unittests/ADT/APIntTest.cpp - fp2-dev/platform/external/llvm - Gitiles

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

 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());
 }

 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());
 }

 TEST(APIntTest, i65_Count) {
   APInt i65minus(65, 0, true);
   i65minus.set(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));

   // 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));
 }

 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));
 }

 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, 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);
 }

 #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, or 16!");
   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

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

	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());
	}

	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());
	}

	TEST(APIntTest, i65_Count) {
	APInt i65minus(65, 0, true);
	i65minus.set(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));

	// 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));
	}

	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));
	}

	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, 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);
	}

	#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, or 16!");
	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

	}