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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/sem/function.h"
#include "src/ast/function.h"
#include "src/sem/depth_texture_type.h"
#include "src/sem/external_texture_type.h"
#include "src/sem/multisampled_texture_type.h"
#include "src/sem/sampled_texture_type.h"
#include "src/sem/storage_texture_type.h"
#include "src/sem/variable.h"
TINT_INSTANTIATE_TYPEINFO(tint::sem::Function);
namespace tint {
namespace sem {
namespace {
ParameterList GetParameters(const std::vector<const Variable*>& params) {
ParameterList parameters;
parameters.reserve(params.size());
for (auto* param : params) {
parameters.emplace_back(Parameter{param->Type(), ParameterUsage::kNone});
}
return parameters;
}
} // namespace
Function::Function(ast::Function* declaration,
Type* return_type,
std::vector<const Variable*> parameters,
std::vector<const Variable*> referenced_module_vars,
std::vector<const Variable*> local_referenced_module_vars,
std::vector<const ast::ReturnStatement*> return_statements,
std::vector<const ast::CallExpression*> callsites,
std::vector<Symbol> ancestor_entry_points,
std::array<WorkgroupDimension, 3> workgroup_size)
: Base(return_type, GetParameters(parameters)),
declaration_(declaration),
parameters_(std::move(parameters)),
referenced_module_vars_(std::move(referenced_module_vars)),
local_referenced_module_vars_(std::move(local_referenced_module_vars)),
return_statements_(std::move(return_statements)),
callsites_(callsites),
ancestor_entry_points_(std::move(ancestor_entry_points)),
workgroup_size_(std::move(workgroup_size)) {}
Function::~Function() = default;
std::vector<std::pair<const Variable*, ast::LocationDecoration*>>
Function::ReferencedLocationVariables() const {
std::vector<std::pair<const Variable*, ast::LocationDecoration*>> ret;
for (auto* var : ReferencedModuleVariables()) {
for (auto* deco : var->Declaration()->decorations()) {
if (auto* location = deco->As<ast::LocationDecoration>()) {
ret.push_back({var, location});
break;
}
}
}
return ret;
}
Function::VariableBindings Function::ReferencedUniformVariables() const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
if (var->StorageClass() != ast::StorageClass::kUniform) {
continue;
}
if (auto binding_point = var->Declaration()->binding_point()) {
ret.push_back({var, binding_point});
}
}
return ret;
}
Function::VariableBindings Function::ReferencedStorageBufferVariables() const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
if (var->StorageClass() != ast::StorageClass::kStorage) {
continue;
}
if (auto binding_point = var->Declaration()->binding_point()) {
ret.push_back({var, binding_point});
}
}
return ret;
}
std::vector<std::pair<const Variable*, ast::BuiltinDecoration*>>
Function::ReferencedBuiltinVariables() const {
std::vector<std::pair<const Variable*, ast::BuiltinDecoration*>> ret;
for (auto* var : ReferencedModuleVariables()) {
for (auto* deco : var->Declaration()->decorations()) {
if (auto* builtin = deco->As<ast::BuiltinDecoration>()) {
ret.push_back({var, builtin});
break;
}
}
}
return ret;
}
Function::VariableBindings Function::ReferencedSamplerVariables() const {
return ReferencedSamplerVariablesImpl(ast::SamplerKind::kSampler);
}
Function::VariableBindings Function::ReferencedComparisonSamplerVariables()
const {
return ReferencedSamplerVariablesImpl(ast::SamplerKind::kComparisonSampler);
}
Function::VariableBindings Function::ReferencedSampledTextureVariables() const {
return ReferencedSampledTextureVariablesImpl(false);
}
Function::VariableBindings Function::ReferencedMultisampledTextureVariables()
const {
return ReferencedSampledTextureVariablesImpl(true);
}
Function::VariableBindings Function::ReferencedStorageTextureVariables() const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type = var->Type()->UnwrapRef();
auto* storage_texture = unwrapped_type->As<sem::StorageTexture>();
if (storage_texture == nullptr) {
continue;
}
if (auto binding_point = var->Declaration()->binding_point()) {
ret.push_back({var, binding_point});
}
}
return ret;
}
Function::VariableBindings Function::ReferencedDepthTextureVariables() const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type = var->Type()->UnwrapRef();
auto* storage_texture = unwrapped_type->As<sem::DepthTexture>();
if (storage_texture == nullptr) {
continue;
}
if (auto binding_point = var->Declaration()->binding_point()) {
ret.push_back({var, binding_point});
}
}
return ret;
}
Function::VariableBindings Function::ReferencedExternalTextureVariables()
const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type = var->Type()->UnwrapRef();
auto* external_texture = unwrapped_type->As<sem::ExternalTexture>();
if (external_texture == nullptr) {
continue;
}
if (auto binding_point = var->Declaration()->binding_point()) {
ret.push_back({var, binding_point});
}
}
return ret;
}
bool Function::HasAncestorEntryPoint(Symbol symbol) const {
for (const auto& point : ancestor_entry_points_) {
if (point == symbol) {
return true;
}
}
return false;
}
Function::VariableBindings Function::ReferencedSamplerVariablesImpl(
ast::SamplerKind kind) const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type = var->Type()->UnwrapRef();
auto* sampler = unwrapped_type->As<sem::Sampler>();
if (sampler == nullptr || sampler->kind() != kind) {
continue;
}
if (auto binding_point = var->Declaration()->binding_point()) {
ret.push_back({var, binding_point});
}
}
return ret;
}
Function::VariableBindings Function::ReferencedSampledTextureVariablesImpl(
bool multisampled) const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type = var->Type()->UnwrapRef();
auto* texture = unwrapped_type->As<sem::Texture>();
if (texture == nullptr) {
continue;
}
auto is_multisampled = texture->Is<sem::MultisampledTexture>();
auto is_sampled = texture->Is<sem::SampledTexture>();
if ((multisampled && !is_multisampled) || (!multisampled && !is_sampled)) {
continue;
}
if (auto binding_point = var->Declaration()->binding_point()) {
ret.push_back({var, binding_point});
}
}
return ret;
}
} // namespace sem
} // namespace tint