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
  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_FALSE(Full.isWrappedSet());
  37   EXPECT_TRUE(Full.contains(APInt(16, 0x0)));
  38   EXPECT_TRUE(Full.contains(APInt(16, 0x9)));
  39   EXPECT_TRUE(Full.contains(APInt(16, 0xa)));
  40   EXPECT_TRUE(Full.contains(APInt(16, 0xaa9)));
  41   EXPECT_TRUE(Full.contains(APInt(16, 0xaaa)));
  42
  43   EXPECT_FALSE(Empty.isFullSet());
  44   EXPECT_TRUE(Empty.isEmptySet());
  45   EXPECT_FALSE(Empty.isWrappedSet());
  46   EXPECT_FALSE(Empty.contains(APInt(16, 0x0)));
  47   EXPECT_FALSE(Empty.contains(APInt(16, 0x9)));
  48   EXPECT_FALSE(Empty.contains(APInt(16, 0xa)));
  49   EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9)));
  50   EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa)));
  51
  52   EXPECT_FALSE(One.isFullSet());
  53   EXPECT_FALSE(One.isEmptySet());
  54   EXPECT_FALSE(One.isWrappedSet());
  55   EXPECT_FALSE(One.contains(APInt(16, 0x0)));
  56   EXPECT_FALSE(One.contains(APInt(16, 0x9)));
  57   EXPECT_TRUE(One.contains(APInt(16, 0xa)));
  58   EXPECT_FALSE(One.contains(APInt(16, 0xaa9)));
  59   EXPECT_FALSE(One.contains(APInt(16, 0xaaa)));
  60
  61   EXPECT_FALSE(Some.isFullSet());
  62   EXPECT_FALSE(Some.isEmptySet());
  63   EXPECT_FALSE(Some.isWrappedSet());
  64   EXPECT_FALSE(Some.contains(APInt(16, 0x0)));
  65   EXPECT_FALSE(Some.contains(APInt(16, 0x9)));
  66   EXPECT_TRUE(Some.contains(APInt(16, 0xa)));
  67   EXPECT_TRUE(Some.contains(APInt(16, 0xaa9)));
  68   EXPECT_FALSE(Some.contains(APInt(16, 0xaaa)));
  69
  70   EXPECT_FALSE(Wrap.isFullSet());
  71   EXPECT_FALSE(Wrap.isEmptySet());
  72   EXPECT_TRUE(Wrap.isWrappedSet());
  73   EXPECT_TRUE(Wrap.contains(APInt(16, 0x0)));
  74   EXPECT_TRUE(Wrap.contains(APInt(16, 0x9)));
  75   EXPECT_FALSE(Wrap.contains(APInt(16, 0xa)));
  76   EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9)));
  77   EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa)));
  78 }
  79
  80 TEST_F(ConstantRangeTest, Equality) {
  81   EXPECT_EQ(Full, Full);
  82   EXPECT_EQ(Empty, Empty);
  83   EXPECT_EQ(One, One);
  84   EXPECT_EQ(Some, Some);
  85   EXPECT_EQ(Wrap, Wrap);
  86   EXPECT_NE(Full, Empty);
  87   EXPECT_NE(Full, One);
  88   EXPECT_NE(Full, Some);
  89   EXPECT_NE(Full, Wrap);
  90   EXPECT_NE(Empty, One);
  91   EXPECT_NE(Empty, Some);
  92   EXPECT_NE(Empty, Wrap);
  93   EXPECT_NE(One, Some);
  94   EXPECT_NE(One, Wrap);
  95   EXPECT_NE(Some, Wrap);
  96 }
  97
  98 TEST_F(ConstantRangeTest, SingleElement) {
  99   EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(NULL));
 100   EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(NULL));
 101   EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa));
 102   EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(NULL));
 103   EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(NULL));
 104
 105   EXPECT_FALSE(Full.isSingleElement());
 106   EXPECT_FALSE(Empty.isSingleElement());
 107   EXPECT_TRUE(One.isSingleElement());
 108   EXPECT_FALSE(Some.isSingleElement());
 109   EXPECT_FALSE(Wrap.isSingleElement());
 110 }
 111
 112 TEST_F(ConstantRangeTest, GetSetSize) {
 113   EXPECT_EQ(Full.getSetSize(), APInt(16, 0));
 114   EXPECT_EQ(Empty.getSetSize(), APInt(16, 0));
 115   EXPECT_EQ(One.getSetSize(), APInt(16, 1));
 116   EXPECT_EQ(Some.getSetSize(), APInt(16, 0xaa0));
 117   EXPECT_EQ(Wrap.getSetSize(), APInt(16, 0x10000 - 0xaa0));
 118 }
 119
 120 TEST_F(ConstantRangeTest, GetMinsAndMaxes) {
 121   EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX));
 122   EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa));
 123   EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9));
 124   EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX));
 125
 126   EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0));
 127   EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa));
 128   EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa));
 129   EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0));
 130
 131   EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX));
 132   EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa));
 133   EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9));
 134   EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX));
 135
 136   EXPECT_EQ(Full.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
 137   EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa));
 138   EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa));
 139   EXPECT_EQ(Wrap.getSignedMin(), APInt(16, (uint64_t)INT16_MIN));
 140
 141   // Found by Klee
 142   EXPECT_EQ(ConstantRange(APInt(4, 7), APInt(4, 0)).getSignedMax(),
 143             APInt(4, 7));
 144 }
 145
 146 TEST_F(ConstantRangeTest, Trunc) {
 147   ConstantRange TFull = Full.truncate(10);
 148   ConstantRange TEmpty = Empty.truncate(10);
 149   ConstantRange TOne = One.truncate(10);
 150   ConstantRange TSome = Some.truncate(10);
 151   ConstantRange TWrap = Wrap.truncate(10);
 152   EXPECT_TRUE(TFull.isFullSet());
 153   EXPECT_TRUE(TEmpty.isEmptySet());
 154   EXPECT_EQ(TOne, ConstantRange(APInt(One.getLower()).trunc(10),
 155                                 APInt(One.getUpper()).trunc(10)));
 156   EXPECT_TRUE(TSome.isFullSet());
 157 }
 158
 159 TEST_F(ConstantRangeTest, ZExt) {
 160   ConstantRange ZFull = Full.zeroExtend(20);
 161   ConstantRange ZEmpty = Empty.zeroExtend(20);
 162   ConstantRange ZOne = One.zeroExtend(20);
 163   ConstantRange ZSome = Some.zeroExtend(20);
 164   ConstantRange ZWrap = Wrap.zeroExtend(20);
 165   EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
 166   EXPECT_TRUE(ZEmpty.isEmptySet());
 167   EXPECT_EQ(ZOne, ConstantRange(APInt(One.getLower()).zext(20),
 168                                 APInt(One.getUpper()).zext(20)));
 169   EXPECT_EQ(ZSome, ConstantRange(APInt(Some.getLower()).zext(20),
 170                                  APInt(Some.getUpper()).zext(20)));
 171   EXPECT_EQ(ZWrap, ConstantRange(APInt(Wrap.getLower()).zext(20),
 172                                  APInt(Wrap.getUpper()).zext(20)));
 173 }
 174
 175 TEST_F(ConstantRangeTest, SExt) {
 176   ConstantRange SFull = Full.signExtend(20);
 177   ConstantRange SEmpty = Empty.signExtend(20);
 178   ConstantRange SOne = One.signExtend(20);
 179   ConstantRange SSome = Some.signExtend(20);
 180   ConstantRange SWrap = Wrap.signExtend(20);
 181   EXPECT_EQ(SFull, ConstantRange(APInt(20, (uint64_t)INT16_MIN, true),
 182                                  APInt(20, INT16_MAX + 1, true)));
 183   EXPECT_TRUE(SEmpty.isEmptySet());
 184   EXPECT_EQ(SOne, ConstantRange(APInt(One.getLower()).sext(20),
 185                                 APInt(One.getUpper()).sext(20)));
 186   EXPECT_EQ(SSome, ConstantRange(APInt(Some.getLower()).sext(20),
 187                                  APInt(Some.getUpper()).sext(20)));
 188   EXPECT_EQ(SWrap, ConstantRange(APInt(Wrap.getLower()).sext(20),
 189                                  APInt(Wrap.getUpper()).sext(20)));
 190 }
 191
 192 TEST_F(ConstantRangeTest, IntersectWith) {
 193   EXPECT_TRUE(Empty.intersectWith(Full).isEmptySet());
 194   EXPECT_TRUE(Empty.intersectWith(Empty).isEmptySet());
 195   EXPECT_TRUE(Empty.intersectWith(One).isEmptySet());
 196   EXPECT_TRUE(Empty.intersectWith(Some).isEmptySet());
 197   EXPECT_TRUE(Empty.intersectWith(Wrap).isEmptySet());
 198   EXPECT_TRUE(Full.intersectWith(Full).isFullSet());
 199   EXPECT_TRUE(Some.intersectWith(Some) == Some);
 200   EXPECT_TRUE(Some.intersectWith(One) == One);
 201   EXPECT_TRUE(Full.intersectWith(One) == One);
 202   EXPECT_TRUE(Full.intersectWith(Some) == Some);
 203   EXPECT_TRUE(Some.intersectWith(Wrap).isEmptySet());
 204   EXPECT_TRUE(One.intersectWith(Wrap).isEmptySet());
 205   EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One));
 206
 207   // Klee generated testcase from PR4545.
 208   // The intersection of i16 [4, 2) and [6, 5) is disjoint, looking like
 209   // 01..4.6789ABCDEF where the dots represent values not in the intersection.
 210   ConstantRange LHS(APInt(16, 4), APInt(16, 2));
 211   ConstantRange RHS(APInt(16, 6), APInt(16, 5));
 212   EXPECT_EQ(LHS.intersectWith(RHS), LHS);
 213 }
 214
 215 TEST_F(ConstantRangeTest, UnionWith) {
 216   EXPECT_EQ(Wrap.unionWith(One),
 217             ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb)));
 218   EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One));
 219   EXPECT_TRUE(Empty.unionWith(Empty).isEmptySet());
 220   EXPECT_TRUE(Full.unionWith(Full).isFullSet());
 221   EXPECT_TRUE(Some.unionWith(Wrap).isFullSet());
 222
 223   // PR4545
 224   EXPECT_EQ(ConstantRange(APInt(16, 14), APInt(16, 1)).unionWith(
 225             ConstantRange(APInt(16, 0), APInt(16, 8))),
 226             ConstantRange(APInt(16, 14), APInt(16, 8)));
 227   EXPECT_EQ(ConstantRange(APInt(16, 6), APInt(16, 4)).unionWith(
 228             ConstantRange(APInt(16, 4), APInt(16, 0))),
 229             ConstantRange(16));
 230   EXPECT_EQ(ConstantRange(APInt(16, 1), APInt(16, 0)).unionWith(
 231             ConstantRange(APInt(16, 2), APInt(16, 1))),
 232             ConstantRange(16));
 233 }
 234
 235 TEST_F(ConstantRangeTest, SubtractAPInt) {
 236   EXPECT_TRUE(Full.subtract(APInt(16, 4)).isFullSet());
 237   EXPECT_TRUE(Empty.subtract(APInt(16, 4)).isEmptySet());
 238   EXPECT_EQ(Some.subtract(APInt(16, 4)),
 239             ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
 240   EXPECT_EQ(Wrap.subtract(APInt(16, 4)),
 241             ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
 242   EXPECT_EQ(One.subtract(APInt(16, 4)),
 243             ConstantRange(APInt(16, 0x6)));
 244 }
 245
 246 TEST_F(ConstantRangeTest, Add) {
 247   EXPECT_TRUE(Full.add(APInt(16, 4)).isFullSet());
 248   EXPECT_EQ(Full.add(Full), Full);
 249   EXPECT_EQ(Full.add(Empty), Empty);
 250   EXPECT_EQ(Full.add(One), Full);
 251   EXPECT_EQ(Full.add(Some), Full);
 252   EXPECT_EQ(Full.add(Wrap), Full);
 253   EXPECT_EQ(Empty.add(Empty), Empty);
 254   EXPECT_EQ(Empty.add(One), Empty);
 255   EXPECT_EQ(Empty.add(Some), Empty);
 256   EXPECT_EQ(Empty.add(Wrap), Empty);
 257   EXPECT_TRUE(Empty.add(APInt(16, 4)).isEmptySet());
 258   EXPECT_EQ(Some.add(APInt(16, 4)),
 259             ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
 260   EXPECT_EQ(Wrap.add(APInt(16, 4)),
 261             ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
 262   EXPECT_EQ(One.add(APInt(16, 4)),
 263             ConstantRange(APInt(16, 0xe)));
 264 }
 265
 266 TEST_F(ConstantRangeTest, Multiply) {
 267   EXPECT_EQ(Full.multiply(Full), Full);
 268   EXPECT_EQ(Full.multiply(Empty), Empty);
 269   EXPECT_EQ(Full.multiply(One), Full);
 270   EXPECT_EQ(Full.multiply(Some), Full);
 271   EXPECT_EQ(Full.multiply(Wrap), Full);
 272   EXPECT_EQ(Empty.multiply(Empty), Empty);
 273   EXPECT_EQ(Empty.multiply(One), Empty);
 274   EXPECT_EQ(Empty.multiply(Some), Empty);
 275   EXPECT_EQ(Empty.multiply(Wrap), Empty);
 276   EXPECT_EQ(One.multiply(One), ConstantRange(APInt(16, 0xa*0xa),
 277                                              APInt(16, 0xa*0xa + 1)));
 278   EXPECT_EQ(One.multiply(Some), ConstantRange(APInt(16, 0xa*0xa),
 279                                               APInt(16, 0xa*0xaa9 + 1)));
 280   EXPECT_TRUE(One.multiply(Wrap).isFullSet());
 281   EXPECT_TRUE(Some.multiply(Some).isFullSet());
 282   EXPECT_EQ(Some.multiply(Wrap), Full);
 283   EXPECT_EQ(Wrap.multiply(Wrap), Full);
 284
 285   // http://llvm.org/PR4545
 286   EXPECT_EQ(ConstantRange(APInt(4, 1), APInt(4, 6)).multiply(
 287               ConstantRange(APInt(4, 6), APInt(4, 2))),
 288             ConstantRange(4, /*isFullSet=*/true));
 289 }
 290
 291 TEST_F(ConstantRangeTest, UMax) {
 292   EXPECT_TRUE(Full.umax(Full).isFullSet());
 293   EXPECT_TRUE(Full.umax(Empty).isEmptySet());
 294   EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 295   EXPECT_TRUE(Full.umax(Wrap).isFullSet());
 296   EXPECT_EQ(Full.umax(Some), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 297   EXPECT_EQ(Empty.umax(Empty), Empty);
 298   EXPECT_EQ(Empty.umax(Some), Empty);
 299   EXPECT_EQ(Empty.umax(Wrap), Empty);
 300   EXPECT_EQ(Empty.umax(One), Empty);
 301   EXPECT_EQ(Some.umax(Some), Some);
 302   EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 303   EXPECT_EQ(Some.umax(One), Some);
 304   // TODO: ConstantRange is currently over-conservative here.
 305   EXPECT_EQ(Wrap.umax(Wrap), Full);
 306   EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 307   EXPECT_EQ(One.umax(One), One);
 308 }
 309
 310 TEST_F(ConstantRangeTest, SMax) {
 311   EXPECT_TRUE(Full.smax(Full).isFullSet());
 312   EXPECT_TRUE(Full.smax(Empty).isEmptySet());
 313   EXPECT_EQ(Full.smax(Some), ConstantRange(APInt(16, 0xa),
 314                              APInt::getSignedMinValue(16)));
 315   EXPECT_TRUE(Full.smax(Wrap).isFullSet());
 316   EXPECT_EQ(Full.smax(One), ConstantRange(APInt(16, 0xa),
 317                             APInt::getSignedMinValue(16)));
 318   EXPECT_EQ(Empty.smax(Empty), Empty);
 319   EXPECT_EQ(Empty.smax(Some), Empty);
 320   EXPECT_EQ(Empty.smax(Wrap), Empty);
 321   EXPECT_EQ(Empty.smax(One), Empty);
 322   EXPECT_EQ(Some.smax(Some), Some);
 323   EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa),
 324                                            APInt(16, (uint64_t)INT16_MIN)));
 325   EXPECT_EQ(Some.smax(One), Some);
 326   EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
 327                                           APInt(16, (uint64_t)INT16_MIN)));
 328   EXPECT_EQ(One.smax(One), One);
 329 }
 330
 331 TEST_F(ConstantRangeTest, UDiv) {
 332   EXPECT_EQ(Full.udiv(Full), Full);
 333   EXPECT_EQ(Full.udiv(Empty), Empty);
 334   EXPECT_EQ(Full.udiv(One), ConstantRange(APInt(16, 0),
 335                                           APInt(16, 0xffff / 0xa + 1)));
 336   EXPECT_EQ(Full.udiv(Some), ConstantRange(APInt(16, 0),
 337                                            APInt(16, 0xffff / 0xa + 1)));
 338   EXPECT_EQ(Full.udiv(Wrap), Full);
 339   EXPECT_EQ(Empty.udiv(Empty), Empty);
 340   EXPECT_EQ(Empty.udiv(One), Empty);
 341   EXPECT_EQ(Empty.udiv(Some), Empty);
 342   EXPECT_EQ(Empty.udiv(Wrap), Empty);
 343   EXPECT_EQ(One.udiv(One), ConstantRange(APInt(16, 1)));
 344   EXPECT_EQ(One.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 2)));
 345   EXPECT_EQ(One.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xb)));
 346   EXPECT_EQ(Some.udiv(Some), ConstantRange(APInt(16, 0), APInt(16, 0x111)));
 347   EXPECT_EQ(Some.udiv(Wrap), ConstantRange(APInt(16, 0), APInt(16, 0xaaa)));
 348   EXPECT_EQ(Wrap.udiv(Wrap), Full);
 349 }
 350
 351 }  // anonymous namespace