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This CL moves sem/type and copies sem/node into the type/ folder. The type subclasses are moved over to using type::Type while remaining in the sem:: namespace. They will be moved over in followup CLs. Bug: tint:1718 Change-Id: I3f3495328d734f88e4fc2dfbc6705343f1198dc5 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/113180 Reviewed-by: Ben Clayton <bclayton@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
159 lines
5.6 KiB
C++
159 lines
5.6 KiB
C++
// Copyright 2021 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_TINT_SEM_INFO_H_
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#define SRC_TINT_SEM_INFO_H_
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#include <algorithm>
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#include <type_traits>
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#include <unordered_map>
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#include <vector>
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#include "src/tint/ast/node.h"
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#include "src/tint/debug.h"
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#include "src/tint/sem/node.h"
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#include "src/tint/sem/type_mappings.h"
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#include "src/tint/utils/unique_vector.h"
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// Forward declarations
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namespace tint::sem {
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class Module;
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} // namespace tint::sem
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namespace tint::type {
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class Node;
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class Type;
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} // namespace tint::type
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namespace tint::sem {
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/// Info holds all the resolved semantic information for a Program.
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class Info {
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public:
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/// Placeholder type used by Get() to provide a default value for EXPLICIT_SEM
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using InferFromAST = std::nullptr_t;
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/// Resolves to the return type of the Get() method given the desired semantic
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/// type and AST type.
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template <typename SEM, typename AST>
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using GetResultType =
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std::conditional_t<std::is_same<SEM, InferFromAST>::value, SemanticNodeTypeFor<AST>, SEM>;
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/// Alias to a unique vector of transitively referenced global variables
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using TransitivelyReferenced = utils::UniqueVector<const GlobalVariable*, 4>;
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/// Constructor
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Info();
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/// Move constructor
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Info(Info&&);
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/// Destructor
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~Info();
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/// Move assignment operator
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/// @param rhs the Program to move
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/// @return this Program
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Info& operator=(Info&& rhs);
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/// @param highest_node_id the last allocated (numerically highest) AST node identifier.
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void Reserve(ast::NodeID highest_node_id) {
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nodes_.resize(std::max(highest_node_id.value + 1, nodes_.size()));
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}
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/// Get looks up the semantic information for the AST node `ast_node`.
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/// @param ast_node the AST node
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/// @returns a pointer to the semantic node if found, otherwise nullptr
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template <typename SEM = InferFromAST,
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typename AST = CastableBase,
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typename RESULT = GetResultType<SEM, AST>>
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const RESULT* Get(const AST* ast_node) const {
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if (ast_node && ast_node->node_id.value < nodes_.size()) {
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return As<RESULT>(nodes_[ast_node->node_id.value]);
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}
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return nullptr;
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}
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/// Add registers the semantic node `sem_node` for the AST node `ast_node`.
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/// @param ast_node the AST node
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/// @param sem_node the semantic node
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template <typename AST>
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void Add(const AST* ast_node, const SemanticNodeTypeFor<AST>* sem_node) {
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Reserve(ast_node->node_id);
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// Check there's no semantic info already existing for the AST node
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TINT_ASSERT(Semantic, nodes_[ast_node->node_id.value] == nullptr);
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nodes_[ast_node->node_id.value] = sem_node;
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}
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/// Replace replaces any existing semantic node `sem_node` for the AST node `ast_node`.
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/// @param ast_node the AST node
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/// @param sem_node the new semantic node
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template <typename AST>
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void Replace(const AST* ast_node, const SemanticNodeTypeFor<AST>* sem_node) {
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Reserve(ast_node->node_id);
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nodes_[ast_node->node_id.value] = sem_node;
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}
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/// Wrap returns a new Info created with the contents of `inner`.
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/// The Info returned by Wrap is intended to temporarily extend the contents
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/// of an existing immutable Info.
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/// As the copied contents are owned by `inner`, `inner` must not be
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/// destructed or assigned while using the returned Info.
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/// @param inner the immutable Info to extend
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/// @return the Info that wraps `inner`
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static Info Wrap(const Info& inner) {
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Info out;
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out.nodes_ = inner.nodes_;
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out.module_ = inner.module_;
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return out;
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}
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/// Assigns the semantic module.
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/// @param module the module to assign.
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void SetModule(sem::Module* module) { module_ = module; }
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/// @returns the semantic module.
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const sem::Module* Module() const { return module_; }
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/// Records that this variable (transitively) references the given override variable.
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/// @param from the item the variable is referenced from
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/// @param var the module-scope override variable
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void AddTransitivelyReferencedOverride(const CastableBase* from, const GlobalVariable* var) {
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if (referenced_overrides_.count(from) == 0) {
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referenced_overrides_.insert({from, TransitivelyReferenced{}});
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}
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referenced_overrides_[from].Add(var);
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}
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/// @param from the key to look up
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/// @returns all transitively referenced override variables or nullptr if none set
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const TransitivelyReferenced* TransitivelyReferencedOverrides(const CastableBase* from) const {
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if (referenced_overrides_.count(from) == 0) {
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return nullptr;
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}
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return &referenced_overrides_.at(from);
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}
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private:
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// AST node index to semantic node
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std::vector<const CastableBase*> nodes_;
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// Lists transitively referenced overrides for the given item
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std::unordered_map<const CastableBase*, TransitivelyReferenced> referenced_overrides_;
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// The semantic module
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sem::Module* module_ = nullptr;
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};
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} // namespace tint::sem
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#endif // SRC_TINT_SEM_INFO_H_
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