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 TEST(ConstantRangeTest, Unsigned) {
  19   ConstantRange Full(16);
  20   ConstantRange Empty(16, false);
  21   ConstantRange One(APInt(16, 0xa));
  22   ConstantRange Some(APInt(16, 0xa), APInt(16, 0xaaa));
  23   ConstantRange Wrap(APInt(16, 0xaaa), APInt(16, 0xa));
  24
  25   EXPECT_TRUE(Full.isFullSet());
  26   EXPECT_FALSE(Full.isEmptySet());
  27   EXPECT_FALSE(Full.isWrappedSet());
  28   EXPECT_TRUE(Full.contains(APInt(16, 0x0)));
  29   EXPECT_TRUE(Full.contains(APInt(16, 0x9)));
  30   EXPECT_TRUE(Full.contains(APInt(16, 0xa)));
  31   EXPECT_TRUE(Full.contains(APInt(16, 0xaa9)));
  32   EXPECT_TRUE(Full.contains(APInt(16, 0xaaa)));
  33
  34   EXPECT_FALSE(Empty.isFullSet());
  35   EXPECT_TRUE(Empty.isEmptySet());
  36   EXPECT_FALSE(Empty.isWrappedSet());
  37   EXPECT_FALSE(Empty.contains(APInt(16, 0x0)));
  38   EXPECT_FALSE(Empty.contains(APInt(16, 0x9)));
  39   EXPECT_FALSE(Empty.contains(APInt(16, 0xa)));
  40   EXPECT_FALSE(Empty.contains(APInt(16, 0xaa9)));
  41   EXPECT_FALSE(Empty.contains(APInt(16, 0xaaa)));
  42
  43   EXPECT_FALSE(One.isFullSet());
  44   EXPECT_FALSE(One.isEmptySet());
  45   EXPECT_FALSE(One.isWrappedSet());
  46   EXPECT_FALSE(One.contains(APInt(16, 0x0)));
  47   EXPECT_FALSE(One.contains(APInt(16, 0x9)));
  48   EXPECT_TRUE(One.contains(APInt(16, 0xa)));
  49   EXPECT_FALSE(One.contains(APInt(16, 0xaa9)));
  50   EXPECT_FALSE(One.contains(APInt(16, 0xaaa)));
  51
  52   EXPECT_FALSE(Some.isFullSet());
  53   EXPECT_FALSE(Some.isEmptySet());
  54   EXPECT_FALSE(Some.isWrappedSet());
  55   EXPECT_FALSE(Some.contains(APInt(16, 0x0)));
  56   EXPECT_FALSE(Some.contains(APInt(16, 0x9)));
  57   EXPECT_TRUE(Some.contains(APInt(16, 0xa)));
  58   EXPECT_TRUE(Some.contains(APInt(16, 0xaa9)));
  59   EXPECT_FALSE(Some.contains(APInt(16, 0xaaa)));
  60
  61   EXPECT_FALSE(Wrap.isFullSet());
  62   EXPECT_FALSE(Wrap.isEmptySet());
  63   EXPECT_TRUE(Wrap.isWrappedSet());
  64   EXPECT_TRUE(Wrap.contains(APInt(16, 0x0)));
  65   EXPECT_TRUE(Wrap.contains(APInt(16, 0x9)));
  66   EXPECT_FALSE(Wrap.contains(APInt(16, 0xa)));
  67   EXPECT_FALSE(Wrap.contains(APInt(16, 0xaa9)));
  68   EXPECT_TRUE(Wrap.contains(APInt(16, 0xaaa)));
  69
  70   EXPECT_EQ(Full, Full);
  71   EXPECT_EQ(Empty, Empty);
  72   EXPECT_EQ(One, One);
  73   EXPECT_EQ(Some, Some);
  74   EXPECT_EQ(Wrap, Wrap);
  75   EXPECT_NE(Full, Empty);
  76   EXPECT_NE(Full, One);
  77   EXPECT_NE(Full, Some);
  78   EXPECT_NE(Full, Wrap);
  79   EXPECT_NE(Empty, One);
  80   EXPECT_NE(Empty, Some);
  81   EXPECT_NE(Empty, Wrap);
  82   EXPECT_NE(One, Some);
  83   EXPECT_NE(One, Wrap);
  84   EXPECT_NE(Some, Wrap);
  85
  86   EXPECT_EQ(Full.getSingleElement(), static_cast<APInt *>(NULL));
  87   EXPECT_EQ(Empty.getSingleElement(), static_cast<APInt *>(NULL));
  88   EXPECT_EQ(*One.getSingleElement(), APInt(16, 0xa));
  89   EXPECT_EQ(Some.getSingleElement(), static_cast<APInt *>(NULL));
  90   EXPECT_EQ(Wrap.getSingleElement(), static_cast<APInt *>(NULL));
  91
  92   EXPECT_FALSE(Full.isSingleElement());
  93   EXPECT_FALSE(Empty.isSingleElement());
  94   EXPECT_TRUE(One.isSingleElement());
  95   EXPECT_FALSE(Some.isSingleElement());
  96   EXPECT_FALSE(Wrap.isSingleElement());
  97
  98   EXPECT_EQ(Full.getSetSize(), APInt(16, 0));
  99   EXPECT_EQ(Empty.getSetSize(), APInt(16, 0));
 100   EXPECT_EQ(One.getSetSize(), APInt(16, 1));
 101   EXPECT_EQ(Some.getSetSize(), APInt(16, 0xaa0));
 102   EXPECT_EQ(Wrap.getSetSize(), APInt(16, 0x10000 - 0xaa0));
 103
 104   EXPECT_EQ(Full.getUnsignedMax(), APInt(16, UINT16_MAX));
 105   EXPECT_EQ(One.getUnsignedMax(), APInt(16, 0xa));
 106   EXPECT_EQ(Some.getUnsignedMax(), APInt(16, 0xaa9));
 107   EXPECT_EQ(Wrap.getUnsignedMax(), APInt(16, UINT16_MAX));
 108
 109   EXPECT_EQ(Full.getUnsignedMin(), APInt(16, 0));
 110   EXPECT_EQ(One.getUnsignedMin(), APInt(16, 0xa));
 111   EXPECT_EQ(Some.getUnsignedMin(), APInt(16, 0xa));
 112   EXPECT_EQ(Wrap.getUnsignedMin(), APInt(16, 0));
 113
 114   EXPECT_EQ(Full.getSignedMax(), APInt(16, INT16_MAX));
 115   EXPECT_EQ(One.getSignedMax(), APInt(16, 0xa));
 116   EXPECT_EQ(Some.getSignedMax(), APInt(16, 0xaa9));
 117   EXPECT_EQ(Wrap.getSignedMax(), APInt(16, INT16_MAX));
 118
 119   EXPECT_EQ(Full.getSignedMin(), APInt(16, INT16_MIN));
 120   EXPECT_EQ(One.getSignedMin(), APInt(16, 0xa));
 121   EXPECT_EQ(Some.getSignedMin(), APInt(16, 0xa));
 122   EXPECT_EQ(Wrap.getSignedMin(), APInt(16, INT16_MIN));
 123
 124   ConstantRange TFull = Full.truncate(10);
 125   ConstantRange TEmpty = Empty.truncate(10);
 126   ConstantRange TOne = One.truncate(10);
 127   ConstantRange TSome = Some.truncate(10);
 128   ConstantRange TWrap = Wrap.truncate(10);
 129   EXPECT_TRUE(TFull.isFullSet());
 130   EXPECT_TRUE(TEmpty.isEmptySet());
 131   EXPECT_EQ(TOne, ConstantRange(APInt(One.getLower()).trunc(10),
 132                                 APInt(One.getUpper()).trunc(10)));
 133   // TODO: ConstantRange is currently over-conservative here.
 134   EXPECT_TRUE(TSome.isFullSet());
 135
 136   ConstantRange ZFull = Full.zeroExtend(20);
 137   ConstantRange ZEmpty = Empty.zeroExtend(20);
 138   ConstantRange ZOne = One.zeroExtend(20);
 139   ConstantRange ZSome = Some.zeroExtend(20);
 140   ConstantRange ZWrap = Wrap.zeroExtend(20);
 141   EXPECT_EQ(ZFull, ConstantRange(APInt(20, 0), APInt(20, 0x10000)));
 142   EXPECT_TRUE(ZEmpty.isEmptySet());
 143   EXPECT_EQ(ZOne, ConstantRange(APInt(One.getLower()).zext(20),
 144                                 APInt(One.getUpper()).zext(20)));
 145   EXPECT_EQ(ZSome, ConstantRange(APInt(Some.getLower()).zext(20),
 146                                  APInt(Some.getUpper()).zext(20)));
 147   EXPECT_EQ(ZWrap, ConstantRange(APInt(Wrap.getLower()).zext(20),
 148                                  APInt(Wrap.getUpper()).zext(20)));
 149
 150   ConstantRange SFull = Full.signExtend(20);
 151   ConstantRange SEmpty = Empty.signExtend(20);
 152   ConstantRange SOne = One.signExtend(20);
 153   ConstantRange SSome = Some.signExtend(20);
 154   ConstantRange SWrap = Wrap.signExtend(20);
 155   EXPECT_EQ(SFull, ConstantRange(APInt(20, INT16_MIN, true),
 156                                  APInt(20, INT16_MAX, true)));
 157   EXPECT_TRUE(SEmpty.isEmptySet());
 158   EXPECT_EQ(SOne, ConstantRange(APInt(One.getLower()).sext(20),
 159                                 APInt(One.getUpper()).sext(20)));
 160   EXPECT_EQ(SSome, ConstantRange(APInt(Some.getLower()).sext(20),
 161                                  APInt(Some.getUpper()).sext(20)));
 162   EXPECT_EQ(SWrap, ConstantRange(APInt(Wrap.getLower()).sext(20),
 163                                  APInt(Wrap.getUpper()).sext(20)));
 164
 165   EXPECT_TRUE(Empty.intersectWith(Full).isEmptySet());
 166   EXPECT_TRUE(Empty.intersectWith(Empty).isEmptySet());
 167   EXPECT_TRUE(Empty.intersectWith(One).isEmptySet());
 168   EXPECT_TRUE(Empty.intersectWith(Some).isEmptySet());
 169   EXPECT_TRUE(Empty.intersectWith(Wrap).isEmptySet());
 170   EXPECT_TRUE(Full.intersectWith(Full).isFullSet());
 171   EXPECT_TRUE(Some.intersectWith(Some) == Some);
 172   EXPECT_TRUE(Some.intersectWith(One) == One);
 173   EXPECT_TRUE(Full.intersectWith(One) == One);
 174   EXPECT_TRUE(Full.intersectWith(Some) == Some);
 175   EXPECT_TRUE(Some.intersectWith(Wrap).isEmptySet());
 176   EXPECT_TRUE(One.intersectWith(Wrap).isEmptySet());
 177   EXPECT_EQ(One.intersectWith(Wrap), Wrap.intersectWith(One));
 178
 179   EXPECT_TRUE(Empty.maximalIntersectWith(Full).isEmptySet());
 180   EXPECT_TRUE(Empty.maximalIntersectWith(Empty).isEmptySet());
 181   EXPECT_TRUE(Empty.maximalIntersectWith(One).isEmptySet());
 182   EXPECT_TRUE(Empty.maximalIntersectWith(Some).isEmptySet());
 183   EXPECT_TRUE(Empty.maximalIntersectWith(Wrap).isEmptySet());
 184   EXPECT_TRUE(Full.maximalIntersectWith(Full).isFullSet());
 185   EXPECT_TRUE(Some.maximalIntersectWith(Some) == Some);
 186   EXPECT_TRUE(Some.maximalIntersectWith(One) == One);
 187   EXPECT_TRUE(Full.maximalIntersectWith(One) == One);
 188   EXPECT_TRUE(Full.maximalIntersectWith(Some) == Some);
 189   EXPECT_TRUE(Some.maximalIntersectWith(Wrap).isEmptySet());
 190   EXPECT_TRUE(One.maximalIntersectWith(Wrap).isEmptySet());
 191   EXPECT_EQ(One.maximalIntersectWith(Wrap), Wrap.maximalIntersectWith(One));
 192
 193   EXPECT_EQ(Wrap.unionWith(One),
 194             ConstantRange(APInt(16, 0xaaa), APInt(16, 0xb)));
 195   EXPECT_EQ(One.unionWith(Wrap), Wrap.unionWith(One));
 196   EXPECT_TRUE(Empty.unionWith(Empty).isEmptySet());
 197   EXPECT_TRUE(Full.unionWith(Full).isFullSet());
 198   EXPECT_TRUE(Some.unionWith(Wrap).isFullSet());
 199
 200   EXPECT_TRUE(Full.subtract(APInt(16, 4)).isFullSet());
 201   EXPECT_TRUE(Empty.subtract(APInt(16, 4)).isEmptySet());
 202   EXPECT_EQ(Some.subtract(APInt(16, 4)),
 203             ConstantRange(APInt(16, 0x6), APInt(16, 0xaa6)));
 204   EXPECT_EQ(Wrap.subtract(APInt(16, 4)),
 205             ConstantRange(APInt(16, 0xaa6), APInt(16, 0x6)));
 206   EXPECT_EQ(One.subtract(APInt(16, 4)),
 207             ConstantRange(APInt(16, 0x6)));
 208
 209   EXPECT_TRUE(Full.add(APInt(16, 4)).isFullSet());
 210   EXPECT_EQ(Full.add(Empty), Empty);
 211   EXPECT_EQ(Full.add(One), Full);
 212   EXPECT_EQ(Full.add(Some), Full);
 213   EXPECT_EQ(Full.add(Wrap), Full);
 214   EXPECT_EQ(Empty.add(Empty), Empty);
 215   EXPECT_EQ(Empty.add(One), Empty);
 216   EXPECT_EQ(Empty.add(Some), Empty);
 217   EXPECT_EQ(Empty.add(Wrap), Empty);
 218   EXPECT_TRUE(Empty.add(APInt(16, 4)).isEmptySet());
 219   EXPECT_EQ(Some.add(APInt(16, 4)),
 220             ConstantRange(APInt(16, 0xe), APInt(16, 0xaae)));
 221   EXPECT_EQ(Wrap.add(APInt(16, 4)),
 222             ConstantRange(APInt(16, 0xaae), APInt(16, 0xe)));
 223   EXPECT_EQ(One.add(APInt(16, 4)),
 224             ConstantRange(APInt(16, 0xe)));
 225
 226   EXPECT_TRUE(Full.umax(Full).isFullSet());
 227   EXPECT_TRUE(Full.umax(Empty).isEmptySet());
 228   EXPECT_TRUE(Full.umax(Some).isFullSet());
 229   EXPECT_TRUE(Full.umax(Wrap).isFullSet());
 230   EXPECT_TRUE(Full.umax(One).isFullSet());
 231   EXPECT_EQ(Empty.umax(Empty), Empty);
 232   EXPECT_EQ(Empty.umax(Some), Empty);
 233   EXPECT_EQ(Empty.umax(Wrap), Empty);
 234   EXPECT_EQ(Empty.umax(One), Empty);
 235   EXPECT_EQ(Some.umax(Some), Some);
 236   EXPECT_EQ(Some.umax(Wrap), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 237   EXPECT_EQ(Some.umax(One), Some);
 238   // TODO: ConstantRange is currently over-conservative here.
 239   EXPECT_EQ(Wrap.umax(Wrap), Full);
 240   EXPECT_EQ(Wrap.umax(One), ConstantRange(APInt(16, 0xa), APInt(16, 0)));
 241   EXPECT_EQ(One.umax(One), One);
 242
 243   EXPECT_EQ(Full.multiply(Full), Full);
 244   EXPECT_EQ(Full.multiply(Empty), Empty);
 245   EXPECT_EQ(Full.multiply(One), Full);
 246   EXPECT_EQ(Full.multiply(Some), Full);
 247   EXPECT_EQ(Full.multiply(Wrap), Full);
 248   EXPECT_EQ(Empty.multiply(Empty), Empty);
 249   EXPECT_EQ(Empty.multiply(One), Empty);
 250   EXPECT_EQ(Empty.multiply(Some), Empty);
 251   EXPECT_EQ(Empty.multiply(Wrap), Empty);
 252   // TODO: ConstantRange is currently over-conservative here.
 253   EXPECT_EQ(One.multiply(One), Full);
 254   // TODO: ConstantRange is currently over-conservative here.
 255   EXPECT_EQ(One.multiply(Some), Full);
 256   // TODO: ConstantRange is currently over-conservative here.
 257   EXPECT_EQ(One.multiply(Wrap), Full);
 258   // TODO: ConstantRange is currently over-conservative here.
 259   EXPECT_EQ(Some.multiply(Some), Full);
 260   // TODO: ConstantRange is currently over-conservative here.
 261   EXPECT_EQ(Some.multiply(Wrap), Full);
 262   // TODO: ConstantRange is currently over-conservative here.
 263   EXPECT_EQ(Wrap.multiply(Wrap), Full);
 264
 265   EXPECT_TRUE(Full.smax(Full).isFullSet());
 266   EXPECT_TRUE(Full.smax(Empty).isEmptySet());
 267   EXPECT_TRUE(Full.smax(Some).isFullSet());
 268   EXPECT_TRUE(Full.smax(Wrap).isFullSet());
 269   EXPECT_TRUE(Full.smax(One).isFullSet());
 270   EXPECT_EQ(Empty.smax(Empty), Empty);
 271   EXPECT_EQ(Empty.smax(Some), Empty);
 272   EXPECT_EQ(Empty.smax(Wrap), Empty);
 273   EXPECT_EQ(Empty.smax(One), Empty);
 274   EXPECT_EQ(Some.smax(Some), Some);
 275   EXPECT_EQ(Some.smax(Wrap), ConstantRange(APInt(16, 0xa),
 276                                                  APInt(16, INT16_MIN)));
 277   EXPECT_EQ(Some.smax(One), Some);
 278   EXPECT_EQ(Wrap.smax(One), ConstantRange(APInt(16, 0xa),
 279                                                 APInt(16, INT16_MIN)));
 280   EXPECT_EQ(One.smax(One), One);
 281
 282   EXPECT_EQ(Full.udiv(Full), Full);
 283   EXPECT_EQ(Full.udiv(Empty), Empty);
 284   EXPECT_EQ(Full.udiv(One), Full);
 285   EXPECT_EQ(Full.udiv(Some), Full);
 286   EXPECT_EQ(Full.udiv(Wrap), Full);
 287   EXPECT_EQ(Empty.udiv(Empty), Empty);
 288   EXPECT_EQ(Empty.udiv(One), Empty);
 289   EXPECT_EQ(Empty.udiv(Some), Empty);
 290   EXPECT_EQ(Empty.udiv(Wrap), Empty);
 291   // TODO: ConstantRange is currently over-conservative here.
 292   EXPECT_EQ(One.udiv(One), Full);
 293   // TODO: ConstantRange is currently over-conservative here.
 294   EXPECT_EQ(One.udiv(Some), Full);
 295   // TODO: ConstantRange is currently over-conservative here.
 296   EXPECT_EQ(One.udiv(Wrap), Full);
 297   // TODO: ConstantRange is currently over-conservative here.
 298   EXPECT_EQ(Some.udiv(Some), Full);
 299   // TODO: ConstantRange is currently over-conservative here.
 300   EXPECT_EQ(Some.udiv(Wrap), Full);
 301   // TODO: ConstantRange is currently over-conservative here.
 302   EXPECT_EQ(Wrap.udiv(Wrap), Full);
 303 }
 304
 305 }  // anonymous namespace