unittests/ADT/APIntTest.cpp - platform/external/llvm - Git at Google

 //===- llvm/unittest/ADT/APInt.cpp - APInt unit tests ---------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/SmallString.h"
 #include "gtest/gtest.h"
 #include <ostream>

 using namespace llvm;

 namespace {

 // Test that APInt shift left works when bitwidth > 64 and shiftamt == 0
 TEST(APIntTest, ShiftLeftByZero) {
   APInt One = APInt::getNullValue(65) + 1;
   APInt Shl = One.shl(0);
   EXPECT_TRUE(Shl[0]);
   EXPECT_FALSE(Shl[1]);
 }

 TEST(APIntTest, i128_NegativeCount) {
   APInt Minus3(128, static_cast<uint64_t>(-3), true);
   EXPECT_EQ(126u, Minus3.countLeadingOnes());
   EXPECT_EQ(-3, Minus3.getSExtValue());

   APInt Minus1(128, static_cast<uint64_t>(-1), true);
   EXPECT_EQ(0u, Minus1.countLeadingZeros());
   EXPECT_EQ(128u, Minus1.countLeadingOnes());
   EXPECT_EQ(128u, Minus1.getActiveBits());
   EXPECT_EQ(0u, Minus1.countTrailingZeros());
   EXPECT_EQ(128u, Minus1.countTrailingOnes());
   EXPECT_EQ(128u, Minus1.countPopulation());
   EXPECT_EQ(-1, Minus1.getSExtValue());
 }

 // XFAIL this test on FreeBSD where the system gcc-4.2.1 seems to miscompile it.
 #if defined(__llvm__) || !defined(__FreeBSD__)

 TEST(APIntTest, i33_Count) {
   APInt i33minus2(33, static_cast<uint64_t>(-2), true);
   EXPECT_EQ(0u, i33minus2.countLeadingZeros());
   EXPECT_EQ(32u, i33minus2.countLeadingOnes());
   EXPECT_EQ(33u, i33minus2.getActiveBits());
   EXPECT_EQ(1u, i33minus2.countTrailingZeros());
   EXPECT_EQ(32u, i33minus2.countPopulation());
   EXPECT_EQ(-2, i33minus2.getSExtValue());
   EXPECT_EQ(((uint64_t)-2)&((1ull<<33) -1), i33minus2.getZExtValue());
 }

 #endif

 TEST(APIntTest, i65_Count) {
   APInt i65(65, 0, true);
   EXPECT_EQ(65u, i65.countLeadingZeros());
   EXPECT_EQ(0u, i65.countLeadingOnes());
   EXPECT_EQ(0u, i65.getActiveBits());
   EXPECT_EQ(1u, i65.getActiveWords());
   EXPECT_EQ(65u, i65.countTrailingZeros());
   EXPECT_EQ(0u, i65.countPopulation());

   APInt i65minus(65, 0, true);
   i65minus.setBit(64);
   EXPECT_EQ(0u, i65minus.countLeadingZeros());
   EXPECT_EQ(1u, i65minus.countLeadingOnes());
   EXPECT_EQ(65u, i65minus.getActiveBits());
   EXPECT_EQ(64u, i65minus.countTrailingZeros());
   EXPECT_EQ(1u, i65minus.countPopulation());
 }

 TEST(APIntTest, i128_PositiveCount) {
   APInt u128max = APInt::getAllOnesValue(128);
   EXPECT_EQ(128u, u128max.countLeadingOnes());
   EXPECT_EQ(0u, u128max.countLeadingZeros());
   EXPECT_EQ(128u, u128max.getActiveBits());
   EXPECT_EQ(0u, u128max.countTrailingZeros());
   EXPECT_EQ(128u, u128max.countTrailingOnes());
   EXPECT_EQ(128u, u128max.countPopulation());

   APInt u64max(128, static_cast<uint64_t>(-1), false);
   EXPECT_EQ(64u, u64max.countLeadingZeros());
   EXPECT_EQ(0u, u64max.countLeadingOnes());
   EXPECT_EQ(64u, u64max.getActiveBits());
   EXPECT_EQ(0u, u64max.countTrailingZeros());
   EXPECT_EQ(64u, u64max.countTrailingOnes());
   EXPECT_EQ(64u, u64max.countPopulation());
   EXPECT_EQ((uint64_t)~0ull, u64max.getZExtValue());

   APInt zero(128, 0, true);
   EXPECT_EQ(128u, zero.countLeadingZeros());
   EXPECT_EQ(0u, zero.countLeadingOnes());
   EXPECT_EQ(0u, zero.getActiveBits());
   EXPECT_EQ(128u, zero.countTrailingZeros());
   EXPECT_EQ(0u, zero.countTrailingOnes());
   EXPECT_EQ(0u, zero.countPopulation());
   EXPECT_EQ(0u, zero.getSExtValue());
   EXPECT_EQ(0u, zero.getZExtValue());

   APInt one(128, 1, true);
   EXPECT_EQ(127u, one.countLeadingZeros());
   EXPECT_EQ(0u, one.countLeadingOnes());
   EXPECT_EQ(1u, one.getActiveBits());
   EXPECT_EQ(0u, one.countTrailingZeros());
   EXPECT_EQ(1u, one.countTrailingOnes());
   EXPECT_EQ(1u, one.countPopulation());
   EXPECT_EQ(1, one.getSExtValue());
   EXPECT_EQ(1u, one.getZExtValue());
 }

 TEST(APIntTest, i1) {
   const APInt neg_two(1, static_cast<uint64_t>(-2), true);
   const APInt neg_one(1, static_cast<uint64_t>(-1), true);
   const APInt zero(1, 0);
   const APInt one(1, 1);
   const APInt two(1, 2);

   EXPECT_EQ(0, neg_two.getSExtValue());
   EXPECT_EQ(-1, neg_one.getSExtValue());
   EXPECT_EQ(1u, neg_one.getZExtValue());
   EXPECT_EQ(0u, zero.getZExtValue());
   EXPECT_EQ(-1, one.getSExtValue());
   EXPECT_EQ(1u, one.getZExtValue());
   EXPECT_EQ(0u, two.getZExtValue());
   EXPECT_EQ(0, two.getSExtValue());

   // Basic equalities for 1-bit values.
   EXPECT_EQ(zero, two);
   EXPECT_EQ(zero, neg_two);
   EXPECT_EQ(one, neg_one);
   EXPECT_EQ(two, neg_two);

   // Additions.
   EXPECT_EQ(two, one + one);
   EXPECT_EQ(zero, neg_one + one);
   EXPECT_EQ(neg_two, neg_one + neg_one);

   // Subtractions.
   EXPECT_EQ(neg_two, neg_one - one);
   EXPECT_EQ(two, one - neg_one);
   EXPECT_EQ(zero, one - one);

   // Shifts.
   EXPECT_EQ(zero, one << one);
   EXPECT_EQ(one, one << zero);
   EXPECT_EQ(zero, one.shl(1));
   EXPECT_EQ(one, one.shl(0));
   EXPECT_EQ(zero, one.lshr(1));
   EXPECT_EQ(zero, one.ashr(1));

   // Rotates.
   EXPECT_EQ(one, one.rotl(0));
   EXPECT_EQ(one, one.rotl(1));
   EXPECT_EQ(one, one.rotr(0));
   EXPECT_EQ(one, one.rotr(1));

   // Multiplies.
   EXPECT_EQ(neg_one, neg_one * one);
   EXPECT_EQ(neg_one, one * neg_one);
   EXPECT_EQ(one, neg_one * neg_one);
   EXPECT_EQ(one, one * one);

   // Divides.
   EXPECT_EQ(neg_one, one.sdiv(neg_one));
   EXPECT_EQ(neg_one, neg_one.sdiv(one));
   EXPECT_EQ(one, neg_one.sdiv(neg_one));
   EXPECT_EQ(one, one.sdiv(one));

   EXPECT_EQ(neg_one, one.udiv(neg_one));
   EXPECT_EQ(neg_one, neg_one.udiv(one));
   EXPECT_EQ(one, neg_one.udiv(neg_one));
   EXPECT_EQ(one, one.udiv(one));

   // Remainders.
   EXPECT_EQ(zero, neg_one.srem(one));
   EXPECT_EQ(zero, neg_one.urem(one));
   EXPECT_EQ(zero, one.srem(neg_one));

   // sdivrem
   {
   APInt q(8, 0);
   APInt r(8, 0);
   APInt one(8, 1);
   APInt two(8, 2);
   APInt nine(8, 9);
   APInt four(8, 4);

   EXPECT_EQ(nine.srem(two), one);
   EXPECT_EQ(nine.srem(-two), one);
   EXPECT_EQ((-nine).srem(two), -one);
   EXPECT_EQ((-nine).srem(-two), -one);

   APInt::sdivrem(nine, two, q, r);
   EXPECT_EQ(four, q);
   EXPECT_EQ(one, r);
   APInt::sdivrem(-nine, two, q, r);
   EXPECT_EQ(-four, q);
   EXPECT_EQ(-one, r);
   APInt::sdivrem(nine, -two, q, r);
   EXPECT_EQ(-four, q);
   EXPECT_EQ(one, r);
   APInt::sdivrem(-nine, -two, q, r);
   EXPECT_EQ(four, q);
   EXPECT_EQ(-one, r);
   }
 }

 TEST(APIntTest, fromString) {
   EXPECT_EQ(APInt(32, 0), APInt(32,   "0", 2));
   EXPECT_EQ(APInt(32, 1), APInt(32,   "1", 2));
   EXPECT_EQ(APInt(32, 2), APInt(32,  "10", 2));
   EXPECT_EQ(APInt(32, 3), APInt(32,  "11", 2));
   EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2));

   EXPECT_EQ(APInt(32, 0), APInt(32,   "+0", 2));
   EXPECT_EQ(APInt(32, 1), APInt(32,   "+1", 2));
   EXPECT_EQ(APInt(32, 2), APInt(32,  "+10", 2));
   EXPECT_EQ(APInt(32, 3), APInt(32,  "+11", 2));
   EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2));

   EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32,   "-0", 2));
   EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32,   "-1", 2));
   EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32,  "-10", 2));
   EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32,  "-11", 2));
   EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2));


   EXPECT_EQ(APInt(32,  0), APInt(32,  "0",  8));
   EXPECT_EQ(APInt(32,  1), APInt(32,  "1",  8));
   EXPECT_EQ(APInt(32,  7), APInt(32,  "7",  8));
   EXPECT_EQ(APInt(32,  8), APInt(32,  "10", 8));
   EXPECT_EQ(APInt(32, 15), APInt(32,  "17", 8));
   EXPECT_EQ(APInt(32, 16), APInt(32,  "20", 8));

   EXPECT_EQ(APInt(32,  +0), APInt(32,  "+0",  8));
   EXPECT_EQ(APInt(32,  +1), APInt(32,  "+1",  8));
   EXPECT_EQ(APInt(32,  +7), APInt(32,  "+7",  8));
   EXPECT_EQ(APInt(32,  +8), APInt(32,  "+10", 8));
   EXPECT_EQ(APInt(32, +15), APInt(32,  "+17", 8));
   EXPECT_EQ(APInt(32, +16), APInt(32,  "+20", 8));

   EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0",  8));
   EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1",  8));
   EXPECT_EQ(APInt(32,  uint64_t(-7LL)), APInt(32,  "-7",  8));
   EXPECT_EQ(APInt(32,  uint64_t(-8LL)), APInt(32,  "-10", 8));
   EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32,  "-17", 8));
   EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32,  "-20", 8));


   EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 10));
   EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 10));
   EXPECT_EQ(APInt(32,  9), APInt(32,  "9", 10));
   EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10));
   EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10));
   EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10));

   EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 10));
   EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 10));
   EXPECT_EQ(APInt(32,  uint64_t(-9LL)), APInt(32,  "-9", 10));
   EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10));
   EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10));
   EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10));


   EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 16));
   EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 16));
   EXPECT_EQ(APInt(32, 15), APInt(32,  "F", 16));
   EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16));
   EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16));
   EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16));

   EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 16));
   EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 16));
   EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32,  "-F", 16));
   EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16));
   EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16));
   EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16));

   EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 36));
   EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 36));
   EXPECT_EQ(APInt(32, 35), APInt(32,  "Z", 36));
   EXPECT_EQ(APInt(32, 36), APInt(32, "10", 36));
   EXPECT_EQ(APInt(32, 71), APInt(32, "1Z", 36));
   EXPECT_EQ(APInt(32, 72), APInt(32, "20", 36));

   EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 36));
   EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 36));
   EXPECT_EQ(APInt(32, uint64_t(-35LL)), APInt(32,  "-Z", 36));
   EXPECT_EQ(APInt(32, uint64_t(-36LL)), APInt(32, "-10", 36));
   EXPECT_EQ(APInt(32, uint64_t(-71LL)), APInt(32, "-1Z", 36));
   EXPECT_EQ(APInt(32, uint64_t(-72LL)), APInt(32, "-20", 36));
 }

 TEST(APIntTest, FromArray) {
   EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1)));
 }

 TEST(APIntTest, StringBitsNeeded2) {
   EXPECT_EQ(1U, APInt::getBitsNeeded(  "0", 2));
   EXPECT_EQ(1U, APInt::getBitsNeeded(  "1", 2));
   EXPECT_EQ(2U, APInt::getBitsNeeded( "10", 2));
   EXPECT_EQ(2U, APInt::getBitsNeeded( "11", 2));
   EXPECT_EQ(3U, APInt::getBitsNeeded("100", 2));

   EXPECT_EQ(1U, APInt::getBitsNeeded(  "+0", 2));
   EXPECT_EQ(1U, APInt::getBitsNeeded(  "+1", 2));
   EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2));
   EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2));
   EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2));

   EXPECT_EQ(2U, APInt::getBitsNeeded(  "-0", 2));
   EXPECT_EQ(2U, APInt::getBitsNeeded(  "-1", 2));
   EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2));
   EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2));
   EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2));
 }

 TEST(APIntTest, StringBitsNeeded8) {
   EXPECT_EQ(3U, APInt::getBitsNeeded( "0", 8));
   EXPECT_EQ(3U, APInt::getBitsNeeded( "7", 8));
   EXPECT_EQ(6U, APInt::getBitsNeeded("10", 8));
   EXPECT_EQ(6U, APInt::getBitsNeeded("17", 8));
   EXPECT_EQ(6U, APInt::getBitsNeeded("20", 8));

   EXPECT_EQ(3U, APInt::getBitsNeeded( "+0", 8));
   EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8));
   EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8));
   EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8));
   EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8));

   EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8));
   EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8));
   EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8));
   EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8));
   EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8));
 }

 TEST(APIntTest, StringBitsNeeded10) {
   EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10));
   EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 10));
   EXPECT_EQ(4U, APInt::getBitsNeeded( "9", 10));
   EXPECT_EQ(4U, APInt::getBitsNeeded("10", 10));
   EXPECT_EQ(5U, APInt::getBitsNeeded("19", 10));
   EXPECT_EQ(5U, APInt::getBitsNeeded("20", 10));

   EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 10));
   EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10));
   EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10));
   EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10));
   EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10));

   EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10));
   EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10));
   EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10));
   EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10));
   EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10));
 }

 TEST(APIntTest, StringBitsNeeded16) {
   EXPECT_EQ(4U, APInt::getBitsNeeded( "0", 16));
   EXPECT_EQ(4U, APInt::getBitsNeeded( "F", 16));
   EXPECT_EQ(8U, APInt::getBitsNeeded("10", 16));
   EXPECT_EQ(8U, APInt::getBitsNeeded("1F", 16));
   EXPECT_EQ(8U, APInt::getBitsNeeded("20", 16));

   EXPECT_EQ(4U, APInt::getBitsNeeded( "+0", 16));
   EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16));
   EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16));
   EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16));
   EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16));

   EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16));
   EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16));
   EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16));
   EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16));
   EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16));
 }

 TEST(APIntTest, toString) {
   SmallString<16> S;
   bool isSigned;

   APInt(8, 0).toString(S, 2, true, true);
   EXPECT_EQ(S.str().str(), "0b0");
   S.clear();
   APInt(8, 0).toString(S, 8, true, true);
   EXPECT_EQ(S.str().str(), "00");
   S.clear();
   APInt(8, 0).toString(S, 10, true, true);
   EXPECT_EQ(S.str().str(), "0");
   S.clear();
   APInt(8, 0).toString(S, 16, true, true);
   EXPECT_EQ(S.str().str(), "0x0");
   S.clear();
   APInt(8, 0).toString(S, 36, true, false);
   EXPECT_EQ(S.str().str(), "0");
   S.clear();

   isSigned = false;
   APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
   EXPECT_EQ(S.str().str(), "0b11111111");
   S.clear();
   APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
   EXPECT_EQ(S.str().str(), "0377");
   S.clear();
   APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
   EXPECT_EQ(S.str().str(), "255");
   S.clear();
   APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
   EXPECT_EQ(S.str().str(), "0xFF");
   S.clear();
   APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
   EXPECT_EQ(S.str().str(), "73");
   S.clear();

   isSigned = true;
   APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
   EXPECT_EQ(S.str().str(), "-0b1");
   S.clear();
   APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
   EXPECT_EQ(S.str().str(), "-01");
   S.clear();
   APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
   EXPECT_EQ(S.str().str(), "-1");
   S.clear();
   APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
   EXPECT_EQ(S.str().str(), "-0x1");
   S.clear();
   APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
   EXPECT_EQ(S.str().str(), "-1");
   S.clear();
 }

 TEST(APIntTest, Log2) {
   EXPECT_EQ(APInt(15, 7).logBase2(), 2U);
   EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U);
   EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1);
   EXPECT_EQ(APInt(15, 8).logBase2(), 3U);
   EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U);
   EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3);
   EXPECT_EQ(APInt(15, 9).logBase2(), 3U);
   EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U);
   EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1);
 }

 TEST(APIntTest, magic) {
   EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16));
   EXPECT_EQ(APInt(32, 3).magic().s, 0U);
   EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16));
   EXPECT_EQ(APInt(32, 5).magic().s, 1U);
   EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16));
   EXPECT_EQ(APInt(32, 7).magic().s, 2U);
 }

 TEST(APIntTest, magicu) {
   EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16));
   EXPECT_EQ(APInt(32, 3).magicu().s, 1U);
   EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16));
   EXPECT_EQ(APInt(32, 5).magicu().s, 2U);
   EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16));
   EXPECT_EQ(APInt(32, 7).magicu().s, 3U);
   EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16));
   EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U);
 }

 #ifdef GTEST_HAS_DEATH_TEST
 #ifndef NDEBUG
 TEST(APIntTest, StringDeath) {
   EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small");
   EXPECT_DEATH(APInt(32, "", 0), "Invalid string length");
   EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, 16, or 36!");
   EXPECT_DEATH(APInt(32, "", 10), "Invalid string length");
   EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value.");
   EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width");
   EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length");
   EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string");
   EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string");
 }
 #endif
 #endif

 TEST(APIntTest, mul_clear) {
   APInt ValA(65, -1ULL);
   APInt ValB(65, 4);
   APInt ValC(65, 0);
   ValC = ValA * ValB;
   ValA *= ValB;
   EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false));
 }

 TEST(APIntTest, Rotate) {
   EXPECT_EQ(APInt(8, 1),  APInt(8, 1).rotl(0));
   EXPECT_EQ(APInt(8, 2),  APInt(8, 1).rotl(1));
   EXPECT_EQ(APInt(8, 4),  APInt(8, 1).rotl(2));
   EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotl(4));
   EXPECT_EQ(APInt(8, 1),  APInt(8, 1).rotl(8));

   EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(0));
   EXPECT_EQ(APInt(8, 32), APInt(8, 16).rotl(1));
   EXPECT_EQ(APInt(8, 64), APInt(8, 16).rotl(2));
   EXPECT_EQ(APInt(8, 1),  APInt(8, 16).rotl(4));
   EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(8));

   EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(0));
   EXPECT_EQ(APInt(8, 8),  APInt(8, 16).rotr(1));
   EXPECT_EQ(APInt(8, 4),  APInt(8, 16).rotr(2));
   EXPECT_EQ(APInt(8, 1),  APInt(8, 16).rotr(4));
   EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(8));

   EXPECT_EQ(APInt(8, 1),   APInt(8, 1).rotr(0));
   EXPECT_EQ(APInt(8, 128), APInt(8, 1).rotr(1));
   EXPECT_EQ(APInt(8, 64),  APInt(8, 1).rotr(2));
   EXPECT_EQ(APInt(8, 16),  APInt(8, 1).rotr(4));
   EXPECT_EQ(APInt(8, 1),   APInt(8, 1).rotr(8));

   APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16);
   APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16);
   EXPECT_EQ(Rot, Big.rotr(144));
 }

 TEST(APIntTest, Splat) {
   APInt ValA(8, 0x01);
   EXPECT_EQ(ValA, APInt::getSplat(8, ValA));
   EXPECT_EQ(APInt(64, 0x0101010101010101ULL), APInt::getSplat(64, ValA));

   APInt ValB(3, 5);
   EXPECT_EQ(APInt(4, 0xD), APInt::getSplat(4, ValB));
   EXPECT_EQ(APInt(15, 0xDB6D), APInt::getSplat(15, ValB));
 }

 }
	//===- llvm/unittest/ADT/APInt.cpp - APInt unit tests ---------------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#include "llvm/ADT/APInt.h"
	#include "llvm/ADT/SmallString.h"
	#include "gtest/gtest.h"
	#include <ostream>

	using namespace llvm;

	namespace {

	// Test that APInt shift left works when bitwidth > 64 and shiftamt == 0
	TEST(APIntTest, ShiftLeftByZero) {
	APInt One = APInt::getNullValue(65) + 1;
	APInt Shl = One.shl(0);
	EXPECT_TRUE(Shl[0]);
	EXPECT_FALSE(Shl[1]);
	}

	TEST(APIntTest, i128_NegativeCount) {
	APInt Minus3(128, static_cast<uint64_t>(-3), true);
	EXPECT_EQ(126u, Minus3.countLeadingOnes());
	EXPECT_EQ(-3, Minus3.getSExtValue());

	APInt Minus1(128, static_cast<uint64_t>(-1), true);
	EXPECT_EQ(0u, Minus1.countLeadingZeros());
	EXPECT_EQ(128u, Minus1.countLeadingOnes());
	EXPECT_EQ(128u, Minus1.getActiveBits());
	EXPECT_EQ(0u, Minus1.countTrailingZeros());
	EXPECT_EQ(128u, Minus1.countTrailingOnes());
	EXPECT_EQ(128u, Minus1.countPopulation());
	EXPECT_EQ(-1, Minus1.getSExtValue());
	}

	// XFAIL this test on FreeBSD where the system gcc-4.2.1 seems to miscompile it.
	#if defined(__llvm__) \|\| !defined(__FreeBSD__)

	TEST(APIntTest, i33_Count) {
	APInt i33minus2(33, static_cast<uint64_t>(-2), true);
	EXPECT_EQ(0u, i33minus2.countLeadingZeros());
	EXPECT_EQ(32u, i33minus2.countLeadingOnes());
	EXPECT_EQ(33u, i33minus2.getActiveBits());
	EXPECT_EQ(1u, i33minus2.countTrailingZeros());
	EXPECT_EQ(32u, i33minus2.countPopulation());
	EXPECT_EQ(-2, i33minus2.getSExtValue());
	EXPECT_EQ(((uint64_t)-2)&((1ull<<33) -1), i33minus2.getZExtValue());
	}

	#endif

	TEST(APIntTest, i65_Count) {
	APInt i65(65, 0, true);
	EXPECT_EQ(65u, i65.countLeadingZeros());
	EXPECT_EQ(0u, i65.countLeadingOnes());
	EXPECT_EQ(0u, i65.getActiveBits());
	EXPECT_EQ(1u, i65.getActiveWords());
	EXPECT_EQ(65u, i65.countTrailingZeros());
	EXPECT_EQ(0u, i65.countPopulation());

	APInt i65minus(65, 0, true);
	i65minus.setBit(64);
	EXPECT_EQ(0u, i65minus.countLeadingZeros());
	EXPECT_EQ(1u, i65minus.countLeadingOnes());
	EXPECT_EQ(65u, i65minus.getActiveBits());
	EXPECT_EQ(64u, i65minus.countTrailingZeros());
	EXPECT_EQ(1u, i65minus.countPopulation());
	}

	TEST(APIntTest, i128_PositiveCount) {
	APInt u128max = APInt::getAllOnesValue(128);
	EXPECT_EQ(128u, u128max.countLeadingOnes());
	EXPECT_EQ(0u, u128max.countLeadingZeros());
	EXPECT_EQ(128u, u128max.getActiveBits());
	EXPECT_EQ(0u, u128max.countTrailingZeros());
	EXPECT_EQ(128u, u128max.countTrailingOnes());
	EXPECT_EQ(128u, u128max.countPopulation());

	APInt u64max(128, static_cast<uint64_t>(-1), false);
	EXPECT_EQ(64u, u64max.countLeadingZeros());
	EXPECT_EQ(0u, u64max.countLeadingOnes());
	EXPECT_EQ(64u, u64max.getActiveBits());
	EXPECT_EQ(0u, u64max.countTrailingZeros());
	EXPECT_EQ(64u, u64max.countTrailingOnes());
	EXPECT_EQ(64u, u64max.countPopulation());
	EXPECT_EQ((uint64_t)~0ull, u64max.getZExtValue());

	APInt zero(128, 0, true);
	EXPECT_EQ(128u, zero.countLeadingZeros());
	EXPECT_EQ(0u, zero.countLeadingOnes());
	EXPECT_EQ(0u, zero.getActiveBits());
	EXPECT_EQ(128u, zero.countTrailingZeros());
	EXPECT_EQ(0u, zero.countTrailingOnes());
	EXPECT_EQ(0u, zero.countPopulation());
	EXPECT_EQ(0u, zero.getSExtValue());
	EXPECT_EQ(0u, zero.getZExtValue());

	APInt one(128, 1, true);
	EXPECT_EQ(127u, one.countLeadingZeros());
	EXPECT_EQ(0u, one.countLeadingOnes());
	EXPECT_EQ(1u, one.getActiveBits());
	EXPECT_EQ(0u, one.countTrailingZeros());
	EXPECT_EQ(1u, one.countTrailingOnes());
	EXPECT_EQ(1u, one.countPopulation());
	EXPECT_EQ(1, one.getSExtValue());
	EXPECT_EQ(1u, one.getZExtValue());
	}

	TEST(APIntTest, i1) {
	const APInt neg_two(1, static_cast<uint64_t>(-2), true);
	const APInt neg_one(1, static_cast<uint64_t>(-1), true);
	const APInt zero(1, 0);
	const APInt one(1, 1);
	const APInt two(1, 2);

	EXPECT_EQ(0, neg_two.getSExtValue());
	EXPECT_EQ(-1, neg_one.getSExtValue());
	EXPECT_EQ(1u, neg_one.getZExtValue());
	EXPECT_EQ(0u, zero.getZExtValue());
	EXPECT_EQ(-1, one.getSExtValue());
	EXPECT_EQ(1u, one.getZExtValue());
	EXPECT_EQ(0u, two.getZExtValue());
	EXPECT_EQ(0, two.getSExtValue());

	// Basic equalities for 1-bit values.
	EXPECT_EQ(zero, two);
	EXPECT_EQ(zero, neg_two);
	EXPECT_EQ(one, neg_one);
	EXPECT_EQ(two, neg_two);

	// Additions.
	EXPECT_EQ(two, one + one);
	EXPECT_EQ(zero, neg_one + one);
	EXPECT_EQ(neg_two, neg_one + neg_one);

	// Subtractions.
	EXPECT_EQ(neg_two, neg_one - one);
	EXPECT_EQ(two, one - neg_one);
	EXPECT_EQ(zero, one - one);

	// Shifts.
	EXPECT_EQ(zero, one << one);
	EXPECT_EQ(one, one << zero);
	EXPECT_EQ(zero, one.shl(1));
	EXPECT_EQ(one, one.shl(0));
	EXPECT_EQ(zero, one.lshr(1));
	EXPECT_EQ(zero, one.ashr(1));

	// Rotates.
	EXPECT_EQ(one, one.rotl(0));
	EXPECT_EQ(one, one.rotl(1));
	EXPECT_EQ(one, one.rotr(0));
	EXPECT_EQ(one, one.rotr(1));

	// Multiplies.
	EXPECT_EQ(neg_one, neg_one * one);
	EXPECT_EQ(neg_one, one * neg_one);
	EXPECT_EQ(one, neg_one * neg_one);
	EXPECT_EQ(one, one * one);

	// Divides.
	EXPECT_EQ(neg_one, one.sdiv(neg_one));
	EXPECT_EQ(neg_one, neg_one.sdiv(one));
	EXPECT_EQ(one, neg_one.sdiv(neg_one));
	EXPECT_EQ(one, one.sdiv(one));

	EXPECT_EQ(neg_one, one.udiv(neg_one));
	EXPECT_EQ(neg_one, neg_one.udiv(one));
	EXPECT_EQ(one, neg_one.udiv(neg_one));
	EXPECT_EQ(one, one.udiv(one));

	// Remainders.
	EXPECT_EQ(zero, neg_one.srem(one));
	EXPECT_EQ(zero, neg_one.urem(one));
	EXPECT_EQ(zero, one.srem(neg_one));

	// sdivrem
	{
	APInt q(8, 0);
	APInt r(8, 0);
	APInt one(8, 1);
	APInt two(8, 2);
	APInt nine(8, 9);
	APInt four(8, 4);

	EXPECT_EQ(nine.srem(two), one);
	EXPECT_EQ(nine.srem(-two), one);
	EXPECT_EQ((-nine).srem(two), -one);
	EXPECT_EQ((-nine).srem(-two), -one);

	APInt::sdivrem(nine, two, q, r);
	EXPECT_EQ(four, q);
	EXPECT_EQ(one, r);
	APInt::sdivrem(-nine, two, q, r);
	EXPECT_EQ(-four, q);
	EXPECT_EQ(-one, r);
	APInt::sdivrem(nine, -two, q, r);
	EXPECT_EQ(-four, q);
	EXPECT_EQ(one, r);
	APInt::sdivrem(-nine, -two, q, r);
	EXPECT_EQ(four, q);
	EXPECT_EQ(-one, r);
	}
	}

	TEST(APIntTest, fromString) {
	EXPECT_EQ(APInt(32, 0), APInt(32, "0", 2));
	EXPECT_EQ(APInt(32, 1), APInt(32, "1", 2));
	EXPECT_EQ(APInt(32, 2), APInt(32, "10", 2));
	EXPECT_EQ(APInt(32, 3), APInt(32, "11", 2));
	EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2));

	EXPECT_EQ(APInt(32, 0), APInt(32, "+0", 2));
	EXPECT_EQ(APInt(32, 1), APInt(32, "+1", 2));
	EXPECT_EQ(APInt(32, 2), APInt(32, "+10", 2));
	EXPECT_EQ(APInt(32, 3), APInt(32, "+11", 2));
	EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2));

	EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 2));
	EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 2));
	EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32, "-10", 2));
	EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32, "-11", 2));
	EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2));


	EXPECT_EQ(APInt(32, 0), APInt(32, "0", 8));
	EXPECT_EQ(APInt(32, 1), APInt(32, "1", 8));
	EXPECT_EQ(APInt(32, 7), APInt(32, "7", 8));
	EXPECT_EQ(APInt(32, 8), APInt(32, "10", 8));
	EXPECT_EQ(APInt(32, 15), APInt(32, "17", 8));
	EXPECT_EQ(APInt(32, 16), APInt(32, "20", 8));

	EXPECT_EQ(APInt(32, +0), APInt(32, "+0", 8));
	EXPECT_EQ(APInt(32, +1), APInt(32, "+1", 8));
	EXPECT_EQ(APInt(32, +7), APInt(32, "+7", 8));
	EXPECT_EQ(APInt(32, +8), APInt(32, "+10", 8));
	EXPECT_EQ(APInt(32, +15), APInt(32, "+17", 8));
	EXPECT_EQ(APInt(32, +16), APInt(32, "+20", 8));

	EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 8));
	EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 8));
	EXPECT_EQ(APInt(32, uint64_t(-7LL)), APInt(32, "-7", 8));
	EXPECT_EQ(APInt(32, uint64_t(-8LL)), APInt(32, "-10", 8));
	EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-17", 8));
	EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-20", 8));


	EXPECT_EQ(APInt(32, 0), APInt(32, "0", 10));
	EXPECT_EQ(APInt(32, 1), APInt(32, "1", 10));
	EXPECT_EQ(APInt(32, 9), APInt(32, "9", 10));
	EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10));
	EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10));
	EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10));

	EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 10));
	EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 10));
	EXPECT_EQ(APInt(32, uint64_t(-9LL)), APInt(32, "-9", 10));
	EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10));
	EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10));
	EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10));


	EXPECT_EQ(APInt(32, 0), APInt(32, "0", 16));
	EXPECT_EQ(APInt(32, 1), APInt(32, "1", 16));
	EXPECT_EQ(APInt(32, 15), APInt(32, "F", 16));
	EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16));
	EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16));
	EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16));

	EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 16));
	EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 16));
	EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-F", 16));
	EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16));
	EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16));
	EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16));

	EXPECT_EQ(APInt(32, 0), APInt(32, "0", 36));
	EXPECT_EQ(APInt(32, 1), APInt(32, "1", 36));
	EXPECT_EQ(APInt(32, 35), APInt(32, "Z", 36));
	EXPECT_EQ(APInt(32, 36), APInt(32, "10", 36));
	EXPECT_EQ(APInt(32, 71), APInt(32, "1Z", 36));
	EXPECT_EQ(APInt(32, 72), APInt(32, "20", 36));

	EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 36));
	EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 36));
	EXPECT_EQ(APInt(32, uint64_t(-35LL)), APInt(32, "-Z", 36));
	EXPECT_EQ(APInt(32, uint64_t(-36LL)), APInt(32, "-10", 36));
	EXPECT_EQ(APInt(32, uint64_t(-71LL)), APInt(32, "-1Z", 36));
	EXPECT_EQ(APInt(32, uint64_t(-72LL)), APInt(32, "-20", 36));
	}

	TEST(APIntTest, FromArray) {
	EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1)));
	}

	TEST(APIntTest, StringBitsNeeded2) {
	EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 2));
	EXPECT_EQ(1U, APInt::getBitsNeeded( "1", 2));
	EXPECT_EQ(2U, APInt::getBitsNeeded( "10", 2));
	EXPECT_EQ(2U, APInt::getBitsNeeded( "11", 2));
	EXPECT_EQ(3U, APInt::getBitsNeeded("100", 2));

	EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 2));
	EXPECT_EQ(1U, APInt::getBitsNeeded( "+1", 2));
	EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2));
	EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2));
	EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2));

	EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 2));
	EXPECT_EQ(2U, APInt::getBitsNeeded( "-1", 2));
	EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2));
	EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2));
	EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2));
	}

	TEST(APIntTest, StringBitsNeeded8) {
	EXPECT_EQ(3U, APInt::getBitsNeeded( "0", 8));
	EXPECT_EQ(3U, APInt::getBitsNeeded( "7", 8));
	EXPECT_EQ(6U, APInt::getBitsNeeded("10", 8));
	EXPECT_EQ(6U, APInt::getBitsNeeded("17", 8));
	EXPECT_EQ(6U, APInt::getBitsNeeded("20", 8));

	EXPECT_EQ(3U, APInt::getBitsNeeded( "+0", 8));
	EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8));
	EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8));
	EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8));
	EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8));

	EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8));
	EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8));
	EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8));
	EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8));
	EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8));
	}

	TEST(APIntTest, StringBitsNeeded10) {
	EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10));
	EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 10));
	EXPECT_EQ(4U, APInt::getBitsNeeded( "9", 10));
	EXPECT_EQ(4U, APInt::getBitsNeeded("10", 10));
	EXPECT_EQ(5U, APInt::getBitsNeeded("19", 10));
	EXPECT_EQ(5U, APInt::getBitsNeeded("20", 10));

	EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 10));
	EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10));
	EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10));
	EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10));
	EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10));

	EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10));
	EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10));
	EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10));
	EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10));
	EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10));
	}

	TEST(APIntTest, StringBitsNeeded16) {
	EXPECT_EQ(4U, APInt::getBitsNeeded( "0", 16));
	EXPECT_EQ(4U, APInt::getBitsNeeded( "F", 16));
	EXPECT_EQ(8U, APInt::getBitsNeeded("10", 16));
	EXPECT_EQ(8U, APInt::getBitsNeeded("1F", 16));
	EXPECT_EQ(8U, APInt::getBitsNeeded("20", 16));

	EXPECT_EQ(4U, APInt::getBitsNeeded( "+0", 16));
	EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16));
	EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16));
	EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16));
	EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16));

	EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16));
	EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16));
	EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16));
	EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16));
	EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16));
	}

	TEST(APIntTest, toString) {
	SmallString<16> S;
	bool isSigned;

	APInt(8, 0).toString(S, 2, true, true);
	EXPECT_EQ(S.str().str(), "0b0");
	S.clear();
	APInt(8, 0).toString(S, 8, true, true);
	EXPECT_EQ(S.str().str(), "00");
	S.clear();
	APInt(8, 0).toString(S, 10, true, true);
	EXPECT_EQ(S.str().str(), "0");
	S.clear();
	APInt(8, 0).toString(S, 16, true, true);
	EXPECT_EQ(S.str().str(), "0x0");
	S.clear();
	APInt(8, 0).toString(S, 36, true, false);
	EXPECT_EQ(S.str().str(), "0");
	S.clear();

	isSigned = false;
	APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
	EXPECT_EQ(S.str().str(), "0b11111111");
	S.clear();
	APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
	EXPECT_EQ(S.str().str(), "0377");
	S.clear();
	APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
	EXPECT_EQ(S.str().str(), "255");
	S.clear();
	APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
	EXPECT_EQ(S.str().str(), "0xFF");
	S.clear();
	APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
	EXPECT_EQ(S.str().str(), "73");
	S.clear();

	isSigned = true;
	APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
	EXPECT_EQ(S.str().str(), "-0b1");
	S.clear();
	APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
	EXPECT_EQ(S.str().str(), "-01");
	S.clear();
	APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
	EXPECT_EQ(S.str().str(), "-1");
	S.clear();
	APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
	EXPECT_EQ(S.str().str(), "-0x1");
	S.clear();
	APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
	EXPECT_EQ(S.str().str(), "-1");
	S.clear();
	}

	TEST(APIntTest, Log2) {
	EXPECT_EQ(APInt(15, 7).logBase2(), 2U);
	EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U);
	EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1);
	EXPECT_EQ(APInt(15, 8).logBase2(), 3U);
	EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U);
	EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3);
	EXPECT_EQ(APInt(15, 9).logBase2(), 3U);
	EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U);
	EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1);
	}

	TEST(APIntTest, magic) {
	EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16));
	EXPECT_EQ(APInt(32, 3).magic().s, 0U);
	EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16));
	EXPECT_EQ(APInt(32, 5).magic().s, 1U);
	EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16));
	EXPECT_EQ(APInt(32, 7).magic().s, 2U);
	}

	TEST(APIntTest, magicu) {
	EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16));
	EXPECT_EQ(APInt(32, 3).magicu().s, 1U);
	EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16));
	EXPECT_EQ(APInt(32, 5).magicu().s, 2U);
	EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16));
	EXPECT_EQ(APInt(32, 7).magicu().s, 3U);
	EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16));
	EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U);
	}

	#ifdef GTEST_HAS_DEATH_TEST
	#ifndef NDEBUG
	TEST(APIntTest, StringDeath) {
	EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small");
	EXPECT_DEATH(APInt(32, "", 0), "Invalid string length");
	EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, 16, or 36!");
	EXPECT_DEATH(APInt(32, "", 10), "Invalid string length");
	EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value.");
	EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width");
	EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length");
	EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string");
	EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string");
	}
	#endif
	#endif

	TEST(APIntTest, mul_clear) {
	APInt ValA(65, -1ULL);
	APInt ValB(65, 4);
	APInt ValC(65, 0);
	ValC = ValA * ValB;
	ValA *= ValB;
	EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false));
	}

	TEST(APIntTest, Rotate) {
	EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(0));
	EXPECT_EQ(APInt(8, 2), APInt(8, 1).rotl(1));
	EXPECT_EQ(APInt(8, 4), APInt(8, 1).rotl(2));
	EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotl(4));
	EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(8));

	EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(0));
	EXPECT_EQ(APInt(8, 32), APInt(8, 16).rotl(1));
	EXPECT_EQ(APInt(8, 64), APInt(8, 16).rotl(2));
	EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotl(4));
	EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(8));

	EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(0));
	EXPECT_EQ(APInt(8, 8), APInt(8, 16).rotr(1));
	EXPECT_EQ(APInt(8, 4), APInt(8, 16).rotr(2));
	EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotr(4));
	EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(8));

	EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(0));
	EXPECT_EQ(APInt(8, 128), APInt(8, 1).rotr(1));
	EXPECT_EQ(APInt(8, 64), APInt(8, 1).rotr(2));
	EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotr(4));
	EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(8));

	APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16);
	APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16);
	EXPECT_EQ(Rot, Big.rotr(144));
	}

	TEST(APIntTest, Splat) {
	APInt ValA(8, 0x01);
	EXPECT_EQ(ValA, APInt::getSplat(8, ValA));
	EXPECT_EQ(APInt(64, 0x0101010101010101ULL), APInt::getSplat(64, ValA));

	APInt ValB(3, 5);
	EXPECT_EQ(APInt(4, 0xD), APInt::getSplat(4, ValB));
	EXPECT_EQ(APInt(15, 0xDB6D), APInt::getSplat(15, ValB));
	}

	}