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