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// Copyright 2021 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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#include "src/tint/lang/wgsl/sem/function.h"
#include "src/tint/lang/core/type/depth_texture.h"
#include "src/tint/lang/core/type/external_texture.h"
#include "src/tint/lang/core/type/multisampled_texture.h"
#include "src/tint/lang/core/type/sampled_texture.h"
#include "src/tint/lang/core/type/storage_texture.h"
#include "src/tint/lang/wgsl/ast/function.h"
#include "src/tint/lang/wgsl/ast/identifier.h"
#include "src/tint/lang/wgsl/ast/must_use_attribute.h"
#include "src/tint/lang/wgsl/sem/variable.h"
#include "src/tint/utils/containers/transform.h"
TINT_INSTANTIATE_TYPEINFO(tint::sem::Function);
namespace tint::sem {
Function::Function(const ast::Function* declaration)
: Base(core::EvaluationStage::kRuntime,
ast::HasAttribute<ast::MustUseAttribute>(declaration->attributes)),
declaration_(declaration),
workgroup_size_{1, 1, 1} {}
Function::~Function() = default;
std::vector<std::pair<const Variable*, const ast::LocationAttribute*>>
Function::TransitivelyReferencedLocationVariables() const {
std::vector<std::pair<const Variable*, const ast::LocationAttribute*>> ret;
for (auto* global : TransitivelyReferencedGlobals()) {
for (auto* attr : global->Declaration()->attributes) {
if (auto* location = attr->As<ast::LocationAttribute>()) {
ret.push_back({global, location});
break;
}
}
}
return ret;
}
void Function::AddTransitivelyReferencedGlobal(const sem::GlobalVariable* global) {
if (transitively_referenced_globals_.Add(global)) {
for (auto* ref : global->TransitivelyReferencedOverrides()) {
AddTransitivelyReferencedGlobal(ref);
}
}
}
Function::VariableBindings Function::TransitivelyReferencedUniformVariables() const {
VariableBindings ret;
for (auto* global : TransitivelyReferencedGlobals()) {
if (global->AddressSpace() != core::AddressSpace::kUniform) {
continue;
}
if (auto bp = global->Attributes().binding_point) {
ret.push_back({global, *bp});
}
}
return ret;
}
Function::VariableBindings Function::TransitivelyReferencedStorageBufferVariables() const {
VariableBindings ret;
for (auto* global : TransitivelyReferencedGlobals()) {
if (global->AddressSpace() != core::AddressSpace::kStorage) {
continue;
}
if (auto bp = global->Attributes().binding_point) {
ret.push_back({global, *bp});
}
}
return ret;
}
std::vector<std::pair<const Variable*, const ast::BuiltinAttribute*>>
Function::TransitivelyReferencedBuiltinVariables() const {
std::vector<std::pair<const Variable*, const ast::BuiltinAttribute*>> ret;
for (auto* global : TransitivelyReferencedGlobals()) {
for (auto* attr : global->Declaration()->attributes) {
if (auto* builtin = attr->As<ast::BuiltinAttribute>()) {
ret.push_back({global, builtin});
break;
}
}
}
return ret;
}
Function::VariableBindings Function::TransitivelyReferencedSamplerVariables() const {
return TransitivelyReferencedSamplerVariablesImpl(core::type::SamplerKind::kSampler);
}
Function::VariableBindings Function::TransitivelyReferencedComparisonSamplerVariables() const {
return TransitivelyReferencedSamplerVariablesImpl(core::type::SamplerKind::kComparisonSampler);
}
Function::VariableBindings Function::TransitivelyReferencedSampledTextureVariables() const {
return TransitivelyReferencedSampledTextureVariablesImpl(false);
}
Function::VariableBindings Function::TransitivelyReferencedMultisampledTextureVariables() const {
return TransitivelyReferencedSampledTextureVariablesImpl(true);
}
Function::VariableBindings Function::TransitivelyReferencedVariablesOfType(
const tint::TypeInfo* type) const {
VariableBindings ret;
for (auto* global : TransitivelyReferencedGlobals()) {
auto* unwrapped_type = global->Type()->UnwrapRef();
if (unwrapped_type->TypeInfo().Is(type)) {
if (auto bp = global->Attributes().binding_point) {
ret.push_back({global, *bp});
}
}
}
return ret;
}
bool Function::HasAncestorEntryPoint(Symbol symbol) const {
for (const auto* point : ancestor_entry_points_) {
if (point->Declaration()->name->symbol == symbol) {
return true;
}
}
return false;
}
Function::VariableBindings Function::TransitivelyReferencedSamplerVariablesImpl(
core::type::SamplerKind kind) const {
VariableBindings ret;
for (auto* global : TransitivelyReferencedGlobals()) {
auto* unwrapped_type = global->Type()->UnwrapRef();
auto* sampler = unwrapped_type->As<core::type::Sampler>();
if (sampler == nullptr || sampler->kind() != kind) {
continue;
}
if (auto bp = global->Attributes().binding_point) {
ret.push_back({global, *bp});
}
}
return ret;
}
Function::VariableBindings Function::TransitivelyReferencedSampledTextureVariablesImpl(
bool multisampled) const {
VariableBindings ret;
for (auto* global : TransitivelyReferencedGlobals()) {
auto* unwrapped_type = global->Type()->UnwrapRef();
auto* texture = unwrapped_type->As<core::type::Texture>();
if (texture == nullptr) {
continue;
}
auto is_multisampled = texture->Is<core::type::MultisampledTexture>();
auto is_sampled = texture->Is<core::type::SampledTexture>();
if ((multisampled && !is_multisampled) || (!multisampled && !is_sampled)) {
continue;
}
if (auto bp = global->Attributes().binding_point) {
ret.push_back({global, *bp});
}
}
return ret;
}
} // namespace tint::sem