unittests/ADT/APIntTest.cpp

   1 //===- llvm/unittest/ADT/APInt.cpp - APInt unit 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 <ostream>
  11 #include "gtest/gtest.h"
  12 #include "llvm/ADT/APInt.h"
  13 #include "llvm/ADT/SmallString.h"
  14
  15 using namespace llvm;
  16
  17 namespace {
  18
  19 // Test that APInt shift left works when bitwidth > 64 and shiftamt == 0
  20 TEST(APIntTest, ShiftLeftByZero) {
  21   APInt One = APInt::getNullValue(65) + 1;
  22   APInt Shl = One.shl(0);
  23   EXPECT_TRUE(Shl[0]);
  24   EXPECT_FALSE(Shl[1]);
  25 }
  26
  27 TEST(APIntTest, i128_NegativeCount) {
  28   APInt Minus3(128, static_cast<uint64_t>(-3), true);
  29   EXPECT_EQ(126u, Minus3.countLeadingOnes());
  30   EXPECT_EQ(-3, Minus3.getSExtValue());
  31
  32   APInt Minus1(128, static_cast<uint64_t>(-1), true);
  33   EXPECT_EQ(0u, Minus1.countLeadingZeros());
  34   EXPECT_EQ(128u, Minus1.countLeadingOnes());
  35   EXPECT_EQ(128u, Minus1.getActiveBits());
  36   EXPECT_EQ(0u, Minus1.countTrailingZeros());
  37   EXPECT_EQ(128u, Minus1.countTrailingOnes());
  38   EXPECT_EQ(128u, Minus1.countPopulation());
  39   EXPECT_EQ(-1, Minus1.getSExtValue());
  40 }
  41
  42 // XFAIL this test on FreeBSD where the system gcc-4.2.1 seems to miscompile it.
  43 #if defined(__llvm__) || !defined(__FreeBSD__)
  44
  45 TEST(APIntTest, i33_Count) {
  46   APInt i33minus2(33, static_cast<uint64_t>(-2), true);
  47   EXPECT_EQ(0u, i33minus2.countLeadingZeros());
  48   EXPECT_EQ(32u, i33minus2.countLeadingOnes());
  49   EXPECT_EQ(33u, i33minus2.getActiveBits());
  50   EXPECT_EQ(1u, i33minus2.countTrailingZeros());
  51   EXPECT_EQ(32u, i33minus2.countPopulation());
  52   EXPECT_EQ(-2, i33minus2.getSExtValue());
  53   EXPECT_EQ(((uint64_t)-2)&((1ull<<33) -1), i33minus2.getZExtValue());
  54 }
  55
  56 #endif
  57
  58 TEST(APIntTest, i65_Count) {
  59   APInt i65minus(65, 0, true);
  60   i65minus.setBit(64);
  61   EXPECT_EQ(0u, i65minus.countLeadingZeros());
  62   EXPECT_EQ(1u, i65minus.countLeadingOnes());
  63   EXPECT_EQ(65u, i65minus.getActiveBits());
  64   EXPECT_EQ(64u, i65minus.countTrailingZeros());
  65   EXPECT_EQ(1u, i65minus.countPopulation());
  66 }
  67
  68 TEST(APIntTest, i128_PositiveCount) {
  69   APInt u128max = APInt::getAllOnesValue(128);
  70   EXPECT_EQ(128u, u128max.countLeadingOnes());
  71   EXPECT_EQ(0u, u128max.countLeadingZeros());
  72   EXPECT_EQ(128u, u128max.getActiveBits());
  73   EXPECT_EQ(0u, u128max.countTrailingZeros());
  74   EXPECT_EQ(128u, u128max.countTrailingOnes());
  75   EXPECT_EQ(128u, u128max.countPopulation());
  76
  77   APInt u64max(128, static_cast<uint64_t>(-1), false);
  78   EXPECT_EQ(64u, u64max.countLeadingZeros());
  79   EXPECT_EQ(0u, u64max.countLeadingOnes());
  80   EXPECT_EQ(64u, u64max.getActiveBits());
  81   EXPECT_EQ(0u, u64max.countTrailingZeros());
  82   EXPECT_EQ(64u, u64max.countTrailingOnes());
  83   EXPECT_EQ(64u, u64max.countPopulation());
  84   EXPECT_EQ((uint64_t)~0ull, u64max.getZExtValue());
  85
  86   APInt zero(128, 0, true);
  87   EXPECT_EQ(128u, zero.countLeadingZeros());
  88   EXPECT_EQ(0u, zero.countLeadingOnes());
  89   EXPECT_EQ(0u, zero.getActiveBits());
  90   EXPECT_EQ(128u, zero.countTrailingZeros());
  91   EXPECT_EQ(0u, zero.countTrailingOnes());
  92   EXPECT_EQ(0u, zero.countPopulation());
  93   EXPECT_EQ(0u, zero.getSExtValue());
  94   EXPECT_EQ(0u, zero.getZExtValue());
  95
  96   APInt one(128, 1, true);
  97   EXPECT_EQ(127u, one.countLeadingZeros());
  98   EXPECT_EQ(0u, one.countLeadingOnes());
  99   EXPECT_EQ(1u, one.getActiveBits());
 100   EXPECT_EQ(0u, one.countTrailingZeros());
 101   EXPECT_EQ(1u, one.countTrailingOnes());
 102   EXPECT_EQ(1u, one.countPopulation());
 103   EXPECT_EQ(1, one.getSExtValue());
 104   EXPECT_EQ(1u, one.getZExtValue());
 105 }
 106
 107 TEST(APIntTest, i1) {
 108   const APInt neg_two(1, static_cast<uint64_t>(-2), true);
 109   const APInt neg_one(1, static_cast<uint64_t>(-1), true);
 110   const APInt zero(1, 0);
 111   const APInt one(1, 1);
 112   const APInt two(1, 2);
 113
 114   EXPECT_EQ(0, neg_two.getSExtValue());
 115   EXPECT_EQ(-1, neg_one.getSExtValue());
 116   EXPECT_EQ(1u, neg_one.getZExtValue());
 117   EXPECT_EQ(0u, zero.getZExtValue());
 118   EXPECT_EQ(-1, one.getSExtValue());
 119   EXPECT_EQ(1u, one.getZExtValue());
 120   EXPECT_EQ(0u, two.getZExtValue());
 121   EXPECT_EQ(0, two.getSExtValue());
 122
 123   // Basic equalities for 1-bit values.
 124   EXPECT_EQ(zero, two);
 125   EXPECT_EQ(zero, neg_two);
 126   EXPECT_EQ(one, neg_one);
 127   EXPECT_EQ(two, neg_two);
 128
 129   // Additions.
 130   EXPECT_EQ(two, one + one);
 131   EXPECT_EQ(zero, neg_one + one);
 132   EXPECT_EQ(neg_two, neg_one + neg_one);
 133
 134   // Subtractions.
 135   EXPECT_EQ(neg_two, neg_one - one);
 136   EXPECT_EQ(two, one - neg_one);
 137   EXPECT_EQ(zero, one - one);
 138
 139   // Shifts.
 140   EXPECT_EQ(zero, one << one);
 141   EXPECT_EQ(one, one << zero);
 142   EXPECT_EQ(zero, one.shl(1));
 143   EXPECT_EQ(one, one.shl(0));
 144   EXPECT_EQ(zero, one.lshr(1));
 145   EXPECT_EQ(zero, one.ashr(1));
 146
 147   // Rotates.
 148   EXPECT_EQ(one, one.rotl(0));
 149   EXPECT_EQ(one, one.rotl(1));
 150   EXPECT_EQ(one, one.rotr(0));
 151   EXPECT_EQ(one, one.rotr(1));
 152
 153   // Multiplies.
 154   EXPECT_EQ(neg_one, neg_one * one);
 155   EXPECT_EQ(neg_one, one * neg_one);
 156   EXPECT_EQ(one, neg_one * neg_one);
 157   EXPECT_EQ(one, one * one);
 158
 159   // Divides.
 160   EXPECT_EQ(neg_one, one.sdiv(neg_one));
 161   EXPECT_EQ(neg_one, neg_one.sdiv(one));
 162   EXPECT_EQ(one, neg_one.sdiv(neg_one));
 163   EXPECT_EQ(one, one.sdiv(one));
 164
 165   EXPECT_EQ(neg_one, one.udiv(neg_one));
 166   EXPECT_EQ(neg_one, neg_one.udiv(one));
 167   EXPECT_EQ(one, neg_one.udiv(neg_one));
 168   EXPECT_EQ(one, one.udiv(one));
 169
 170   // Remainders.
 171   EXPECT_EQ(zero, neg_one.srem(one));
 172   EXPECT_EQ(zero, neg_one.urem(one));
 173   EXPECT_EQ(zero, one.srem(neg_one));
 174 }
 175
 176 TEST(APIntTest, fromString) {
 177   EXPECT_EQ(APInt(32, 0), APInt(32,   "0", 2));
 178   EXPECT_EQ(APInt(32, 1), APInt(32,   "1", 2));
 179   EXPECT_EQ(APInt(32, 2), APInt(32,  "10", 2));
 180   EXPECT_EQ(APInt(32, 3), APInt(32,  "11", 2));
 181   EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2));
 182
 183   EXPECT_EQ(APInt(32, 0), APInt(32,   "+0", 2));
 184   EXPECT_EQ(APInt(32, 1), APInt(32,   "+1", 2));
 185   EXPECT_EQ(APInt(32, 2), APInt(32,  "+10", 2));
 186   EXPECT_EQ(APInt(32, 3), APInt(32,  "+11", 2));
 187   EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2));
 188
 189   EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32,   "-0", 2));
 190   EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32,   "-1", 2));
 191   EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32,  "-10", 2));
 192   EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32,  "-11", 2));
 193   EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2));
 194
 195
 196   EXPECT_EQ(APInt(32,  0), APInt(32,  "0",  8));
 197   EXPECT_EQ(APInt(32,  1), APInt(32,  "1",  8));
 198   EXPECT_EQ(APInt(32,  7), APInt(32,  "7",  8));
 199   EXPECT_EQ(APInt(32,  8), APInt(32,  "10", 8));
 200   EXPECT_EQ(APInt(32, 15), APInt(32,  "17", 8));
 201   EXPECT_EQ(APInt(32, 16), APInt(32,  "20", 8));
 202
 203   EXPECT_EQ(APInt(32,  +0), APInt(32,  "+0",  8));
 204   EXPECT_EQ(APInt(32,  +1), APInt(32,  "+1",  8));
 205   EXPECT_EQ(APInt(32,  +7), APInt(32,  "+7",  8));
 206   EXPECT_EQ(APInt(32,  +8), APInt(32,  "+10", 8));
 207   EXPECT_EQ(APInt(32, +15), APInt(32,  "+17", 8));
 208   EXPECT_EQ(APInt(32, +16), APInt(32,  "+20", 8));
 209
 210   EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0",  8));
 211   EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1",  8));
 212   EXPECT_EQ(APInt(32,  uint64_t(-7LL)), APInt(32,  "-7",  8));
 213   EXPECT_EQ(APInt(32,  uint64_t(-8LL)), APInt(32,  "-10", 8));
 214   EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32,  "-17", 8));
 215   EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32,  "-20", 8));
 216
 217
 218   EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 10));
 219   EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 10));
 220   EXPECT_EQ(APInt(32,  9), APInt(32,  "9", 10));
 221   EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10));
 222   EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10));
 223   EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10));
 224
 225   EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 10));
 226   EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 10));
 227   EXPECT_EQ(APInt(32,  uint64_t(-9LL)), APInt(32,  "-9", 10));
 228   EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10));
 229   EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10));
 230   EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10));
 231
 232
 233   EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 16));
 234   EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 16));
 235   EXPECT_EQ(APInt(32, 15), APInt(32,  "F", 16));
 236   EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16));
 237   EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16));
 238   EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16));
 239
 240   EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 16));
 241   EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 16));
 242   EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32,  "-F", 16));
 243   EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16));
 244   EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16));
 245   EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16));
 246
 247   EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 36));
 248   EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 36));
 249   EXPECT_EQ(APInt(32, 35), APInt(32,  "Z", 36));
 250   EXPECT_EQ(APInt(32, 36), APInt(32, "10", 36));
 251   EXPECT_EQ(APInt(32, 71), APInt(32, "1Z", 36));
 252   EXPECT_EQ(APInt(32, 72), APInt(32, "20", 36));
 253
 254   EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 36));
 255   EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 36));
 256   EXPECT_EQ(APInt(32, uint64_t(-35LL)), APInt(32,  "-Z", 36));
 257   EXPECT_EQ(APInt(32, uint64_t(-36LL)), APInt(32, "-10", 36));
 258   EXPECT_EQ(APInt(32, uint64_t(-71LL)), APInt(32, "-1Z", 36));
 259   EXPECT_EQ(APInt(32, uint64_t(-72LL)), APInt(32, "-20", 36));
 260 }
 261
 262 TEST(APIntTest, FromArray) {
 263   EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1)));
 264 }
 265
 266 TEST(APIntTest, StringBitsNeeded2) {
 267   EXPECT_EQ(1U, APInt::getBitsNeeded(  "0", 2));
 268   EXPECT_EQ(1U, APInt::getBitsNeeded(  "1", 2));
 269   EXPECT_EQ(2U, APInt::getBitsNeeded( "10", 2));
 270   EXPECT_EQ(2U, APInt::getBitsNeeded( "11", 2));
 271   EXPECT_EQ(3U, APInt::getBitsNeeded("100", 2));
 272
 273   EXPECT_EQ(1U, APInt::getBitsNeeded(  "+0", 2));
 274   EXPECT_EQ(1U, APInt::getBitsNeeded(  "+1", 2));
 275   EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2));
 276   EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2));
 277   EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2));
 278
 279   EXPECT_EQ(2U, APInt::getBitsNeeded(  "-0", 2));
 280   EXPECT_EQ(2U, APInt::getBitsNeeded(  "-1", 2));
 281   EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2));
 282   EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2));
 283   EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2));
 284 }
 285
 286 TEST(APIntTest, StringBitsNeeded8) {
 287   EXPECT_EQ(3U, APInt::getBitsNeeded( "0", 8));
 288   EXPECT_EQ(3U, APInt::getBitsNeeded( "7", 8));
 289   EXPECT_EQ(6U, APInt::getBitsNeeded("10", 8));
 290   EXPECT_EQ(6U, APInt::getBitsNeeded("17", 8));
 291   EXPECT_EQ(6U, APInt::getBitsNeeded("20", 8));
 292
 293   EXPECT_EQ(3U, APInt::getBitsNeeded( "+0", 8));
 294   EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8));
 295   EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8));
 296   EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8));
 297   EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8));
 298
 299   EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8));
 300   EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8));
 301   EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8));
 302   EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8));
 303   EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8));
 304 }
 305
 306 TEST(APIntTest, StringBitsNeeded10) {
 307   EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10));
 308   EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 10));
 309   EXPECT_EQ(4U, APInt::getBitsNeeded( "9", 10));
 310   EXPECT_EQ(4U, APInt::getBitsNeeded("10", 10));
 311   EXPECT_EQ(5U, APInt::getBitsNeeded("19", 10));
 312   EXPECT_EQ(5U, APInt::getBitsNeeded("20", 10));
 313
 314   EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 10));
 315   EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10));
 316   EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10));
 317   EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10));
 318   EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10));
 319
 320   EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10));
 321   EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10));
 322   EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10));
 323   EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10));
 324   EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10));
 325 }
 326
 327 TEST(APIntTest, StringBitsNeeded16) {
 328   EXPECT_EQ(4U, APInt::getBitsNeeded( "0", 16));
 329   EXPECT_EQ(4U, APInt::getBitsNeeded( "F", 16));
 330   EXPECT_EQ(8U, APInt::getBitsNeeded("10", 16));
 331   EXPECT_EQ(8U, APInt::getBitsNeeded("1F", 16));
 332   EXPECT_EQ(8U, APInt::getBitsNeeded("20", 16));
 333
 334   EXPECT_EQ(4U, APInt::getBitsNeeded( "+0", 16));
 335   EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16));
 336   EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16));
 337   EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16));
 338   EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16));
 339
 340   EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16));
 341   EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16));
 342   EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16));
 343   EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16));
 344   EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16));
 345 }
 346
 347 TEST(APIntTest, toString) {
 348   SmallString<16> S;
 349   bool isSigned;
 350
 351   APInt(8, 0).toString(S, 2, true, true);
 352   EXPECT_EQ(S.str().str(), "0b0");
 353   S.clear();
 354   APInt(8, 0).toString(S, 8, true, true);
 355   EXPECT_EQ(S.str().str(), "00");
 356   S.clear();
 357   APInt(8, 0).toString(S, 10, true, true);
 358   EXPECT_EQ(S.str().str(), "0");
 359   S.clear();
 360   APInt(8, 0).toString(S, 16, true, true);
 361   EXPECT_EQ(S.str().str(), "0x0");
 362   S.clear();
 363   APInt(8, 0).toString(S, 36, true, false);
 364   EXPECT_EQ(S.str().str(), "0");
 365   S.clear();
 366
 367   isSigned = false;
 368   APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
 369   EXPECT_EQ(S.str().str(), "0b11111111");
 370   S.clear();
 371   APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
 372   EXPECT_EQ(S.str().str(), "0377");
 373   S.clear();
 374   APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
 375   EXPECT_EQ(S.str().str(), "255");
 376   S.clear();
 377   APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
 378   EXPECT_EQ(S.str().str(), "0xFF");
 379   S.clear();
 380   APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
 381   EXPECT_EQ(S.str().str(), "73");
 382   S.clear();
 383
 384   isSigned = true;
 385   APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
 386   EXPECT_EQ(S.str().str(), "-0b1");
 387   S.clear();
 388   APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
 389   EXPECT_EQ(S.str().str(), "-01");
 390   S.clear();
 391   APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
 392   EXPECT_EQ(S.str().str(), "-1");
 393   S.clear();
 394   APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
 395   EXPECT_EQ(S.str().str(), "-0x1");
 396   S.clear();
 397   APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
 398   EXPECT_EQ(S.str().str(), "-1");
 399   S.clear();
 400 }
 401
 402 TEST(APIntTest, Log2) {
 403   EXPECT_EQ(APInt(15, 7).logBase2(), 2U);
 404   EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U);
 405   EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1);
 406   EXPECT_EQ(APInt(15, 8).logBase2(), 3U);
 407   EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U);
 408   EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3);
 409   EXPECT_EQ(APInt(15, 9).logBase2(), 3U);
 410   EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U);
 411   EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1);
 412 }
 413
 414 TEST(APIntTest, magic) {
 415   EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16));
 416   EXPECT_EQ(APInt(32, 3).magic().s, 0U);
 417   EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16));
 418   EXPECT_EQ(APInt(32, 5).magic().s, 1U);
 419   EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16));
 420   EXPECT_EQ(APInt(32, 7).magic().s, 2U);
 421 }
 422
 423 TEST(APIntTest, magicu) {
 424   EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16));
 425   EXPECT_EQ(APInt(32, 3).magicu().s, 1U);
 426   EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16));
 427   EXPECT_EQ(APInt(32, 5).magicu().s, 2U);
 428   EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16));
 429   EXPECT_EQ(APInt(32, 7).magicu().s, 3U);
 430   EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16));
 431   EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U);
 432 }
 433
 434 #ifdef GTEST_HAS_DEATH_TEST
 435 #ifndef NDEBUG
 436 TEST(APIntTest, StringDeath) {
 437   EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small");
 438   EXPECT_DEATH(APInt(32, "", 0), "Invalid string length");
 439   EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, 16, or 36!");
 440   EXPECT_DEATH(APInt(32, "", 10), "Invalid string length");
 441   EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value.");
 442   EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width");
 443   EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length");
 444   EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string");
 445   EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string");
 446 }
 447 #endif
 448 #endif
 449
 450 TEST(APIntTest, mul_clear) {
 451   APInt ValA(65, -1ULL);
 452   APInt ValB(65, 4);
 453   APInt ValC(65, 0);
 454   ValC = ValA * ValB;
 455   ValA *= ValB;
 456   EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false));
 457 }
 458
 459 TEST(APIntTest, Rotate) {
 460   EXPECT_EQ(APInt(8, 1),  APInt(8, 1).rotl(0));
 461   EXPECT_EQ(APInt(8, 2),  APInt(8, 1).rotl(1));
 462   EXPECT_EQ(APInt(8, 4),  APInt(8, 1).rotl(2));
 463   EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotl(4));
 464   EXPECT_EQ(APInt(8, 1),  APInt(8, 1).rotl(8));
 465
 466   EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(0));
 467   EXPECT_EQ(APInt(8, 32), APInt(8, 16).rotl(1));
 468   EXPECT_EQ(APInt(8, 64), APInt(8, 16).rotl(2));
 469   EXPECT_EQ(APInt(8, 1),  APInt(8, 16).rotl(4));
 470   EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(8));
 471
 472   EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(0));
 473   EXPECT_EQ(APInt(8, 8),  APInt(8, 16).rotr(1));
 474   EXPECT_EQ(APInt(8, 4),  APInt(8, 16).rotr(2));
 475   EXPECT_EQ(APInt(8, 1),  APInt(8, 16).rotr(4));
 476   EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(8));
 477
 478   EXPECT_EQ(APInt(8, 1),   APInt(8, 1).rotr(0));
 479   EXPECT_EQ(APInt(8, 128), APInt(8, 1).rotr(1));
 480   EXPECT_EQ(APInt(8, 64),  APInt(8, 1).rotr(2));
 481   EXPECT_EQ(APInt(8, 16),  APInt(8, 1).rotr(4));
 482   EXPECT_EQ(APInt(8, 1),   APInt(8, 1).rotr(8));
 483
 484   APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16);
 485   APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16);
 486   EXPECT_EQ(Rot, Big.rotr(144));
 487 }
 488
 489 }