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// Copyright 2021 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/lang/core/type/reference.h"
#include "src/tint/lang/wgsl/resolver/resolver.h"
#include "src/tint/lang/wgsl/resolver/resolver_helper_test.h"
#include "src/tint/lang/wgsl/sem/load.h"
#include "gmock/gmock.h"
namespace tint::resolver {
namespace {
using namespace tint::core::number_suffixes; // NOLINT
struct ResolverPtrRefTest : public resolver::TestHelper, public testing::Test {};
TEST_F(ResolverPtrRefTest, AddressOf) {
// var v : i32;
// &v
auto* v = Var("v", ty.i32());
auto* expr = AddressOf(v);
WrapInFunction(v, expr);
EXPECT_TRUE(r()->Resolve()) << r()->error();
ASSERT_TRUE(TypeOf(expr)->Is<core::type::Pointer>());
EXPECT_TRUE(TypeOf(expr)->As<core::type::Pointer>()->StoreType()->Is<core::type::I32>());
EXPECT_EQ(TypeOf(expr)->As<core::type::Pointer>()->AddressSpace(),
core::AddressSpace::kFunction);
}
TEST_F(ResolverPtrRefTest, AddressOfThenDeref) {
// var v : i32;
// *(&v)
auto* v = Var("v", ty.i32());
auto* expr = Deref(AddressOf(v));
WrapInFunction(v, expr);
EXPECT_TRUE(r()->Resolve()) << r()->error();
auto* load = Sem().Get<sem::Load>(expr);
ASSERT_NE(load, nullptr);
auto* ref = load->Reference();
ASSERT_NE(ref, nullptr);
ASSERT_TRUE(ref->Type()->Is<core::type::Reference>());
EXPECT_TRUE(ref->Type()->As<core::type::Reference>()->StoreType()->Is<core::type::I32>());
}
TEST_F(ResolverPtrRefTest, DefaultPtrAddressSpace) {
// https://gpuweb.github.io/gpuweb/wgsl/#storage-class
auto* buf = Structure("S", Vector{Member("m", ty.i32())});
auto* function = Var("f", ty.i32());
auto* private_ = GlobalVar("p", ty.i32(), core::AddressSpace::kPrivate);
auto* workgroup = GlobalVar("w", ty.i32(), core::AddressSpace::kWorkgroup);
auto* uniform =
GlobalVar("ub", ty.Of(buf), core::AddressSpace::kUniform, Binding(0_a), Group(0_a));
auto* storage =
GlobalVar("sb", ty.Of(buf), core::AddressSpace::kStorage, Binding(1_a), Group(0_a));
auto* function_ptr =
Let("f_ptr", ty.ptr(core::AddressSpace::kFunction, ty.i32()), AddressOf(function));
auto* private_ptr =
Let("p_ptr", ty.ptr(core::AddressSpace::kPrivate, ty.i32()), AddressOf(private_));
auto* workgroup_ptr =
Let("w_ptr", ty.ptr(core::AddressSpace::kWorkgroup, ty.i32()), AddressOf(workgroup));
auto* uniform_ptr =
Let("ub_ptr", ty.ptr(core::AddressSpace::kUniform, ty.Of(buf)), AddressOf(uniform));
auto* storage_ptr =
Let("sb_ptr", ty.ptr(core::AddressSpace::kStorage, ty.Of(buf)), AddressOf(storage));
WrapInFunction(function, function_ptr, private_ptr, workgroup_ptr, uniform_ptr, storage_ptr);
ASSERT_TRUE(r()->Resolve()) << r()->error();
ASSERT_TRUE(TypeOf(function_ptr)->Is<core::type::Pointer>())
<< "function_ptr is " << TypeOf(function_ptr)->TypeInfo().name;
ASSERT_TRUE(TypeOf(private_ptr)->Is<core::type::Pointer>())
<< "private_ptr is " << TypeOf(private_ptr)->TypeInfo().name;
ASSERT_TRUE(TypeOf(workgroup_ptr)->Is<core::type::Pointer>())
<< "workgroup_ptr is " << TypeOf(workgroup_ptr)->TypeInfo().name;
ASSERT_TRUE(TypeOf(uniform_ptr)->Is<core::type::Pointer>())
<< "uniform_ptr is " << TypeOf(uniform_ptr)->TypeInfo().name;
ASSERT_TRUE(TypeOf(storage_ptr)->Is<core::type::Pointer>())
<< "storage_ptr is " << TypeOf(storage_ptr)->TypeInfo().name;
EXPECT_EQ(TypeOf(function_ptr)->As<core::type::Pointer>()->Access(), core::Access::kReadWrite);
EXPECT_EQ(TypeOf(private_ptr)->As<core::type::Pointer>()->Access(), core::Access::kReadWrite);
EXPECT_EQ(TypeOf(workgroup_ptr)->As<core::type::Pointer>()->Access(), core::Access::kReadWrite);
EXPECT_EQ(TypeOf(uniform_ptr)->As<core::type::Pointer>()->Access(), core::Access::kRead);
EXPECT_EQ(TypeOf(storage_ptr)->As<core::type::Pointer>()->Access(), core::Access::kRead);
}
} // namespace
} // namespace tint::resolver