unittests/Support/ConstantRangeTest.cpp

   1 //===- llvm/unittest/Support/ConstantRangeTest.cpp - ConstantRange tests --===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/Support/ConstantRange.h"
  11 #include "llvm/IR/Instructions.h"
  12 #include "gtest/gtest.h"
  13
  14 using namespace llvm;
  15
  16 namespace {
  17
  18 class ConstantRangeTest : public ::testing::Test {
  19 protected:
  20   static ConstantRange Full;
  21   static ConstantRange Empty;
  22   static ConstantRange One;
  23   static ConstantRange Some;
  24   static ConstantRange Wrap;
  25 };
  26
  27 ConstantRange ConstantRangeTest::Full(16);
  28 ConstantRange ConstantRangeTest::Empty(16, false);
  29 ConstantRange ConstantRangeTest::One(APInt(16, 0xa));
  30 ConstantRange ConstantRangeTest::Some(APInt(16, 0xa), APInt(16, 0xaaa));
  31 ConstantRange ConstantRangeTest::Wrap(APInt(16, 0xaaa), APInt(16, 0xa));
  32
  33 TEST_F(ConstantRangeTest, Basics) {
  34   EXPECT_TRUE(Full.isFullSet());
  35   EXPECT_FALSE(Full.isEmptySet());
  36   EXPECT_TRUE(Full.inverse().isEmptySet());
  37   EXPECT_FALSE(Full.isWrappedSet());
  38   EXPECT_TRUE(Full.contains(APInt(16, 0x0)));
  39   EXPECT_TRUE(Full.contains(APInt(16, 0x9)));
  40   EXPECT_TRUE(Full.contains(APInt(16, 0xa)));
  41   EXPECT_TRUE(Full.contains(APInt(16, 0xaa9)));
  42   EXPECT_TRUE(Full.contains(APInt(16, 0xaaa)));
  43
  44   EXPECT_FALSE(Empty.isFullSet());
  45   EXPECT_TRUE(Empty.isEmptySet());
  46   EXPECT_TRUE(Empty.inverse().isFullSet());
  47   EXPECT_FALSE(Empty.isWrappedSet());
  48   EXPECT_FALSE(Empty.contains(APInt(16, 0x0)));
  49   EXPECT_FALSE(Empty.contains(APInt(16, 0x9)));
  50   EXPECT_FALSE(Empty.contains(APInt(16, 0xa)));
  51   EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9)));
  52   EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa)));
  53
  54   EXPECT_FALSE(One.isFullSet());
  55   EXPECT_FALSE(One.isEmptySet());
  56   EXPECT_FALSE(One.isWrappedSet());
  57   EXPECT_FALSE(One.contains(APInt(16, 0x0)));
  58   EXPECT_FALSE(One.contains(APInt(16, 0x9)));
  59   EXPECT_TRUE(One.contains(APInt(16, 0xa)));
  60   EXPECT_FALSE(One.contains(APInt(16, 0xaa9)));
  61   EXPECT_FALSE(One.contains(APInt(16, 0xaaa)));
  62   EXPECT_FALSE(One.inverse().contains(APInt(16, 0xa)));
  63
  64   EXPECT_FALSE(Some.isFullSet());
  65   EXPECT_FALSE(Some.isEmptySet());
  66   EXPECT_FALSE(Some.isWrappedSet());
  67   EXPECT_FALSE(Some.contains(APInt(16, 0x0)));
  68   EXPECT_FALSE(Some.contains(APInt(16, 0x9)));
  69   EXPECT_TRUE(Some.contains(APInt(16, 0xa)));
  70   EXPECT_TRUE(Some.contains(APInt(16, 0xaa9)));
  71   EXPECT_FALSE(Some.contains(APInt(16, 0xaaa)));
  72
  73   EXPECT_FALSE(Wrap.isFullSet());
  74   EXPECT_FALSE(Wrap.isEmptySet());
  75   EXPECT_TRUE(Wrap.isWrappedSet());
  76   EXPECT_TRUE(Wrap.contains(APInt(16, 0x0)));
  77   EXPECT_TRUE(Wrap.contains(APInt(16, 0x9)));
  78   EXPECT_FALSE(Wrap.contains(APInt(16, 0xa)));
  79   EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9)));
  80   EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa)));
  81 }
  82
  83 TEST_F(ConstantRangeTest, Equality) {
  84   EXPECT_EQ(Full, Full);
  85   EXPECT_EQ(Empty, Empty);
  86   EXPECT_EQ(One, One);
  87   EXPECT_EQ(Some, Some);
  88   EXPECT_EQ(Wrap, Wrap);
  89   EXPECT_NE(Full, Empty);
  90   EXPECT_NE(Full, One);
  91   EXPECT_NE(Full, Some);
  92   EXPECT_NE(Full, Wrap);
  93   EXPECT_NE(Empty, One);
  94   EXPECT_NE(Empty, Some);
  95   EXPECT_NE(Empty, Wrap);
  96   EXPECT_NE(One, Some);
  97   EXPECT_NE(One, Wrap);
  98   EXPECT_NE(Some, Wrap);
  99 }
 100
 101 TEST_F(ConstantRangeTest, SingleElement) {
 102   EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(NULL));
 103   EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(NULL));
 104   EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa));
 105   EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(NULL));
 106   EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(NULL));
 107
 108   EXPECT_FALSE(Full.isSingleElement());
 109   EXPECT_FALSE(Empty.isSingleElement());
 110   EXPECT_TRUE(One.isSingleElement());
 111   EXPECT_FALSE(Some.isSingleElement());
 112   EXPECT_FALSE(Wrap.isSingleElement());
 113 }
 114
 115 TEST_F(ConstantRangeTest, GetSetSize) {
 116   EXPECT_EQ(Full.getSetSize(), APInt(17, 65536));
 117   EXPECT_EQ(Empty.getSetSize(), APInt(17, 0));
 118   EXPECT_EQ(One.getSetSize(), APInt(17, 1));
 119   EXPECT_EQ(Some.getSetSize(), APInt(17, 0xaa0));
 120
 121   ConstantRange Wrap(APInt(4, 7), APInt(4, 3));
 122   ConstantRange Wrap2(APInt(4, 8), APInt(4, 7));
 123   EXPECT_EQ(Wrap.getSetSize(), APInt(5, 12));
 124   EXPECT_EQ(Wrap2.getSetSize(), APInt(5, 15));
 125 }
 126
 127 TEST_F(ConstantRangeTest, GetMinsAndMaxes) {
 128   EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX));
 129   EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa));
 130   EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9));
 131   EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX));
 132
 133   EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0));
 134   EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa));
 135   EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa));
 136   EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0));
 137
 138   EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX));
 139   EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa));
 140   EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9));
 141   EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX));
 142
 143   EXPECT_EQ(Full.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
 144   EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa));
 145   EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa));
 146   EXPECT_EQ(Wrap.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
 147
 148   // Found by Klee
 149   EXPECT_EQ(ConstantRange(APInt(4, 7), APInt(4, 0)).getSignedMax(),
 150             APInt(4, 7));
 151 }
 152
 153 TEST_F(ConstantRangeTest, SignWrapped) {
 154   EXPECT_TRUE(Full.isSignWrappedSet());
 155   EXPECT_FALSE(Empty.isSignWrappedSet());
 156   EXPECT_FALSE(One.isSignWrappedSet());
 157   EXPECT_FALSE(Some.isSignWrappedSet());
 158   EXPECT_TRUE(Wrap.isSignWrappedSet());
 159
 160   EXPECT_FALSE(ConstantRange(APInt(8, 127), APInt(8, 128)).isSignWrappedSet());
 161   EXPECT_TRUE(ConstantRange(APInt(8, 127), APInt(8, 129)).isSignWrappedSet());
 162   EXPECT_FALSE(ConstantRange(APInt(8, 128), APInt(8, 129)).isSignWrappedSet());
 163   EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 9)).isSignWrappedSet());
 164   EXPECT_TRUE(ConstantRange(APInt(8, 10), APInt(8, 250)).isSignWrappedSet());
 165   EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 10)).isSignWrappedSet());
 166   EXPECT_FALSE(ConstantRange(APInt(8, 250), APInt(8, 251)).isSignWrappedSet());
 167 }
 168
 169 TEST_F(ConstantRangeTest, Trunc) {
 170   ConstantRange TFull = Full.truncate(10);
 171   ConstantRange TEmpty = Empty.truncate(10);
 172   ConstantRange TOne = One.truncate(10);
 173   ConstantRange TSome = Some.truncate(10);
 174   ConstantRange TWrap = Wrap.truncate(10);
 175   EXPECT_TRUE(TFull.isFullSet());
 176   EXPECT_TRUE(TEmpty.isEmptySet());
 177   EXPECT_EQ(TOne, ConstantRange(One.getLower().trunc(10),
 178                                 One.getUpper().trunc(10)));
 179   EXPECT_TRUE(TSome.isFullSet());
 180 }
 181
 182 TEST_F(ConstantRangeTest, ZExt) {
 183   ConstantRange ZFull = Full.zeroExtend(20);
 184   ConstantRange ZEmpty = Empty.zeroExtend(20);
 185   ConstantRange ZOne = One.zeroExtend(20);
 186   ConstantRange ZSome = Some.zeroExtend(20);
 187   ConstantRange ZWrap = Wrap.zeroExtend(20);
 188   EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
 189   EXPECT_TRUE(ZEmpty.isEmptySet());
 190   EXPECT_EQ(ZOne, ConstantRange(One.getLower().zext(20),
 191                                 One.getUpper().zext(20)));
 192   EXPECT_EQ(ZSome, ConstantRange(Some.getLower().zext(20),
 193                                  Some.getUpper().zext(20)));
 194   EXPECT_EQ(ZWrap, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
 195
 196   // zext([5, 0), 3->7) = [5, 8)
 197   ConstantRange FiveZero(APInt(3, 5), APInt(3, 0));
 198   EXPECT_EQ(FiveZero.zeroExtend(7), ConstantRange(APInt(7, 5), APInt(7, 8)));
 199 }
 200
 201 TEST_F(ConstantRangeTest, SExt) {
 202   ConstantRange SFull = Full.signExtend(20);
 203   ConstantRange SEmpty = Empty.signExtend(20);
 204   ConstantRange SOne = One.signExtend(20);
 205   ConstantRange SSome = Some.signExtend(20);
 206   ConstantRange SWrap = Wrap.signExtend(20);
 207   EXPECT_EQ(SFull, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
 208                                  APInt(20, INT16_MAX + 1, true)));
 209   EXPECT_TRUE(SEmpty.isEmptySet());
 210   EXPECT_EQ(SOne, ConstantRange(One.getLower().sext(20),
 211                                 One.getUpper().sext(20)));
 212   EXPECT_EQ(SSome, ConstantRange(Some.getLower().sext(20),
 213                                  Some.getUpper().sext(20)));
 214   EXPECT_EQ(SWrap, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
 215                                  APInt(20, INT16_MAX + 1, true)));
 216
 217   EXPECT_EQ(ConstantRange(APInt(8, 120), APInt(8, 140)).signExtend(16),
 218             ConstantRange(APInt(16, -128), APInt(16, 128)));
 219 }
 220
 221 TEST_F(ConstantRangeTest, IntersectWith) {
 222   EXPECT_EQ(Empty.intersectWith(Full), Empty);
 223   EXPECT_EQ(Empty.intersectWith(Empty), Empty);
 224   EXPECT_EQ(Empty.intersectWith(One), Empty);
 225   EXPECT_EQ(Empty.intersectWith(Some), Empty);
 226   EXPECT_EQ(Empty.intersectWith(Wrap), Empty);
 227   EXPECT_EQ(Full.intersectWith(Full), Full);
 228   EXPECT_EQ(Some.intersectWith(Some), Some);
 229   EXPECT_EQ(Some.intersectWith(One), One);
 230   EXPECT_EQ(Full.intersectWith(One), One);
 231   EXPECT_EQ(Full.intersectWith(Some), Some);
 232   EXPECT_EQ(Some.intersectWith(Wrap), Empty);
 233   EXPECT_EQ(One.intersectWith(Wrap), Empty);
 234   EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One));
 235
 236   // Klee generated testcase from PR4545.
 237   // The intersection of i16 [4, 2) and [6, 5) is disjoint, looking like
 238   // 01..4.6789ABCDEF where the dots represent values not in the intersection.
 239   ConstantRange LHS(APInt(16, 4), APInt(16, 2));
 240   ConstantRange RHS(APInt(16, 6), APInt(16, 5));
 241   EXPECT_TRUE(LHS.intersectWith(RHS) == LHS);
 242
 243   // previous bug: intersection of [min, 3) and [2, max) should be 2
 244   LHS = ConstantRange(APInt(32, -2147483646), APInt(32, 3));
 245   RHS = ConstantRange(APInt(32, 2), APInt(32, 2147483646));
 246   EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2)));
 247
 248   // [2, 0) /\ [4, 3) = [2, 0)
 249   LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
 250   RHS = ConstantRange(APInt(32, 4), APInt(32, 3));
 251   EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 2), APInt(32, 0)));
 252
 253   // [2, 0) /\ [4, 2) = [4, 0)
 254   LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
 255   RHS = ConstantRange(APInt(32, 4), APInt(32, 2));
 256   EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 0)));
 257
 258   // [4, 2) /\ [5, 1) = [5, 1)
 259   LHS = ConstantRange(APInt(32, 4), APInt(32, 2));
 260   RHS = ConstantRange(APInt(32, 5), APInt(32, 1));
 261   EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 5), APInt(32, 1)));
 262
 263   // [2, 0) /\ [7, 4) = [7, 4)
 264   LHS = ConstantRange(APInt(32, 2), APInt(32, 0));
 265   RHS = ConstantRange(APInt(32, 7), APInt(32, 4));
 266   EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 7), APInt(32, 4)));
 267
 268   // [4, 2) /\ [1, 0) = [1, 0)
 269   LHS = ConstantRange(APInt(32, 4), APInt(32, 2));
 270   RHS = ConstantRange(APInt(32, 1), APInt(32, 0));
 271   EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 4), APInt(32, 2)));
 272
 273   // [15, 0) /\ [7, 6) = [15, 0)
 274   LHS = ConstantRange(APInt(32, 15), APInt(32, 0));
 275   RHS = ConstantRange(APInt(32, 7), APInt(32, 6));
 276   EXPECT_EQ(LHS.intersectWith(RHS), ConstantRange(APInt(32, 15), APInt(32, 0)));
 277 }
 278
 279 TEST_F(ConstantRangeTest, UnionWith) {
 280   EXPECT_EQ(Wrap.unionWith(One),
 281             ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb)));
 282   EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One));
 283   EXPECT_EQ(Empty.unionWith(Empty), Empty);
 284   EXPECT_EQ(Full.unionWith(Full), Full);
 285   EXPECT_EQ(Some.unionWith(Wrap), Full);
 286
 287   // PR4545
 288   EXPECT_EQ(ConstantRange(APInt(16, 14), APInt(16, 1)).unionWith(
 289                                     ConstantRange(APInt(16, 0), APInt(16, 8))),
 290             ConstantRange(APInt(16, 14), APInt(16, 8)));
 291   EXPECT_EQ(ConstantRange(APInt(16, 6), APInt(16, 4)).unionWith(
 292                                     ConstantRange(APInt(16, 4), APInt(16, 0))),
 293               ConstantRange(16));
 294   EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 0)).unionWith(
 295                                     ConstantRange(APInt(16, 2), APInt(16, 1))),
 296               ConstantRange(16));
 297 }
 298
 299 TEST_F(ConstantRangeTest, SetDifference) {
 300   EXPECT_EQ(Full.difference(Empty), Full);
 301   EXPECT_EQ(Full.difference(Full), Empty);
 302   EXPECT_EQ(Empty.difference(Empty), Empty);
 303   EXPECT_EQ(Empty.difference(Full), Empty);
 304
 305   ConstantRange A(APInt(16, 3), APInt(16, 7));
 306   ConstantRange B(APInt(16, 5), APInt(16, 9));
 307   ConstantRange C(APInt(16, 3), APInt(16, 5));
 308   ConstantRange D(APInt(16, 7), APInt(16, 9));
 309   ConstantRange E(APInt(16, 5), APInt(16, 4));
 310   ConstantRange F(APInt(16, 7), APInt(16, 3));
 311   EXPECT_EQ(A.difference(B), C);
 312   EXPECT_EQ(B.difference(A), D);
 313   EXPECT_EQ(E.difference(A), F);
 314 }
 315
 316 TEST_F(ConstantRangeTest, SubtractAPInt) {
 317   EXPECT_EQ(Full.subtract(APInt(16, 4)), Full);
 318   EXPECT_EQ(Empty.subtract(APInt(16, 4)), Empty);
 319   EXPECT_EQ(Some.subtract(APInt(16, 4)),
 320             ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
 321   EXPECT_EQ(Wrap.subtract(APInt(16, 4)),
 322             ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
 323   EXPECT_EQ(One.subtract(APInt(16, 4)),
 324             ConstantRange(APInt(16, 0x6)));
 325 }
 326
 327 TEST_F(ConstantRangeTest, Add) {
 328   EXPECT_EQ(Full.add(APInt(16, 4)), Full);
 329   EXPECT_EQ(Full.add(Full), Full);
 330   EXPECT_EQ(Full.add(Empty), Empty);
 331   EXPECT_EQ(Full.add(One), Full);
 332   EXPECT_EQ(Full.add(Some), Full);
 333   EXPECT_EQ(Full.add(Wrap), Full);
 334   EXPECT_EQ(Empty.add(Empty), Empty);
 335   EXPECT_EQ(Empty.add(One), Empty);
 336   EXPECT_EQ(Empty.add(Some), Empty);
 337   EXPECT_EQ(Empty.add(Wrap), Empty);
 338   EXPECT_EQ(Empty.add(APInt(16, 4)), Empty);
 339   EXPECT_EQ(Some.add(APInt(16, 4)),
 340             ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
 341   EXPECT_EQ(Wrap.add(APInt(16, 4)),
 342             ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
 343   EXPECT_EQ(One.add(APInt(16, 4)),
 344             ConstantRange(APInt(16, 0xe)));
 345 }
 346
 347 TEST_F(ConstantRangeTest, Sub) {
 348   EXPECT_EQ(Full.sub(APInt(16, 4)), Full);
 349   EXPECT_EQ(Full.sub(Full), Full);
 350   EXPECT_EQ(Full.sub(Empty), Empty);
 351   EXPECT_EQ(Full.sub(One), Full);
 352   EXPECT_EQ(Full.sub(Some), Full);
 353   EXPECT_EQ(Full.sub(Wrap), Full);
 354   EXPECT_EQ(Empty.sub(Empty), Empty);
 355   EXPECT_EQ(Empty.sub(One), Empty);
 356   EXPECT_EQ(Empty.sub(Some), Empty);
 357   EXPECT_EQ(Empty.sub(Wrap), Empty);
 358   EXPECT_EQ(Empty.sub(APInt(16, 4)), Empty);
 359   EXPECT_EQ(Some.sub(APInt(16, 4)),
 360             ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
 361   EXPECT_EQ(Some.sub(Some),
 362             ConstantRange(APInt(16, 0xf561), APInt(16, 0xaa0)));
 363   EXPECT_EQ(Wrap.sub(APInt(16, 4)),
 364             ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
 365   EXPECT_EQ(One.sub(APInt(16, 4)),
 366             ConstantRange(APInt(16, 0x6)));
 367 }
 368
 369 TEST_F(ConstantRangeTest, Multiply) {
 370   EXPECT_EQ(Full.multiply(Full), Full);
 371   EXPECT_EQ(Full.multiply(Empty), Empty);
 372   EXPECT_EQ(Full.multiply(One), Full);
 373   EXPECT_EQ(Full.multiply(Some), Full);
 374   EXPECT_EQ(Full.multiply(Wrap), Full);
 375   EXPECT_EQ(Empty.multiply(Empty), Empty);
 376   EXPECT_EQ(Empty.multiply(One), Empty);
 377   EXPECT_EQ(Empty.multiply(Some), Empty);
 378   EXPECT_EQ(Empty.multiply(Wrap), Empty);
 379   EXPECT_EQ(One.multiply(One), ConstantRange(APInt(16, 0xa*0xa),
 380                                              APInt(16, 0xa*0xa + 1)));
 381   EXPECT_EQ(One.multiply(Some), ConstantRange(APInt(16, 0xa*0xa),
 382                                               APInt(16, 0xa*0xaa9 + 1)));
 383   EXPECT_EQ(One.multiply(Wrap), Full);
 384   EXPECT_EQ(Some.multiply(Some), Full);
 385   EXPECT_EQ(Some.multiply(Wrap), Full);
 386   EXPECT_EQ(Wrap.multiply(Wrap), Full);
 387
 388   ConstantRange Zero(APInt(16, 0));
 389   EXPECT_EQ(Zero.multiply(Full), Zero);
 390   EXPECT_EQ(Zero.multiply(Some), Zero);
 391   EXPECT_EQ(Zero.multiply(Wrap), Zero);
 392   EXPECT_EQ(Full.multiply(Zero), Zero);
 393   EXPECT_EQ(Some.multiply(Zero), Zero);
 394   EXPECT_EQ(Wrap.multiply(Zero), Zero);
 395
 396   // http://llvm.org/PR4545
 397   EXPECT_EQ(ConstantRange(APInt(4, 1), APInt(4, 6)).multiply(
 398                 ConstantRange(APInt(4, 6), APInt(4, 2))),
 399             ConstantRange(4, /*isFullSet=*/true));
 400 }
 401
 402 TEST_F(ConstantRangeTest, UMax) {
 403   EXPECT_EQ(Full.umax(Full), Full);
 404   EXPECT_EQ(Full.umax(Empty), Empty);
 405   EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 406   EXPECT_EQ(Full.umax(Wrap), Full);
 407   EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 408   EXPECT_EQ(Empty.umax(Empty), Empty);
 409   EXPECT_EQ(Empty.umax(Some), Empty);
 410   EXPECT_EQ(Empty.umax(Wrap), Empty);
 411   EXPECT_EQ(Empty.umax(One), Empty);
 412   EXPECT_EQ(Some.umax(Some), Some);
 413   EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 414   EXPECT_EQ(Some.umax(One), Some);
 415   // TODO: ConstantRange is currently over-conservative here.
 416   EXPECT_EQ(Wrap.umax(Wrap), Full);
 417   EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 418   EXPECT_EQ(One.umax(One), One);
 419 }
 420
 421 TEST_F(ConstantRangeTest, SMax) {
 422   EXPECT_EQ(Full.smax(Full), Full);
 423   EXPECT_EQ(Full.smax(Empty), Empty);
 424   EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa),
 425                                            APInt::getSignedMinValue(16)));
 426   EXPECT_EQ(Full.smax(Wrap), Full);
 427   EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa),
 428                                           APInt::getSignedMinValue(16)));
 429   EXPECT_EQ(Empty.smax(Empty), Empty);
 430   EXPECT_EQ(Empty.smax(Some), Empty);
 431   EXPECT_EQ(Empty.smax(Wrap), Empty);
 432   EXPECT_EQ(Empty.smax(One), Empty);
 433   EXPECT_EQ(Some.smax(Some), Some);
 434   EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa),
 435                                            APInt(16, (uint64_t)INT16_MIN)));
 436   EXPECT_EQ(Some.smax(One), Some);
 437   EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
 438                                           APInt(16, (uint64_t)INT16_MIN)));
 439   EXPECT_EQ(One.smax(One), One);
 440 }
 441
 442 TEST_F(ConstantRangeTest, UDiv) {
 443   EXPECT_EQ(Full.udiv(Full), Full);
 444   EXPECT_EQ(Full.udiv(Empty), Empty);
 445   EXPECT_EQ(Full.udiv(One), ConstantRange(APInt(16, 0),
 446                                           APInt(16, 0xffff / 0xa + 1)));
 447   EXPECT_EQ(Full.udiv(Some), ConstantRange(APInt(16, 0),
 448                                            APInt(16, 0xffff / 0xa + 1)));
 449   EXPECT_EQ(Full.udiv(Wrap), Full);
 450   EXPECT_EQ(Empty.udiv(Empty), Empty);
 451   EXPECT_EQ(Empty.udiv(One), Empty);
 452   EXPECT_EQ(Empty.udiv(Some), Empty);
 453   EXPECT_EQ(Empty.udiv(Wrap), Empty);
 454   EXPECT_EQ(One.udiv(One), ConstantRange(APInt(16, 1)));
 455   EXPECT_EQ(One.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 2)));
 456   EXPECT_EQ(One.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
 457   EXPECT_EQ(Some.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 0x111)));
 458   EXPECT_EQ(Some.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
 459   EXPECT_EQ(Wrap.udiv(Wrap), Full);
 460 }
 461
 462 TEST_F(ConstantRangeTest, Shl) {
 463   EXPECT_EQ(Full.shl(Full), Full);
 464   EXPECT_EQ(Full.shl(Empty), Empty);
 465   EXPECT_EQ(Full.shl(One), Full);    // TODO: [0, (-1 << 0xa) + 1)
 466   EXPECT_EQ(Full.shl(Some), Full);   // TODO: [0, (-1 << 0xa) + 1)
 467   EXPECT_EQ(Full.shl(Wrap), Full);
 468   EXPECT_EQ(Empty.shl(Empty), Empty);
 469   EXPECT_EQ(Empty.shl(One), Empty);
 470   EXPECT_EQ(Empty.shl(Some), Empty);
 471   EXPECT_EQ(Empty.shl(Wrap), Empty);
 472   EXPECT_EQ(One.shl(One), ConstantRange(APInt(16, 0xa << 0xa),
 473                                         APInt(16, (0xa << 0xa) + 1)));
 474   EXPECT_EQ(One.shl(Some), Full);    // TODO: [0xa << 0xa, 0)
 475   EXPECT_EQ(One.shl(Wrap), Full);    // TODO: [0xa, 0xa << 14 + 1)
 476   EXPECT_EQ(Some.shl(Some), Full);   // TODO: [0xa << 0xa, 0xfc01)
 477   EXPECT_EQ(Some.shl(Wrap), Full);   // TODO: [0xa, 0x7ff << 0x5 + 1)
 478   EXPECT_EQ(Wrap.shl(Wrap), Full);
 479 }
 480
 481 TEST_F(ConstantRangeTest, Lshr) {
 482   EXPECT_EQ(Full.lshr(Full), Full);
 483   EXPECT_EQ(Full.lshr(Empty), Empty);
 484   EXPECT_EQ(Full.lshr(One), ConstantRange(APInt(16, 0),
 485                                           APInt(16, (0xffff >> 0xa) + 1)));
 486   EXPECT_EQ(Full.lshr(Some), ConstantRange(APInt(16, 0),
 487                                            APInt(16, (0xffff >> 0xa) + 1)));
 488   EXPECT_EQ(Full.lshr(Wrap), Full);
 489   EXPECT_EQ(Empty.lshr(Empty), Empty);
 490   EXPECT_EQ(Empty.lshr(One), Empty);
 491   EXPECT_EQ(Empty.lshr(Some), Empty);
 492   EXPECT_EQ(Empty.lshr(Wrap), Empty);
 493   EXPECT_EQ(One.lshr(One), ConstantRange(APInt(16, 0)));
 494   EXPECT_EQ(One.lshr(Some), ConstantRange(APInt(16, 0)));
 495   EXPECT_EQ(One.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
 496   EXPECT_EQ(Some.lshr(Some), ConstantRange(APInt(16, 0),
 497                                            APInt(16, (0xaaa >> 0xa) + 1)));
 498   EXPECT_EQ(Some.lshr(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
 499   EXPECT_EQ(Wrap.lshr(Wrap), Full);
 500 }
 501
 502 TEST(ConstantRange, MakeICmpRegion) {
 503   // PR8250
 504   ConstantRange SMax = ConstantRange(APInt::getSignedMaxValue(32));
 505   EXPECT_TRUE(ConstantRange::makeICmpRegion(ICmpInst::ICMP_SGT,
 506                                             SMax).isEmptySet());
 507 }
 508
 509 }  // anonymous namespace