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// Copyright 2022 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/resolver/const_eval_test.h"
using namespace tint::number_suffixes; // NOLINT
namespace tint::resolver {
namespace {
struct Case {
Value input;
Value expected;
};
static std::ostream& operator<<(std::ostream& o, const Case& c) {
o << "input: " << c.input << ", expected: " << c.expected;
return o;
}
// Creates a Case with Values of any type
Case C(Value input, Value expected) {
return Case{std::move(input), std::move(expected)};
}
/// Convenience overload to creates a Case with just scalars
template <typename T, typename U, typename = std::enable_if_t<!IsValue<T>>>
Case C(T input, U expected) {
return Case{Val(input), Val(expected)};
}
using ResolverConstEvalUnaryOpTest = ResolverTestWithParam<std::tuple<ast::UnaryOp, Case>>;
TEST_P(ResolverConstEvalUnaryOpTest, Test) {
Enable(ast::Extension::kF16);
auto op = std::get<0>(GetParam());
auto& c = std::get<1>(GetParam());
auto& expected = c.expected;
auto& input = c.input;
auto* input_expr = input.Expr(*this);
auto* expr = create<ast::UnaryOpExpression>(op, input_expr);
GlobalConst("C", expr);
ASSERT_TRUE(r()->Resolve()) << r()->error();
auto* sem = Sem().Get(expr);
const constant::Value* value = sem->ConstantValue();
ASSERT_NE(value, nullptr);
EXPECT_TYPE(value->Type(), sem->Type());
auto values_flat = ScalarsFrom(value);
auto expected_values_flat = expected.args;
ASSERT_EQ(values_flat.Length(), expected_values_flat.Length());
for (size_t i = 0; i < values_flat.Length(); ++i) {
auto& a = values_flat[i];
auto& b = expected_values_flat[i];
EXPECT_EQ(a, b);
if (expected.is_integral) {
// Check that the constant's integer doesn't contain unexpected
// data in the MSBs that are outside of the bit-width of T.
EXPECT_EQ(builder::As<AInt>(a), builder::As<AInt>(b));
}
}
}
INSTANTIATE_TEST_SUITE_P(Complement,
ResolverConstEvalUnaryOpTest,
testing::Combine(testing::Values(ast::UnaryOp::kComplement),
testing::ValuesIn({
// AInt
C(0_a, 0xffffffffffffffff_a),
C(0xffffffffffffffff_a, 0_a),
C(0xf0f0f0f0f0f0f0f0_a, 0x0f0f0f0f0f0f0f0f_a),
C(0xaaaaaaaaaaaaaaaa_a, 0x5555555555555555_a),
C(0x5555555555555555_a, 0xaaaaaaaaaaaaaaaa_a),
// u32
C(0_u, 0xffffffff_u),
C(0xffffffff_u, 0_u),
C(0xf0f0f0f0_u, 0x0f0f0f0f_u),
C(0xaaaaaaaa_u, 0x55555555_u),
C(0x55555555_u, 0xaaaaaaaa_u),
// i32
C(0_i, -1_i),
C(-1_i, 0_i),
C(1_i, -2_i),
C(-2_i, 1_i),
C(2_i, -3_i),
C(-3_i, 2_i),
})));
INSTANTIATE_TEST_SUITE_P(Negation,
ResolverConstEvalUnaryOpTest,
testing::Combine(testing::Values(ast::UnaryOp::kNegation),
testing::ValuesIn({
// AInt
C(0_a, -0_a),
C(-0_a, 0_a),
C(1_a, -1_a),
C(-1_a, 1_a),
C(AInt::Highest(), -AInt::Highest()),
C(-AInt::Highest(), AInt::Highest()),
C(AInt::Lowest(), Negate(AInt::Lowest())),
C(Negate(AInt::Lowest()), AInt::Lowest()),
// i32
C(0_i, -0_i),
C(-0_i, 0_i),
C(1_i, -1_i),
C(-1_i, 1_i),
C(i32::Highest(), -i32::Highest()),
C(-i32::Highest(), i32::Highest()),
C(i32::Lowest(), Negate(i32::Lowest())),
C(Negate(i32::Lowest()), i32::Lowest()),
// AFloat
C(0.0_a, -0.0_a),
C(-0.0_a, 0.0_a),
C(1.0_a, -1.0_a),
C(-1.0_a, 1.0_a),
C(AFloat::Highest(), -AFloat::Highest()),
C(-AFloat::Highest(), AFloat::Highest()),
C(AFloat::Lowest(), Negate(AFloat::Lowest())),
C(Negate(AFloat::Lowest()), AFloat::Lowest()),
// f32
C(0.0_f, -0.0_f),
C(-0.0_f, 0.0_f),
C(1.0_f, -1.0_f),
C(-1.0_f, 1.0_f),
C(f32::Highest(), -f32::Highest()),
C(-f32::Highest(), f32::Highest()),
C(f32::Lowest(), Negate(f32::Lowest())),
C(Negate(f32::Lowest()), f32::Lowest()),
// f16
C(0.0_h, -0.0_h),
C(-0.0_h, 0.0_h),
C(1.0_h, -1.0_h),
C(-1.0_h, 1.0_h),
C(f16::Highest(), -f16::Highest()),
C(-f16::Highest(), f16::Highest()),
C(f16::Lowest(), Negate(f16::Lowest())),
C(Negate(f16::Lowest()), f16::Lowest()),
})));
// Make sure UBSan doesn't trip on C++'s undefined behaviour of negating the smallest negative
// number.
TEST_F(ResolverConstEvalTest, UnaryNegateLowestAbstract) {
// const break_me = -(-9223372036854775808);
auto* c = GlobalConst("break_me", Negation(Negation(Expr(9223372036854775808_a))));
(void)c;
EXPECT_TRUE(r()->Resolve()) << r()->error();
auto* sem = Sem().Get(c);
EXPECT_EQ(sem->ConstantValue()->ValueAs<AInt>(), 9223372036854775808_a);
}
INSTANTIATE_TEST_SUITE_P(Not,
ResolverConstEvalUnaryOpTest,
testing::Combine(testing::Values(ast::UnaryOp::kNot),
testing::ValuesIn({
C(true, false),
C(false, true),
C(Vec(true, true), Vec(false, false)),
C(Vec(true, false), Vec(false, true)),
C(Vec(false, true), Vec(true, false)),
C(Vec(false, false), Vec(true, true)),
})));
} // namespace
} // namespace tint::resolver