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//===- 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 "gtest/gtest.h"
#include "llvm/ADT/APInt.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_EQ(true, Shl[0]);
EXPECT_EQ(false, Shl[1]);
}
TEST(APIntTest, I128NegativeCount) {
APInt Minus3(128, (uint64_t)-3, true);
EXPECT_EQ(126u, Minus3.countLeadingOnes());
EXPECT_EQ(-3, Minus3.getSExtValue());
APInt Minus1(128, (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, I33Count) {
APInt i33minus2(33, -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, I65Count) {
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, I128PositiveCount) {
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, (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());
}
}
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