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#include "llvm/Support/CheckedArithmetic.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(CheckedArithmetic, CheckedAdd) {
int64_t Out;
const int64_t Max = std::numeric_limits<int64_t>::max();
const int64_t Min = std::numeric_limits<int64_t>::min();
EXPECT_EQ(checkedAdd<int64_t>(Max, Max, &Out), true);
EXPECT_EQ(checkedAdd<int64_t>(Min, -1, &Out), true);
EXPECT_EQ(checkedAdd<int64_t>(Max, 1, &Out), true);
EXPECT_EQ(checkedAdd<int64_t>(10, 1, &Out), false);
EXPECT_EQ(Out, 11);
}
TEST(CheckedArithmetic, CheckedAddSmall) {
int16_t Out;
const int16_t Max = std::numeric_limits<int16_t>::max();
const int16_t Min = std::numeric_limits<int16_t>::min();
EXPECT_EQ(checkedAdd<int16_t>(Max, Max, &Out), true);
EXPECT_EQ(checkedAdd<int16_t>(Min, -1, &Out), true);
EXPECT_EQ(checkedAdd<int16_t>(Max, 1, &Out), true);
EXPECT_EQ(checkedAdd<int16_t>(10, 1, &Out), false);
EXPECT_EQ(Out, 11);
}
TEST(CheckedArithmetic, CheckedMul) {
int64_t Out;
const int64_t Max = std::numeric_limits<int64_t>::max();
const int64_t Min = std::numeric_limits<int64_t>::min();
EXPECT_EQ(checkedMul<int64_t>(Max, 2, &Out), true);
EXPECT_EQ(checkedMul<int64_t>(Max, Max, &Out), true);
EXPECT_EQ(checkedMul<int64_t>(Min, 2, &Out), true);
EXPECT_EQ(checkedMul<int64_t>(10, 2, &Out), false);
EXPECT_EQ(Out, 20);
}
TEST(CheckedArithmetic, CheckedMulSmall) {
int16_t Out;
const int16_t Max = std::numeric_limits<int16_t>::max();
const int16_t Min = std::numeric_limits<int16_t>::min();
EXPECT_EQ(checkedMul<int16_t>(Max, 2, &Out), true);
EXPECT_EQ(checkedMul<int16_t>(Max, Max, &Out), true);
EXPECT_EQ(checkedMul<int16_t>(Min, 2, &Out), true);
EXPECT_EQ(checkedMul<int16_t>(10, 2, &Out), false);
EXPECT_EQ(Out, 20);
}
TEST(CheckedArithmetic, CheckedAddUnsigned) {
uint64_t Out;
const uint64_t Max = std::numeric_limits<uint64_t>::max();
EXPECT_EQ(checkedAddUnsigned<uint64_t>(Max, Max, &Out), true);
EXPECT_EQ(checkedAddUnsigned<uint64_t>(Max, 1, &Out), true);
EXPECT_EQ(checkedAddUnsigned<uint64_t>(10, 1, &Out), false);
EXPECT_EQ(Out, uint64_t(11));
}
TEST(CheckedArithmetic, CheckedMulUnsigned) {
uint64_t Out;
const uint64_t Max = std::numeric_limits<uint64_t>::max();
EXPECT_EQ(checkedMulUnsigned<uint64_t>(Max, 2, &Out), true);
EXPECT_EQ(checkedMulUnsigned<uint64_t>(Max, Max, &Out), true);
EXPECT_EQ(checkedMulUnsigned<uint64_t>(10, 2, &Out), false);
EXPECT_EQ(Out, uint64_t(20));
}
} // namespace
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