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 TestUnsignedUnaryOpExhaustive( 64 Fn1 RangeFn, Fn2 IntFn, bool SkipSignedIntMin = false) { 65 unsigned Bits = 4; 66 EnumerateConstantRanges(Bits, [&](const ConstantRange &CR) { 67 APInt Min = APInt::getMaxValue(Bits); 68 APInt Max = APInt::getMinValue(Bits); 69 ForeachNumInConstantRange(CR, [&](const APInt &N) { 70 if (SkipSignedIntMin && N.isMinSignedValue()) 71 return; 72 73 APInt AbsN = IntFn(N); 74 if (AbsN.ult(Min)) 75 Min = AbsN; 76 if (AbsN.ugt(Max)) 77 Max = AbsN; 78 }); 79 80 ConstantRange ResultCR = RangeFn(CR); 81 if (Min.ugt(Max)) { 82 EXPECT_TRUE(ResultCR.isEmptySet()); 83 return; 84 } 85 86 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1); 87 EXPECT_EQ(Exact, ResultCR); 88 }); 89 } 90 91 template<typename Fn1, typename Fn2> 92 static void TestUnsignedBinOpExhaustive( 93 Fn1 RangeFn, Fn2 IntFn, 94 bool SkipZeroRHS = false, bool CorrectnessOnly = false) { 95 unsigned Bits = 4; 96 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1, 97 const ConstantRange &CR2) { 98 APInt Min = APInt::getMaxValue(Bits); 99 APInt Max = APInt::getMinValue(Bits); 100 ForeachNumInConstantRange(CR1, [&](const APInt &N1) { 101 ForeachNumInConstantRange(CR2, [&](const APInt &N2) { 102 if (SkipZeroRHS && N2 == 0) 103 return; 104 105 APInt N = IntFn(N1, N2); 106 if (N.ult(Min)) 107 Min = N; 108 if (N.ugt(Max)) 109 Max = N; 110 }); 111 }); 112 113 ConstantRange CR = RangeFn(CR1, CR2); 114 if (Min.ugt(Max)) { 115 EXPECT_TRUE(CR.isEmptySet()); 116 return; 117 } 118 119 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1); 120 if (CorrectnessOnly) { 121 EXPECT_TRUE(CR.contains(Exact)); 122 } else { 123 EXPECT_EQ(Exact, CR); 124 } 125 }); 126 } 127 128 template<typename Fn1, typename Fn2> 129 static void TestSignedBinOpExhaustive( 130 Fn1 RangeFn, Fn2 IntFn, 131 bool SkipZeroRHS = false, bool CorrectnessOnly = false) { 132 unsigned Bits = 4; 133 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1, 134 const ConstantRange &CR2) { 135 APInt Min = APInt::getSignedMaxValue(Bits); 136 APInt Max = APInt::getSignedMinValue(Bits); 137 ForeachNumInConstantRange(CR1, [&](const APInt &N1) { 138 ForeachNumInConstantRange(CR2, [&](const APInt &N2) { 139 if (SkipZeroRHS && N2 == 0) 140 return; 141 142 APInt N = IntFn(N1, N2); 143 if (N.slt(Min)) 144 Min = N; 145 if (N.sgt(Max)) 146 Max = N; 147 }); 148 }); 149 150 ConstantRange CR = RangeFn(CR1, CR2); 151 if (Min.sgt(Max)) { 152 EXPECT_TRUE(CR.isEmptySet()); 153 return; 154 } 155 156 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1); 157 if (CorrectnessOnly) { 158 EXPECT_TRUE(CR.contains(Exact)); 159 } else { 160 EXPECT_EQ(Exact, CR); 161 } 162 }); 163 } 164 165 ConstantRange ConstantRangeTest::Full(16, true); 166 ConstantRange ConstantRangeTest::Empty(16, false); 167 ConstantRange ConstantRangeTest::One(APInt(16, 0xa)); 168 ConstantRange ConstantRangeTest::Some(APInt(16, 0xa), APInt(16, 0xaaa)); 169 ConstantRange ConstantRangeTest::Wrap(APInt(16, 0xaaa), APInt(16, 0xa)); 170 171 TEST_F(ConstantRangeTest, Basics) { 172 EXPECT_TRUE(Full.isFullSet()); 173 EXPECT_FALSE(Full.isEmptySet()); 174 EXPECT_TRUE(Full.inverse().isEmptySet()); 175 EXPECT_FALSE(Full.isWrappedSet()); 176 EXPECT_TRUE(Full.contains(APInt(16, 0x0))); 177 EXPECT_TRUE(Full.contains(APInt(16, 0x9))); 178 EXPECT_TRUE(Full.contains(APInt(16, 0xa))); 179 EXPECT_TRUE(Full.contains(APInt(16, 0xaa9))); 180 EXPECT_TRUE(Full.contains(APInt(16, 0xaaa))); 181 182 EXPECT_FALSE(Empty.isFullSet()); 183 EXPECT_TRUE(Empty.isEmptySet()); 184 EXPECT_TRUE(Empty.inverse().isFullSet()); 185 EXPECT_FALSE(Empty.isWrappedSet()); 186 EXPECT_FALSE(Empty.contains(APInt(16, 0x0))); 187 EXPECT_FALSE(Empty.contains(APInt(16, 0x9))); 188 EXPECT_FALSE(Empty.contains(APInt(16, 0xa))); 189 EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9))); 190 EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa))); 191 192 EXPECT_FALSE(One.isFullSet()); 193 EXPECT_FALSE(One.isEmptySet()); 194 EXPECT_FALSE(One.isWrappedSet()); 195 EXPECT_FALSE(One.contains(APInt(16, 0x0))); 196 EXPECT_FALSE(One.contains(APInt(16, 0x9))); 197 EXPECT_TRUE(One.contains(APInt(16, 0xa))); 198 EXPECT_FALSE(One.contains(APInt(16, 0xaa9))); 199 EXPECT_FALSE(One.contains(APInt(16, 0xaaa))); 200 EXPECT_FALSE(One.inverse().contains(APInt(16, 0xa))); 201 202 EXPECT_FALSE(Some.isFullSet()); 203 EXPECT_FALSE(Some.isEmptySet()); 204 EXPECT_FALSE(Some.isWrappedSet()); 205 EXPECT_FALSE(Some.contains(APInt(16, 0x0))); 206 EXPECT_FALSE(Some.contains(APInt(16, 0x9))); 207 EXPECT_TRUE(Some.contains(APInt(16, 0xa))); 208 EXPECT_TRUE(Some.contains(APInt(16, 0xaa9))); 209 EXPECT_FALSE(Some.contains(APInt(16, 0xaaa))); 210 211 EXPECT_FALSE(Wrap.isFullSet()); 212 EXPECT_FALSE(Wrap.isEmptySet()); 213 EXPECT_TRUE(Wrap.isWrappedSet()); 214 EXPECT_TRUE(Wrap.contains(APInt(16, 0x0))); 215 EXPECT_TRUE(Wrap.contains(APInt(16, 0x9))); 216 EXPECT_FALSE(Wrap.contains(APInt(16, 0xa))); 217 EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9))); 218 EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa))); 219 } 220 221 TEST_F(ConstantRangeTest, Equality) { 222 EXPECT_EQ(Full, Full); 223 EXPECT_EQ(Empty, Empty); 224 EXPECT_EQ(One, One); 225 EXPECT_EQ(Some, Some); 226 EXPECT_EQ(Wrap, Wrap); 227 EXPECT_NE(Full, Empty); 228 EXPECT_NE(Full, One); 229 EXPECT_NE(Full, Some); 230 EXPECT_NE(Full, Wrap); 231 EXPECT_NE(Empty, One); 232 EXPECT_NE(Empty, Some); 233 EXPECT_NE(Empty, Wrap); 234 EXPECT_NE(One, Some); 235 EXPECT_NE(One, Wrap); 236 EXPECT_NE(Some, Wrap); 237 } 238 239 TEST_F(ConstantRangeTest, SingleElement) { 240 EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(nullptr)); 241 EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(nullptr)); 242 EXPECT_EQ(Full.getSingleMissingElement(), static_cast<APInt *>(nullptr)); 243 EXPECT_EQ(Empty.getSingleMissingElement(), static_cast<APInt *>(nullptr)); 244 245 EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa)); 246 EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(nullptr)); 247 EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(nullptr)); 248 249 EXPECT_EQ(One.getSingleMissingElement(), static_cast<APInt *>(nullptr)); 250 EXPECT_EQ(Some.getSingleMissingElement(), static_cast<APInt *>(nullptr)); 251 252 ConstantRange OneInverse = One.inverse(); 253 EXPECT_EQ(*OneInverse.getSingleMissingElement(), *One.getSingleElement()); 254 255 EXPECT_FALSE(Full.isSingleElement()); 256 EXPECT_FALSE(Empty.isSingleElement()); 257 EXPECT_TRUE(One.isSingleElement()); 258 EXPECT_FALSE(Some.isSingleElement()); 259 EXPECT_FALSE(Wrap.isSingleElement()); 260 } 261 262 TEST_F(ConstantRangeTest, GetMinsAndMaxes) { 263 EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX)); 264 EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa)); 265 EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9)); 266 EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX)); 267 268 EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0)); 269 EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa)); 270 EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa)); 271 EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0)); 272 273 EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX)); 274 EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa)); 275 EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9)); 276 EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX)); 277 278 EXPECT_EQ(Full.getSignedMin(), APInt(16, (uint64_t)INT16_MIN)); 279 EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa)); 280 EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa)); 281 EXPECT_EQ(Wrap.getSignedMin(), APInt(16, (uint64_t)INT16_MIN)); 282 283 // Found by Klee 284 EXPECT_EQ(ConstantRange(APInt(4, 7), APInt(4, 0)).getSignedMax(), 285 APInt(4, 7)); 286 } 287 288 TEST_F(ConstantRangeTest, SignWrapped) { 289 EXPECT_FALSE(Full.isSignWrappedSet()); 290 EXPECT_FALSE(Empty.isSignWrappedSet()); 291 EXPECT_FALSE(One.isSignWrappedSet()); 292 EXPECT_FALSE(Some.isSignWrappedSet()); 293 EXPECT_TRUE(Wrap.isSignWrappedSet()); 294 295 EXPECT_FALSE(ConstantRange(APInt(8, 127), APInt(8, 128)).isSignWrappedSet()); 296 EXPECT_TRUE(ConstantRange(APInt(8, 127), APInt(8, 129)).isSignWrappedSet()); 297 EXPECT_FALSE(ConstantRange(APInt(8, 128), APInt(8, 129)).isSignWrappedSet()); 298 EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 9)).isSignWrappedSet()); 299 EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 250)).isSignWrappedSet()); 300 EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 10)).isSignWrappedSet()); 301 EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 251)).isSignWrappedSet()); 302 } 303 304 TEST_F(ConstantRangeTest, UpperWrapped) { 305 // The behavior here is the same as for isWrappedSet() / isSignWrappedSet(). 306 EXPECT_FALSE(Full.isUpperWrapped()); 307 EXPECT_FALSE(Empty.isUpperWrapped()); 308 EXPECT_FALSE(One.isUpperWrapped()); 309 EXPECT_FALSE(Some.isUpperWrapped()); 310 EXPECT_TRUE(Wrap.isUpperWrapped()); 311 EXPECT_FALSE(Full.isUpperSignWrapped()); 312 EXPECT_FALSE(Empty.isUpperSignWrapped()); 313 EXPECT_FALSE(One.isUpperSignWrapped()); 314 EXPECT_FALSE(Some.isUpperSignWrapped()); 315 EXPECT_TRUE(Wrap.isUpperSignWrapped()); 316 317 // The behavior differs if Upper is the Min/SignedMin value. 318 ConstantRange CR1(APInt(8, 42), APInt::getMinValue(8)); 319 EXPECT_FALSE(CR1.isWrappedSet()); 320 EXPECT_TRUE(CR1.isUpperWrapped()); 321 322 ConstantRange CR2(APInt(8, 42), APInt::getSignedMinValue(8)); 323 EXPECT_FALSE(CR2.isSignWrappedSet()); 324 EXPECT_TRUE(CR2.isUpperSignWrapped()); 325 } 326 327 TEST_F(ConstantRangeTest, Trunc) { 328 ConstantRange TFull = Full.truncate(10); 329 ConstantRange TEmpty = Empty.truncate(10); 330 ConstantRange TOne = One.truncate(10); 331 ConstantRange TSome = Some.truncate(10); 332 ConstantRange TWrap = Wrap.truncate(10); 333 EXPECT_TRUE(TFull.isFullSet()); 334 EXPECT_TRUE(TEmpty.isEmptySet()); 335 EXPECT_EQ(TOne, ConstantRange(One.getLower().trunc(10), 336 One.getUpper().trunc(10))); 337 EXPECT_TRUE(TSome.isFullSet()); 338 EXPECT_TRUE(TWrap.isFullSet()); 339 340 // trunc([2, 5), 3->2) = [2, 1) 341 ConstantRange TwoFive(APInt(3, 2), APInt(3, 5)); 342 EXPECT_EQ(TwoFive.truncate(2), ConstantRange(APInt(2, 2), APInt(2, 1))); 343 344 // trunc([2, 6), 3->2) = full 345 ConstantRange TwoSix(APInt(3, 2), APInt(3, 6)); 346 EXPECT_TRUE(TwoSix.truncate(2).isFullSet()); 347 348 // trunc([5, 7), 3->2) = [1, 3) 349 ConstantRange FiveSeven(APInt(3, 5), APInt(3, 7)); 350 EXPECT_EQ(FiveSeven.truncate(2), ConstantRange(APInt(2, 1), APInt(2, 3))); 351 352 // trunc([7, 1), 3->2) = [3, 1) 353 ConstantRange SevenOne(APInt(3, 7), APInt(3, 1)); 354 EXPECT_EQ(SevenOne.truncate(2), ConstantRange(APInt(2, 3), APInt(2, 1))); 355 } 356 357 TEST_F(ConstantRangeTest, ZExt) { 358 ConstantRange ZFull = Full.zeroExtend(20); 359 ConstantRange ZEmpty = Empty.zeroExtend(20); 360 ConstantRange ZOne = One.zeroExtend(20); 361 ConstantRange ZSome = Some.zeroExtend(20); 362 ConstantRange ZWrap = Wrap.zeroExtend(20); 363 EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000))); 364 EXPECT_TRUE(ZEmpty.isEmptySet()); 365 EXPECT_EQ(ZOne, ConstantRange(One.getLower().zext(20), 366 One.getUpper().zext(20))); 367 EXPECT_EQ(ZSome, ConstantRange(Some.getLower().zext(20), 368 Some.getUpper().zext(20))); 369 EXPECT_EQ(ZWrap, ConstantRange(APInt(20, 0), APInt(20, 0x10000))); 370 371 // zext([5, 0), 3->7) = [5, 8) 372 ConstantRange FiveZero(APInt(3, 5), APInt(3, 0)); 373 EXPECT_EQ(FiveZero.zeroExtend(7), ConstantRange(APInt(7, 5), APInt(7, 8))); 374 } 375 376 TEST_F(ConstantRangeTest, SExt) { 377 ConstantRange SFull = Full.signExtend(20); 378 ConstantRange SEmpty = Empty.signExtend(20); 379 ConstantRange SOne = One.signExtend(20); 380 ConstantRange SSome = Some.signExtend(20); 381 ConstantRange SWrap = Wrap.signExtend(20); 382 EXPECT_EQ(SFull, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true), 383 APInt(20, INT16_MAX + 1, true))); 384 EXPECT_TRUE(SEmpty.isEmptySet()); 385 EXPECT_EQ(SOne, ConstantRange(One.getLower().sext(20), 386 One.getUpper().sext(20))); 387 EXPECT_EQ(SSome, ConstantRange(Some.getLower().sext(20), 388 Some.getUpper().sext(20))); 389 EXPECT_EQ(SWrap, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true), 390 APInt(20, INT16_MAX + 1, true))); 391 392 EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, 140)).signExtend(16), 393 ConstantRange(APInt(16, -128), APInt(16, 128))); 394 395 EXPECT_EQ(ConstantRange(APInt(16, 0x0200), APInt(16, 0x8000)).signExtend(19), 396 ConstantRange(APInt(19, 0x0200), APInt(19, 0x8000))); 397 } 398 399 TEST_F(ConstantRangeTest, IntersectWith) { 400 EXPECT_EQ(Empty.intersectWith(Full), Empty); 401 EXPECT_EQ(Empty.intersectWith(Empty), Empty); 402 EXPECT_EQ(Empty.intersectWith(One), Empty); 403 EXPECT_EQ(Empty.intersectWith(Some), Empty); 404 EXPECT_EQ(Empty.intersectWith(Wrap), Empty); 405 EXPECT_EQ(Full.intersectWith(Full), Full); 406 EXPECT_EQ(Some.intersectWith(Some), Some); 407 EXPECT_EQ(Some.intersectWith(One), One); 408 EXPECT_EQ(Full.intersectWith(One), One); 409 EXPECT_EQ(Full.intersectWith(Some), Some); 410 EXPECT_EQ(Some.intersectWith(Wrap), Empty); 411 EXPECT_EQ(One.intersectWith(Wrap), Empty); 412 EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One)); 413 414 // Klee generated testcase from PR4545. 415 // The intersection of i16 [4, 2) and [6, 5) is disjoint, looking like 416 // 01..4.6789ABCDEF where the dots represent values not in the intersection. 417 ConstantRange LHS(APInt(16, 4), APInt(16, 2)); 418 ConstantRange RHS(APInt(16, 6), APInt(16, 5)); 419 EXPECT_TRUE(LHS.intersectWith(RHS) == LHS); 420 421 // previous bug: intersection of [min, 3) and [2, max) should be 2 422 LHS = ConstantRange(APInt(32, -2147483646), APInt(32, 3)); 423 RHS = ConstantRange(APInt(32, 2), APInt(32, 2147483646)); 424 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2))); 425 426 // [2, 0) /\ [4, 3) = [2, 0) 427 LHS = ConstantRange(APInt(32, 2), APInt(32, 0)); 428 RHS = ConstantRange(APInt(32, 4), APInt(32, 3)); 429 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2), APInt(32, 0))); 430 431 // [2, 0) /\ [4, 2) = [4, 0) 432 LHS = ConstantRange(APInt(32, 2), APInt(32, 0)); 433 RHS = ConstantRange(APInt(32, 4), APInt(32, 2)); 434 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 0))); 435 436 // [4, 2) /\ [5, 1) = [5, 1) 437 LHS = ConstantRange(APInt(32, 4), APInt(32, 2)); 438 RHS = ConstantRange(APInt(32, 5), APInt(32, 1)); 439 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 5), APInt(32, 1))); 440 441 // [2, 0) /\ [7, 4) = [7, 4) 442 LHS = ConstantRange(APInt(32, 2), APInt(32, 0)); 443 RHS = ConstantRange(APInt(32, 7), APInt(32, 4)); 444 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 7), APInt(32, 4))); 445 446 // [4, 2) /\ [1, 0) = [1, 0) 447 LHS = ConstantRange(APInt(32, 4), APInt(32, 2)); 448 RHS = ConstantRange(APInt(32, 1), APInt(32, 0)); 449 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 2))); 450 451 // [15, 0) /\ [7, 6) = [15, 0) 452 LHS = ConstantRange(APInt(32, 15), APInt(32, 0)); 453 RHS = ConstantRange(APInt(32, 7), APInt(32, 6)); 454 EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 15), APInt(32, 0))); 455 } 456 457 template<typename Fn1, typename Fn2> 458 void testBinarySetOperationExhaustive(Fn1 OpFn, Fn2 InResultFn) { 459 unsigned Bits = 4; 460 EnumerateTwoConstantRanges(Bits, 461 [=](const ConstantRange &CR1, const ConstantRange &CR2) { 462 // Collect up to three contiguous unsigned ranges. The HaveInterrupt 463 // variables are used determine when we have to switch to the next 464 // range because the previous one ended. 465 APInt Lower1(Bits, 0), Upper1(Bits, 0); 466 APInt Lower2(Bits, 0), Upper2(Bits, 0); 467 APInt Lower3(Bits, 0), Upper3(Bits, 0); 468 bool HaveRange1 = false, HaveInterrupt1 = false; 469 bool HaveRange2 = false, HaveInterrupt2 = false; 470 bool HaveRange3 = false, HaveInterrupt3 = false; 471 472 APInt Num(Bits, 0); 473 for (unsigned I = 0, Limit = 1 << Bits; I < Limit; ++I, ++Num) { 474 if (!InResultFn(CR1, CR2, Num)) { 475 if (HaveRange3) 476 HaveInterrupt3 = true; 477 else if (HaveRange2) 478 HaveInterrupt2 = true; 479 else if (HaveRange1) 480 HaveInterrupt1 = true; 481 continue; 482 } 483 484 if (HaveRange3) { 485 Upper3 = Num; 486 } else if (HaveInterrupt2) { 487 HaveRange3 = true; 488 Lower3 = Upper3 = Num; 489 } else if (HaveRange2) { 490 Upper2 = Num; 491 } else if (HaveInterrupt1) { 492 HaveRange2 = true; 493 Lower2 = Upper2 = Num; 494 } else if (HaveRange1) { 495 Upper1 = Num; 496 } else { 497 HaveRange1 = true; 498 Lower1 = Upper1 = Num; 499 } 500 } 501 502 (void)HaveInterrupt3; 503 assert(!HaveInterrupt3 && "Should have at most three ranges"); 504 505 ConstantRange SmallestCR = OpFn(CR1, CR2, ConstantRange::Smallest); 506 ConstantRange UnsignedCR = OpFn(CR1, CR2, ConstantRange::Unsigned); 507 ConstantRange SignedCR = OpFn(CR1, CR2, ConstantRange::Signed); 508 509 if (!HaveRange1) { 510 EXPECT_TRUE(SmallestCR.isEmptySet()); 511 EXPECT_TRUE(UnsignedCR.isEmptySet()); 512 EXPECT_TRUE(SignedCR.isEmptySet()); 513 return; 514 } 515 516 if (!HaveRange2) { 517 if (Lower1 == Upper1 + 1) { 518 EXPECT_TRUE(SmallestCR.isFullSet()); 519 EXPECT_TRUE(UnsignedCR.isFullSet()); 520 EXPECT_TRUE(SignedCR.isFullSet()); 521 } else { 522 ConstantRange Expected(Lower1, Upper1 + 1); 523 EXPECT_EQ(Expected, SmallestCR); 524 EXPECT_EQ(Expected, UnsignedCR); 525 EXPECT_EQ(Expected, SignedCR); 526 } 527 return; 528 } 529 530 ConstantRange Variant1(Bits, /*full*/ true); 531 ConstantRange Variant2(Bits, /*full*/ true); 532 if (!HaveRange3) { 533 // Compute the two possible ways to cover two disjoint ranges. 534 if (Lower1 != Upper2 + 1) 535 Variant1 = ConstantRange(Lower1, Upper2 + 1); 536 if (Lower2 != Upper1 + 1) 537 Variant2 = ConstantRange(Lower2, Upper1 + 1); 538 } else { 539 // If we have three ranges, the first and last one have to be adjacent 540 // to the unsigned domain. It's better to think of this as having two 541 // holes, and we can construct one range using each hole. 542 assert(Lower1.isNullValue() && Upper3.isMaxValue()); 543 Variant1 = ConstantRange(Lower2, Upper1 + 1); 544 Variant2 = ConstantRange(Lower3, Upper2 + 1); 545 } 546 547 // Smallest: Smaller set, then any set. 548 if (Variant1.isSizeStrictlySmallerThan(Variant2)) 549 EXPECT_EQ(Variant1, SmallestCR); 550 else if (Variant2.isSizeStrictlySmallerThan(Variant1)) 551 EXPECT_EQ(Variant2, SmallestCR); 552 else 553 EXPECT_TRUE(Variant1 == SmallestCR || Variant2 == SmallestCR); 554 555 // Unsigned: Non-wrapped set, then smaller set, then any set. 556 bool Variant1Full = Variant1.isFullSet() || Variant1.isWrappedSet(); 557 bool Variant2Full = Variant2.isFullSet() || Variant2.isWrappedSet(); 558 if (!Variant1Full && Variant2Full) 559 EXPECT_EQ(Variant1, UnsignedCR); 560 else if (Variant1Full && !Variant2Full) 561 EXPECT_EQ(Variant2, UnsignedCR); 562 else if (Variant1.isSizeStrictlySmallerThan(Variant2)) 563 EXPECT_EQ(Variant1, UnsignedCR); 564 else if (Variant2.isSizeStrictlySmallerThan(Variant1)) 565 EXPECT_EQ(Variant2, UnsignedCR); 566 else 567 EXPECT_TRUE(Variant1 == UnsignedCR || Variant2 == UnsignedCR); 568 569 // Signed: Signed non-wrapped set, then smaller set, then any set. 570 Variant1Full = Variant1.isFullSet() || Variant1.isSignWrappedSet(); 571 Variant2Full = Variant2.isFullSet() || Variant2.isSignWrappedSet(); 572 if (!Variant1Full && Variant2Full) 573 EXPECT_EQ(Variant1, SignedCR); 574 else if (Variant1Full && !Variant2Full) 575 EXPECT_EQ(Variant2, SignedCR); 576 else if (Variant1.isSizeStrictlySmallerThan(Variant2)) 577 EXPECT_EQ(Variant1, SignedCR); 578 else if (Variant2.isSizeStrictlySmallerThan(Variant1)) 579 EXPECT_EQ(Variant2, SignedCR); 580 else 581 EXPECT_TRUE(Variant1 == SignedCR || Variant2 == SignedCR); 582 }); 583 } 584 585 TEST_F(ConstantRangeTest, IntersectWithExhaustive) { 586 testBinarySetOperationExhaustive( 587 [](const ConstantRange &CR1, const ConstantRange &CR2, 588 ConstantRange::PreferredRangeType Type) { 589 return CR1.intersectWith(CR2, Type); 590 }, 591 [](const ConstantRange &CR1, const ConstantRange &CR2, const APInt &N) { 592 return CR1.contains(N) && CR2.contains(N); 593 }); 594 } 595 596 TEST_F(ConstantRangeTest, UnionWithExhaustive) { 597 testBinarySetOperationExhaustive( 598 [](const ConstantRange &CR1, const ConstantRange &CR2, 599 ConstantRange::PreferredRangeType Type) { 600 return CR1.unionWith(CR2, Type); 601 }, 602 [](const ConstantRange &CR1, const ConstantRange &CR2, const APInt &N) { 603 return CR1.contains(N) || CR2.contains(N); 604 }); 605 } 606 607 TEST_F(ConstantRangeTest, UnionWith) { 608 EXPECT_EQ(Wrap.unionWith(One), 609 ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb))); 610 EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One)); 611 EXPECT_EQ(Empty.unionWith(Empty), Empty); 612 EXPECT_EQ(Full.unionWith(Full), Full); 613 EXPECT_EQ(Some.unionWith(Wrap), Full); 614 615 // PR4545 616 EXPECT_EQ(ConstantRange(APInt(16, 14), APInt(16, 1)).unionWith( 617 ConstantRange(APInt(16, 0), APInt(16, 8))), 618 ConstantRange(APInt(16, 14), APInt(16, 8))); 619 EXPECT_EQ(ConstantRange(APInt(16, 6), APInt(16, 4)).unionWith( 620 ConstantRange(APInt(16, 4), APInt(16, 0))), 621 ConstantRange::getFull(16)); 622 EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 0)).unionWith( 623 ConstantRange(APInt(16, 2), APInt(16, 1))), 624 ConstantRange::getFull(16)); 625 } 626 627 TEST_F(ConstantRangeTest, SetDifference) { 628 EXPECT_EQ(Full.difference(Empty), Full); 629 EXPECT_EQ(Full.difference(Full), Empty); 630 EXPECT_EQ(Empty.difference(Empty), Empty); 631 EXPECT_EQ(Empty.difference(Full), Empty); 632 633 ConstantRange A(APInt(16, 3), APInt(16, 7)); 634 ConstantRange B(APInt(16, 5), APInt(16, 9)); 635 ConstantRange C(APInt(16, 3), APInt(16, 5)); 636 ConstantRange D(APInt(16, 7), APInt(16, 9)); 637 ConstantRange E(APInt(16, 5), APInt(16, 4)); 638 ConstantRange F(APInt(16, 7), APInt(16, 3)); 639 EXPECT_EQ(A.difference(B), C); 640 EXPECT_EQ(B.difference(A), D); 641 EXPECT_EQ(E.difference(A), F); 642 } 643 644 TEST_F(ConstantRangeTest, SubtractAPInt) { 645 EXPECT_EQ(Full.subtract(APInt(16, 4)), Full); 646 EXPECT_EQ(Empty.subtract(APInt(16, 4)), Empty); 647 EXPECT_EQ(Some.subtract(APInt(16, 4)), 648 ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6))); 649 EXPECT_EQ(Wrap.subtract(APInt(16, 4)), 650 ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6))); 651 EXPECT_EQ(One.subtract(APInt(16, 4)), 652 ConstantRange(APInt(16, 0x6))); 653 } 654 655 TEST_F(ConstantRangeTest, Add) { 656 EXPECT_EQ(Full.add(APInt(16, 4)), Full); 657 EXPECT_EQ(Full.add(Full), Full); 658 EXPECT_EQ(Full.add(Empty), Empty); 659 EXPECT_EQ(Full.add(One), Full); 660 EXPECT_EQ(Full.add(Some), Full); 661 EXPECT_EQ(Full.add(Wrap), Full); 662 EXPECT_EQ(Empty.add(Empty), Empty); 663 EXPECT_EQ(Empty.add(One), Empty); 664 EXPECT_EQ(Empty.add(Some), Empty); 665 EXPECT_EQ(Empty.add(Wrap), Empty); 666 EXPECT_EQ(Empty.add(APInt(16, 4)), Empty); 667 EXPECT_EQ(Some.add(APInt(16, 4)), 668 ConstantRange(APInt(16, 0xe), APInt(16, 0xaae))); 669 EXPECT_EQ(Wrap.add(APInt(16, 4)), 670 ConstantRange(APInt(16, 0xaae), APInt(16, 0xe))); 671 EXPECT_EQ(One.add(APInt(16, 4)), 672 ConstantRange(APInt(16, 0xe))); 673 } 674 675 template <typename Fn1, typename Fn2> 676 static void TestAddWithNoSignedWrapExhaustive(Fn1 RangeFn, Fn2 IntFn) { 677 unsigned Bits = 4; 678 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1, 679 const ConstantRange &CR2) { 680 ConstantRange CR = RangeFn(CR1, CR2); 681 APInt Min = APInt::getSignedMaxValue(Bits); 682 APInt Max = APInt::getSignedMinValue(Bits); 683 bool AllOverflow = true; 684 ForeachNumInConstantRange(CR1, [&](const APInt &N1) { 685 ForeachNumInConstantRange(CR2, [&](const APInt &N2) { 686 bool IsOverflow = false; 687 APInt N = IntFn(IsOverflow, N1, N2); 688 if (!IsOverflow) { 689 AllOverflow = false; 690 if (N.slt(Min)) 691 Min = N; 692 if (N.sgt(Max)) 693 Max = N; 694 EXPECT_TRUE(CR.contains(N)); 695 } 696 }); 697 }); 698 699 EXPECT_EQ(CR.isEmptySet(), AllOverflow); 700 701 if (!CR1.isSignWrappedSet() && !CR2.isSignWrappedSet()) { 702 if (Min.sgt(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> 714 static void TestAddWithNoUnsignedWrapExhaustive(Fn1 RangeFn, Fn2 IntFn) { 715 unsigned Bits = 4; 716 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1, 717 const ConstantRange &CR2) { 718 ConstantRange CR = RangeFn(CR1, CR2); 719 APInt Min = APInt::getMaxValue(Bits); 720 APInt Max = APInt::getMinValue(Bits); 721 bool AllOverflow = true; 722 ForeachNumInConstantRange(CR1, [&](const APInt &N1) { 723 ForeachNumInConstantRange(CR2, [&](const APInt &N2) { 724 bool IsOverflow = false; 725 APInt N = IntFn(IsOverflow, N1, N2); 726 if (!IsOverflow) { 727 AllOverflow = false; 728 if (N.ult(Min)) 729 Min = N; 730 if (N.ugt(Max)) 731 Max = N; 732 EXPECT_TRUE(CR.contains(N)); 733 } 734 }); 735 }); 736 737 EXPECT_EQ(CR.isEmptySet(), AllOverflow); 738 739 if (!CR1.isWrappedSet() && !CR2.isWrappedSet()) { 740 if (Min.ugt(Max)) { 741 EXPECT_TRUE(CR.isEmptySet()); 742 return; 743 } 744 745 ConstantRange Exact = ConstantRange::getNonEmpty(Min, Max + 1); 746 EXPECT_EQ(Exact, CR); 747 } 748 }); 749 } 750 751 template <typename Fn1, typename Fn2, typename Fn3> 752 static void TestAddWithNoSignedUnsignedWrapExhaustive(Fn1 RangeFn, 753 Fn2 IntFnSigned, 754 Fn3 IntFnUnsigned) { 755 unsigned Bits = 4; 756 EnumerateTwoConstantRanges( 757 Bits, [&](const ConstantRange &CR1, const ConstantRange &CR2) { 758 ConstantRange CR = RangeFn(CR1, CR2); 759 APInt UMin = APInt::getMaxValue(Bits); 760 APInt UMax = APInt::getMinValue(Bits); 761 APInt SMin = APInt::getSignedMaxValue(Bits); 762 APInt SMax = APInt::getSignedMinValue(Bits); 763 bool AllOverflow = true; 764 ForeachNumInConstantRange(CR1, [&](const APInt &N1) { 765 ForeachNumInConstantRange(CR2, [&](const APInt &N2) { 766 bool IsOverflow = false, IsSignedOverflow = false; 767 APInt N = IntFnSigned(IsSignedOverflow, N1, N2); 768 (void) IntFnUnsigned(IsOverflow, N1, N2); 769 if (!IsSignedOverflow && !IsOverflow) { 770 AllOverflow = false; 771 if (N.slt(SMin)) 772 SMin = N; 773 if (N.sgt(SMax)) 774 SMax = N; 775 if (N.ult(UMin)) 776 UMin = N; 777 if (N.ugt(UMax)) 778 UMax = N; 779 EXPECT_TRUE(CR.contains(N)); 780 } 781 }); 782 }); 783 784 EXPECT_EQ(CR.isEmptySet(), AllOverflow); 785 786 if (!CR1.isWrappedSet() && !CR2.isWrappedSet() && 787 !CR1.isSignWrappedSet() && !CR2.isSignWrappedSet()) { 788 if (UMin.ugt(UMax) || SMin.sgt(SMax)) { 789 EXPECT_TRUE(CR.isEmptySet()); 790 return; 791 } 792 793 ConstantRange Exact = 794 ConstantRange::getNonEmpty(SMin, SMax + 1) 795 .intersectWith(ConstantRange::getNonEmpty(UMin, UMax + 1)); 796 EXPECT_EQ(Exact, CR); 797 } 798 }); 799 } 800 801 TEST_F(ConstantRangeTest, AddWithNoWrap) { 802 typedef OverflowingBinaryOperator OBO; 803 EXPECT_EQ(Empty.addWithNoWrap(Some, OBO::NoSignedWrap), Empty); 804 EXPECT_EQ(Some.addWithNoWrap(Empty, OBO::NoSignedWrap), Empty); 805 EXPECT_EQ(Full.addWithNoWrap(Full, OBO::NoSignedWrap), Full); 806 EXPECT_NE(Full.addWithNoWrap(Some, OBO::NoSignedWrap), Full); 807 EXPECT_NE(Some.addWithNoWrap(Full, OBO::NoSignedWrap), Full); 808 EXPECT_EQ(Full.addWithNoWrap(ConstantRange(APInt(16, 1), APInt(16, 2)), 809 OBO::NoSignedWrap), 810 ConstantRange(APInt(16, INT16_MIN + 1), APInt(16, INT16_MIN))); 811 EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 2)) 812 .addWithNoWrap(Full, OBO::NoSignedWrap), 813 ConstantRange(APInt(16, INT16_MIN + 1), APInt(16, INT16_MIN))); 814 EXPECT_EQ(Full.addWithNoWrap(ConstantRange(APInt(16, -1), APInt(16, 0)), 815 OBO::NoSignedWrap), 816 ConstantRange(APInt(16, INT16_MIN), APInt(16, INT16_MAX))); 817 EXPECT_EQ(ConstantRange(APInt(8, 100), APInt(8, 120)) 818 .addWithNoWrap(ConstantRange(APInt(8, 120), APInt(8, 123)), 819 OBO::NoSignedWrap), 820 ConstantRange(8, false)); 821 EXPECT_EQ(ConstantRange(APInt(8, -120), APInt(8, -100)) 822 .addWithNoWrap(ConstantRange(APInt(8, -110), APInt(8, -100)), 823 OBO::NoSignedWrap), 824 ConstantRange(8, false)); 825 EXPECT_EQ(ConstantRange(APInt(8, 0), APInt(8, 101)) 826 .addWithNoWrap(ConstantRange(APInt(8, -128), APInt(8, 28)), 827 OBO::NoSignedWrap), 828 ConstantRange(8, true)); 829 EXPECT_EQ(ConstantRange(APInt(8, 0), APInt(8, 101)) 830 .addWithNoWrap(ConstantRange(APInt(8, -120), APInt(8, 29)), 831 OBO::NoSignedWrap), 832 ConstantRange(APInt(8, -120), APInt(8, -128))); 833 EXPECT_EQ(ConstantRange(APInt(8, -50), APInt(8, 50)) 834 .addWithNoWrap(ConstantRange(APInt(8, 10), APInt(8, 20)), 835 OBO::NoSignedWrap), 836 ConstantRange(APInt(8, -40), APInt(8, 69))); 837 EXPECT_EQ(ConstantRange(APInt(8, 10), APInt(8, 20)) 838 .addWithNoWrap(ConstantRange(APInt(8, -50), APInt(8, 50)), 839 OBO::NoSignedWrap), 840 ConstantRange(APInt(8, -40), APInt(8, 69))); 841 EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, -10)) 842 .addWithNoWrap(ConstantRange(APInt(8, 5), APInt(8, 20)), 843 OBO::NoSignedWrap), 844 ConstantRange(APInt(8, 125), APInt(8, 9))); 845 EXPECT_EQ(ConstantRange(APInt(8, 5), APInt(8, 20)) 846 .addWithNoWrap(ConstantRange(APInt(8, 120), APInt(8, -10)), 847 OBO::NoSignedWrap), 848 ConstantRange(APInt(8, 125), APInt(8, 9))); 849 850 TestAddWithNoSignedWrapExhaustive( 851 [](const ConstantRange &CR1, const ConstantRange &CR2) { 852 return CR1.addWithNoWrap(CR2, OBO::NoSignedWrap); 853 }, 854 [](bool &IsOverflow, const APInt &N1, const APInt &N2) { 855 return N1.sadd_ov(N2, IsOverflow); 856 }); 857 858 EXPECT_EQ(Empty.addWithNoWrap(Some, OBO::NoUnsignedWrap), Empty); 859 EXPECT_EQ(Some.addWithNoWrap(Empty, OBO::NoUnsignedWrap), Empty); 860 EXPECT_EQ(Full.addWithNoWrap(Full, OBO::NoUnsignedWrap), Full); 861 EXPECT_NE(Full.addWithNoWrap(Some, OBO::NoUnsignedWrap), Full); 862 EXPECT_NE(Some.addWithNoWrap(Full, OBO::NoUnsignedWrap), Full); 863 EXPECT_EQ(Full.addWithNoWrap(ConstantRange(APInt(16, 1), APInt(16, 2)), 864 OBO::NoUnsignedWrap), 865 ConstantRange(APInt(16, 1), APInt(16, 0))); 866 EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 2)) 867 .addWithNoWrap(Full, OBO::NoUnsignedWrap), 868 ConstantRange(APInt(16, 1), APInt(16, 0))); 869 EXPECT_EQ(ConstantRange(APInt(8, 200), APInt(8, 220)) 870 .addWithNoWrap(ConstantRange(APInt(8, 100), APInt(8, 123)), 871 OBO::NoUnsignedWrap), 872 ConstantRange(8, false)); 873 EXPECT_EQ(ConstantRange(APInt(8, 0), APInt(8, 101)) 874 .addWithNoWrap(ConstantRange(APInt(8, 0), APInt(8, 156)), 875 OBO::NoUnsignedWrap), 876 ConstantRange(8, true)); 877 EXPECT_EQ(ConstantRange(APInt(8, 0), APInt(8, 101)) 878 .addWithNoWrap(ConstantRange(APInt(8, 10), APInt(8, 29)), 879 OBO::NoUnsignedWrap), 880 ConstantRange(APInt(8, 10), APInt(8, 129))); 881 EXPECT_EQ(ConstantRange(APInt(8, 20), APInt(8, 10)) 882 .addWithNoWrap(ConstantRange(APInt(8, 50), APInt(8, 200)), 883 OBO::NoUnsignedWrap), 884 ConstantRange(APInt(8, 50), APInt(8, 0))); 885 EXPECT_EQ(ConstantRange(APInt(8, 10), APInt(8, 20)) 886 .addWithNoWrap(ConstantRange(APInt(8, 50), APInt(8, 200)), 887 OBO::NoUnsignedWrap), 888 ConstantRange(APInt(8, 60), APInt(8, -37))); 889 EXPECT_EQ(ConstantRange(APInt(8, 20), APInt(8, -30)) 890 .addWithNoWrap(ConstantRange(APInt(8, 5), APInt(8, 20)), 891 OBO::NoUnsignedWrap), 892 ConstantRange(APInt(8, 25), APInt(8, -11))); 893 EXPECT_EQ(ConstantRange(APInt(8, 5), APInt(8, 20)) 894 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, -30)), 895 OBO::NoUnsignedWrap), 896 ConstantRange(APInt(8, 25), APInt(8, -11))); 897 898 TestAddWithNoUnsignedWrapExhaustive( 899 [](const ConstantRange &CR1, const ConstantRange &CR2) { 900 return CR1.addWithNoWrap(CR2, OBO::NoUnsignedWrap); 901 }, 902 [](bool &IsOverflow, const APInt &N1, const APInt &N2) { 903 return N1.uadd_ov(N2, IsOverflow); 904 }); 905 906 EXPECT_EQ(ConstantRange(APInt(8, 50), APInt(8, 100)) 907 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 70)), 908 OBO::NoSignedWrap), 909 ConstantRange(APInt(8, 70), APInt(8, -128))); 910 EXPECT_EQ(ConstantRange(APInt(8, 50), APInt(8, 100)) 911 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 70)), 912 OBO::NoUnsignedWrap), 913 ConstantRange(APInt(8, 70), APInt(8, 169))); 914 EXPECT_EQ(ConstantRange(APInt(8, 50), APInt(8, 100)) 915 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 70)), 916 OBO::NoUnsignedWrap | OBO::NoSignedWrap), 917 ConstantRange(APInt(8, 70), APInt(8, -128))); 918 919 EXPECT_EQ(ConstantRange(APInt(8, -100), APInt(8, -50)) 920 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 30)), 921 OBO::NoSignedWrap), 922 ConstantRange(APInt(8, -80), APInt(8, -21))); 923 EXPECT_EQ(ConstantRange(APInt(8, -100), APInt(8, -50)) 924 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 30)), 925 OBO::NoUnsignedWrap), 926 ConstantRange(APInt(8, 176), APInt(8, 235))); 927 EXPECT_EQ(ConstantRange(APInt(8, -100), APInt(8, -50)) 928 .addWithNoWrap(ConstantRange(APInt(8, 20), APInt(8, 30)), 929 OBO::NoUnsignedWrap | OBO::NoSignedWrap), 930 ConstantRange(APInt(8, 176), APInt(8, 235))); 931 932 TestAddWithNoSignedUnsignedWrapExhaustive( 933 [](const ConstantRange &CR1, const ConstantRange &CR2) { 934 return CR1.addWithNoWrap(CR2, OBO::NoUnsignedWrap | OBO::NoSignedWrap); 935 }, 936 [](bool &IsOverflow, const APInt &N1, const APInt &N2) { 937 return N1.sadd_ov(N2, IsOverflow); 938 }, 939 [](bool &IsOverflow, const APInt &N1, const APInt &N2) { 940 return N1.uadd_ov(N2, IsOverflow); 941 }); 942 } 943 944 TEST_F(ConstantRangeTest, Sub) { 945 EXPECT_EQ(Full.sub(APInt(16, 4)), Full); 946 EXPECT_EQ(Full.sub(Full), Full); 947 EXPECT_EQ(Full.sub(Empty), Empty); 948 EXPECT_EQ(Full.sub(One), Full); 949 EXPECT_EQ(Full.sub(Some), Full); 950 EXPECT_EQ(Full.sub(Wrap), Full); 951 EXPECT_EQ(Empty.sub(Empty), Empty); 952 EXPECT_EQ(Empty.sub(One), Empty); 953 EXPECT_EQ(Empty.sub(Some), Empty); 954 EXPECT_EQ(Empty.sub(Wrap), Empty); 955 EXPECT_EQ(Empty.sub(APInt(16, 4)), Empty); 956 EXPECT_EQ(Some.sub(APInt(16, 4)), 957 ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6))); 958 EXPECT_EQ(Some.sub(Some), 959 ConstantRange(APInt(16, 0xf561), APInt(16, 0xaa0))); 960 EXPECT_EQ(Wrap.sub(APInt(16, 4)), 961 ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6))); 962 EXPECT_EQ(One.sub(APInt(16, 4)), 963 ConstantRange(APInt(16, 0x6))); 964 } 965 966 TEST_F(ConstantRangeTest, SubWithNoWrap) { 967 typedef OverflowingBinaryOperator OBO; 968 TestAddWithNoSignedWrapExhaustive( 969 [](const ConstantRange &CR1, const ConstantRange &CR2) { 970 return CR1.subWithNoWrap(CR2, OBO::NoSignedWrap); 971 }, 972 [](bool &IsOverflow, const APInt &N1, const APInt &N2) { 973 return N1.ssub_ov(N2, IsOverflow); 974 }); 975 TestAddWithNoUnsignedWrapExhaustive( 976 [](const ConstantRange &CR1, const ConstantRange &CR2) { 977 return CR1.subWithNoWrap(CR2, OBO::NoUnsignedWrap); 978 }, 979 [](bool &IsOverflow, const APInt &N1, const APInt &N2) { 980 return N1.usub_ov(N2, IsOverflow); 981 }); 982 TestAddWithNoSignedUnsignedWrapExhaustive( 983 [](const ConstantRange &CR1, const ConstantRange &CR2) { 984 return CR1.subWithNoWrap(CR2, OBO::NoUnsignedWrap | OBO::NoSignedWrap); 985 }, 986 [](bool &IsOverflow, const APInt &N1, const APInt &N2) { 987 return N1.ssub_ov(N2, IsOverflow); 988 }, 989 [](bool &IsOverflow, const APInt &N1, const APInt &N2) { 990 return N1.usub_ov(N2, IsOverflow); 991 }); 992 } 993 994 TEST_F(ConstantRangeTest, Multiply) { 995 EXPECT_EQ(Full.multiply(Full), Full); 996 EXPECT_EQ(Full.multiply(Empty), Empty); 997 EXPECT_EQ(Full.multiply(One), Full); 998 EXPECT_EQ(Full.multiply(Some), Full); 999 EXPECT_EQ(Full.multiply(Wrap), Full); 1000 EXPECT_EQ(Empty.multiply(Empty), Empty); 1001 EXPECT_EQ(Empty.multiply(One), Empty); 1002 EXPECT_EQ(Empty.multiply(Some), Empty); 1003 EXPECT_EQ(Empty.multiply(Wrap), Empty); 1004 EXPECT_EQ(One.multiply(One), ConstantRange(APInt(16, 0xa*0xa), 1005 APInt(16, 0xa*0xa + 1))); 1006 EXPECT_EQ(One.multiply(Some), ConstantRange(APInt(16, 0xa*0xa), 1007 APInt(16, 0xa*0xaa9 + 1))); 1008 EXPECT_EQ(One.multiply(Wrap), Full); 1009 EXPECT_EQ(Some.multiply(Some), Full); 1010 EXPECT_EQ(Some.multiply(Wrap), Full); 1011 EXPECT_EQ(Wrap.multiply(Wrap), Full); 1012 1013 ConstantRange Zero(APInt(16, 0)); 1014 EXPECT_EQ(Zero.multiply(Full), Zero); 1015 EXPECT_EQ(Zero.multiply(Some), Zero); 1016 EXPECT_EQ(Zero.multiply(Wrap), Zero); 1017 EXPECT_EQ(Full.multiply(Zero), Zero); 1018 EXPECT_EQ(Some.multiply(Zero), Zero); 1019 EXPECT_EQ(Wrap.multiply(Zero), Zero); 1020 1021 // http://llvm.org/PR4545 1022 EXPECT_EQ(ConstantRange(APInt(4, 1), APInt(4, 6)).multiply( 1023 ConstantRange(APInt(4, 6), APInt(4, 2))), 1024 ConstantRange(4, /*isFullSet=*/true)); 1025 1026 EXPECT_EQ(ConstantRange(APInt(8, 254), APInt(8, 0)).multiply( 1027 ConstantRange(APInt(8, 252), APInt(8, 4))), 1028 ConstantRange(APInt(8, 250), APInt(8, 9))); 1029 EXPECT_EQ(ConstantRange(APInt(8, 254), APInt(8, 255)).multiply( 1030 ConstantRange(APInt(8, 2), APInt(8, 4))), 1031 ConstantRange(APInt(8, 250), APInt(8, 253))); 1032 1033 // TODO: This should be return [-2, 0] 1034 EXPECT_EQ(ConstantRange(APInt(8, -2)).multiply( 1035 ConstantRange(APInt(8, 0), APInt(8, 2))), 1036 ConstantRange(APInt(8, -2), APInt(8, 1))); 1037 } 1038 1039 TEST_F(ConstantRangeTest, UMax) { 1040 EXPECT_EQ(Full.umax(Full), Full); 1041 EXPECT_EQ(Full.umax(Empty), Empty); 1042 EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0))); 1043 EXPECT_EQ(Full.umax(Wrap), Full); 1044 EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0))); 1045 EXPECT_EQ(Empty.umax(Empty), Empty); 1046 EXPECT_EQ(Empty.umax(Some), Empty); 1047 EXPECT_EQ(Empty.umax(Wrap), Empty); 1048 EXPECT_EQ(Empty.umax(One), Empty); 1049 EXPECT_EQ(Some.umax(Some), Some); 1050 EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0))); 1051 EXPECT_EQ(Some.umax(One), Some); 1052 // TODO: ConstantRange is currently over-conservative here. 1053 EXPECT_EQ(Wrap.umax(Wrap), Full); 1054 EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0))); 1055 EXPECT_EQ(One.umax(One), One); 1056 } 1057 1058 TEST_F(ConstantRangeTest, SMax) { 1059 EXPECT_EQ(Full.smax(Full), Full); 1060 EXPECT_EQ(Full.smax(Empty), Empty); 1061 EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa), 1062 APInt::getSignedMinValue(16))); 1063 EXPECT_EQ(Full.smax(Wrap), Full); 1064 EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa), 1065 APInt::getSignedMinValue(16))); 1066 EXPECT_EQ(Empty.smax(Empty), Empty); 1067 EXPECT_EQ(Empty.smax(Some), Empty); 1068 EXPECT_EQ(Empty.smax(Wrap), Empty); 1069 EXPECT_EQ(Empty.smax(One), Empty); 1070 EXPECT_EQ(Some.smax(Some), Some); 1071 EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa), 1072 APInt(16, (uint64_t)INT16_MIN))); 1073 EXPECT_EQ(Some.smax(One), Some); 1074 EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa), 1075 APInt(16, (uint64_t)INT16_MIN))); 1076 EXPECT_EQ(One.smax(One), One); 1077 } 1078 1079 TEST_F(ConstantRangeTest, UMin) { 1080 EXPECT_EQ(Full.umin(Full), Full); 1081 EXPECT_EQ(Full.umin(Empty), Empty); 1082 EXPECT_EQ(Full.umin(Some), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); 1083 EXPECT_EQ(Full.umin(Wrap), Full); 1084 EXPECT_EQ(Empty.umin(Empty), Empty); 1085 EXPECT_EQ(Empty.umin(Some), Empty); 1086 EXPECT_EQ(Empty.umin(Wrap), Empty); 1087 EXPECT_EQ(Empty.umin(One), Empty); 1088 EXPECT_EQ(Some.umin(Some), Some); 1089 EXPECT_EQ(Some.umin(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); 1090 EXPECT_EQ(Some.umin(One), One); 1091 // TODO: ConstantRange is currently over-conservative here. 1092 EXPECT_EQ(Wrap.umin(Wrap), Full); 1093 EXPECT_EQ(Wrap.umin(One), ConstantRange(APInt(16, 0), APInt(16, 0xb))); 1094 EXPECT_EQ(One.umin(One), One); 1095 } 1096 1097 TEST_F(ConstantRangeTest, SMin) { 1098 EXPECT_EQ(Full.smin(Full), Full); 1099 EXPECT_EQ(Full.smin(Empty), Empty); 1100 EXPECT_EQ(Full.smin(Some), ConstantRange(APInt(16, (uint64_t)INT16_MIN), 1101 APInt(16, 0xaaa))); 1102 EXPECT_EQ(Full.smin(Wrap), Full); 1103 EXPECT_EQ(Empty.smin(Empty), Empty); 1104 EXPECT_EQ(Empty.smin(Some), Empty); 1105 EXPECT_EQ(Empty.smin(Wrap), Empty); 1106 EXPECT_EQ(Empty.smin(One), Empty); 1107 EXPECT_EQ(Some.smin(Some), Some); 1108 EXPECT_EQ(Some.smin(Wrap), ConstantRange(APInt(16, (uint64_t)INT16_MIN), 1109 APInt(16, 0xaaa))); 1110 EXPECT_EQ(Some.smin(One), One); 1111 // TODO: ConstantRange is currently over-conservative here. 1112 EXPECT_EQ(Wrap.smin(Wrap), Full); 1113 EXPECT_EQ(Wrap.smin(One), ConstantRange(APInt(16, (uint64_t)INT16_MIN), 1114 APInt(16, 0xb))); 1115 EXPECT_EQ(One.smin(One), One); 1116 } 1117 1118 TEST_F(ConstantRangeTest, UDiv) { 1119 EXPECT_EQ(Full.udiv(Full), Full); 1120 EXPECT_EQ(Full.udiv(Empty), Empty); 1121 EXPECT_EQ(Full.udiv(One), ConstantRange(APInt(16, 0), 1122 APInt(16, 0xffff / 0xa + 1))); 1123 EXPECT_EQ(Full.udiv(Some), ConstantRange(APInt(16, 0), 1124 APInt(16, 0xffff / 0xa + 1))); 1125 EXPECT_EQ(Full.udiv(Wrap), Full); 1126 EXPECT_EQ(Empty.udiv(Empty), Empty); 1127 EXPECT_EQ(Empty.udiv(One), Empty); 1128 EXPECT_EQ(Empty.udiv(Some), Empty); 1129 EXPECT_EQ(Empty.udiv(Wrap), Empty); 1130 EXPECT_EQ(One.udiv(One), ConstantRange(APInt(16, 1))); 1131 EXPECT_EQ(One.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 2))); 1132 EXPECT_EQ(One.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb))); 1133 EXPECT_EQ(Some.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 0x111))); 1134 EXPECT_EQ(Some.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); 1135 EXPECT_EQ(Wrap.udiv(Wrap), Full); 1136 1137 1138 ConstantRange Zero(APInt(16, 0)); 1139 EXPECT_EQ(Zero.udiv(One), Zero); 1140 EXPECT_EQ(Zero.udiv(Full), Zero); 1141 1142 EXPECT_EQ(ConstantRange(APInt(16, 0), APInt(16, 99)).udiv(Full), 1143 ConstantRange(APInt(16, 0), APInt(16, 99))); 1144 EXPECT_EQ(ConstantRange(APInt(16, 10), APInt(16, 99)).udiv(Full), 1145 ConstantRange(APInt(16, 0), APInt(16, 99))); 1146 } 1147 1148 TEST_F(ConstantRangeTest, SDiv) { 1149 unsigned Bits = 4; 1150 EnumerateTwoConstantRanges(Bits, [&](const ConstantRange &CR1, 1151 const ConstantRange &CR2) { 1152 // Collect possible results in a bit vector. We store the signed value plus 1153 // a bias to make it unsigned. 1154 int Bias = 1 << (Bits - 1); 1155 BitVector Results(1 << Bits); 1156 ForeachNumInConstantRange(CR1, [&](const APInt &N1) { 1157 ForeachNumInConstantRange(CR2, [&](const APInt &N2) { 1158 // Division by zero is UB. 1159 if (N2 == 0) 1160 return; 1161 1162 // SignedMin / -1 is UB. 1163 if (N1.isMinSignedValue() && N2.isAllOnesValue()) 1164 return; 1165 1166 APInt N = N1.sdiv(N2); 1167 Results.set(N.getSExtValue() + Bias); 1168 }); 1169 }); 1170 1171 ConstantRange CR = CR1.sdiv(CR2); 1172 if (Results.none()) { 1173 EXPECT_TRUE(CR.isEmptySet()); 1174 return; 1175 } 1176 1177 // If there is a non-full signed envelope, that should be the result. 1178 APInt SMin(Bits, Results.find_first() - Bias); 1179 APInt SMax(Bits, Results.find_last() - Bias); 1180 ConstantRange Envelope = ConstantRange::getNonEmpty(SMin, SMax + 1); 1181 if (!Envelope.isFullSet()) { 1182 EXPECT_EQ(Envelope, CR); 1183 return; 1184 } 1185 1186 // If the signed envelope is a full set, try to find a smaller sign wrapped 1187 // set that is separated in negative and positive components (or one which 1188 // can also additionally contain zero). 1189 int LastNeg = Results.find_last_in(0, Bias) - Bias; 1190 int LastPos = Results.find_next(Bias) - Bias; 1191 if (Results[Bias]) { 1192 if (LastNeg == -1) 1193 ++LastNeg; 1194 else if (LastPos == 1) 1195 --LastPos; 1196 } 1197 1198 APInt WMax(Bits, LastNeg); 1199 APInt WMin(Bits, LastPos); 1200 ConstantRange Wrapped = ConstantRange::getNonEmpty(WMin, WMax + 1); 1201 EXPECT_EQ(Wrapped, CR); 1202 }); 1203 } 1204 1205 TEST_F(ConstantRangeTest, URem) { 1206 EXPECT_EQ(Full.urem(Empty), Empty); 1207 EXPECT_EQ(Empty.urem(Full), Empty); 1208 // urem by zero is poison. 1209 EXPECT_EQ(Full.urem(ConstantRange(APInt(16, 0))), Empty); 1210 // urem by full range doesn't contain MaxValue. 1211 EXPECT_EQ(Full.urem(Full), ConstantRange(APInt(16, 0), APInt(16, 0xffff))); 1212 // urem is upper bounded by maximum RHS minus one. 1213 EXPECT_EQ(Full.urem(ConstantRange(APInt(16, 0), APInt(16, 123))), 1214 ConstantRange(APInt(16, 0), APInt(16, 122))); 1215 // urem is upper bounded by maximum LHS. 1216 EXPECT_EQ(ConstantRange(APInt(16, 0), APInt(16, 123)).urem(Full), 1217 ConstantRange(APInt(16, 0), APInt(16, 123))); 1218 // If the LHS is always lower than the RHS, the result is the LHS. 1219 EXPECT_EQ(ConstantRange(APInt(16, 10), APInt(16, 20)) 1220 .urem(ConstantRange(APInt(16, 20), APInt(16, 30))), 1221 ConstantRange(APInt(16, 10), APInt(16, 20))); 1222 // It has to be strictly lower, otherwise the top value may wrap to zero. 1223 EXPECT_EQ(ConstantRange(APInt(16, 10), APInt(16, 20)) 1224 .urem(ConstantRange(APInt(16, 19), APInt(16, 30))), 1225 ConstantRange(APInt(16, 0), APInt(16, 20))); 1226 // [12, 14] % 10 is [2, 4], but we conservatively compute [0, 9]. 1227 EXPECT_EQ(ConstantRange(APInt(16, 12), APInt(16, 15)) 1228 .urem(ConstantRange(APInt(16, 10))), 1229 ConstantRange(APInt(16, 0), APInt(16, 10))); 1230 1231 TestUnsignedBinOpExhaustive( 1232 [](const ConstantRange &CR1, const ConstantRange &CR2) { 1233 return CR1.urem(CR2); 1234 }, 1235 [](const APInt &N1, const APInt &N2) { 1236 return N1.urem(N2); 1237 }, 1238 /* SkipZeroRHS */ true, /* CorrectnessOnly */ true); 1239 } 1240 1241 TEST_F(ConstantRangeTest, SRem) { 1242 EXPECT_EQ(Full.srem(Empty), Empty); 1243 EXPECT_EQ(Empty.srem(Full), Empty); 1244 // srem by zero is UB. 1245 EXPECT_EQ(Full.srem(ConstantRange(APInt(16, 0))), Empty); 1246 // srem by full range doesn't contain SignedMinValue. 1247 EXPECT_EQ(Full.srem(Full), ConstantRange(APInt::getSignedMinValue(16) + 1, 1248 APInt::getSignedMinValue(16))); 1249 1250 ConstantRange PosMod(APInt(16, 10), APInt(16, 21)); // [10, 20] 1251 ConstantRange NegMod(APInt(16, -20), APInt(16, -9)); // [-20, -10] 1252 ConstantRange IntMinMod(APInt::getSignedMinValue(16)); 1253 1254 ConstantRange Expected(16, true); 1255 1256 // srem is bounded by abs(RHS) minus one. 1257 ConstantRange PosLargeLHS(APInt(16, 0), APInt(16, 41)); 1258 Expected = ConstantRange(APInt(16, 0), APInt(16, 20)); 1259 EXPECT_EQ(PosLargeLHS.srem(PosMod), Expected); 1260 EXPECT_EQ(PosLargeLHS.srem(NegMod), Expected); 1261 ConstantRange NegLargeLHS(APInt(16, -40), APInt(16, 1)); 1262 Expected = ConstantRange(APInt(16, -19), APInt(16, 1)); 1263 EXPECT_EQ(NegLargeLHS.srem(PosMod), Expected); 1264 EXPECT_EQ(NegLargeLHS.srem(NegMod), Expected); 1265 ConstantRange PosNegLargeLHS(APInt(16, -32), APInt(16, 38)); 1266 Expected = ConstantRange(APInt(16, -19), APInt(16, 20)); 1267 EXPECT_EQ(PosNegLargeLHS.srem(PosMod), Expected); 1268 EXPECT_EQ(PosNegLargeLHS.srem(NegMod), Expected); 1269 1270 // srem is bounded by LHS. 1271 ConstantRange PosLHS(APInt(16, 0), APInt(16, 16)); 1272 EXPECT_EQ(PosLHS.srem(PosMod), PosLHS); 1273 EXPECT_EQ(PosLHS.srem(NegMod), PosLHS); 1274 EXPECT_EQ(PosLHS.srem(IntMinMod), PosLHS); 1275 ConstantRange NegLHS(APInt(16, -15), APInt(16, 1)); 1276 EXPECT_EQ(NegLHS.srem(PosMod), NegLHS); 1277 EXPECT_EQ(NegLHS.srem(NegMod), NegLHS); 1278 EXPECT_EQ(NegLHS.srem(IntMinMod), NegLHS); 1279 ConstantRange PosNegLHS(APInt(16, -12), APInt(16, 18)); 1280 EXPECT_EQ(PosNegLHS.srem(PosMod), PosNegLHS); 1281 EXPECT_EQ(PosNegLHS.srem(NegMod), PosNegLHS); 1282 EXPECT_EQ(PosNegLHS.srem(IntMinMod), PosNegLHS); 1283 1284 // srem is LHS if it is smaller than RHS. 1285 ConstantRange PosSmallLHS(APInt(16, 3), APInt(16, 8)); 1286 EXPECT_EQ(PosSmallLHS.srem(PosMod), PosSmallLHS); 1287 EXPECT_EQ(PosSmallLHS.srem(NegMod), PosSmallLHS); 1288 EXPECT_EQ(PosSmallLHS.srem(IntMinMod), PosSmallLHS); 1289 ConstantRange NegSmallLHS(APInt(16, -7), APInt(16, -2)); 1290 EXPECT_EQ(NegSmallLHS.srem(PosMod), NegSmallLHS); 1291 EXPECT_EQ(NegSmallLHS.srem(NegMod), NegSmallLHS); 1292 EXPECT_EQ(NegSmallLHS.srem(IntMinMod), NegSmallLHS); 1293 ConstantRange PosNegSmallLHS(APInt(16, -3), APInt(16, 8)); 1294 EXPECT_EQ(PosNegSmallLHS.srem(PosMod), PosNegSmallLHS); 1295 EXPECT_EQ(PosNegSmallLHS.srem(NegMod), PosNegSmallLHS); 1296 EXPECT_EQ(PosNegSmallLHS.srem(IntMinMod), PosNegSmallLHS); 1297 1298 // Example of a suboptimal result: 1299 // [12, 14] srem 10 is [2, 4], but we conservatively compute [0, 9]. 1300 EXPECT_EQ(ConstantRange(APInt(16, 12), APInt(16, 15)) 1301 .srem(ConstantRange(APInt(16, 10))), 1302 ConstantRange(APInt(16, 0), APInt(16, 10))); 1303 1304 TestSignedBinOpExhaustive( 1305 [](const ConstantRange &CR1, const ConstantRange &CR2) { 1306 return CR1.srem(CR2); 1307 }, 1308 [](const APInt &N1, const APInt &N2) { 1309 return N1.srem(N2); 1310 }, 1311 /* SkipZeroRHS */ true, /* CorrectnessOnly */ true); 1312 } 1313 1314 TEST_F(ConstantRangeTest, Shl) { 1315 ConstantRange Some2(APInt(16, 0xfff), APInt(16, 0x8000)); 1316 ConstantRange WrapNullMax(APInt(16, 0x1), APInt(16, 0x0)); 1317 EXPECT_EQ(Full.shl(Full), Full); 1318 EXPECT_EQ(Full.shl(Empty), Empty); 1319 EXPECT_EQ(Full.shl(One), Full); // TODO: [0, (-1 << 0xa) + 1) 1320 EXPECT_EQ(Full.shl(Some), Full); // TODO: [0, (-1 << 0xa) + 1) 1321 EXPECT_EQ(Full.shl(Wrap), Full); 1322 EXPECT_EQ(Empty.shl(Empty), Empty); 1323 EXPECT_EQ(Empty.shl(One), Empty); 1324 EXPECT_EQ(Empty.shl(Some), Empty); 1325 EXPECT_EQ(Empty.shl(Wrap), Empty); 1326 EXPECT_EQ(One.shl(One), ConstantRange(APInt(16, 0xa << 0xa), 1327 APInt(16, (0xa << 0xa) + 1))); 1328 EXPECT_EQ(One.shl(Some), Full); // TODO: [0xa << 0xa, 0) 1329 EXPECT_EQ(One.shl(Wrap), Full); // TODO: [0xa, 0xa << 14 + 1) 1330 EXPECT_EQ(Some.shl(Some), Full); // TODO: [0xa << 0xa, 0xfc01) 1331 EXPECT_EQ(Some.shl(Wrap), Full); // TODO: [0xa, 0x7ff << 0x5 + 1) 1332 EXPECT_EQ(Wrap.shl(Wrap), Full); 1333 EXPECT_EQ( 1334 Some2.shl(ConstantRange(APInt(16, 0x1))), 1335 ConstantRange(APInt(16, 0xfff << 0x1), APInt(16, 0x7fff << 0x1) + 1)); 1336 EXPECT_EQ(One.shl(WrapNullMax), Full); 1337 } 1338 1339 TEST_F(ConstantRangeTest, Lshr) { 1340 EXPECT_EQ(Full.lshr(Full), Full); 1341 EXPECT_EQ(Full.lshr(Empty), Empty); 1342 EXPECT_EQ(Full.lshr(One), ConstantRange(APInt(16, 0), 1343 APInt(16, (0xffff >> 0xa) + 1))); 1344 EXPECT_EQ(Full.lshr(Some), ConstantRange(APInt(16, 0), 1345 APInt(16, (0xffff >> 0xa) + 1))); 1346 EXPECT_EQ(Full.lshr(Wrap), Full); 1347 EXPECT_EQ(Empty.lshr(Empty), Empty); 1348 EXPECT_EQ(Empty.lshr(One), Empty); 1349 EXPECT_EQ(Empty.lshr(Some), Empty); 1350 EXPECT_EQ(Empty.lshr(Wrap), Empty); 1351 EXPECT_EQ(One.lshr(One), ConstantRange(APInt(16, 0))); 1352 EXPECT_EQ(One.lshr(Some), ConstantRange(APInt(16, 0))); 1353 EXPECT_EQ(One.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb))); 1354 EXPECT_EQ(Some.lshr(Some), ConstantRange(APInt(16, 0), 1355 APInt(16, (0xaaa >> 0xa) + 1))); 1356 EXPECT_EQ(Some.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); 1357 EXPECT_EQ(Wrap.lshr(Wrap), Full); 1358 } 1359 1360 TEST_F(ConstantRangeTest, Ashr) { 1361 EXPECT_EQ(Full.ashr(Full), Full); 1362 EXPECT_EQ(Full.ashr(Empty), Empty); 1363 EXPECT_EQ(Full.ashr(One), ConstantRange(APInt(16, 0xffe0), 1364 APInt(16, (0x7fff >> 0xa) + 1 ))); 1365 ConstantRange Small(APInt(16, 0xa), APInt(16, 0xb)); 1366 EXPECT_EQ(Full.ashr(Small), ConstantRange(APInt(16, 0xffe0), 1367 APInt(16, (0x7fff >> 0xa) + 1 ))); 1368 EXPECT_EQ(Full.ashr(Some), ConstantRange(APInt(16, 0xffe0), 1369 APInt(16, (0x7fff >> 0xa) + 1 ))); 1370 EXPECT_EQ(Full.ashr(Wrap), Full); 1371 EXPECT_EQ(Empty.ashr(Empty), Empty); 1372 EXPECT_EQ(Empty.ashr(One), Empty); 1373 EXPECT_EQ(Empty.ashr(Some), Empty); 1374 EXPECT_EQ(Empty.ashr(Wrap), Empty); 1375 EXPECT_EQ(One.ashr(One), ConstantRange(APInt(16, 0))); 1376 EXPECT_EQ(One.ashr(Some), ConstantRange(APInt(16, 0))); 1377 EXPECT_EQ(One.ashr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb))); 1378 EXPECT_EQ(Some.ashr(Some), ConstantRange(APInt(16, 0), 1379 APInt(16, (0xaaa >> 0xa) + 1))); 1380 EXPECT_EQ(Some.ashr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa))); 1381 EXPECT_EQ(Wrap.ashr(Wrap), Full); 1382 ConstantRange Neg(APInt(16, 0xf3f0, true), APInt(16, 0xf7f8, true)); 1383 EXPECT_EQ(Neg.ashr(Small), ConstantRange(APInt(16, 0xfffc, true), 1384 APInt(16, 0xfffe, true))); 1385 } 1386 1387 TEST(ConstantRange, MakeAllowedICmpRegion) { 1388 // PR8250 1389 ConstantRange SMax = ConstantRange(APInt::getSignedMaxValue(32)); 1390 EXPECT_TRUE(ConstantRange::makeAllowedICmpRegion(ICmpInst::ICMP_SGT, SMax) 1391 .isEmptySet()); 1392 } 1393 1394 TEST(ConstantRange, MakeSatisfyingICmpRegion) { 1395 ConstantRange LowHalf(APInt(8, 0), APInt(8, 128)); 1396 ConstantRange HighHalf(APInt(8, 128), APInt(8, 0)); 1397 ConstantRange EmptySet(8, /* isFullSet = */ false); 1398 1399 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_NE, LowHalf), 1400 HighHalf); 1401 1402 EXPECT_EQ( 1403 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_NE, HighHalf), 1404 LowHalf); 1405 1406 EXPECT_TRUE(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_EQ, 1407 HighHalf).isEmptySet()); 1408 1409 ConstantRange UnsignedSample(APInt(8, 5), APInt(8, 200)); 1410 1411 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_ULT, 1412 UnsignedSample), 1413 ConstantRange(APInt(8, 0), APInt(8, 5))); 1414 1415 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_ULE, 1416 UnsignedSample), 1417 ConstantRange(APInt(8, 0), APInt(8, 6))); 1418 1419 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_UGT, 1420 UnsignedSample), 1421 ConstantRange(APInt(8, 200), APInt(8, 0))); 1422 1423 EXPECT_EQ(ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_UGE, 1424 UnsignedSample), 1425 ConstantRange(APInt(8, 199), APInt(8, 0))); 1426 1427 ConstantRange SignedSample(APInt(8, -5), APInt(8, 5)); 1428 1429 EXPECT_EQ( 1430 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SLT, SignedSample), 1431 ConstantRange(APInt(8, -128), APInt(8, -5))); 1432 1433 EXPECT_EQ( 1434 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SLE, SignedSample), 1435 ConstantRange(APInt(8, -128), APInt(8, -4))); 1436 1437 EXPECT_EQ( 1438 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SGT, SignedSample), 1439 ConstantRange(APInt(8, 5), APInt(8, -128))); 1440 1441 EXPECT_EQ( 1442 ConstantRange::makeSatisfyingICmpRegion(ICmpInst::ICMP_SGE, SignedSample), 1443 ConstantRange(APInt(8, 4), APInt(8, -128))); 1444 } 1445 1446 TEST(ConstantRange, MakeGuaranteedNoWrapRegion) { 1447 const int IntMin4Bits = 8; 1448 const int IntMax4Bits = 7; 1449 typedef OverflowingBinaryOperator OBO; 1450 1451 for (int Const : {0, -1, -2, 1, 2, IntMin4Bits, IntMax4Bits}) { 1452 APInt C(4, Const, true /* = isSigned */); 1453 1454 auto NUWRegion = ConstantRange::makeGuaranteedNoWrapRegion( 1455 Instruction::Add, C, OBO::NoUnsignedWrap); 1456 1457 EXPECT_FALSE(NUWRegion.isEmptySet()); 1458 1459 auto NSWRegion = ConstantRange::makeGuaranteedNoWrapRegion( 1460 Instruction::Add, C, OBO::NoSignedWrap); 1461 1462 EXPECT_FALSE(NSWRegion.isEmptySet()); 1463 1464 for (APInt I = NUWRegion.getLower(), E = NUWRegion.getUpper(); I != E; 1465 ++I) { 1466 bool Overflow = false; 1467 (void)I.uadd_ov(C, Overflow); 1468 EXPECT_FALSE(Overflow); 1469 } 1470 1471 for (APInt I = NSWRegion.getLower(), E = NSWRegion.getUpper(); I != E; 1472 ++I) { 1473 bool Overflow = false; 1474 (void)I.sadd_ov(C, Overflow); 1475 EXPECT_FALSE(Overflow); 1476 } 1477 } 1478 1479 for (int Const : {0, -1, -2, 1, 2, IntMin4Bits, IntMax4Bits}) { 1480 APInt C(4, Const, true /* = isSigned */); 1481 1482 auto NUWRegion = ConstantRange::makeGuaranteedNoWrapRegion( 1483 Instruction::Sub, C, OBO::NoUnsignedWrap); 1484 1485 EXPECT_FALSE(NUWRegion.isEmptySet()); 1486 1487 auto NSWRegion = ConstantRange::makeGuaranteedNoWrapRegion( 1488 Instruction::Sub, C, OBO::NoSignedWrap); 1489 1490 EXPECT_FALSE(NSWRegion.isEmptySet()); 1491 1492 for (APInt I = NUWRegion.getLower(), E = NUWRegion.getUpper(); I != E; 1493 ++I) { 1494 bool Overflow = false; 1495 (void)I.usub_ov(C, Overflow); 1496 EXPECT_FALSE(Overflow); 1497 } 1498 1499 for (APInt I = NSWRegion.getLower(), E = NSWRegion.getUpper(); I != E; 1500 ++I) { 1501 bool Overflow = false; 1502 (void)I.ssub_ov(C, Overflow); 1503 EXPECT_FALSE(Overflow); 1504 } 1505 } 1506 1507 auto NSWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion( 1508 Instruction::Add, ConstantRange(32, /* isFullSet = */ true), 1509 OBO::NoSignedWrap); 1510 EXPECT_TRUE(NSWForAllValues.isSingleElement() && 1511 NSWForAllValues.getSingleElement()->isMinValue()); 1512 1513 NSWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion( 1514 Instruction::Sub, ConstantRange(32, /* isFullSet = */ true), 1515 OBO::NoSignedWrap); 1516 EXPECT_TRUE(NSWForAllValues.isSingleElement() && 1517 NSWForAllValues.getSingleElement()->isMaxValue()); 1518 1519 auto NUWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion( 1520 Instruction::Add, ConstantRange(32, /* isFullSet = */ true), 1521 OBO::NoUnsignedWrap); 1522 EXPECT_TRUE(NUWForAllValues.isSingleElement() && 1523 NUWForAllValues.getSingleElement()->isMinValue()); 1524 1525 NUWForAllValues = ConstantRange::makeGuaranteedNoWrapRegion( 1526 Instruction::Sub, ConstantRange(32, /* isFullSet = */ true), 1527 OBO::NoUnsignedWrap); 1528 EXPECT_TRUE(NUWForAllValues.isSingleElement() && 1529 NUWForAllValues.getSingleElement()->isMaxValue()); 1530 1531 EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion( 1532 Instruction::Add, APInt(32, 0), OBO::NoUnsignedWrap).isFullSet()); 1533 EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion( 1534 Instruction::Add, APInt(32, 0), OBO::NoSignedWrap).isFullSet()); 1535 EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion( 1536 Instruction::Sub, APInt(32, 0), OBO::NoUnsignedWrap).isFullSet()); 1537 EXPECT_TRUE(ConstantRange::makeGuaranteedNoWrapRegion( 1538 Instruction::Sub, APInt(32, 0), OBO::NoSignedWrap).isFullSet()); 1539 1540 ConstantRange OneToFive(APInt(32, 1), APInt(32, 6)); 1541 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1542 Instruction::Add, OneToFive, OBO::NoSignedWrap), 1543 ConstantRange(APInt::getSignedMinValue(32), 1544 APInt::getSignedMaxValue(32) - 4)); 1545 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1546 Instruction::Add, OneToFive, OBO::NoUnsignedWrap), 1547 ConstantRange(APInt::getMinValue(32), APInt::getMinValue(32) - 5)); 1548 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1549 Instruction::Sub, OneToFive, OBO::NoSignedWrap), 1550 ConstantRange(APInt::getSignedMinValue(32) + 5, 1551 APInt::getSignedMinValue(32))); 1552 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1553 Instruction::Sub, OneToFive, OBO::NoUnsignedWrap), 1554 ConstantRange(APInt::getMinValue(32) + 5, APInt::getMinValue(32))); 1555 1556 ConstantRange MinusFiveToMinusTwo(APInt(32, -5), APInt(32, -1)); 1557 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1558 Instruction::Add, MinusFiveToMinusTwo, OBO::NoSignedWrap), 1559 ConstantRange(APInt::getSignedMinValue(32) + 5, 1560 APInt::getSignedMinValue(32))); 1561 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1562 Instruction::Add, MinusFiveToMinusTwo, OBO::NoUnsignedWrap), 1563 ConstantRange(APInt(32, 0), APInt(32, 2))); 1564 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1565 Instruction::Sub, MinusFiveToMinusTwo, OBO::NoSignedWrap), 1566 ConstantRange(APInt::getSignedMinValue(32), 1567 APInt::getSignedMaxValue(32) - 4)); 1568 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1569 Instruction::Sub, MinusFiveToMinusTwo, OBO::NoUnsignedWrap), 1570 ConstantRange(APInt::getMaxValue(32) - 1, 1571 APInt::getMinValue(32))); 1572 1573 ConstantRange MinusOneToOne(APInt(32, -1), APInt(32, 2)); 1574 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1575 Instruction::Add, MinusOneToOne, OBO::NoSignedWrap), 1576 ConstantRange(APInt::getSignedMinValue(32) + 1, 1577 APInt::getSignedMinValue(32) - 1)); 1578 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1579 Instruction::Add, MinusOneToOne, OBO::NoUnsignedWrap), 1580 ConstantRange(APInt(32, 0), APInt(32, 1))); 1581 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1582 Instruction::Sub, MinusOneToOne, OBO::NoSignedWrap), 1583 ConstantRange(APInt::getSignedMinValue(32) + 1, 1584 APInt::getSignedMinValue(32) - 1)); 1585 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1586 Instruction::Sub, MinusOneToOne, OBO::NoUnsignedWrap), 1587 ConstantRange(APInt::getMaxValue(32), 1588 APInt::getMinValue(32))); 1589 1590 ConstantRange One(APInt(32, 1), APInt(32, 2)); 1591 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1592 Instruction::Add, One, OBO::NoSignedWrap), 1593 ConstantRange(APInt::getSignedMinValue(32), 1594 APInt::getSignedMaxValue(32))); 1595 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1596 Instruction::Add, One, OBO::NoUnsignedWrap), 1597 ConstantRange(APInt::getMinValue(32), APInt::getMaxValue(32))); 1598 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1599 Instruction::Sub, One, OBO::NoSignedWrap), 1600 ConstantRange(APInt::getSignedMinValue(32) + 1, 1601 APInt::getSignedMinValue(32))); 1602 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1603 Instruction::Sub, One, OBO::NoUnsignedWrap), 1604 ConstantRange(APInt::getMinValue(32) + 1, APInt::getMinValue(32))); 1605 1606 ConstantRange OneLessThanBitWidth(APInt(32, 0), APInt(32, 31) + 1); 1607 ConstantRange UpToBitWidth(APInt(32, 0), APInt(32, 32) + 1); 1608 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1609 Instruction::Shl, UpToBitWidth, OBO::NoUnsignedWrap), 1610 ConstantRange::makeGuaranteedNoWrapRegion( 1611 Instruction::Shl, OneLessThanBitWidth, OBO::NoUnsignedWrap)); 1612 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1613 Instruction::Shl, UpToBitWidth, OBO::NoSignedWrap), 1614 ConstantRange::makeGuaranteedNoWrapRegion( 1615 Instruction::Shl, OneLessThanBitWidth, OBO::NoSignedWrap)); 1616 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1617 Instruction::Shl, UpToBitWidth, OBO::NoUnsignedWrap), 1618 ConstantRange(APInt(32, 0), APInt(32, 1) + 1)); 1619 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1620 Instruction::Shl, UpToBitWidth, OBO::NoSignedWrap), 1621 ConstantRange(APInt(32, -1), APInt(32, 0) + 1)); 1622 1623 EXPECT_EQ( 1624 ConstantRange::makeGuaranteedNoWrapRegion( 1625 Instruction::Shl, ConstantRange::getFull(32), OBO::NoUnsignedWrap), 1626 ConstantRange::makeGuaranteedNoWrapRegion( 1627 Instruction::Shl, OneLessThanBitWidth, OBO::NoUnsignedWrap)); 1628 EXPECT_EQ( 1629 ConstantRange::makeGuaranteedNoWrapRegion( 1630 Instruction::Shl, ConstantRange::getFull(32), OBO::NoSignedWrap), 1631 ConstantRange::makeGuaranteedNoWrapRegion( 1632 Instruction::Shl, OneLessThanBitWidth, OBO::NoSignedWrap)); 1633 1634 ConstantRange IllegalShAmt(APInt(32, 32), APInt(32, 0) + 1); 1635 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1636 Instruction::Shl, IllegalShAmt, OBO::NoUnsignedWrap), 1637 ConstantRange::getFull(32)); 1638 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1639 Instruction::Shl, IllegalShAmt, OBO::NoSignedWrap), 1640 ConstantRange::getFull(32)); 1641 1642 EXPECT_EQ( 1643 ConstantRange::makeGuaranteedNoWrapRegion( 1644 Instruction::Shl, ConstantRange(APInt(32, -32), APInt(32, 16) + 1), 1645 OBO::NoUnsignedWrap), 1646 ConstantRange::makeGuaranteedNoWrapRegion( 1647 Instruction::Shl, ConstantRange(APInt(32, 0), APInt(32, 16) + 1), 1648 OBO::NoUnsignedWrap)); 1649 EXPECT_EQ( 1650 ConstantRange::makeGuaranteedNoWrapRegion( 1651 Instruction::Shl, ConstantRange(APInt(32, -32), APInt(32, 16) + 1), 1652 OBO::NoSignedWrap), 1653 ConstantRange::makeGuaranteedNoWrapRegion( 1654 Instruction::Shl, ConstantRange(APInt(32, 0), APInt(32, 16) + 1), 1655 OBO::NoSignedWrap)); 1656 1657 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1658 Instruction::Shl, 1659 ConstantRange(APInt(32, -32), APInt(32, 16) + 1), 1660 OBO::NoUnsignedWrap), 1661 ConstantRange(APInt(32, 0), APInt(32, 65535) + 1)); 1662 EXPECT_EQ(ConstantRange::makeGuaranteedNoWrapRegion( 1663 Instruction::Shl, 1664 ConstantRange(APInt(32, -32), APInt(32, 16) + 1), 1665 OBO::NoSignedWrap), 1666 ConstantRange(APInt(32, -32768), APInt(32, 32767) + 1)); 1667 } 1668 1669 template<typename Fn> 1670 void TestNoWrapRegionExhaustive(Instruction::BinaryOps BinOp, 1671 unsigned NoWrapKind, Fn OverflowFn) { 1672 unsigned Bits = 5; 1673 EnumerateConstantRanges(Bits, [&](const ConstantRange &CR) { 1674 if (CR.isEmptySet()) 1675 return; 1676 if (Instruction::isShift(BinOp) && CR.getUnsignedMax().uge(Bits)) 1677 return; 1678 1679 ConstantRange NoWrap = 1680 ConstantRange::makeGuaranteedNoWrapRegion(BinOp, CR, NoWrapKind); 1681 ConstantRange Full = ConstantRange::getFull(Bits); 1682 ForeachNumInConstantRange(Full, [&](const APInt &N1) { 1683 bool NoOverflow = true; 1684 bool Overflow = true; 1685 ForeachNumInConstantRange(CR, [&](const APInt &N2) { 1686 if (OverflowFn(N1, N2)) 1687 NoOverflow = false; 1688 else 1689 Overflow = false; 1690 }); 1691 EXPECT_EQ(NoOverflow, NoWrap.contains(N1)); 1692 1693 // The no-wrap range is exact for single-element ranges. 1694 if (CR.isSingleElement()) { 1695 EXPECT_EQ(Overflow, !NoWrap.contains(N1)); 1696 } 1697 }); 1698 }); 1699 } 1700 1701 // Show that makeGuaranteedNoWrapRegion() is maximal, and for single-element 1702 // ranges also exact. 1703 TEST(ConstantRange, NoWrapRegionExhaustive) { 1704 TestNoWrapRegionExhaustive( 1705 Instruction::Add, OverflowingBinaryOperator::NoUnsignedWrap, 1706 [](const APInt &N1, const APInt &N2) { 1707 bool Overflow; 1708 (void) N1.uadd_ov(N2, Overflow); 1709 return Overflow; 1710 }); 1711 TestNoWrapRegionExhaustive( 1712 Instruction::Add, OverflowingBinaryOperator::NoSignedWrap, 1713 [](const APInt &N1, const APInt &N2) { 1714 bool Overflow; 1715 (void) N1.sadd_ov(N2, Overflow); 1716 return Overflow; 1717 }); 1718 TestNoWrapRegionExhaustive( 1719 Instruction::Sub, OverflowingBinaryOperator::NoUnsignedWrap, 1720 [](const APInt &N1, const APInt &N2) { 1721 bool Overflow; 1722 (void) N1.usub_ov(N2, Overflow); 1723 return Overflow; 1724 }); 1725 TestNoWrapRegionExhaustive( 1726 Instruction::Sub, OverflowingBinaryOperator::NoSignedWrap, 1727 [](const APInt &N1, const APInt &N2) { 1728 bool Overflow; 1729 (void) N1.ssub_ov(N2, Overflow); 1730 return Overflow; 1731 }); 1732 TestNoWrapRegionExhaustive( 1733 Instruction::Mul, OverflowingBinaryOperator::NoUnsignedWrap, 1734 [](const APInt &N1, const APInt &N2) { 1735 bool Overflow; 1736 (void) N1.umul_ov(N2, Overflow); 1737 return Overflow; 1738 }); 1739 TestNoWrapRegionExhaustive( 1740 Instruction::Mul, OverflowingBinaryOperator::NoSignedWrap, 1741 [](const APInt &N1, const APInt &N2) { 1742 bool Overflow; 1743 (void) N1.smul_ov(N2, Overflow); 1744 return Overflow; 1745 }); 1746 TestNoWrapRegionExhaustive(Instruction::Shl, 1747 OverflowingBinaryOperator::NoUnsignedWrap, 1748 [](const APInt &N1, const APInt &N2) { 1749 bool Overflow; 1750 (void)N1.ushl_ov(N2, Overflow); 1751 return Overflow; 1752 }); 1753 TestNoWrapRegionExhaustive(Instruction::Shl, 1754 OverflowingBinaryOperator::NoSignedWrap, 1755 [](const APInt &N1, const APInt &N2) { 1756 bool Overflow; 1757 (void)N1.sshl_ov(N2, Overflow); 1758 return Overflow; 1759 }); 1760 } 1761 1762 TEST(ConstantRange, GetEquivalentICmp) { 1763 APInt RHS; 1764 CmpInst::Predicate Pred; 1765 1766 EXPECT_TRUE(ConstantRange(APInt::getMinValue(32), APInt(32, 100)) 1767 .getEquivalentICmp(Pred, RHS)); 1768 EXPECT_EQ(Pred, CmpInst::ICMP_ULT); 1769 EXPECT_EQ(RHS, APInt(32, 100)); 1770 1771 EXPECT_TRUE(ConstantRange(APInt::getSignedMinValue(32), APInt(32, 100)) 1772 .getEquivalentICmp(Pred, RHS)); 1773 EXPECT_EQ(Pred, CmpInst::ICMP_SLT); 1774 EXPECT_EQ(RHS, APInt(32, 100)); 1775 1776 EXPECT_TRUE(ConstantRange(APInt(32, 100), APInt::getMinValue(32)) 1777 .getEquivalentICmp(Pred, RHS)); 1778 EXPECT_EQ(Pred, CmpInst::ICMP_UGE); 1779 EXPECT_EQ(RHS, APInt(32, 100)); 1780 1781 EXPECT_TRUE(ConstantRange(APInt(32, 100), APInt::getSignedMinValue(32)) 1782 .getEquivalentICmp(Pred, RHS)); 1783 EXPECT_EQ(Pred, CmpInst::ICMP_SGE); 1784 EXPECT_EQ(RHS, APInt(32, 100)); 1785 1786 EXPECT_TRUE( 1787 ConstantRange(32, /*isFullSet=*/true).getEquivalentICmp(Pred, RHS)); 1788 EXPECT_EQ(Pred, CmpInst::ICMP_UGE); 1789 EXPECT_EQ(RHS, APInt(32, 0)); 1790 1791 EXPECT_TRUE( 1792 ConstantRange(32, /*isFullSet=*/false).getEquivalentICmp(Pred, RHS)); 1793 EXPECT_EQ(Pred, CmpInst::ICMP_ULT); 1794 EXPECT_EQ(RHS, APInt(32, 0)); 1795 1796 EXPECT_FALSE(ConstantRange(APInt(32, 100), APInt(32, 200)) 1797 .getEquivalentICmp(Pred, RHS)); 1798 1799 EXPECT_FALSE(ConstantRange(APInt::getSignedMinValue(32) - APInt(32, 100), 1800 APInt::getSignedMinValue(32) + APInt(32, 100)) 1801 .getEquivalentICmp(Pred, RHS)); 1802 1803 EXPECT_FALSE(ConstantRange(APInt::getMinValue(32) - APInt(32, 100), 1804 APInt::getMinValue(32) + APInt(32, 100)) 1805 .getEquivalentICmp(Pred, RHS)); 1806 1807 EXPECT_TRUE(ConstantRange(APInt(32, 100)).getEquivalentICmp(Pred, RHS)); 1808 EXPECT_EQ(Pred, CmpInst::ICMP_EQ); 1809 EXPECT_EQ(RHS, APInt(32, 100)); 1810 1811 EXPECT_TRUE( 1812 ConstantRange(APInt(32, 100)).inverse().getEquivalentICmp(Pred, RHS)); 1813 EXPECT_EQ(Pred, CmpInst::ICMP_NE); 1814 EXPECT_EQ(RHS, APInt(32, 100)); 1815 1816 EXPECT_TRUE( 1817 ConstantRange(APInt(512, 100)).inverse().getEquivalentICmp(Pred, RHS)); 1818 EXPECT_EQ(Pred, CmpInst::ICMP_NE); 1819 EXPECT_EQ(RHS, APInt(512, 100)); 1820 1821 // NB! It would be correct for the following four calls to getEquivalentICmp 1822 // to return ordered predicates like CmpInst::ICMP_ULT or CmpInst::ICMP_UGT. 1823 // However, that's not the case today. 1824 1825 EXPECT_TRUE(ConstantRange(APInt(32, 0)).getEquivalentICmp(Pred, RHS)); 1826 EXPECT_EQ(Pred, CmpInst::ICMP_EQ); 1827 EXPECT_EQ(RHS, APInt(32, 0)); 1828 1829 EXPECT_TRUE( 1830 ConstantRange(APInt(32, 0)).inverse().getEquivalentICmp(Pred, RHS)); 1831 EXPECT_EQ(Pred, CmpInst::ICMP_NE); 1832 EXPECT_EQ(RHS, APInt(32, 0)); 1833 1834 EXPECT_TRUE(ConstantRange(APInt(32, -1)).getEquivalentICmp(Pred, RHS)); 1835 EXPECT_EQ(Pred, CmpInst::ICMP_EQ); 1836 EXPECT_EQ(RHS, APInt(32, -1)); 1837 1838 EXPECT_TRUE( 1839 ConstantRange(APInt(32, -1)).inverse().getEquivalentICmp(Pred, RHS)); 1840 EXPECT_EQ(Pred, CmpInst::ICMP_NE); 1841 EXPECT_EQ(RHS, APInt(32, -1)); 1842 } 1843 1844 #define EXPECT_MAY_OVERFLOW(op) \ 1845 EXPECT_EQ(ConstantRange::OverflowResult::MayOverflow, (op)) 1846 #define EXPECT_ALWAYS_OVERFLOWS_LOW(op) \ 1847 EXPECT_EQ(ConstantRange::OverflowResult::AlwaysOverflowsLow, (op)) 1848 #define EXPECT_ALWAYS_OVERFLOWS_HIGH(op) \ 1849 EXPECT_EQ(ConstantRange::OverflowResult::AlwaysOverflowsHigh, (op)) 1850 #define EXPECT_NEVER_OVERFLOWS(op) \ 1851 EXPECT_EQ(ConstantRange::OverflowResult::NeverOverflows, (op)) 1852 1853 TEST_F(ConstantRangeTest, UnsignedAddOverflow) { 1854 // Ill-defined - may overflow is a conservative result. 1855 EXPECT_MAY_OVERFLOW(Some.unsignedAddMayOverflow(Empty)); 1856 EXPECT_MAY_OVERFLOW(Empty.unsignedAddMayOverflow(Some)); 1857 1858 // Never overflow despite one full/wrap set. 1859 ConstantRange Zero(APInt::getNullValue(16)); 1860 EXPECT_NEVER_OVERFLOWS(Full.unsignedAddMayOverflow(Zero)); 1861 EXPECT_NEVER_OVERFLOWS(Wrap.unsignedAddMayOverflow(Zero)); 1862 EXPECT_NEVER_OVERFLOWS(Zero.unsignedAddMayOverflow(Full)); 1863 EXPECT_NEVER_OVERFLOWS(Zero.unsignedAddMayOverflow(Wrap)); 1864 1865 // But usually full/wrap always may overflow. 1866 EXPECT_MAY_OVERFLOW(Full.unsignedAddMayOverflow(One)); 1867 EXPECT_MAY_OVERFLOW(Wrap.unsignedAddMayOverflow(One)); 1868 EXPECT_MAY_OVERFLOW(One.unsignedAddMayOverflow(Full)); 1869 EXPECT_MAY_OVERFLOW(One.unsignedAddMayOverflow(Wrap)); 1870 1871 ConstantRange A(APInt(16, 0xfd00), APInt(16, 0xfe00)); 1872 ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201)); 1873 ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202)); 1874 EXPECT_NEVER_OVERFLOWS(A.unsignedAddMayOverflow(B1)); 1875 EXPECT_MAY_OVERFLOW(A.unsignedAddMayOverflow(B2)); 1876 EXPECT_NEVER_OVERFLOWS(B1.unsignedAddMayOverflow(A)); 1877 EXPECT_MAY_OVERFLOW(B2.unsignedAddMayOverflow(A)); 1878 1879 ConstantRange C1(APInt(16, 0x0299), APInt(16, 0x0400)); 1880 ConstantRange C2(APInt(16, 0x0300), APInt(16, 0x0400)); 1881 EXPECT_MAY_OVERFLOW(A.unsignedAddMayOverflow(C1)); 1882 EXPECT_ALWAYS_OVERFLOWS_HIGH(A.unsignedAddMayOverflow(C2)); 1883 EXPECT_MAY_OVERFLOW(C1.unsignedAddMayOverflow(A)); 1884 EXPECT_ALWAYS_OVERFLOWS_HIGH(C2.unsignedAddMayOverflow(A)); 1885 } 1886 1887 TEST_F(ConstantRangeTest, UnsignedSubOverflow) { 1888 // Ill-defined - may overflow is a conservative result. 1889 EXPECT_MAY_OVERFLOW(Some.unsignedSubMayOverflow(Empty)); 1890 EXPECT_MAY_OVERFLOW(Empty.unsignedSubMayOverflow(Some)); 1891 1892 // Never overflow despite one full/wrap set. 1893 ConstantRange Zero(APInt::getNullValue(16)); 1894 ConstantRange Max(APInt::getAllOnesValue(16)); 1895 EXPECT_NEVER_OVERFLOWS(Full.unsignedSubMayOverflow(Zero)); 1896 EXPECT_NEVER_OVERFLOWS(Wrap.unsignedSubMayOverflow(Zero)); 1897 EXPECT_NEVER_OVERFLOWS(Max.unsignedSubMayOverflow(Full)); 1898 EXPECT_NEVER_OVERFLOWS(Max.unsignedSubMayOverflow(Wrap)); 1899 1900 // But usually full/wrap always may overflow. 1901 EXPECT_MAY_OVERFLOW(Full.unsignedSubMayOverflow(One)); 1902 EXPECT_MAY_OVERFLOW(Wrap.unsignedSubMayOverflow(One)); 1903 EXPECT_MAY_OVERFLOW(One.unsignedSubMayOverflow(Full)); 1904 EXPECT_MAY_OVERFLOW(One.unsignedSubMayOverflow(Wrap)); 1905 1906 ConstantRange A(APInt(16, 0x0000), APInt(16, 0x0100)); 1907 ConstantRange B(APInt(16, 0x0100), APInt(16, 0x0200)); 1908 EXPECT_NEVER_OVERFLOWS(B.unsignedSubMayOverflow(A)); 1909 EXPECT_ALWAYS_OVERFLOWS_LOW(A.unsignedSubMayOverflow(B)); 1910 1911 ConstantRange A1(APInt(16, 0x0000), APInt(16, 0x0101)); 1912 ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201)); 1913 EXPECT_NEVER_OVERFLOWS(B1.unsignedSubMayOverflow(A1)); 1914 EXPECT_MAY_OVERFLOW(A1.unsignedSubMayOverflow(B1)); 1915 1916 ConstantRange A2(APInt(16, 0x0000), APInt(16, 0x0102)); 1917 ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202)); 1918 EXPECT_MAY_OVERFLOW(B2.unsignedSubMayOverflow(A2)); 1919 EXPECT_MAY_OVERFLOW(A2.unsignedSubMayOverflow(B2)); 1920 } 1921 1922 TEST_F(ConstantRangeTest, SignedAddOverflow) { 1923 // Ill-defined - may overflow is a conservative result. 1924 EXPECT_MAY_OVERFLOW(Some.signedAddMayOverflow(Empty)); 1925 EXPECT_MAY_OVERFLOW(Empty.signedAddMayOverflow(Some)); 1926 1927 // Never overflow despite one full/wrap set. 1928 ConstantRange Zero(APInt::getNullValue(16)); 1929 EXPECT_NEVER_OVERFLOWS(Full.signedAddMayOverflow(Zero)); 1930 EXPECT_NEVER_OVERFLOWS(Wrap.signedAddMayOverflow(Zero)); 1931 EXPECT_NEVER_OVERFLOWS(Zero.signedAddMayOverflow(Full)); 1932 EXPECT_NEVER_OVERFLOWS(Zero.signedAddMayOverflow(Wrap)); 1933 1934 // But usually full/wrap always may overflow. 1935 EXPECT_MAY_OVERFLOW(Full.signedAddMayOverflow(One)); 1936 EXPECT_MAY_OVERFLOW(Wrap.signedAddMayOverflow(One)); 1937 EXPECT_MAY_OVERFLOW(One.signedAddMayOverflow(Full)); 1938 EXPECT_MAY_OVERFLOW(One.signedAddMayOverflow(Wrap)); 1939 1940 ConstantRange A(APInt(16, 0x7d00), APInt(16, 0x7e00)); 1941 ConstantRange B1(APInt(16, 0x0100), APInt(16, 0x0201)); 1942 ConstantRange B2(APInt(16, 0x0100), APInt(16, 0x0202)); 1943 EXPECT_NEVER_OVERFLOWS(A.signedAddMayOverflow(B1)); 1944 EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B2)); 1945 ConstantRange B3(APInt(16, 0x8000), APInt(16, 0x0201)); 1946 ConstantRange B4(APInt(16, 0x8000), APInt(16, 0x0202)); 1947 EXPECT_NEVER_OVERFLOWS(A.signedAddMayOverflow(B3)); 1948 EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B4)); 1949 ConstantRange B5(APInt(16, 0x0299), APInt(16, 0x0400)); 1950 ConstantRange B6(APInt(16, 0x0300), APInt(16, 0x0400)); 1951 EXPECT_MAY_OVERFLOW(A.signedAddMayOverflow(B5)); 1952 EXPECT_ALWAYS_OVERFLOWS_HIGH(A.signedAddMayOverflow(B6)); 1953 1954 ConstantRange C(APInt(16, 0x8200), APInt(16, 0x8300)); 1955 ConstantRange D1(APInt(16, 0xfe00), APInt(16, 0xff00)); 1956 ConstantRange D2(APInt(16, 0xfd99), APInt(16, 0xff00)); 1957 EXPECT_NEVER_OVERFLOWS(C.signedAddMayOverflow(D1)); 1958 EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D2)); 1959 ConstantRange D3(APInt(16, 0xfe00), APInt(16, 0x8000)); 1960 ConstantRange D4(APInt(16, 0xfd99), APInt(16, 0x8000)); 1961 EXPECT_NEVER_OVERFLOWS(C.signedAddMayOverflow(D3)); 1962 EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D4)); 1963 ConstantRange D5(APInt(16, 0xfc00), APInt(16, 0xfd02)); 1964 ConstantRange D6(APInt(16, 0xfc00), APInt(16, 0xfd01)); 1965 EXPECT_MAY_OVERFLOW(C.signedAddMayOverflow(D5)); 1966 EXPECT_ALWAYS_OVERFLOWS_LOW(C.signedAddMayOverflow(D6)); 1967 1968 ConstantRange E(APInt(16, 0xff00), APInt(16, 0x0100)); 1969 EXPECT_NEVER_OVERFLOWS(E.signedAddMayOverflow(E)); 1970 ConstantRange F(APInt(16, 0xf000), APInt(16, 0x7000)); 1971 EXPECT_MAY_OVERFLOW(F.signedAddMayOverflow(F)); 1972 } 1973 1974 TEST_F(ConstantRangeTest, SignedSubOverflow) { 1975 // Ill-defined - may overflow is a conservative result. 1976 EXPECT_MAY_OVERFLOW(Some.signedSubMayOverflow(Empty)); 1977 EXPECT_MAY_OVERFLOW(Empty.signedSubMayOverflow(Some)); 1978 1979 // Never overflow despite one full/wrap set. 1980 ConstantRange Zero(APInt::getNullValue(16)); 1981 EXPECT_NEVER_OVERFLOWS(Full.signedSubMayOverflow(Zero)); 1982 EXPECT_NEVER_OVERFLOWS(Wrap.signedSubMayOverflow(Zero)); 1983 1984 // But usually full/wrap always may overflow. 1985 EXPECT_MAY_OVERFLOW(Full.signedSubMayOverflow(One)); 1986 EXPECT_MAY_OVERFLOW(Wrap.signedSubMayOverflow(One)); 1987 EXPECT_MAY_OVERFLOW(One.signedSubMayOverflow(Full)); 1988 EXPECT_MAY_OVERFLOW(One.signedSubMayOverflow(Wrap)); 1989 1990 ConstantRange A(APInt(16, 0x7d00), APInt(16, 0x7e00)); 1991 ConstantRange B1(APInt(16, 0xfe00), APInt(16, 0xff00)); 1992 ConstantRange B2(APInt(16, 0xfd99), APInt(16, 0xff00)); 1993 EXPECT_NEVER_OVERFLOWS(A.signedSubMayOverflow(B1)); 1994 EXPECT_MAY_OVERFLOW(A.signedSubMayOverflow(B2)); 1995 ConstantRange B3(APInt(16, 0xfc00), APInt(16, 0xfd02)); 1996 ConstantRange B4(APInt(16, 0xfc00), APInt(16, 0xfd01)); 1997 EXPECT_MAY_OVERFLOW(A.signedSubMayOverflow(B3)); 1998 EXPECT_ALWAYS_OVERFLOWS_HIGH(A.signedSubMayOverflow(B4)); 1999 2000 ConstantRange C(APInt(16, 0x8200), APInt(16, 0x8300)); 2001 ConstantRange D1(APInt(16, 0x0100), APInt(16, 0x0201)); 2002 ConstantRange D2(APInt(16, 0x0100), APInt(16, 0x0202)); 2003 EXPECT_NEVER_OVERFLOWS(C.signedSubMayOverflow(D1)); 2004 EXPECT_MAY_OVERFLOW(C.signedSubMayOverflow(D2)); 2005 ConstantRange D3(APInt(16, 0x0299), APInt(16, 0x0400)); 2006 ConstantRange D4(APInt(16, 0x0300), APInt(16, 0x0400)); 2007 EXPECT_MAY_OVERFLOW(C.signedSubMayOverflow(D3)); 2008 EXPECT_ALWAYS_OVERFLOWS_LOW(C.signedSubMayOverflow(D4)); 2009 2010 ConstantRange E(APInt(16, 0xff00), APInt(16, 0x0100)); 2011 EXPECT_NEVER_OVERFLOWS(E.signedSubMayOverflow(E)); 2012 ConstantRange F(APInt(16, 0xf000), APInt(16, 0x7001)); 2013 EXPECT_MAY_OVERFLOW(F.signedSubMayOverflow(F)); 2014 } 2015 2016 template<typename Fn1, typename Fn2> 2017 static void TestOverflowExhaustive(Fn1 OverflowFn, Fn2 MayOverflowFn) { 2018 // Constant range overflow checks are tested exhaustively on 4-bit numbers. 2019 unsigned Bits = 4; 2020 EnumerateTwoConstantRanges(Bits, [=](const ConstantRange &CR1, 2021 const ConstantRange &CR2) { 2022 // Loop over all N1 in CR1 and N2 in CR2 and check whether any of the 2023 // operations have overflow / have no overflow. 2024 bool RangeHasOverflowLow = false; 2025 bool RangeHasOverflowHigh = false; 2026 bool RangeHasNoOverflow = false; 2027 ForeachNumInConstantRange(CR1, [&](const APInt &N1) { 2028 ForeachNumInConstantRange(CR2, [&](const APInt &N2) { 2029 bool IsOverflowHigh; 2030 if (!OverflowFn(IsOverflowHigh, N1, N2)) { 2031 RangeHasNoOverflow = true; 2032 return; 2033 } 2034 2035 if (IsOverflowHigh) 2036 RangeHasOverflowHigh = true; 2037 else 2038 RangeHasOverflowLow = true; 2039 }); 2040 }); 2041 2042 ConstantRange::OverflowResult OR = MayOverflowFn(CR1, CR2); 2043 switch (OR) { 2044 case ConstantRange::OverflowResult::AlwaysOverflowsLow: 2045 EXPECT_TRUE(RangeHasOverflowLow); 2046 EXPECT_FALSE(RangeHasOverflowHigh); 2047 EXPECT_FALSE(RangeHasNoOverflow); 2048 break; 2049 case ConstantRange::OverflowResult::AlwaysOverflowsHigh: 2050 EXPECT_TRUE(RangeHasOverflowHigh); 2051 EXPECT_FALSE(RangeHasOverflowLow); 2052 EXPECT_FALSE(RangeHasNoOverflow); 2053 break; 2054 case ConstantRange::OverflowResult::NeverOverflows: 2055 EXPECT_FALSE(RangeHasOverflowLow); 2056 EXPECT_FALSE(RangeHasOverflowHigh); 2057 EXPECT_TRUE(RangeHasNoOverflow); 2058 break; 2059 case ConstantRange::OverflowResult::MayOverflow: 2060 // We return MayOverflow for empty sets as a conservative result, 2061 // but of course neither the RangeHasOverflow nor the 2062 // RangeHasNoOverflow flags will be set. 2063 if (CR1.isEmptySet() || CR2.isEmptySet()) 2064 break; 2065 2066 EXPECT_TRUE(RangeHasOverflowLow || RangeHasOverflowHigh); 2067 EXPECT_TRUE(RangeHasNoOverflow); 2068 break; 2069 } 2070 }); 2071 } 2072 2073 TEST_F(ConstantRangeTest, UnsignedAddOverflowExhaustive) { 2074 TestOverflowExhaustive( 2075 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) { 2076 bool Overflow; 2077 (void) N1.uadd_ov(N2, Overflow); 2078 IsOverflowHigh = true; 2079 return Overflow; 2080 }, 2081 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2082 return CR1.unsignedAddMayOverflow(CR2); 2083 }); 2084 } 2085 2086 TEST_F(ConstantRangeTest, UnsignedSubOverflowExhaustive) { 2087 TestOverflowExhaustive( 2088 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) { 2089 bool Overflow; 2090 (void) N1.usub_ov(N2, Overflow); 2091 IsOverflowHigh = false; 2092 return Overflow; 2093 }, 2094 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2095 return CR1.unsignedSubMayOverflow(CR2); 2096 }); 2097 } 2098 2099 TEST_F(ConstantRangeTest, UnsignedMulOverflowExhaustive) { 2100 TestOverflowExhaustive( 2101 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) { 2102 bool Overflow; 2103 (void) N1.umul_ov(N2, Overflow); 2104 IsOverflowHigh = true; 2105 return Overflow; 2106 }, 2107 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2108 return CR1.unsignedMulMayOverflow(CR2); 2109 }); 2110 } 2111 2112 TEST_F(ConstantRangeTest, SignedAddOverflowExhaustive) { 2113 TestOverflowExhaustive( 2114 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) { 2115 bool Overflow; 2116 (void) N1.sadd_ov(N2, Overflow); 2117 IsOverflowHigh = N1.isNonNegative(); 2118 return Overflow; 2119 }, 2120 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2121 return CR1.signedAddMayOverflow(CR2); 2122 }); 2123 } 2124 2125 TEST_F(ConstantRangeTest, SignedSubOverflowExhaustive) { 2126 TestOverflowExhaustive( 2127 [](bool &IsOverflowHigh, const APInt &N1, const APInt &N2) { 2128 bool Overflow; 2129 (void) N1.ssub_ov(N2, Overflow); 2130 IsOverflowHigh = N1.isNonNegative(); 2131 return Overflow; 2132 }, 2133 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2134 return CR1.signedSubMayOverflow(CR2); 2135 }); 2136 } 2137 2138 TEST_F(ConstantRangeTest, FromKnownBits) { 2139 KnownBits Unknown(16); 2140 EXPECT_EQ(Full, ConstantRange::fromKnownBits(Unknown, /*signed*/false)); 2141 EXPECT_EQ(Full, ConstantRange::fromKnownBits(Unknown, /*signed*/true)); 2142 2143 // .10..01. -> unsigned 01000010 (66) to 11011011 (219) 2144 // -> signed 11000010 (194) to 01011011 (91) 2145 KnownBits Known(8); 2146 Known.Zero = 36; 2147 Known.One = 66; 2148 ConstantRange Unsigned(APInt(8, 66), APInt(8, 219 + 1)); 2149 ConstantRange Signed(APInt(8, 194), APInt(8, 91 + 1)); 2150 EXPECT_EQ(Unsigned, ConstantRange::fromKnownBits(Known, /*signed*/false)); 2151 EXPECT_EQ(Signed, ConstantRange::fromKnownBits(Known, /*signed*/true)); 2152 2153 // 1.10.10. -> 10100100 (164) to 11101101 (237) 2154 Known.Zero = 18; 2155 Known.One = 164; 2156 ConstantRange CR1(APInt(8, 164), APInt(8, 237 + 1)); 2157 EXPECT_EQ(CR1, ConstantRange::fromKnownBits(Known, /*signed*/false)); 2158 EXPECT_EQ(CR1, ConstantRange::fromKnownBits(Known, /*signed*/true)); 2159 2160 // 01.0.1.0 -> 01000100 (68) to 01101110 (110) 2161 Known.Zero = 145; 2162 Known.One = 68; 2163 ConstantRange CR2(APInt(8, 68), APInt(8, 110 + 1)); 2164 EXPECT_EQ(CR2, ConstantRange::fromKnownBits(Known, /*signed*/false)); 2165 EXPECT_EQ(CR2, ConstantRange::fromKnownBits(Known, /*signed*/true)); 2166 } 2167 2168 TEST_F(ConstantRangeTest, FromKnownBitsExhaustive) { 2169 unsigned Bits = 4; 2170 unsigned Max = 1 << Bits; 2171 KnownBits Known(Bits); 2172 for (unsigned Zero = 0; Zero < Max; ++Zero) { 2173 for (unsigned One = 0; One < Max; ++One) { 2174 Known.Zero = Zero; 2175 Known.One = One; 2176 if (Known.hasConflict() || Known.isUnknown()) 2177 continue; 2178 2179 APInt MinUnsigned = APInt::getMaxValue(Bits); 2180 APInt MaxUnsigned = APInt::getMinValue(Bits); 2181 APInt MinSigned = APInt::getSignedMaxValue(Bits); 2182 APInt MaxSigned = APInt::getSignedMinValue(Bits); 2183 for (unsigned N = 0; N < Max; ++N) { 2184 APInt Num(Bits, N); 2185 if ((Num & Known.Zero) != 0 || (~Num & Known.One) != 0) 2186 continue; 2187 2188 if (Num.ult(MinUnsigned)) MinUnsigned = Num; 2189 if (Num.ugt(MaxUnsigned)) MaxUnsigned = Num; 2190 if (Num.slt(MinSigned)) MinSigned = Num; 2191 if (Num.sgt(MaxSigned)) MaxSigned = Num; 2192 } 2193 2194 ConstantRange UnsignedCR(MinUnsigned, MaxUnsigned + 1); 2195 ConstantRange SignedCR(MinSigned, MaxSigned + 1); 2196 EXPECT_EQ(UnsignedCR, ConstantRange::fromKnownBits(Known, false)); 2197 EXPECT_EQ(SignedCR, ConstantRange::fromKnownBits(Known, true)); 2198 } 2199 } 2200 } 2201 2202 TEST_F(ConstantRangeTest, Negative) { 2203 // All elements in an empty set (of which there are none) are both negative 2204 // and non-negative. Empty & full sets checked explicitly for clarity, but 2205 // they are also covered by the exhaustive test below. 2206 EXPECT_TRUE(Empty.isAllNegative()); 2207 EXPECT_TRUE(Empty.isAllNonNegative()); 2208 EXPECT_FALSE(Full.isAllNegative()); 2209 EXPECT_FALSE(Full.isAllNonNegative()); 2210 2211 unsigned Bits = 4; 2212 EnumerateConstantRanges(Bits, [](const ConstantRange &CR) { 2213 bool AllNegative = true; 2214 bool AllNonNegative = true; 2215 ForeachNumInConstantRange(CR, [&](const APInt &N) { 2216 if (!N.isNegative()) 2217 AllNegative = false; 2218 if (!N.isNonNegative()) 2219 AllNonNegative = false; 2220 }); 2221 assert((CR.isEmptySet() || !AllNegative || !AllNonNegative) && 2222 "Only empty set can be both all negative and all non-negative"); 2223 2224 EXPECT_EQ(AllNegative, CR.isAllNegative()); 2225 EXPECT_EQ(AllNonNegative, CR.isAllNonNegative()); 2226 }); 2227 } 2228 2229 TEST_F(ConstantRangeTest, UAddSat) { 2230 TestUnsignedBinOpExhaustive( 2231 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2232 return CR1.uadd_sat(CR2); 2233 }, 2234 [](const APInt &N1, const APInt &N2) { 2235 return N1.uadd_sat(N2); 2236 }); 2237 } 2238 2239 TEST_F(ConstantRangeTest, USubSat) { 2240 TestUnsignedBinOpExhaustive( 2241 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2242 return CR1.usub_sat(CR2); 2243 }, 2244 [](const APInt &N1, const APInt &N2) { 2245 return N1.usub_sat(N2); 2246 }); 2247 } 2248 2249 TEST_F(ConstantRangeTest, UMulSat) { 2250 TestUnsignedBinOpExhaustive( 2251 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2252 return CR1.umul_sat(CR2); 2253 }, 2254 [](const APInt &N1, const APInt &N2) { return N1.umul_sat(N2); }); 2255 } 2256 2257 TEST_F(ConstantRangeTest, UShlSat) { 2258 TestUnsignedBinOpExhaustive( 2259 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2260 return CR1.ushl_sat(CR2); 2261 }, 2262 [](const APInt &N1, const APInt &N2) { return N1.ushl_sat(N2); }); 2263 } 2264 2265 TEST_F(ConstantRangeTest, SAddSat) { 2266 TestSignedBinOpExhaustive( 2267 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2268 return CR1.sadd_sat(CR2); 2269 }, 2270 [](const APInt &N1, const APInt &N2) { 2271 return N1.sadd_sat(N2); 2272 }); 2273 } 2274 2275 TEST_F(ConstantRangeTest, SSubSat) { 2276 TestSignedBinOpExhaustive( 2277 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2278 return CR1.ssub_sat(CR2); 2279 }, 2280 [](const APInt &N1, const APInt &N2) { 2281 return N1.ssub_sat(N2); 2282 }); 2283 } 2284 2285 TEST_F(ConstantRangeTest, SMulSat) { 2286 TestSignedBinOpExhaustive( 2287 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2288 return CR1.smul_sat(CR2); 2289 }, 2290 [](const APInt &N1, const APInt &N2) { return N1.smul_sat(N2); }); 2291 } 2292 2293 TEST_F(ConstantRangeTest, SShlSat) { 2294 TestSignedBinOpExhaustive( 2295 [](const ConstantRange &CR1, const ConstantRange &CR2) { 2296 return CR1.sshl_sat(CR2); 2297 }, 2298 [](const APInt &N1, const APInt &N2) { return N1.sshl_sat(N2); }); 2299 } 2300 2301 TEST_F(ConstantRangeTest, Abs) { 2302 // We're working with unsigned integers here, because it makes the signed 2303 // min case non-wrapping. 2304 TestUnsignedUnaryOpExhaustive( 2305 [](const ConstantRange &CR) { return CR.abs(); }, 2306 [](const APInt &N) { return N.abs(); }); 2307 2308 TestUnsignedUnaryOpExhaustive( 2309 [](const ConstantRange &CR) { return CR.abs(/*IntMinIsPoison=*/true); }, 2310 [](const APInt &N) { return N.abs(); }, 2311 /*SkipSignedIntMin=*/true); 2312 } 2313 2314 TEST_F(ConstantRangeTest, castOps) { 2315 ConstantRange A(APInt(16, 66), APInt(16, 128)); 2316 ConstantRange FpToI8 = A.castOp(Instruction::FPToSI, 8); 2317 EXPECT_EQ(8u, FpToI8.getBitWidth()); 2318 EXPECT_TRUE(FpToI8.isFullSet()); 2319 2320 ConstantRange FpToI16 = A.castOp(Instruction::FPToSI, 16); 2321 EXPECT_EQ(16u, FpToI16.getBitWidth()); 2322 EXPECT_EQ(A, FpToI16); 2323 2324 ConstantRange FPExtToDouble = A.castOp(Instruction::FPExt, 64); 2325 EXPECT_EQ(64u, FPExtToDouble.getBitWidth()); 2326 EXPECT_TRUE(FPExtToDouble.isFullSet()); 2327 2328 ConstantRange PtrToInt = A.castOp(Instruction::PtrToInt, 64); 2329 EXPECT_EQ(64u, PtrToInt.getBitWidth()); 2330 EXPECT_TRUE(PtrToInt.isFullSet()); 2331 2332 ConstantRange IntToPtr = A.castOp(Instruction::IntToPtr, 64); 2333 EXPECT_EQ(64u, IntToPtr.getBitWidth()); 2334 EXPECT_TRUE(IntToPtr.isFullSet()); 2335 } 2336 2337 TEST_F(ConstantRangeTest, binaryXor) { 2338 // Single element ranges. 2339 ConstantRange R16(APInt(8, 16)); 2340 ConstantRange R20(APInt(8, 20)); 2341 EXPECT_EQ(*R16.binaryXor(R16).getSingleElement(), APInt(8, 0)); 2342 EXPECT_EQ(*R16.binaryXor(R20).getSingleElement(), APInt(8, 16 ^ 20)); 2343 2344 // Ranges with more than a single element. Handled conservatively for now. 2345 ConstantRange R16_35(APInt(8, 16), APInt(8, 35)); 2346 ConstantRange R0_99(APInt(8, 0), APInt(8, 99)); 2347 EXPECT_TRUE(R16_35.binaryXor(R16_35).isFullSet()); 2348 EXPECT_TRUE(R16_35.binaryXor(R0_99).isFullSet()); 2349 EXPECT_TRUE(R0_99.binaryXor(R16_35).isFullSet()); 2350 } 2351 2352 } // anonymous namespace 2353