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#include "llvm/Support/CheckedArithmetic.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(CheckedArithmetic, CheckedAdd) {
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), std::nullopt);
EXPECT_EQ(checkedAdd<int64_t>(Min, -1), std::nullopt);
EXPECT_EQ(checkedAdd<int64_t>(Max, 1), std::nullopt);
EXPECT_EQ(checkedAdd<int64_t>(10, 1), std::optional<int64_t>(11));
}
TEST(CheckedArithmetic, CheckedAddSmall) {
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), std::nullopt);
EXPECT_EQ(checkedAdd<int16_t>(Min, -1), std::nullopt);
EXPECT_EQ(checkedAdd<int16_t>(Max, 1), std::nullopt);
EXPECT_EQ(checkedAdd<int16_t>(10, 1), std::optional<int64_t>(11));
}
TEST(CheckedArithmetic, CheckedMul) {
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), std::nullopt);
EXPECT_EQ(checkedMul<int64_t>(Max, Max), std::nullopt);
EXPECT_EQ(checkedMul<int64_t>(Min, 2), std::nullopt);
EXPECT_EQ(checkedMul<int64_t>(10, 2), std::optional<int64_t>(20));
}
TEST(CheckedArithmetic, CheckedMulAdd) {
const int64_t Max = std::numeric_limits<int64_t>::max();
const int64_t Min = std::numeric_limits<int64_t>::min();
EXPECT_EQ(checkedMulAdd<int64_t>(Max, 1, 2), std::nullopt);
EXPECT_EQ(checkedMulAdd<int64_t>(1, 1, Max), std::nullopt);
EXPECT_EQ(checkedMulAdd<int64_t>(1, -1, Min), std::nullopt);
EXPECT_EQ(checkedMulAdd<int64_t>(10, 2, 3), std::optional<int64_t>(23));
}
TEST(CheckedArithmetic, CheckedMulSmall) {
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), std::nullopt);
EXPECT_EQ(checkedMul<int16_t>(Max, Max), std::nullopt);
EXPECT_EQ(checkedMul<int16_t>(Min, 2), std::nullopt);
EXPECT_EQ(checkedMul<int16_t>(10, 2), std::optional<int16_t>(20));
}
TEST(CheckedArithmetic, CheckedMulAddSmall) {
const int16_t Max = std::numeric_limits<int16_t>::max();
const int16_t Min = std::numeric_limits<int16_t>::min();
EXPECT_EQ(checkedMulAdd<int16_t>(Max, 1, 2), std::nullopt);
EXPECT_EQ(checkedMulAdd<int16_t>(1, 1, Max), std::nullopt);
EXPECT_EQ(checkedMulAdd<int16_t>(1, -1, Min), std::nullopt);
EXPECT_EQ(checkedMulAdd<int16_t>(10, 2, 3), std::optional<int16_t>(23));
}
TEST(CheckedArithmetic, CheckedAddUnsigned) {
const uint64_t Max = std::numeric_limits<uint64_t>::max();
EXPECT_EQ(checkedAddUnsigned<uint64_t>(Max, Max), std::nullopt);
EXPECT_EQ(checkedAddUnsigned<uint64_t>(Max, 1), std::nullopt);
EXPECT_EQ(checkedAddUnsigned<uint64_t>(10, 1), std::optional<uint64_t>(11));
}
TEST(CheckedArithmetic, CheckedMulUnsigned) {
const uint64_t Max = std::numeric_limits<uint64_t>::max();
EXPECT_EQ(checkedMulUnsigned<uint64_t>(Max, 2), std::nullopt);
EXPECT_EQ(checkedMulUnsigned<uint64_t>(Max, Max), std::nullopt);
EXPECT_EQ(checkedMulUnsigned<uint64_t>(10, 2), std::optional<uint64_t>(20));
}
TEST(CheckedArithmetic, CheckedMulAddUnsigned) {
const uint64_t Max = std::numeric_limits<uint64_t>::max();
EXPECT_EQ(checkedMulAddUnsigned<uint64_t>(Max, 1, 2), std::nullopt);
EXPECT_EQ(checkedMulAddUnsigned<uint64_t>(1, 1, Max), std::nullopt);
EXPECT_EQ(checkedMulAddUnsigned<uint64_t>(10, 2, 3), std::optional<uint64_t>(23));
}
} // namespace
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