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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;
struct Success {
Value value;
};
struct Failure {
builder::CreatePtrs create_ptrs;
};
utils::Result<Success, Failure> expected;
};
static std::ostream& operator<<(std::ostream& o, const Case& c) {
o << "input: " << c.input;
if (c.expected) {
o << ", expected: " << c.expected.Get().value;
} else {
o << ", expected failed bitcast to " << c.expected.Failure().create_ptrs;
}
return o;
}
template <typename TO, typename FROM>
Case Success(FROM input, TO expected) {
return Case{input, Case::Success{expected}};
}
template <typename TO, typename FROM>
Case Failure(FROM input) {
return Case{input, Case::Failure{builder::CreatePtrsFor<TO>()}};
}
using ResolverConstEvalBitcastTest = ResolverTestWithParam<Case>;
TEST_P(ResolverConstEvalBitcastTest, Test) {
const auto& input = GetParam().input;
const auto& expected = GetParam().expected;
// Get the target type CreatePtrs
builder::CreatePtrs target_create_ptrs;
if (expected) {
target_create_ptrs = expected.Get().value.create_ptrs;
} else {
target_create_ptrs = expected.Failure().create_ptrs;
}
auto* target_ty = target_create_ptrs.ast(*this);
ASSERT_NE(target_ty, nullptr);
auto* input_val = input.Expr(*this);
const ast::Expression* expr = Bitcast(Source{{12, 34}}, target_ty, input_val);
WrapInFunction(expr);
auto* target_sem_ty = target_create_ptrs.sem(*this);
if (expected) {
EXPECT_TRUE(r()->Resolve()) << r()->error();
auto* sem = Sem().Get(expr);
ASSERT_NE(sem, nullptr);
EXPECT_TYPE(sem->Type(), target_sem_ty);
ASSERT_NE(sem->ConstantValue(), nullptr);
EXPECT_TYPE(sem->ConstantValue()->Type(), target_sem_ty);
auto expected_values = expected.Get().value.args;
auto got_values = ScalarsFrom(sem->ConstantValue());
EXPECT_EQ(expected_values, got_values);
} else {
ASSERT_FALSE(r()->Resolve());
EXPECT_THAT(r()->error(), testing::StartsWith("12:34 error:"));
EXPECT_THAT(r()->error(), testing::HasSubstr("cannot be represented as"));
}
}
const u32 nan_as_u32 = utils::Bitcast<u32>(std::numeric_limits<float>::quiet_NaN());
const i32 nan_as_i32 = utils::Bitcast<i32>(std::numeric_limits<float>::quiet_NaN());
const u32 inf_as_u32 = utils::Bitcast<u32>(std::numeric_limits<float>::infinity());
const i32 inf_as_i32 = utils::Bitcast<i32>(std::numeric_limits<float>::infinity());
const u32 neg_inf_as_u32 = utils::Bitcast<u32>(-std::numeric_limits<float>::infinity());
const i32 neg_inf_as_i32 = utils::Bitcast<i32>(-std::numeric_limits<float>::infinity());
INSTANTIATE_TEST_SUITE_P(Bitcast,
ResolverConstEvalBitcastTest,
testing::ValuesIn({
// Bitcast to same (concrete) type, no change
Success(Val(0_u), Val(0_u)), //
Success(Val(0_i), Val(0_i)), //
Success(Val(0_f), Val(0_f)), //
Success(Val(123_u), Val(123_u)), //
Success(Val(123_i), Val(123_i)), //
Success(Val(123.456_f), Val(123.456_f)), //
Success(Val(u32::Highest()), Val(u32::Highest())), //
Success(Val(u32::Lowest()), Val(u32::Lowest())), //
Success(Val(i32::Highest()), Val(i32::Highest())), //
Success(Val(i32::Lowest()), Val(i32::Lowest())), //
Success(Val(f32::Highest()), Val(f32::Highest())), //
Success(Val(f32::Lowest()), Val(f32::Lowest())), //
// Bitcast to different type
Success(Val(0_u), Val(0_i)), //
Success(Val(0_u), Val(0_f)), //
Success(Val(0_i), Val(0_u)), //
Success(Val(0_i), Val(0_f)), //
Success(Val(0.0_f), Val(0_i)), //
Success(Val(0.0_f), Val(0_u)), //
Success(Val(1_u), Val(1_i)), //
Success(Val(1_u), Val(1.4013e-45_f)), //
Success(Val(1_i), Val(1_u)), //
Success(Val(1_i), Val(1.4013e-45_f)), //
Success(Val(1.0_f), Val(0x3F800000_u)), //
Success(Val(1.0_f), Val(0x3F800000_i)), //
Success(Val(123_u), Val(123_i)), //
Success(Val(123_u), Val(1.7236e-43_f)), //
Success(Val(123_i), Val(123_u)), //
Success(Val(123_i), Val(1.7236e-43_f)), //
Success(Val(123.0_f), Val(0x42F60000_u)), //
Success(Val(123.0_f), Val(0x42F60000_i)), //
// Bitcast from abstract materializes lhs first,
// so same results as above.
Success(Val(0_a), Val(0_i)), //
Success(Val(0_a), Val(0_f)), //
Success(Val(0_a), Val(0_u)), //
Success(Val(0_a), Val(0_f)), //
Success(Val(0_a), Val(0_i)), //
Success(Val(0_a), Val(0_u)), //
Success(Val(1_a), Val(1_i)), //
Success(Val(1_a), Val(1.4013e-45_f)), //
Success(Val(1_a), Val(1_u)), //
Success(Val(1_a), Val(1.4013e-45_f)), //
Success(Val(1.0_a), Val(0x3F800000_u)), //
Success(Val(1.0_a), Val(0x3F800000_i)), //
Success(Val(123_a), Val(123_i)), //
Success(Val(123_a), Val(1.7236e-43_f)), //
Success(Val(123_a), Val(123_u)), //
Success(Val(123_a), Val(1.7236e-43_f)), //
Success(Val(123.0_a), Val(0x42F60000_u)), //
Success(Val(123.0_a), Val(0x42F60000_i)), //
// u32 <-> i32 sign bit
Success(Val(0xFFFFFFFF_u), Val(-1_i)), //
Success(Val(-1_i), Val(0xFFFFFFFF_u)), //
Success(Val(0x80000000_u), Val(i32::Lowest())), //
Success(Val(i32::Lowest()), Val(0x80000000_u)), //
// Vector tests
Success(Vec(0_u, 1_u, 123_u), Vec(0_i, 1_i, 123_i)),
Success(Vec(0.0_f, 1.0_f, 123.0_f),
Vec(0_i, 0x3F800000_i, 0x42F60000_i)),
// Unrepresentable
Failure<f32>(Val(nan_as_u32)), //
Failure<f32>(Val(nan_as_i32)), //
Failure<f32>(Val(inf_as_u32)), //
Failure<f32>(Val(inf_as_i32)), //
Failure<f32>(Val(neg_inf_as_u32)), //
Failure<f32>(Val(neg_inf_as_i32)), //
Failure<builder::vec2<f32>>(Vec(nan_as_u32, 0_u)), //
Failure<builder::vec2<f32>>(Vec(nan_as_i32, 0_i)), //
Failure<builder::vec2<f32>>(Vec(inf_as_u32, 0_u)), //
Failure<builder::vec2<f32>>(Vec(inf_as_i32, 0_i)), //
Failure<builder::vec2<f32>>(Vec(neg_inf_as_u32, 0_u)), //
Failure<builder::vec2<f32>>(Vec(neg_inf_as_i32, 0_i)), //
Failure<builder::vec2<f32>>(Vec(0_u, nan_as_u32)), //
Failure<builder::vec2<f32>>(Vec(0_i, nan_as_i32)), //
Failure<builder::vec2<f32>>(Vec(0_u, inf_as_u32)), //
Failure<builder::vec2<f32>>(Vec(0_i, inf_as_i32)), //
Failure<builder::vec2<f32>>(Vec(0_u, neg_inf_as_u32)), //
Failure<builder::vec2<f32>>(Vec(0_i, neg_inf_as_i32)), //
}));
} // namespace
} // namespace tint::resolver