CR2, Type);
561 },
562 [](const ConstantRange &CR1, const ConstantRange &CR2, const APInt &N) {
563 return CR1.contains(N) && CR2.contains(N);
564 });
565 }
566
567 TEST_F(ConstantRangeTest, UnionWithExhaustive) {
568 testBinarySetOperationExhaustive(
569 [](const ConstantRange &CR1, const ConstantRange &CR2,
570 ConstantRange::PreferredRangeType Type) {
571 return CR1.unionWith(CR2, Type);
572 },
573 [](const ConstantRange &CR1, const ConstantRange &CR2, const APInt &N) {
574 return CR1.contains(N) || CR2.contains(N);
575 });
576 }
577
578 TEST_F(ConstantRangeTest, UnionWith) {
579 EXPECT_EQ(Wrap.unionWith(One),
580 ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb)));
581 EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One));
582 EXPECT_EQ(Empty.unionWith(Empty), Empty);
583 EXPECT_EQ(Full.unionWith(Full), Full);
584 EXPECT_EQ(Some.unionWith(Wrap), Full);
585
586 // PR4545
587 EXPECT_EQ(ConstantRange(APInt(16, 14), APInt(16, 1)).unionWith(
588 ConstantRange(APInt(16, 0), APInt(16, 8))),
589 ConstantRange(APInt(16, 14), APInt(16, 8)));
590 EXPECT_EQ(ConstantRange(APInt(16, 6), APInt(16, 4)).unionWith(
591 ConstantRange(APInt(16, 4), APInt(16, 0))),
592 ConstantRange::getFull(16));
593 EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 0)).unionWith(
594 ConstantRange(APInt(16, 2), APInt(16, 1))),
595 ConstantRange::getFull(16));
596 }
597
598 TEST_F(ConstantRangeTest, SetDifference) {
599 EXPECT_EQ(Full.difference(Empty), Full);
600 EXPECT_EQ(Full.difference(Full), Empty);
601 EXPECT_EQ(Empty.difference(Empty), Empty);
602 EXPECT_EQ(Empty.difference(Full), Empty);
603
604 ConstantRange A(APInt(16, 3), APInt(16, 7));
605 ConstantRange B(APInt(16, 5), APInt(16, 9));
606 ConstantRange C(APInt(16, 3), APInt(16, 5));
607 ConstantRange D(APInt(16, 7), APInt(16, 9));
608 ConstantRange E(APInt(16, 5), APInt(16, 4));
609 ConstantRange F(APInt(16, 7), APInt(16, 3));
610 EXPECT_EQ(A.difference(B), C);
611 EXPECT_EQ(B.difference(A), D);
612 EXPECT_EQ(E.difference(A), F);
613 }
614
615 TEST_F(ConstantRangeTest, SubtractAPInt) {
616 EXPECT_EQ(Full.subtract(APInt(16, 4)), Full);
617 EXPECT_EQ(Empty.subtract(APInt(16, 4)), Empty);
618 EXPECT_EQ(Some.subtract(APInt(16, 4)),
619 ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
620 EXPECT_EQ(Wrap.subtract(APInt(16, 4)),
621 ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
622 EXPECT_EQ(One.subtract(APInt(16, 4)),
623 ConstantRange(APInt(16, 0x6)));
624 }
625
626 TEST_F(ConstantRangeTest, Add) {
627 EXPECT_EQ(Full.add(APInt(16, 4)), Full);
628 EXPECT_EQ(Full.add(Full), Full);
629 EXPECT_EQ(Full.add(Empty), Empty);
630 EXPECT_EQ(Full.add(One), Full);
631 EXPECT_EQ(Full.add(Some), Full);
632 EXPECT_EQ(Full.add(Wrap), Full);
633 EXPECT_EQ(Empty.add(Empty), Empty);
634 EXPECT_EQ(Empty.add(One), Empty);
635 EXPECT_EQ(Empty.add(Some), Empty);
636 EXPECT_EQ(Empty.add(Wrap), Empty);
637 EXPECT_EQ(Empty.add(APInt(16, 4)), Empty);
638 EXPECT_EQ(Some.add(APInt(16, 4)),
639 ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
640 EXPECT_EQ(Wrap.add(APInt(16, 4)),
641 ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
642 EXPECT_EQ(One.add(APInt(16, 4)),
643 ConstantRange(APInt(16, 0xe)));
644 }
645
646 template <typename Fn1, typename Fn2>
647 static void TestAddWithNoSignedWrapExhaustive(Fn1 RangeFn, Fn2 IntFn) {
648 unsigned Bits = 4;
649 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1,
650 const ConstantRange &CR2) {
651 ConstantRange CR = RangeFn(CR1, CR2);
652 APInt Min = APInt::getSignedMaxValue(Bits);
653 APInt Max = APInt::getSignedMinValue(Bits);
654 ForeachNumInConstantRange(CR1, [&](const APInt &N1) {
655 ForeachNumInConstantRange(CR2, [&](const APInt &N2) {
656 bool IsOverflow = false;
657 APInt N = IntFn(IsOverflow, N1, N2);
658 if (!IsOverflow) {
659 if (N.slt(Min))
660 Min = N;
661 if (N.sgt(Max))
662 Max = N;
663 EXPECT_TRUE(CR.contains(N));
664 }
665 });
666 });
667 if (!CR1.isSignWrappedSet() && !CR2.isSignWrappedSet()) {
668 if (Min.sgt(Max)) {
669 EXPECT_TRUE(CR.isEmptySet());
670 return;
671 }
672
673 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1);
674 EXPECT_EQ(Exact, CR);
675 }
676 });
677 }
678
679 template <typename Fn1, typename Fn2>
680 static void TestAddWithNoUnsignedWrapExhaustive(Fn1 RangeFn, Fn2 IntFn) {
681 unsigned Bits = 4;
682 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1,
683 const ConstantRange &CR2) {
684 ConstantRange CR = RangeFn(CR1, CR2);
685 APInt Min = APInt::getMaxValue(Bits);
686 APInt Max = APInt::getMinValue(Bits);
687 ForeachNumInConstantRange(CR1, [&](const APInt &N1) {
688 ForeachNumInConstantRange(CR2, [&](const APInt &N2) {
689 bool IsOverflow = false;
690 APInt N = IntFn(IsOverflow, N1, N2);
691 if (!IsOverflow) {
692 if (N.ult(Min))
693 Min = N;
694 if (N.ugt(Max))
695 Max = N;
696 EXPECT_TRUE(CR.contains(N));
697 }
698 });
699 });
700
701 if (!CR1.isWrappedSet() && !CR2.isWrappedSet()) {
702 if (Min.ugt(Max)) {
703 EXPECT_TRUE(CR.isEmptySet());
704 return;
705 }
706
707 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1);
708 EXPECT_EQ(Exact, CR);
709 }
710 });
711 }
712
713 template <typename Fn1, typename Fn2, typename Fn3>
714 static void TestAddWithNoSignedUnsignedWrapExhaustive(Fn1 RangeFn,
715 Fn2 IntFnSigned,
716 Fn3 IntFnUnsigned) {
717 unsigned Bits = 4;
718 EnumerateTwoConstantRanges(
719 Bits, [&](const ConstantRange &CR1, const ConstantRange &CR2) {
720 ConstantRange CR = RangeFn(CR1, CR2);
721 APInt UMin = APInt::getMaxValue(Bits);
722 APInt UMax = APInt::getMinValue(Bits);
723 APInt SMin = APInt::getSignedMaxValue(Bits);
724 APInt SMax = APInt::getSignedMinValue(Bits);
725 ForeachNumInConstantRange(CR1, [&](const APInt &N1) {
726 ForeachNumInConstantRange(CR2, [&](const APInt &N2) {
727 bool IsOverflow = false, IsSignedOverflow = false;
728 APInt N = IntFnSigned(IsSignedOverflow, N1, N2);
729 (void) IntFnUnsigned(IsOverflow, N1, N2);
730 if (!IsSignedOverflow && !IsOverflow) {
731 if (N.slt(SMin))
732 SMin = N;
733 if (N.sgt(SMax))
734 SMax = N;
735 if (N.ult(UMin))
736 UMin = N;
737 if (N.ugt(UMax))
738 UMax = N;
739 EXPECT_TRUE(CR.contains(N));
740 }
741 });
742 });
743
744 if (!CR1.isWrappedSet() && !CR2.isWrappedSet() &&
745 !CR1.isSignWrappedSet() && !CR2.isSignWrappedSet()) {
746 if (UMin.ugt(UMax) || SMin.sgt(SMax)) {
747 EXPECT_TRUE(CR.isEmptySet());
748 return;
749 }
750
751 ConstantRange Exact =
752 ConstantRange::getNonEmpty(SMin, SMax + 1)
753 .intersectWith(ConstantRange::getNonEmpty(UMin, UMax + 1));
754 EXPECT_EQ(Exact, CR);
755 }
756 });
757 }
758
759 TEST_F(ConstantRangeTest, AddWithNoWrap) {
760 typedef OverflowingBinaryOperator OBO;
761 EXPECT_EQ(Empty.addWithNoWrap(Some, OBO::NoSignedWrap), Empty);
762 EXPECT_EQ(Some.addWithNoWrap(Empty, OBO::NoSignedWrap), Empty);
763 EXPECT_EQ(Full.addWithNoWrap(Full, OBO::NoSignedWrap), Full);
764 EXPECT_NE(Full.addWithNoWrap(Some, OBO::NoSignedWrap), Full);
765 EXPECT_NE(Some.addWithNoWrap(Full, OBO::NoSignedWrap), Full);
766 EXPECT_EQ(Full.addWithNoWrap(ConstantRange(APInt(16, 1), APInt(16, 2)),
767 OBO::NoSignedWrap),
768 ConstantRange(APInt(16, INT16_MIN + 1), APInt(16, INT16_MIN)));
769 EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 2))
770 .addWithNoWrap(Full, OBO::NoSignedWrap),
771 ConstantRange(APInt(16, INT16_MIN + 1), APInt(16, INT16_MIN)));
772 EXPECT_EQ(Full.addWithNoWrap(ConstantRange(APInt(16, -1), APInt(16, 0)),
773 OBO::NoSignedWrap),
774 ConstantRange(APInt(16, INT16_MIN), APInt(16, INT16_MAX)));
775 EXPECT_EQ(ConstantRange(APInt(8, 100), APInt(8, 120))
776 .addWithNoWrap(ConstantRange(APInt(8, 120), APInt(8, 123)),
777 OBO::NoSignedWrap),
778 ConstantRange(8, false));
779 EXPECT_EQ(ConstantRange(APInt(8, -120), APInt(8, -100))
780 .addWithNoWrap(ConstantRange(APInt(8, -110), APInt(8, -100)),
781 OBO::NoSignedWrap),
782 ConstantRange(8, false));
783 EXPECT_EQ(ConstantRange(APInt(8, 0), APInt(8, 101))
784 .addWithNoWrap(ConstantRange(APInt(8, -128), APInt(8, 28)),
785 OBO::NoSignedWrap),
786 ConstantRange(8, true));
787 EXPECT_EQ(ConstantRange(APInt(8, 0), APInt(8, 101))
788 .addWithNoWrap(ConstantRange(APInt(8, -120), APInt(8, 29)),
789 OBO::NoSignedWrap),
790 ConstantRange(APInt(8, -120), APInt(8, -128)));
791 EXPECT_EQ(ConstantRange(APInt(8, -50), APInt(8, 50))
792 .addWithNoWrap(ConstantRange(APInt(8, 10), APInt(8, 20)),
793 OBO::NoSignedWrap),
794 ConstantRange(APInt(8, -40), APInt(8, 69)));
795 EXPECT_EQ(ConstantRange(APInt(8, 10), APInt(8, 20))
796 .addWithNoWrap(ConstantRange(APInt(8, -50), APInt(8, 50)),
797 OBO::NoSignedWrap),
798 ConstantRange(APInt(8, -40), APInt(8, 69)));
799 EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, -10))
800 .addWithNoWrap(ConstantRange(APInt(8, 5), APInt(8, 20)),
801 OBO::NoSignedWrap),
802 ConstantRange(APInt(8, 125), APInt(8, 9)));
803 EXPECT_EQ(ConstantRange(APInt(8, 5), APInt(8, 20))
804 .addWithNoWrap(ConstantRange(APInt(8, 120), APInt(8, -10)),
805 OBO::NoSignedWrap),
806 ConstantRange(APInt(8, 125), APInt(8, 9)));
807
808 TestAddWithNoSignedWrapExhaustive(
809 [](const ConstantRange &CR1, const ConstantRange &CR2) {
810 return CR1.addWithNoWrap(CR2, OBO::NoSignedWrap);
811 },
812 [](bool &IsOverflow, const APInt &N1, const APInt &N2) {
813 return N1.sadd_ov(N2, IsOverflow);
814 });
815
816 EXPECT_EQ(Empty.addWithNoWrap(Some, OBO::NoUnsignedWrap), Empty);
817 EXPECT_EQ(Some.addWithNoWrap(Empty, OBO::NoUnsignedWrap), Empty);
818 EXPECT_EQ(Full.addWithNoWrap(Full, OBO::NoUnsignedWrap), Full);
819 EXPECT_NE(Full.addWithNoWrap(Some, OBO::NoUnsignedWrap), Full);
820 EXPECT_NE(Some.addWithNoWrap(Full, OBO::NoUnsignedWrap), Full);
821 EXPECT_EQ(Full.addWithNoWrap(ConstantRange(APInt(16, 1), APInt(16, 2)),
822 OBO::NoUnsignedWrap),
823 ConstantRange(APInt(16, 1), APInt(16, 0)));
824 EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 2))
825 .addWithNoWrap(Full, OBO::NoUnsignedWrap),
826 ConstantRange(APInt(16, 1), APInt(16, 0)));
827 EXPECT_EQ(ConstantRange(APInt(8, 200), APInt(8, 220))
828 .addWithNoWrap(ConstantRange(APInt(8, 100), APInt(8, 123)),
829 OBO::NoUnsignedWrap),
830 ConstantRange(8, false));
831 EXPECT_EQ(ConstantRange(APInt(8, 0), APInt(8, 101))
832 .addWithNoWrap(ConstantRange(APInt(8, 0), APInt(8, 156)),
833 OBO::NoUnsignedWrap),
834 ConstantRange(8, true));
835 EXPECT_EQ(ConstantRange(APInt(8, 0), APInt(8, 101))
836 .addWithNoWrap(ConstantRange(APInt(8, 10), APInt(8, 29)),
837 OBO::NoUnsignedWrap),
838 ConstantRange(APInt(8, 10), APInt(8, 129)));
839 EXPECT_EQ(ConstantRange(APInt(8, 20), APInt(8, 10))
840 .addWithNoWrap(ConstantRange(APInt(8, 50), APInt(8, 200)),
841 OBO::NoUnsignedWrap),
842 ConstantRange(APInt(8, 50), APInt(8, 0)));
843 EXPECT_EQ(ConstantRange(APInt(8, 10), APInt(8, 20))
844 .addWithNoWrap(ConstantRange(APInt(8, 50), APInt(8, 200)),
845 OBO::NoUnsignedWrap),
846 ConstantRange(APInt(8, 60), APInt(8, -37)));
847 EXPECT_EQ(ConstantRange(APInt(8, 20), APInt(8, -30))
848 .addWithNoWrap(ConstantRange(APInt(8, 5), APInt(8, 20)),
849 OBO::NoUnsignedWrap),
850 ConstantRange(APInt(8, 25), APInt(8, -11)));
851 EXPECT_EQ(ConstantRange(APInt(8, 5), APInt(8, 20))
852 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, -30)),
853 OBO::NoUnsignedWrap),
854 ConstantRange(APInt(8, 25), APInt(8, -11)));
855
856 TestAddWithNoUnsignedWrapExhaustive(
857 [](const ConstantRange &CR1, const ConstantRange &CR2) {
858 return CR1.addWithNoWrap(CR2, OBO::NoUnsignedWrap);
859 },
860 [](bool &IsOverflow, const APInt &N1, const APInt &N2) {
861 return N1.uadd_ov(N2, IsOverflow);
862 });
863
864 EXPECT_EQ(ConstantRange(APInt(8, 50), APInt(8, 100))
865 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 70)),
866 OBO::NoSignedWrap),
867 ConstantRange(APInt(8, 70), APInt(8, -128)));
868 EXPECT_EQ(ConstantRange(APInt(8, 50), APInt(8, 100))
869 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 70)),
870 OBO::NoUnsignedWrap),
871 ConstantRange(APInt(8, 70), APInt(8, 169)));
872 EXPECT_EQ(ConstantRange(APInt(8, 50), APInt(8, 100))
873 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 70)),
874 OBO::NoUnsignedWrap | OBO::NoSignedWrap),
875 ConstantRange(APInt(8, 70), APInt(8, -128)));
876
877 EXPECT_EQ(ConstantRange(APInt(8, -100), APInt(8, -50))
878 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 30)),
879 OBO::NoSignedWrap),
880 ConstantRange(APInt(8, -80), APInt(8, -21)));
881 EXPECT_EQ(ConstantRange(APInt(8, -100), APInt(8, -50))
882 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 30)),
883 OBO::NoUnsignedWrap),
884 ConstantRange(APInt(8, 176), APInt(8, 235)));
885 EXPECT_EQ(ConstantRange(APInt(8, -100), APInt(8, -50))
886 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 30)),
887 OBO::NoUnsignedWrap | OBO::NoSignedWrap),
888 ConstantRange(APInt(8, 176), APInt(8, 235)));
889
890 TestAddWithNoSignedUnsignedWrapExhaustive(
891 [](const ConstantRange &CR1, const ConstantRange &CR2) {
892 return CR1.addWithNoWrap(CR2, OBO::NoUnsignedWrap | OBO::NoSignedWrap);
893 },
894 [](bool &IsOverflow, const APInt &N1, const APInt &N2) {
895 return N1.sadd_ov(N2, IsOverflow);
896 },
897 [](bool &IsOverflow, const APInt &N1, const APInt &N2) {
898 return N1.uadd_ov(N2, IsOverflow);
899 });
900 }
901
902 TEST_F(ConstantRangeTest, Sub) {
903 EXPECT_EQ(Full.sub(APInt(16, 4)), Full);
904 EXPECT_EQ(Full.sub(Full), Full);
905 EXPECT_EQ(Full.sub(Empty), Empty);
906 EXPECT_EQ(Full.sub(One), Full);
907 EXPECT_EQ(Full.sub(Some), Full);
908 EXPECT_EQ(Full.sub(Wrap), Full);
909 EXPECT_EQ(Empty.sub(Empty), Empty);
910 EXPECT_EQ(Empty.sub(One), Empty);
911 EXPECT_EQ(Empty.sub(Some), Empty);
912 EXPECT_EQ(Empty.sub(Wrap), Empty);
913 EXPECT_EQ(Empty.sub(APInt(16, 4)), Empty);
914 EXPECT_EQ(Some.sub(APInt(16, 4)),
915 ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
916 EXPECT_EQ(Some.sub(Some),
917 ConstantRange(APInt(16, 0xf561), APInt(16, 0xaa0)));
918 EXPECT_EQ(Wrap.sub(APInt(16, 4)),
919 ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
920 EXPECT_EQ(One.sub(APInt(16, 4)),
921 ConstantRange(APInt(16, 0x6)));
922 }
923
924 TEST_F(ConstantRangeTest, Multiply) {
925 EXPECT_EQ(Full.multiply(Full), Full);
926 EXPECT_EQ(Full.multiply(Empty), Empty);
927 EXPECT_EQ(Full.multiply(One), Full);
928 EXPECT_EQ(Full.multiply(Some), Full);
929 EXPECT_EQ(Full.multiply(Wrap), Full);
930 EXPECT_EQ(Empty.multiply(Empty), Empty);
931 EXPECT_EQ(Empty.multiply(One), Empty);
932 EXPECT_EQ(Empty.multiply(Some), Empty);
933 EXPECT_EQ(Empty.multiply(Wrap), Empty);
934 EXPECT_EQ(One.multiply(One), ConstantRange(APInt(16, 0xa*0xa),
935 APInt(16, 0xa*0xa + 1)));
936 EXPECT_EQ(One.multiply(Some), ConstantRange(APInt(16, 0xa*0xa),
937 APInt(16, 0xa*0xaa9 + 1)));
938 EXPECT_EQ(One.multiply(Wrap), Full);
939 EXPECT_EQ(Some.multiply(Some), Full);
940 EXPECT_EQ(Some.multiply(Wrap), Full);
941 EXPECT_EQ(Wrap.multiply(Wrap), Full);
942
943 ConstantRange Zero(APInt(16, 0));
944 EXPECT_EQ(Zero.multiply(Full), Zero);
945 EXPECT_EQ(Zero.multiply(Some), Zero);
946 EXPECT_EQ(Zero.multiply(Wrap), Zero);
947 EXPECT_EQ(Full.multiply(Zero), Zero);
948 EXPECT_EQ(Some.multiply(Zero), Zero);
949 EXPECT_EQ(Wrap.multiply(Zero), Zero);
950
951 // http://llvm.org/PR4545
952 EXPECT_EQ(ConstantRange(APInt(4, 1), APInt(4, 6)).multiply(
953 ConstantRange(APInt(4, 6), APInt(4, 2))),
954 ConstantRange(4, /*isFullSet=*/true));
955
956 EXPECT_EQ(ConstantRange(APInt(8, 254), APInt(8, 0)).multiply(
957 ConstantRange(APInt(8, 252), APInt(8, 4))),
958 ConstantRange(APInt(8, 250), APInt(8, 9)));
959 EXPECT_EQ(ConstantRange(APInt(8, 254), APInt(8, 255)).multiply(
960 ConstantRange(APInt(8, 2), APInt(8, 4))),
961 ConstantRange(APInt(8, 250), APInt(8, 253)));
962
963 // TODO: This should be return [-2, 0]
964 EXPECT_EQ(ConstantRange(APInt(8, -2)).multiply(
965 ConstantRange(APInt(8, 0), APInt(8, 2))),
966 ConstantRange(APInt(8, -2), APInt(8, 1)));
967 }
968
969 TEST_F(ConstantRangeTest, UMax) {
970 EXPECT_EQ(Full.umax(Full), Full);
971 EXPECT_EQ(Full.umax(Empty), Empty);
972 EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
973 EXPECT_EQ(Full.umax(Wrap), Full);
974 EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
975 EXPECT_EQ(Empty.umax(Empty), Empty);
976 EXPECT_EQ(Empty.umax(Some), Empty);
977 EXPECT_EQ(Empty.umax(Wrap), Empty);
978 EXPECT_EQ(Empty.umax(One), Empty);
979 EXPECT_EQ(Some.umax(Some), Some);
980 EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
981 EXPECT_EQ(Some.umax(One), Some);
982 // TODO: ConstantRange is currently over-conservative here.
983 EXPECT_EQ(Wrap.umax(Wrap), Full);
984 EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
985 EXPECT_EQ(One.umax(One), One);
986 }
987
988 TEST_F(ConstantRangeTest, SMax) {
989 EXPECT_EQ(Full.smax(Full), Full);
990 EXPECT_EQ(Full.smax(Empty), Empty);
991 EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa),
992 APInt::getSignedMinValue(16)));
993 EXPECT_EQ(Full.smax(Wrap), Full);
994 EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa),
995 APInt::getSignedMinValue(16)));
996 EXPECT_EQ(Empty.smax(Empty), Empty);
997 EXPECT_EQ(Empty.smax(Some), Empty);
998 EXPECT_EQ(Empty.smax(Wrap), Empty);
999 EXPECT_EQ(Empty.smax(One), Empty);
1000 EXPECT_EQ(Some.smax(Some), Some);
1001 EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa),
1002 APInt(16, (uint64_t)INT16_MIN)));
1003 EXPECT_EQ(Some.smax(One), Some);
1004 EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
1005 APInt(16, (uint64_t)INT16_MIN)));
1006 EXPECT_EQ(One.smax(One), One);
1007 }
1008
1009 TEST_F(ConstantRangeTest, UMin) {
1010 EXPECT_EQ(Full.umin(Full), Full);
1011 EXPECT_EQ(Full.umin(Empty), Empty);
1012 EXPECT_EQ(Full.umin(Some), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
1013 EXPECT_EQ(Full.umin(Wrap), Full);
1014 EXPECT_EQ(Empty.umin(Empty), Empty);
1015 EXPECT_EQ(Empty.umin(Some), Empty);
1016 EXPECT_EQ(Empty.umin(Wrap), Empty);
1017 EXPECT_EQ(Empty.umin(One), Empty);
1018 EXPECT_EQ(Some.umin(Some), Some);
1019 EXPECT_EQ(Some.umin(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
1020 EXPECT_EQ(Some.umin(One), One);
1021 // TODO: ConstantRange is currently over-conservative here.
1022 EXPECT_EQ(Wrap.umin(Wrap), Full);
1023 EXPECT_EQ(Wrap.umin(One), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
1024 EXPECT_EQ(One.umin(One), One);
1025 }
1026
1027 TEST_F(ConstantRangeTest, SMin) {
1028 EXPECT_EQ(Full.smin(Full), Full);
1029 EXPECT_EQ(Full.smin(Empty), Empty);
1030 EXPECT_EQ(Full.smin(Some), ConstantRange(APInt(16, (uint64_t)INT16_MIN),
1031 APInt(16, 0xaaa)));
1032 EXPECT_EQ(Full.smin(Wrap), Full);
1033 EXPECT_EQ(Empty.smin(Empty), Empty);
1034 EXPECT_EQ(Empty.smin(Some), Empty);
1035 EXPECT_EQ(Empty.smin(Wrap), Empty);
1036 EXPECT_EQ(Empty.smin(One), Empty);
1037 EXPECT_EQ(Some.smin(Some), Some);
1038 EXPECT_EQ(Some.smin(Wrap), ConstantRange(APInt(16, (uint64_t)INT16_MIN),
1039 APInt(16, 0xaaa)));
1040 EXPECT_EQ(Some.smin(One), One);
1041 // TODO: ConstantRange is currently over-conservative here.
1042 EXPECT_EQ(Wrap.smin(Wrap), Full);
1043 EXPECT_EQ(Wrap.smin(One), ConstantRange(APInt(16, (uint64_t)INT16_MIN),
1044 APInt(16, 0xb)));
1045 EXPECT_EQ(One.smin(One), One);
1046 }
1047
1048 TEST_F(ConstantRangeTest, UDiv) {
1049 EXPECT_EQ(Full.udiv(Full), Full);
1050 EXPECT_EQ(Full.udiv(Empty), Empty);
1051 EXPECT_EQ(Full.udiv(One), ConstantRange(APInt(16, 0),
1052 APInt(16, 0xffff / 0xa + 1)));
1053 EXPECT_EQ(Full.udiv(Some), ConstantRange(APInt(16, 0),
1054 APInt(16, 0xffff / 0xa + 1)));
1055 EXPECT_EQ(Full.udiv(Wrap), Full);
1056 EXPECT_EQ(Empty.udiv(Empty), Empty);
1057 EXPECT_EQ(Empty.udiv(One), Empty);
1058 EXPECT_EQ(Empty.udiv(Some), Empty);
1059 EXPECT_EQ(Empty.udiv(Wrap), Empty);
1060 EXPECT_EQ(One.udiv(One), ConstantRange(APInt(16, 1)));
1061 EXPECT_EQ(One.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 2)));
1062 EXPECT_EQ(One.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
1063 EXPECT_EQ(Some.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 0x111)));
1064 EXPECT_EQ(Some.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
1065 EXPECT_EQ(Wrap.udiv(Wrap), Full);
1066
1067
1068 ConstantRange Zero(APInt(16, 0));
1069 EXPECT_EQ(Zero.udiv(One), Zero);
1070 EXPECT_EQ(Zero.udiv(Full), Zero);
1071
1072 EXPECT_EQ(ConstantRange(APInt(16, 0), APInt(16, 99)).udiv(Full),
1073 ConstantRange(APInt(16, 0), APInt(16, 99)));
1074 EXPECT_EQ(ConstantRange(APInt(16, 10), APInt(16, 99)).udiv(Full),
1075 ConstantRange(APInt(16, 0), APInt(16, 99)));
1076 }
1077
1078 TEST_F(ConstantRangeTest, SDiv) {
1079 unsigned Bits = 4;
1080 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1,
1081 const ConstantRange &CR2) {
1082 // Collect possible results in a bit vector. We store the signed value plus
1083 // a bias to make it unsigned.
1084 int Bias = 1 << (Bits - 1);
1085 BitVector Results(1 << Bits);
1086 ForeachNumInConstantRange(CR1, [&](const APInt &N1) {
1087 ForeachNumInConstantRange(CR2, [&](const APInt &N2) {
1088 // Division by zero is UB.
1089 if (N2 == 0)
1090 return;
1091
1092 // SignedMin / -1 is UB.
1093 if (N1.isMinSignedValue() && N2.isAllOnesValue())
1094 return;
1095
1096 APInt N = N1.sdiv(N2);
1097 Results.set(N.getSExtValue() + Bias);
1098 });
1099 });
1100
1101 ConstantRange CR = CR1.sdiv(CR2);
1102 if (Results.none()) {
1103 EXPECT_TRUE(CR.isEmptySet());
1104 return;
1105 }
1106
1107 // If there is a non-full signed envelope, that should be the result.
1108 APInt SMin(Bits, Results.find_first() - Bias);
1109 APInt SMax(Bits, Results.find_last() - Bias);
1110 ConstantRange Envelope = ConstantRange::getNonEmpty(SMin, SMax + 1);
1111 if (!Envelope.isFullSet()) {
1112 EXPECT_EQ(Envelope, CR);
1113 return;
1114 }
1115
1116 // If the signed envelope is a full set, try to find a smaller sign wrapped
1117 // set that is separated in negative and positive components (or one which
1118 // can also additionally contain zero).
1119 int LastNeg = Results.find_last_in(0, Bias) - Bias;
1120 int LastPos = Results.find_next(Bias) - Bias;
1121 if (Results[Bias]) {
1122 if (LastNeg == -1)
1123 ++LastNeg;
1124 else if (LastPos == 1)
1125 --LastPos;
1126 }
1127
1128 APInt WMax(Bits, LastNeg);
1129 APInt WMin(Bits, LastPos);
1130 ConstantRange Wrapped = ConstantRange::getNonEmpty(WMin, WMax + 1);
1131 EXPECT_EQ(Wrapped, CR);
1132 });
1133 }
1134
1135 TEST_F(ConstantRangeTest, URem) {
1136 EXPECT_EQ(Full.urem(Empty), Empty);
1137 EXPECT_EQ(Empty.urem(Full), Empty);
1138 // urem by zero is poison.
1139 EXPECT_EQ(Full.urem(ConstantRange(APInt(16, 0))), Empty);
1140 // urem by full range doesn't contain MaxValue.
1141 EXPECT_EQ(Full.urem(Full), ConstantRange(APInt(16, 0), APInt(16, 0xffff)));
1142 // urem is upper bounded by maximum RHS minus one.
1143 EXPECT_EQ(Full.urem(ConstantRange(APInt(16, 0), APInt(16, 123))),
1144 ConstantRange(APInt(16, 0), APInt(16, 122)));
1145 // urem is upper bounded by maximum LHS.
1146 EXPECT_EQ(ConstantRange(APInt(16, 0), APInt(16, 123)).urem(Full),
1147 ConstantRange(APInt(16, 0), APInt(16, 123)));
1148 // If the LHS is always lower than the RHS, the result is the LHS.
1149 EXPECT_EQ(ConstantRange(APInt(16, 10), APInt(16, 20))
1150 .urem(ConstantRange(APInt(16, 20), APInt(16, 30))),
1151 ConstantRange(APInt(16, 10), APInt(16, 20)));
1152 // It has to be strictly lower, otherwise the top value may wrap to zero.
1153 EXPECT_EQ(ConstantRange(APInt(16, 10), APInt(16, 20))
1154 .urem(ConstantRange(APInt(16, 19), APInt(16, 30))),
1155 ConstantRange(APInt(16, 0), APInt(16, 20)));
1156 // [12, 14] % 10 is [2, 4], but we conservatively compute [0, 9].
1157 EXPECT_EQ(ConstantRange(APInt(16, 12), APInt(16, 15))
1158 .urem(ConstantRange(APInt(16, 10))),
1159 ConstantRange(APInt(16, 0), APInt(16, 10)));
1160
1161 TestUnsignedBinOpExhaustive(
1162 [](const ConstantRange &CR1, const ConstantRange &CR2) {
1163 return CR1.urem(CR2);
1164 },
1165 [](const APInt &N1, const APInt &N2) {
1166 return N1.urem(N2);
1167 },
1168 /* SkipZeroRHS */ true, /* CorrectnessOnly */ true);
1169 }
1170
1171 TEST_F(ConstantRangeTest, SRem) {
1172 EXPECT_EQ(Full.srem(Empty), Empty);
1173 EXPECT_EQ(Empty.srem(Full), Empty);
1174 // srem by zero is UB.
1175 EXPECT_EQ(Full.srem(ConstantRange(APInt(16, 0))), Empty);
1176 // srem by full range doesn't contain SignedMinValue.
1177 EXPECT_EQ(Full.srem(Full), ConstantRange(APInt::getSignedMinValue(16) + 1,
1178 APInt::getSignedMinValue(16)));
1179
1180 ConstantRange PosMod(APInt(16, 10), APInt(16, 21)); // [10, 20]
1181 ConstantRange NegMod(APInt(16, -20), APInt(16, -9)); // [-20, -10]
1182 ConstantRange IntMinMod(APInt::getSignedMinValue(16));
1183
1184 ConstantRange Expected(16, true);
1185
1186 // srem is bounded by abs(RHS) minus one.
1187 ConstantRange PosLargeLHS(APInt(16, 0), APInt(16, 41));
1188 Expected = ConstantRange(APInt(16, 0), APInt(16, 20));
1189 EXPECT_EQ(PosLargeLHS.srem(PosMod), Expected);
1190 EXPECT_EQ(PosLargeLHS.srem(NegMod), Expected);
1191 ConstantRange NegLargeLHS(APInt(16, -40), APInt(16, 1));
1192 Expected = ConstantRange(APInt(16, -19), APInt(16, 1));
1193 EXPECT_EQ(NegLargeLHS.srem(PosMod), Expected);
1194 EXPECT_EQ(NegLargeLHS.srem(NegMod), Expected);
1195 ConstantRange PosNegLargeLHS(APInt(16, -32), APInt(16, 38));
1196 Expected = ConstantRange(APInt(16, -19), APInt(16, 20));
1197 EXPECT_EQ(PosNegLargeLHS.srem(PosMod), Expected);
1198 EXPECT_EQ(PosNegLargeLHS.srem(NegMod), Expected);
1199
1200 // srem is bounded by LHS.
1201 ConstantRange PosLHS(APInt(16, 0), APInt(16, 16));
1202 EXPECT_EQ(PosLHS.srem(PosMod), PosLHS);
1203 EXPECT_EQ(PosLHS.srem(NegMod), PosLHS);
1204 EXPECT_EQ(PosLHS.srem(IntMinMod), PosLHS);
1205 ConstantRange NegLHS(APInt(16, -15), APInt(16, 1));
1206 EXPECT_EQ(NegLHS.srem(PosMod), NegLHS);
1207 EXPECT_EQ(NegLHS.srem(NegMod), NegLHS);
1208 EXPECT_EQ(NegLHS.srem(IntMinMod), NegLHS);
1209 ConstantRange PosNegLHS(APInt(16, -12), APInt(16, 18));
1210 EXPECT_EQ(PosNegLHS.srem(PosMod), PosNegLHS);
1211 EXPECT_EQ(PosNegLHS.srem(NegMod), PosNegLHS);
1212 EXPECT_EQ(PosNegLHS.srem(IntMinMod), PosNegLHS);
1213
1214 // srem is LHS if it is smaller than RHS.
1215 ConstantRange PosSmallLHS(APInt(16, 3), APInt(16, 8));
1216 EXPECT_EQ(PosSmallLHS.srem(PosMod), PosSmallLHS);
1217 EXPECT_EQ(PosSmallLHS.srem(NegMod), PosSmallLHS);
1218 EXPECT_EQ(PosSmallLHS.srem(IntMinMod), PosSmallLHS);
1219 ConstantRange NegSmallLHS(APInt(16, -7), APInt(16, -2));
1220 EXPECT_EQ(NegSmallLHS.srem(PosMod), NegSmallLHS);
1221 EXPECT_EQ(NegSmallLHS.srem(NegMod), NegSmallLHS);
1222 EXPECT_EQ(NegSmallLHS.srem(IntMinMod), NegSmallLHS);
1223 ConstantRange PosNegSmallLHS(APInt(16, -3), APInt(16, 8));
1224 EXPECT_EQ(PosNegSmallLHS.srem(PosMod), PosNegSmallLHS);
1225 EXPECT_EQ(PosNegSmallLHS.srem(NegMod), PosNegSmallLHS);
1226 EXPECT_EQ(PosNegSmallLHS.srem(IntMinMod), PosNegSmallLHS);
1227
1228 // Example of a suboptimal result:
1229 // [12, 14] srem 10 is [2, 4], but we conservatively compute [0, 9].
1230 EXPECT_EQ(ConstantRange(APInt(16, 12), APInt(16, 15))
1231 .srem(ConstantRange(APInt(16, 10))),
1232 ConstantRange(APInt(16, 0), APInt(16, 10)));
1233
1234 TestSignedBinOpExhaustive(
1235 [](const ConstantRange &CR1, const ConstantRange &CR2) {
1236 return CR1.srem(CR2);
1237 },
1238 [](const APInt &N1, const APInt &N2) {
1239 return N1.srem(N2);
1240 },
1241 /* SkipZeroRHS */ true, /* CorrectnessOnly */ true);
1242 }
1243
1244 TEST_F(ConstantRangeTest, Shl) {
1245 ConstantRange Some2(APInt(16, 0xfff), APInt(16, 0x8000));
1246 ConstantRange WrapNullMax(APInt(16, 0x1), APInt(16, 0x0));
1247 EXPECT_EQ(Full.shl(Full), Full);
1248 EXPECT_EQ(Full.shl(Empty), Empty);
1249 EXPECT_EQ(Full.shl(One), Full); // TODO: [0, (-1 << 0xa) + 1)
1250 EXPECT_EQ(Full.shl(Some), Full); // TODO: [0, (-1 << 0xa) + 1)
1251 EXPECT_EQ(Full.shl(Wrap), Full);
1252 EXPECT_EQ(Empty.shl(Empty), Empty);
1253 EXPECT_EQ(Empty.shl(One), Empty);
1254 EXPECT_EQ(Empty.shl(Some), Empty);
1255 EXPECT_EQ(Empty.shl(Wrap), Empty);
1256 EXPECT_EQ(One.shl(One), ConstantRange(APInt(16, 0xa << 0xa),
1257 APInt(16, (0xa << 0xa) + 1)));
1258 EXPECT_EQ(One.shl(Some), Full); // TODO: [0xa << 0xa, 0)
1259 EXPECT_EQ(One.shl(Wrap), Full); // TODO: [0xa, 0xa << 14 + 1)
1260 EXPECT_EQ(Some.shl(Some), Full); // TODO: [0xa << 0xa, 0xfc01)
1261 EXPECT_EQ(Some.shl(Wrap), Full); // TODO: [0xa, 0x7ff << 0x5 + 1)
1262 EXPECT_EQ(Wrap.shl(Wrap), Full);
1263 EXPECT_EQ(
1264 Some2.shl(ConstantRange(APInt(16, 0x1))),
1265 ConstantRange(APInt(16, 0xfff << 0x1), APInt(16, 0x7fff << 0x1) + 1));
1266 EXPECT_EQ(One.shl(WrapNullMax), Full);
1267 }
1268
1269 TEST_F(ConstantRangeTest, Lshr) {
1270 EXPECT_EQ(Full.lshr(Full), Full);
1271 EXPECT_EQ(Full.lshr(Empty), Empty);
1272 EXPECT_EQ(Full.lshr(One), ConstantRange(APInt(16, 0),
1273 APInt(16, (0xffff >> 0xa) + 1)));
1274 EXPECT_EQ(Full.lshr(Some), ConstantRange(APInt(16, 0),
1275 APInt(16, (0xffff >> 0xa) + 1)));
1276 EXPECT_EQ(Full.lshr(Wrap), Full);
1277 EXPECT_EQ(Empty.lshr(Empty), Empty);
1278 EXPECT_EQ(Empty.lshr(One), Empty);
1279 EXPECT_EQ(Empty.lshr(Some), Empty);
1280 EXPECT_EQ(Empty.lshr(Wrap), Empty);
1281 EXPECT_EQ(One.lshr(One), ConstantRange(APInt(16, 0)));
1282 EXPECT_EQ(One.lshr(Some), ConstantRange(APInt(16, 0)));
1283 EXPECT_EQ(One.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
1284 EXPECT_EQ(Some.lshr(Some), ConstantRange(APInt(16, 0),
1285 APInt(16, (0xaaa >> 0xa) + 1)));
1286 EXPECT_EQ(Some.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
1287 EXPECT_EQ(Wrap.lshr(Wrap), Full);
1288 }
1289
1290 TEST_F(ConstantRangeTest, Ashr) {
1291 EXPECT_EQ(Full.ashr(Full), Full);
1292 EXPECT_EQ(Full.ashr(Empty), Empty);
1293 EXPECT_EQ(Full.ashr(One), ConstantRange(APInt(16, 0xffe0),
1294 APInt(16, (0x7fff >> 0xa) + 1 )));
1295 ConstantRange Small(APInt(16, 0xa), APInt(16, 0xb));
1296 EXPECT_EQ(Full.ashr(Small), ConstantRange(APInt(16, 0xffe0),
1297 APInt(16, (0x7fff >> 0xa) + 1 )));
1298 EXPECT_EQ(Full.ashr(Some), ConstantRange(APInt(16, 0xffe0),
1299 APInt(16, (0x7fff >> 0xa) + 1 )));
1300 EXPECT_EQ(Full.ashr(Wrap), Full);
1301 EXPECT_EQ(Empty.ashr(Empty), Empty);
1302 EXPECT_EQ(Empty.ashr(One), Empty);
1303 EXPECT_EQ(Empty.ashr(Some), Empty);
1304 EXPECT_EQ(Empty.ashr(Wrap), Empty);
1305 EXPECT_EQ(One.ashr(One), ConstantRange(APInt(16, 0)));
1306 EXPECT_EQ(One.ashr(Some), ConstantRange(APInt(16, 0)));
1307 EXPECT_EQ(One.ashr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
1308 EXPECT_EQ(Some.ashr(Some), ConstantRange(APInt(16, 0),
1309 APInt(16, (0xaaa >> 0xa) + 1)));
1310 EXPECT_EQ(Some.ashr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
1311 EXPECT_EQ(Wrap.ashr(Wrap), Full);
1312 ConstantRange Neg(APInt(16, 0xf3f0, true), APInt(16, 0xf7f8, true));
1313 EXPECT_EQ(Neg.ashr(Small), ConstantRange(APInt(16, 0xfffc, true),
1314 APInt(16, 0xfffe, true)));
1315 }
1316
1317 TEST(ConstantRange, MakeAllowedICmpRegion) {
1318 // PR8250
1319 ConstantRange SMax = ConstantRange(APInt::getSignedMaxValue(32));
1320 EXPECT_TRUE(ConstantRange::makeAllowedICmpRegion(ICmpInst::ICMP_SGT, SMax)
1321 .isEmptySet());
1322 }
1323
1324 TEST(ConstantRange, MakeSatisfyingICmpRegion) {
1325 ConstantRange LowHalf(APInt(8, 0), APInt(8, 128));
1326 ConstantRange HighHalf(APInt(8, 128), APInt(8, 0));
1327 ConstantRange EmptySet(8, /* isFullSet = */ false);
1328
1329 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_NE, LowHalf),
1330 HighHalf);
1331
1332 EXPECT_EQ(
1333 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_NE, HighHalf),
1334 LowHalf);
1335
1336 EXPECT_TRUE(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_EQ,
1337 HighHalf).isEmptySet());
1338
1339 ConstantRange UnsignedSample(APInt(8, 5), APInt(8, 200));
1340
1341 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_ULT,
1342 UnsignedSample),
1343 ConstantRange(APInt(8, 0), APInt(8, 5)));
1344
1345 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_ULE,
1346 UnsignedSample),
1347 ConstantRange(APInt(8, 0), APInt(8, 6)));
1348
1349 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_UGT,
1350 UnsignedSample),
1351 ConstantRange(APInt(8, 200), APInt(8, 0)));
1352
1353 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_UGE,
1354 UnsignedSample),
1355 ConstantRange(APInt(8, 199), APInt(8, 0)));
1356
1357 ConstantRange SignedSample(APInt(8, -5), APInt(8, 5));
1358
1359 EXPECT_EQ(
1360 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SLT, SignedSample),
1361 ConstantRange(APInt(8, -128), APInt(8, -5)));
1362
1363 EXPECT_EQ(
1364 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SLE, SignedSample),
1365 ConstantRange(APInt(8, -128), APInt(8, -4)));
1366
1367 EXPECT_EQ(
1368 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SGT, SignedSample),
1369 ConstantRange(APInt(8, 5), APInt(8, -128)));
1370
1371 EXPECT_EQ(
1372 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SGE, SignedSample),
1373 ConstantRange(APInt(8, 4), APInt(8, -128)));
1374 }
1375
1376 TEST(ConstantRange, MakeGuaranteedNoWrapRegion) {
1377 const int IntMin4Bits = 8;
1378 const int IntMax4Bits = 7;
1379 typedef OverflowingBinaryOperator OBO;
1380
1381 for (int Const : {0, -1, -2, 1, 2, IntMin4Bits, IntMax4Bits}) {
1382 APInt C(4, Const, true /* = isSigned */);
1383
1384 auto NUWRegion = ConstantRange::makeGuaranteedNoWrapRegion(
1385 Instruction::Add, C, OBO::NoUnsignedWrap);
1386
1387 EXPECT_FALSE(NUWRegion.isEmptySet());
1388
1389 auto NSWRegion = ConstantRange::makeGuaranteedNoWrapRegion(
1390 Instruction::Add, C, OBO::NoSignedWrap);
1391
1392 EXPECT_FALSE(NSWRegion.isEmptySet());
1393
1394 for (APInt I = NUWRegion.getLower(), E = NUWRegion.getUpper(); I != E;
1395 ++I) {
1396 bool Overflow = false;
1397 (void)I.uadd_ov(C, Overflow);
1398 EXPECT_FALSE(Overflow);
1399 }
1400
1401 for (APInt I = NSWRegion.getLower(), E = NSWRegion.getUpper(); I != E;
1402 ++I) {
1403 bool Overflow = false;
1404 (void)I.sadd_ov(C, Overflow);
1405 EXPECT_FALSE(Overflow);
1406 }
1407 }
1408
1409 for (int Const : {0, -1, -2, 1, 2, IntMin4Bits, IntMax4Bits}) {
1410 APInt C(4, Const, true /* = isSigned */);
1411
1412 auto NUWRegion = ConstantRange::makeGuaranteedNoWrapRegion(
1413 Instruction::Sub, C, OBO::NoUnsignedWrap);
1414
1415 EXPECT_FALSE(NUWRegion.isEmptySet());
1416
1417 auto NSWRegion = ConstantRange::makeGuaranteedNoWrapRegion(
1418 Instruction::Sub, C, OBO::NoSignedWrap);
1419
1420 EXPECT_FALSE(NSWRegion.isEmptySet());
1421
1422 for (APInt I = NUWRegion.getLower(), E = NUWRegion.getUpper(); I != E;
1423 ++I) {
1424 bool Overflow = false;
1425 (void)I.usub_ov(C, Overflow);
1426 EXPECT_FALSE(Overflow);
1427 }
1428
1429 for (APInt I = NSWRegion.getLower(), E = NSWRegion.getUpper(); I != E;
1430 ++I) {
1431 bool Overflow = false;
1432 (void)I.ssub_ov(C, Overflow);
1433 EXPECT_FALSE(Overflow);
1434 }
1435 }
1436
1437 auto NSWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion(
1438 Instruction::Add, ConstantRange(32, /* isFullSet = */ true),
1439 OBO::NoSignedWrap);
1440 EXPECT_TRUE(NSWForAllValues.isSingleElement() &&
1441 NSWForAllValues.getSingleElement()->isMinValue());
1442
1443 NSWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion(
1444 Instruction::Sub, ConstantRange(32, /* isFullSet = */ true),
1445 OBO::NoSignedWrap);
1446 EXPECT_TRUE(NSWForAllValues.isSingleElement() &&
1447 NSWForAllValues.getSingleElement()->isMaxValue());
1448
1449 auto NUWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion(
1450 Instruction::Add, ConstantRange(32, /* isFullSet = */ true),
1451 OBO::NoUnsignedWrap);
1452 EXPECT_TRUE(NUWForAllValues.isSingleElement() &&
1453 NUWForAllValues.getSingleElement()->isMinValue());
1454
1455 NUWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion(
1456 Instruction::Sub, ConstantRange(32, /* isFullSet = */ true),
1457 OBO::NoUnsignedWrap);
1458 EXPECT_TRUE(NUWForAllValues.isSingleElement() &&
1459 NUWForAllValues.getSingleElement()->isMaxValue());
1460
1461 EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion(
1462 Instruction::Add, APInt(32, 0), OBO::NoUnsignedWrap).isFullSet());
1463 EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion(
1464 Instruction::Add, APInt(32, 0), OBO::NoSignedWrap).isFullSet());
1465 EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion(
1466 Instruction::Sub, APInt(32, 0), OBO::NoUnsignedWrap).isFullSet());
1467 EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion(
1468 Instruction::Sub, APInt(32, 0), OBO::NoSignedWrap).isFullSet());
1469
1470 ConstantRange OneToFive(APInt(32, 1), APInt(32, 6));
1471 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1472 Instruction::Add, OneToFive, OBO::NoSignedWrap),
1473 ConstantRange(APInt::getSignedMinValue(32),
1474 APInt::getSignedMaxValue(32) - 4));
1475 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1476 Instruction::Add, OneToFive, OBO::NoUnsignedWrap),
1477 ConstantRange(APInt::getMinValue(32), APInt::getMinValue(32) - 5));
1478 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1479 Instruction::Sub, OneToFive, OBO::NoSignedWrap),
1480 ConstantRange(APInt::getSignedMinValue(32) + 5,
1481 APInt::getSignedMinValue(32)));
1482 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1483 Instruction::Sub, OneToFive, OBO::NoUnsignedWrap),
1484 ConstantRange(APInt::getMinValue(32) + 5, APInt::getMinValue(32)));
1485
1486 ConstantRange MinusFiveToMinusTwo(APInt(32, -5), APInt(32, -1));
1487 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1488 Instruction::Add, MinusFiveToMinusTwo, OBO::NoSignedWrap),
1489 ConstantRange(APInt::getSignedMinValue(32) + 5,
1490 APInt::getSignedMinValue(32)));
1491 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1492 Instruction::Add, MinusFiveToMinusTwo, OBO::NoUnsignedWrap),
1493 ConstantRange(APInt(32, 0), APInt(32, 2)));
1494 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1495 Instruction::Sub, MinusFiveToMinusTwo, OBO::NoSignedWrap),
1496 ConstantRange(APInt::getSignedMinValue(32),
1497 APInt::getSignedMaxValue(32) - 4));
1498 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1499 Instruction::Sub, MinusFiveToMinusTwo, OBO::NoUnsignedWrap),
1500 ConstantRange(APInt::getMaxValue(32) - 1,
1501 APInt::getMinValue(32)));
1502
1503 ConstantRange MinusOneToOne(APInt(32, -1), APInt(32, 2));
1504 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1505 Instruction::Add, MinusOneToOne, OBO::NoSignedWrap),
1506 ConstantRange(APInt::getSignedMinValue(32) + 1,
1507 APInt::getSignedMinValue(32) - 1));
1508 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1509 Instruction::Add, MinusOneToOne, OBO::NoUnsignedWrap),
1510 ConstantRange(APInt(32, 0), APInt(32, 1)));
1511 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1512 Instruction::Sub, MinusOneToOne, OBO::NoSignedWrap),
1513 ConstantRange(APInt::getSignedMinValue(32) + 1,
1514 APInt::getSignedMinValue(32) - 1));
1515 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1516 Instruction::Sub, MinusOneToOne, OBO::NoUnsignedWrap),
1517 ConstantRange(APInt::getMaxValue(32),
1518 APInt::getMinValue(32)));
1519
1520 ConstantRange One(APInt(32, 1), APInt(32, 2));
1521 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1522 Instruction::Add, One, OBO::NoSignedWrap),
1523 ConstantRange(APInt::getSignedMinValue(32),
1524 APInt::getSignedMaxValue(32)));
1525 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1526 Instruction::Add, One, OBO::NoUnsignedWrap),
1527 ConstantRange(APInt::getMinValue(32), APInt::getMaxValue(32)));
1528 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1529 Instruction::Sub, One, OBO::NoSignedWrap),
1530 ConstantRange(APInt::getSignedMinValue(32) + 1,
1531 APInt::getSignedMinValue(32)));
1532 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1533 Instruction::Sub, One, OBO::NoUnsignedWrap),
1534 ConstantRange(APInt::getMinValue(32) + 1, APInt::getMinValue(32)));
1535
1536 ConstantRange OneLessThanBitWidth(APInt(32, 0), APInt(32, 31) + 1);
1537 ConstantRange UpToBitWidth(APInt(32, 0), APInt(32, 32) + 1);
1538 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1539 Instruction::Shl, UpToBitWidth, OBO::NoUnsignedWrap),
1540 ConstantRange::makeGuaranteedNoWrapRegion(
1541 Instruction::Shl, OneLessThanBitWidth, OBO::NoUnsignedWrap));
1542 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1543 Instruction::Shl, UpToBitWidth, OBO::NoSignedWrap),
1544 ConstantRange::makeGuaranteedNoWrapRegion(
1545 Instruction::Shl, OneLessThanBitWidth, OBO::NoSignedWrap));
1546 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1547 Instruction::Shl, UpToBitWidth, OBO::NoUnsignedWrap),
1548 ConstantRange(APInt(32, 0), APInt(32, 1) + 1));
1549 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1550 Instruction::Shl, UpToBitWidth, OBO::NoSignedWrap),
1551 ConstantRange(APInt(32, -1), APInt(32, 0) + 1));
1552
1553 EXPECT_EQ(
1554 ConstantRange::makeGuaranteedNoWrapRegion(
1555 Instruction::Shl, ConstantRange::getFull(32), OBO::NoUnsignedWrap),
1556 ConstantRange::makeGuaranteedNoWrapRegion(
1557 Instruction::Shl, OneLessThanBitWidth, OBO::NoUnsignedWrap));
1558 EXPECT_EQ(
1559 ConstantRange::makeGuaranteedNoWrapRegion(
1560 Instruction::Shl, ConstantRange::getFull(32), OBO::NoSignedWrap),
1561 ConstantRange::makeGuaranteedNoWrapRegion(
1562 Instruction::Shl, OneLessThanBitWidth, OBO::NoSignedWrap));
1563
1564 ConstantRange IllegalShAmt(APInt(32, 32), APInt(32, 0) + 1);
1565 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1566 Instruction::Shl, IllegalShAmt, OBO::NoUnsignedWrap),
1567 ConstantRange::getFull(32));
1568 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1569 Instruction::Shl, IllegalShAmt, OBO::NoSignedWrap),
1570 ConstantRange::getFull(32));
1571
1572 EXPECT_EQ(
1573 ConstantRange::makeGuaranteedNoWrapRegion(
1574 Instruction::Shl, ConstantRange(APInt(32, -32), APInt(32, 16) + 1),
1575 OBO::NoUnsignedWrap),
1576 ConstantRange::makeGuaranteedNoWrapRegion(
1577 Instruction::Shl, ConstantRange(APInt(32, 0), APInt(32, 16) + 1),
1578 OBO::NoUnsignedWrap));
1579 EXPECT_EQ(
1580 ConstantRange::makeGuaranteedNoWrapRegion(
1581 Instruction::Shl, ConstantRange(APInt(32, -32), APInt(32, 16) + 1),
1582 OBO::NoSignedWrap),
1583 ConstantRange::makeGuaranteedNoWrapRegion(
1584 Instruction::Shl, ConstantRange(APInt(32, 0), APInt(32, 16) + 1),
1585 OBO::NoSignedWrap));
1586
1587 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1588 Instruction::Shl,
1589 ConstantRange(APInt(32, -32), APInt(32, 16) + 1),
1590 OBO::NoUnsignedWrap),
1591 ConstantRange(APInt(32, 0), APInt(32, 65535) + 1));
1592 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion(
1593 Instruction::Shl,
1594 ConstantRange(APInt(32, -32), APInt(32, 16) + 1),
1595 OBO::NoSignedWrap),
1596 ConstantRange(APInt(32, -32768), APInt(32, 32767) + 1));
1597 }
1598
1599 template<typename Fn>
1600 void TestNoWrapRegionExhaustive(Instruction::BinaryOps BinOp,
1601 unsigned NoWrapKind, Fn OverflowFn) {
1602 unsigned Bits = 5;
1603 EnumerateConstantRanges(Bits, [&](const ConstantRange &CR) {
1604 if (CR.isEmptySet())
1605 return;
1606 if (Instruction::isShift(BinOp) && CR.getUnsignedMax().uge(Bits))
1607 return;
1608
1609 ConstantRange NoWrap =
1610 ConstantRange::makeGuaranteedNoWrapRegion(BinOp, CR, NoWrapKind);
1611 ConstantRange Full = ConstantRange::getFull(Bits);
1612 ForeachNumInConstantRange(Full, [&](const APInt &N1) {
1613 bool NoOverflow = true;
1614 bool Overflow = true;
1615 ForeachNumInConstantRange(CR, [&](const APInt &N2) {
1616 if (OverflowFn(N1, N2))
1617 NoOverflow = false;
1618 else
1619 Overflow = false;
1620 });
1621 EXPECT_EQ(NoOverflow, NoWrap.contains(N1));
1622
1623 // The no-wrap range is exact for single-element ranges.
1624 if (CR.isSingleElement()) {
1625 EXPECT_EQ(Overflow, !NoWrap.contains(N1));
1626 }
1627 });
1628 });
1629 }
1630
1631 // Show that makeGuaranteedNoWrapRegion() is maximal, and for single-element
1632 // ranges also exact.
1633 TEST(ConstantRange, NoWrapRegionExhaustive) {
1634 TestNoWrapRegionExhaustive(
1635 Instruction::Add, OverflowingBinaryOperator::NoUnsignedWrap,
1636 [](const APInt &N1, const APInt &N2) {
1637 bool Overflow;
1638 (void) N1.uadd_ov(N2, Overflow);
1639 return Overflow;
1640 });
1641 TestNoWrapRegionExhaustive(
1642 Instruction::Add, OverflowingBinaryOperator::NoSignedWrap,
1643 [](const APInt &N1, const APInt &N2) {
1644 bool Overflow;
1645 (void) N1.sadd_ov(N2, Overflow);
1646 return Overflow;
1647 });
1648 TestNoWrapRegionExhaustive(
1649 Instruction::Sub, OverflowingBinaryOperator::NoUnsignedWrap,
1650 [](const APInt &N1, const APInt &N2) {
1651 bool Overflow;
1652 (void) N1.usub_ov(N2, Overflow);
1653 return Overflow;
1654 });
1655 TestNoWrapRegionExhaustive(
1656 Instruction::Sub, OverflowingBinaryOperator::NoSignedWrap,
1657 [](const APInt &N1, const APInt &N2) {
1658 bool Overflow;
1659 (void) N1.ssub_ov(N2, Overflow);
1660 return Overflow;
1661 });
1662 TestNoWrapRegionExhaustive(
1663 Instruction::Mul, OverflowingBinaryOperator::NoUnsignedWrap,
1664 [](const APInt &N1, const APInt &N2) {
1665 bool Overflow;
1666 (void) N1.umul_ov(N2, Overflow);
1667 return Overflow;
1668 });
1669 TestNoWrapRegionExhaustive(
1670 Instruction::Mul, OverflowingBinaryOperator::NoSignedWrap,
1671 [](const APInt &N1, const APInt &N2) {
1672 bool Overflow;
1673 (void) N1.smul_ov(N2, Overflow);
1674 return Overflow;
1675 });
1676 TestNoWrapRegionExhaustive(Instruction::Shl,
1677 OverflowingBinaryOperator::NoUnsignedWrap,
1678 [](const APInt &N1, const APInt &N2) {
1679 bool Overflow;
1680 (void)N1.ushl_ov(N2, Overflow);
1681 return Overflow;
1682 });
1683 TestNoWrapRegionExhaustive(Instruction::Shl,
1684 OverflowingBinaryOperator::NoSignedWrap,
1685 [](const APInt &N1, const APInt &N2) {
1686 bool Overflow;
1687 (void)N1.sshl_ov(N2, Overflow);
1688 return Overflow;
1689 });
1690 }
1691
1692 TEST(ConstantRange, GetEquivalentICmp) {
1693 APInt RHS;
1694 CmpInst::Predicate Pred;
1695
1696 EXPECT_TRUE(ConstantRange(APInt::getMinValue(32), APInt(32, 100))
1697 .getEquivalentICmp(Pred, RHS));
1698 EXPECT_EQ(Pred, CmpInst::ICMP_ULT);
1699 EXPECT_EQ(RHS, APInt(32, 100));
1700
1701 EXPECT_TRUE(ConstantRange(APInt::getSignedMinValue(32), APInt(32, 100))
1702 .getEquivalentICmp(Pred, RHS));
1703 EXPECT_EQ(Pred, CmpInst::ICMP_SLT);
1704 EXPECT_EQ(RHS, APInt(32, 100));
1705
1706 EXPECT_TRUE(ConstantRange(APInt(32, 100), APInt::getMinValue(32))
1707 .getEquivalentICmp(Pred, RHS));
1708 EXPECT_EQ(Pred, CmpInst::ICMP_UGE);
1709 EXPECT_EQ(RHS, APInt(32, 100));
1710
1711 EXPECT_TRUE(ConstantRange(APInt(32, 100), APInt::getSignedMinValue(32))
1712 .getEquivalentICmp(Pred, RHS));
1713 EXPECT_EQ(Pred, CmpInst::ICMP_SGE);
1714 EXPECT_EQ(RHS, APInt(32, 100));
1715
1716 EXPECT_TRUE(
1717 ConstantRange(32, /*isFullSet=*/true).getEquivalentICmp(Pred, RHS));
1718 EXPECT_EQ(Pred, CmpInst::ICMP_UGE);
1719 EXPECT_EQ(RHS, APInt(32, 0));
1720
1721 EXPECT_TRUE(
1722 ConstantRange(32, /*isFullSet=*/false).getEquivalentICmp(Pred, RHS));
1723 EXPECT_EQ(Pred, CmpInst::ICMP_ULT);
1724 EXPECT_EQ(RHS, APInt(32, 0));
1725
1726 EXPECT_FALSE(ConstantRange(APInt(32, 100), APInt(32, 200))
1727 .getEquivalentICmp(Pred, RHS));
1728
1729 EXPECT_FALSE(ConstantRange(APInt::getSignedMinValue(32) - APInt(32, 100),
1730 APInt::getSignedMinValue(32) + APInt(32, 100))
1731 .getEquivalentICmp(Pred, RHS));
1732
1733 EXPECT_FALSE(ConstantRange(APInt::getMinValue(32) - APInt(32, 100),
1734 APInt::getMinValue(32) + APInt(32, 100))
1735 .getEquivalentICmp(Pred, RHS));
1736
1737 EXPECT_TRUE(ConstantRange(APInt(32, 100)).getEquivalentICmp(Pred, RHS));
1738 EXPECT_EQ(Pred, CmpInst::ICMP_EQ);
1739 EXPECT_EQ(RHS, APInt(32, 100));
1740
1741 EXPECT_TRUE(
1742 ConstantRange(APInt(32, 100)).inverse().getEquivalentICmp(Pred, RHS));
1743 EXPECT_EQ(Pred, CmpInst::ICMP_NE);
1744 EXPECT_EQ(RHS, APInt(32, 100));
1745
1746 EXPECT_TRUE(
1747 ConstantRange(APInt(512, 100)).inverse().getEquivalentICmp(Pred, RHS));
1748 EXPECT_EQ(Pred, CmpInst::ICMP_NE);
1749 EXPECT_EQ(RHS, APInt(512, 100));
1750
1751 // NB! It would be correct for the following four calls to getEquivalentICmp
1752 // to return ordered predicates like CmpInst::ICMP_ULT or CmpInst::ICMP_UGT.
1753 // However, that's not the case today.
1754
1755 EXPECT_TRUE(ConstantRange(APInt(32, 0)).getEquivalentICmp(Pred, RHS));
1756 EXPECT_EQ(Pred, CmpInst::ICMP_EQ);
1757 EXPECT_EQ(RHS, APInt(32, 0));
1758
1759 EXPECT_TRUE(
1760 ConstantRange(APInt(32, 0)).inverse().getEquivalentICmp(Pred, RHS));
1761 EXPECT_EQ(Pred, CmpInst::ICMP_NE);
1762 EXPECT_EQ(RHS, APInt(32, 0));
1763
1764 EXPECT_TRUE(ConstantRange(APInt(32, -1)).getEquivalentICmp(Pred, RHS));
1765 EXPECT_EQ(Pred, CmpInst::ICMP_EQ);
1766 EXPECT_EQ(RHS, APInt(32, -1));
1767
1768 EXPECT_TRUE(
1769 ConstantRange(APInt(32, -1)).inverse().getEquivalentICmp(Pred, RHS));
1770 EXPECT_EQ(Pred, CmpInst::ICMP_NE);
1771 EXPECT_EQ(RHS, APInt(32, -1));
1772 }
1773
1774 #define EXPECT_MAY_OVERFLOW(op) \
1775 EXPECT_EQ(ConstantRange::OverflowResult::MayOverflow, (op))
1776 #define EXPECT_ALWAYS_OVERFLOWS_LOW(op) \
1777 EXPECT_EQ(ConstantRange::OverflowResult::AlwaysOverflowsLow, (op))
1778 #define EXPECT_ALWAYS_OVERFLOWS_HIGH(op) \
1779 EXPECT_EQ(ConstantRange::OverflowResult::AlwaysOverflowsHigh, (op))
1780 #define EXPECT_NEVER_OVERFLOWS(op) \
1781 EXPECT_EQ(ConstantRange::OverflowResult::NeverOverflows, (op))
1782
1783 TEST_F(ConstantRangeTest, UnsignedAddOverflow) {
1784 // Ill-defined - may overflow is a conservative result.
1785 EXPECT_MAY_OVERFLOW(Some.unsignedAddMayOverflow(Empty));
1786 EXPECT_MAY_OVERFLOW(Empty.unsignedAddMayOverflow(Some));
1787
1788 // Never overflow despite one full/wrap set.
1789 ConstantRange Zero(APInt::getNullValue(16));
1790 EXPECT_NEVER_OVERFLOWS(Full.unsignedAddMayOverflow(Zero));
1791 EXPECT_NEVER_OVERFLOWS(Wrap.unsignedAddMayOverflow(Zero));
1792 EXPECT_NEVER_OVERFLOWS(Zero.unsignedAddMayOverflow(Full));
1793 EXPECT_NEVER_OVERFLOWS(Zero.unsignedAddMayOverflow(Wrap));
1794
1795 // But usually full/wrap always may overflow.
1796 EXPECT_MAY_OVERFLOW(Full.unsignedAddMayOverflow(One));
1797 EXPECT_MAY_OVERFLOW(Wrap.unsignedAddMayOverflow(One));
1798 EXPECT_MAY_OVERFLOW(One.unsignedAddMayOverflow(Full));
1799 EXPECT_MAY_OVERFLOW(One.unsignedAddMayOverflow(Wrap));
1800
1801 ConstantRange A(APInt(16, 0xfd00), APInt(16, 0xfe00));
1802 ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201));
1803 ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202));
1804 EXPECT_NEVER_OVERFLOWS(A.unsignedAddMayOverflow(B1));
1805 EXPECT_MAY_OVERFLOW(A.unsignedAddMayOverflow(B2));
1806 EXPECT_NEVER_OVERFLOWS(B1.unsignedAddMayOverflow(A));
1807 EXPECT_MAY_OVERFLOW(B2.unsignedAddMayOverflow(A));
1808
1809 ConstantRange C1(APInt(16, 0x0299), APInt(16, 0x0400));
1810 ConstantRange C2(APInt(16, 0x0300), APInt(16, 0x0400));
1811 EXPECT_MAY_OVERFLOW(A.unsignedAddMayOverflow(C1));
1812 EXPECT_ALWAYS_OVERFLOWS_HIGH(A.unsignedAddMayOverflow(C2));
1813 EXPECT_MAY_OVERFLOW(C1.unsignedAddMayOverflow(A));
1814 EXPECT_ALWAYS_OVERFLOWS_HIGH(C2.unsignedAddMayOverflow(A));
1815 }
1816
1817 TEST_F(ConstantRangeTest, UnsignedSubOverflow) {
1818 // Ill-defined - may overflow is a conservative result.
1819 EXPECT_MAY_OVERFLOW(Some.unsignedSubMayOverflow(Empty));
1820 EXPECT_MAY_OVERFLOW(Empty.unsignedSubMayOverflow(Some));
1821
1822 // Never overflow despite one full/wrap set.
1823 ConstantRange Zero(APInt::getNullValue(16));
1824 ConstantRange Max(APInt::getAllOnesValue(16));
1825 EXPECT_NEVER_OVERFLOWS(Full.unsignedSubMayOverflow(Zero));
1826 EXPECT_NEVER_OVERFLOWS(Wrap.unsignedSubMayOverflow(Zero));
1827 EXPECT_NEVER_OVERFLOWS(Max.unsignedSubMayOverflow(Full));
1828 EXPECT_NEVER_OVERFLOWS(Max.unsignedSubMayOverflow(Wrap));
1829
1830 // But usually full/wrap always may overflow.
1831 EXPECT_MAY_OVERFLOW(Full.unsignedSubMayOverflow(One));
1832 EXPECT_MAY_OVERFLOW(Wrap.unsignedSubMayOverflow(One));
1833 EXPECT_MAY_OVERFLOW(One.unsignedSubMayOverflow(Full));
1834 EXPECT_MAY_OVERFLOW(One.unsignedSubMayOverflow(Wrap));
1835
1836 ConstantRange A(APInt(16, 0x0000), APInt(16, 0x0100));
1837 ConstantRange B(APInt(16, 0x0100), APInt(16, 0x0200));
1838 EXPECT_NEVER_OVERFLOWS(B.unsignedSubMayOverflow(A));
1839 EXPECT_ALWAYS_OVERFLOWS_LOW(A.unsignedSubMayOverflow(B));
1840
1841 ConstantRange A1(APInt(16, 0x0000), APInt(16, 0x0101));
1842 ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201));
1843 EXPECT_NEVER_OVERFLOWS(B1.unsignedSubMayOverflow(A1));
1844 EXPECT_MAY_OVERFLOW(A1.unsignedSubMayOverflow(B1));
1845
1846 ConstantRange A2(APInt(16, 0x0000), APInt(16, 0x0102));
1847 ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202));
1848 EXPECT_MAY_OVERFLOW(B2.unsignedSubMayOverflow(A2));
1849 EXPECT_MAY_OVERFLOW(A2.unsignedSubMayOverflow(B2));
1850 }
1851
1852 TEST_F(ConstantRangeTest, SignedAddOverflow) {
1853 // Ill-defined - may overflow is a conservative result.
1854 EXPECT_MAY_OVERFLOW(Some.signedAddMayOverflow(Empty));
1855 EXPECT_MAY_OVERFLOW(Empty.signedAddMayOverflow(Some));
1856
1857 // Never overflow despite one full/wrap set.
1858 ConstantRange Zero(APInt::getNullValue(16));
1859 EXPECT_NEVER_OVERFLOWS(Full.signedAddMayOverflow(Zero));
1860 EXPECT_NEVER_OVERFLOWS(Wrap.signedAddMayOverflow(Zero));
1861 EXPECT_NEVER_OVERFLOWS(Zero.signedAddMayOverflow(Full));
1862 EXPECT_NEVER_OVERFLOWS(Zero.signedAddMayOverflow(Wrap));
1863
1864 // But usually full/wrap always may overflow.
1865 EXPECT_MAY_OVERFLOW(Full.signedAddMayOverflow(One));
1866 EXPECT_MAY_OVERFLOW(Wrap.signedAddMayOverflow(One));
1867 EXPECT_MAY_OVERFLOW(One.signedAddMayOverflow(Full));
1868 EXPECT_MAY_OVERFLOW(One.signedAddMayOverflow(Wrap));
1869
1870 ConstantRange A(APInt(16, 0x7d00), APInt(16, 0x7e00));
1871 ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201));
1872 ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202));
1873 EXPECT_NEVER_OVERFLOWS(A.signedAddMayOverflow(B1));
1874 EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B2));
1875 ConstantRange B3(APInt(16, 0x8000), APInt(16, 0x0201));
1876 ConstantRange B4(APInt(16, 0x8000), APInt(16, 0x0202));
1877 EXPECT_NEVER_OVERFLOWS(A.signedAddMayOverflow(B3));
1878 EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B4));
1879 ConstantRange B5(APInt(16, 0x0299), APInt(16, 0x0400));
1880 ConstantRange B6(APInt(16, 0x0300), APInt(16, 0x0400));
1881 EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B5));
1882 EXPECT_ALWAYS_OVERFLOWS_HIGH(A.signedAddMayOverflow(B6));
1883
1884 ConstantRange C(APInt(16, 0x8200), APInt(16, 0x8300));
1885 ConstantRange D1(APInt(16, 0xfe00), APInt(16, 0xff00));
1886 ConstantRange D2(APInt(16, 0xfd99), APInt(16, 0xff00));
1887 EXPECT_NEVER_OVERFLOWS(C.signedAddMayOverflow(D1));
1888 EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D2));
1889 ConstantRange D3(APInt(16, 0xfe00), APInt(16, 0x8000));
1890 ConstantRange D4(APInt(16, 0xfd99), APInt(16, 0x8000));
1891 EXPECT_NEVER_OVERFLOWS(C.signedAddMayOverflow(D3));
1892 EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D4));
1893 ConstantRange D5(APInt(16, 0xfc00), APInt(16, 0xfd02));
1894 ConstantRange D6(APInt(16, 0xfc00), APInt(16, 0xfd01));
1895 EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D5));
1896 EXPECT_ALWAYS_OVERFLOWS_LOW(C.signedAddMayOverflow(D6));
1897
1898 ConstantRange E(APInt(16, 0xff00), APInt(16, 0x0100));
1899 EXPECT_NEVER_OVERFLOWS(E.signedAddMayOverflow(E));
1900 ConstantRange F(APInt(16, 0xf000), APInt(16, 0x7000));
1901 EXPECT_MAY_OVERFLOW(F.signedAddMayOverflow(F));
1902 }
1903
1904 TEST_F(ConstantRangeTest, SignedSubOverflow) {
1905 // Ill-defined - may overflow is a conservative result.
1906 EXPECT_MAY_OVERFLOW(Some.signedSubMayOverflow(Empty));
1907 EXPECT_MAY_OVERFLOW(Empty.signedSubMayOverflow(Some));
1908
1909 // Never overflow despite one full/wrap set.
1910 ConstantRange Zero(APInt::getNullValue(16));
1911 EXPECT_NEVER_OVERFLOWS(Full.signedSubMayOverflow(Zero));
1912 EXPECT_NEVER_OVERFLOWS(Wrap.signedSubMayOverflow(Zero));
1913
1914 // But usually full/wrap always may overflow.
1915 EXPECT_MAY_OVERFLOW(Full.signedSubMayOverflow(One));
1916 EXPECT_MAY_OVERFLOW(Wrap.signedSubMayOverflow(One));
1917 EXPECT_MAY_OVERFLOW(One.signedSubMayOverflow(Full));
1918 EXPECT_MAY_OVERFLOW(One.signedSubMayOverflow(Wrap));
1919
1920 ConstantRange A(APInt(16, 0x7d00), APInt(16, 0x7e00));
1921 ConstantRange B1(APInt(16, 0xfe00), APInt(16, 0xff00));
1922 ConstantRange B2(APInt(16, 0xfd99), APInt(16, 0xff00));
1923 EXPECT_NEVER_OVERFLOWS(A.signedSubMayOverflow(B1));
1924 EXPECT_MAY_OVERFLOW(A.signedSubMayOverflow(B2));
1925 ConstantRange B3(APInt(16, 0xfc00), APInt(16, 0xfd02));
1926 ConstantRange B4(APInt(16, 0xfc00), APInt(16, 0xfd01));
1927 EXPECT_MAY_OVERFLOW(A.signedSubMayOverflow(B3));
1928 EXPECT_ALWAYS_OVERFLOWS_HIGH(A.signedSubMayOverflow(B4));
1929
1930 ConstantRange C(APInt(16, 0x8200), APInt(16, 0x8300));
1931 ConstantRange D1(APInt(16, 0x0100), APInt(16, 0x0201));
1932 ConstantRange D2(APInt(16, 0x0100), APInt(16, 0x0202));
1933 EXPECT_NEVER_OVERFLOWS(C.signedSubMayOverflow(D1));
1934 EXPECT_MAY_OVERFLOW(C.signedSubMayOverflow(D2));
1935 ConstantRange D3(APInt(16, 0x0299), APInt(16, 0x0400));
1936 ConstantRange D4(APInt(16, 0x0300), APInt(16, 0x0400));
1937 EXPECT_MAY_OVERFLOW(C.signedSubMayOverflow(D3));
1938 EXPECT_ALWAYS_OVERFLOWS_LOW(C.signedSubMayOverflow(D4));
1939
1940 ConstantRange E(APInt(16, 0xff00), APInt(16, 0x0100));
1941 EXPECT_NEVER_OVERFLOWS(E.signedSubMayOverflow(E));
1942 ConstantRange F(APInt(16, 0xf000), APInt(16, 0x7001));
1943 EXPECT_MAY_OVERFLOW(F.signedSubMayOverflow(F));
1944 }
1945
1946 template<typename Fn1, typename Fn2>
1947 static void TestOverflowExhaustive(Fn1 OverflowFn, Fn2 MayOverflowFn) {
1948 // Constant range overflow checks are tested exhaustively on 4-bit numbers.
1949 unsigned Bits = 4;
1950 EnumerateTwoConstantRanges(Bits, [=](const ConstantRange &CR1,
1951 const ConstantRange &CR2) {
1952 // Loop over all N1 in CR1 and N2 in CR2 and check whether any of the
1953 // operations have overflow / have no overflow.
1954 bool RangeHasOverflowLow = false;
1955 bool RangeHasOverflowHigh = false;
1956 bool RangeHasNoOverflow = false;
1957 ForeachNumInConstantRange(CR1, [&](const APInt &N1) {
1958 ForeachNumInConstantRange(CR2, [&](const APInt &N2) {
1959 bool IsOverflowHigh;
1960 if (!OverflowFn(IsOverflowHigh, N1, N2)) {
1961 RangeHasNoOverflow = true;
1962 return;
1963 }
1964
1965 if (IsOverflowHigh)
1966 RangeHasOverflowHigh = true;
1967 else
1968 RangeHasOverflowLow = true;
1969 });
1970 });
1971
1972 ConstantRange::OverflowResult OR = MayOverflowFn(CR1, CR2);
1973 switch (OR) {
1974 case ConstantRange::OverflowResult::AlwaysOverflowsLow:
1975 EXPECT_TRUE(RangeHasOverflowLow);
1976 EXPECT_FALSE(RangeHasOverflowHigh);
1977 EXPECT_FALSE(RangeHasNoOverflow);
1978 break;
1979 case ConstantRange::OverflowResult::AlwaysOverflowsHigh:
1980 EXPECT_TRUE(RangeHasOverflowHigh);
1981 EXPECT_FALSE(RangeHasOverflowLow);
1982 EXPECT_FALSE(RangeHasNoOverflow);
1983 break;
1984 case ConstantRange::OverflowResult::NeverOverflows:
1985 EXPECT_FALSE(RangeHasOverflowLow);
1986 EXPECT_FALSE(RangeHasOverflowHigh);
1987 EXPECT_TRUE(RangeHasNoOverflow);
1988 break;
1989 case ConstantRange::OverflowResult::MayOverflow:
1990 // We return MayOverflow for empty sets as a conservative result,
1991 // but of course neither the RangeHasOverflow nor the
1992 // RangeHasNoOverflow flags will be set.
1993 if (CR1.isEmptySet() || CR2.isEmptySet())
1994 break;
1995
1996 EXPECT_TRUE(RangeHasOverflowLow || RangeHasOverflowHigh);
1997 EXPECT_TRUE(RangeHasNoOverflow);
1998 break;
1999 }
2000 });
2001 }
2002
2003 TEST_F(ConstantRangeTest, UnsignedAddOverflowExhaustive) {
2004 TestOverflowExhaustive(
2005 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) {
2006 bool Overflow;
2007 (void) N1.uadd_ov(N2, Overflow);
2008 IsOverflowHigh = true;
2009 return Overflow;
2010 },
2011 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2012 return CR1.unsignedAddMayOverflow(CR2);
2013 });
2014 }
2015
2016 TEST_F(ConstantRangeTest, UnsignedSubOverflowExhaustive) {
2017 TestOverflowExhaustive(
2018 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) {
2019 bool Overflow;
2020 (void) N1.usub_ov(N2, Overflow);
2021 IsOverflowHigh = false;
2022 return Overflow;
2023 },
2024 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2025 return CR1.unsignedSubMayOverflow(CR2);
2026 });
2027 }
2028
2029 TEST_F(ConstantRangeTest, UnsignedMulOverflowExhaustive) {
2030 TestOverflowExhaustive(
2031 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) {
2032 bool Overflow;
2033 (void) N1.umul_ov(N2, Overflow);
2034 IsOverflowHigh = true;
2035 return Overflow;
2036 },
2037 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2038 return CR1.unsignedMulMayOverflow(CR2);
2039 });
2040 }
2041
2042 TEST_F(ConstantRangeTest, SignedAddOverflowExhaustive) {
2043 TestOverflowExhaustive(
2044 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) {
2045 bool Overflow;
2046 (void) N1.sadd_ov(N2, Overflow);
2047 IsOverflowHigh = N1.isNonNegative();
2048 return Overflow;
2049 },
2050 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2051 return CR1.signedAddMayOverflow(CR2);
2052 });
2053 }
2054
2055 TEST_F(ConstantRangeTest, SignedSubOverflowExhaustive) {
2056 TestOverflowExhaustive(
2057 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) {
2058 bool Overflow;
2059 (void) N1.ssub_ov(N2, Overflow);
2060 IsOverflowHigh = N1.isNonNegative();
2061 return Overflow;
2062 },
2063 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2064 return CR1.signedSubMayOverflow(CR2);
2065 });
2066 }
2067
2068 TEST_F(ConstantRangeTest, FromKnownBits) {
2069 KnownBits Unknown(16);
2070 EXPECT_EQ(Full, ConstantRange::fromKnownBits(Unknown, /*signed*/false));
2071 EXPECT_EQ(Full, ConstantRange::fromKnownBits(Unknown, /*signed*/true));
2072
2073 // .10..01. -> unsigned 01000010 (66) to 11011011 (219)
2074 // -> signed 11000010 (194) to 01011011 (91)
2075 KnownBits Known(8);
2076 Known.Zero = 36;
2077 Known.One = 66;
2078 ConstantRange Unsigned(APInt(8, 66), APInt(8, 219 + 1));
2079 ConstantRange Signed(APInt(8, 194), APInt(8, 91 + 1));
2080 EXPECT_EQ(Unsigned, ConstantRange::fromKnownBits(Known, /*signed*/false));
2081 EXPECT_EQ(Signed, ConstantRange::fromKnownBits(Known, /*signed*/true));
2082
2083 // 1.10.10. -> 10100100 (164) to 11101101 (237)
2084 Known.Zero = 18;
2085 Known.One = 164;
2086 ConstantRange CR1(APInt(8, 164), APInt(8, 237 + 1));
2087 EXPECT_EQ(CR1, ConstantRange::fromKnownBits(Known, /*signed*/false));
2088 EXPECT_EQ(CR1, ConstantRange::fromKnownBits(Known, /*signed*/true));
2089
2090 // 01.0.1.0 -> 01000100 (68) to 01101110 (110)
2091 Known.Zero = 145;
2092 Known.One = 68;
2093 ConstantRange CR2(APInt(8, 68), APInt(8, 110 + 1));
2094 EXPECT_EQ(CR2, ConstantRange::fromKnownBits(Known, /*signed*/false));
2095 EXPECT_EQ(CR2, ConstantRange::fromKnownBits(Known, /*signed*/true));
2096 }
2097
2098 TEST_F(ConstantRangeTest, FromKnownBitsExhaustive) {
2099 unsigned Bits = 4;
2100 unsigned Max = 1 << Bits;
2101 KnownBits Known(Bits);
2102 for (unsigned Zero = 0; Zero < Max; ++Zero) {
2103 for (unsigned One = 0; One < Max; ++One) {
2104 Known.Zero = Zero;
2105 Known.One = One;
2106 if (Known.hasConflict() || Known.isUnknown())
2107 continue;
2108
2109 APInt MinUnsigned = APInt::getMaxValue(Bits);
2110 APInt MaxUnsigned = APInt::getMinValue(Bits);
2111 APInt MinSigned = APInt::getSignedMaxValue(Bits);
2112 APInt MaxSigned = APInt::getSignedMinValue(Bits);
2113 for (unsigned N = 0; N < Max; ++N) {
2114 APInt Num(Bits, N);
2115 if ((Num & Known.Zero) != 0 || (~Num & Known.One) != 0)
2116 continue;
2117
2118 if (Num.ult(MinUnsigned)) MinUnsigned = Num;
2119 if (Num.ugt(MaxUnsigned)) MaxUnsigned = Num;
2120 if (Num.slt(MinSigned)) MinSigned = Num;
2121 if (Num.sgt(MaxSigned)) MaxSigned = Num;
2122 }
2123
2124 ConstantRange UnsignedCR(MinUnsigned, MaxUnsigned + 1);
2125 ConstantRange SignedCR(MinSigned, MaxSigned + 1);
2126 EXPECT_EQ(UnsignedCR, ConstantRange::fromKnownBits(Known, false));
2127 EXPECT_EQ(SignedCR, ConstantRange::fromKnownBits(Known, true));
2128 }
2129 }
2130 }
2131
2132 TEST_F(ConstantRangeTest, Negative) {
2133 // All elements in an empty set (of which there are none) are both negative
2134 // and non-negative. Empty & full sets checked explicitly for clarity, but
2135 // they are also covered by the exhaustive test below.
2136 EXPECT_TRUE(Empty.isAllNegative());
2137 EXPECT_TRUE(Empty.isAllNonNegative());
2138 EXPECT_FALSE(Full.isAllNegative());
2139 EXPECT_FALSE(Full.isAllNonNegative());
2140
2141 unsigned Bits = 4;
2142 EnumerateConstantRanges(Bits, [](const ConstantRange &CR) {
2143 bool AllNegative = true;
2144 bool AllNonNegative = true;
2145 ForeachNumInConstantRange(CR, [&](const APInt &N) {
2146 if (!N.isNegative())
2147 AllNegative = false;
2148 if (!N.isNonNegative())
2149 AllNonNegative = false;
2150 });
2151 assert((CR.isEmptySet() || !AllNegative || !AllNonNegative) &&
2152 "Only empty set can be both all negative and all non-negative");
2153
2154 EXPECT_EQ(AllNegative, CR.isAllNegative());
2155 EXPECT_EQ(AllNonNegative, CR.isAllNonNegative());
2156 });
2157 }
2158
2159 TEST_F(ConstantRangeTest, UAddSat) {
2160 TestUnsignedBinOpExhaustive(
2161 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2162 return CR1.uadd_sat(CR2);
2163 },
2164 [](const APInt &N1, const APInt &N2) {
2165 return N1.uadd_sat(N2);
2166 });
2167 }
2168
2169 TEST_F(ConstantRangeTest, USubSat) {
2170 TestUnsignedBinOpExhaustive(
2171 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2172 return CR1.usub_sat(CR2);
2173 },
2174 [](const APInt &N1, const APInt &N2) {
2175 return N1.usub_sat(N2);
2176 });
2177 }
2178
2179 TEST_F(ConstantRangeTest, SAddSat) {
2180 TestSignedBinOpExhaustive(
2181 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2182 return CR1.sadd_sat(CR2);
2183 },
2184 [](const APInt &N1, const APInt &N2) {
2185 return N1.sadd_sat(N2);
2186 });
2187 }
2188
2189 TEST_F(ConstantRangeTest, SSubSat) {
2190 TestSignedBinOpExhaustive(
2191 [](const ConstantRange &CR1, const ConstantRange &CR2) {
2192 return CR1.ssub_sat(CR2);
2193 },
2194 [](const APInt &N1, const APInt &N2) {
2195 return N1.ssub_sat(N2);
2196 });
2197 }
2198
2199 TEST_F(ConstantRangeTest, Abs) {
2200 unsigned Bits = 4;
2201 EnumerateConstantRanges(Bits, [&](const ConstantRange &CR) {
2202 // We're working with unsigned integers here, because it makes the signed
2203 // min case non-wrapping.
2204 APInt Min = APInt::getMaxValue(Bits);
2205 APInt Max = APInt::getMinValue(Bits);
2206 ForeachNumInConstantRange(CR, [&](const APInt &N) {
2207 APInt AbsN = N.abs();
2208 if (AbsN.ult(Min))
2209 Min = AbsN;
2210 if (AbsN.ugt(Max))
2211 Max = AbsN;
2212 });
2213
2214 ConstantRange AbsCR = CR.abs();
2215 if (Min.ugt(Max)) {
2216 EXPECT_TRUE(AbsCR.isEmptySet());
2217 return;
2218 }
2219
2220 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1);
2221 EXPECT_EQ(Exact, AbsCR);
2222 });
2223 }
2224
2225 } // anonymous namespace
The low level virtual machine