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b5599d35f9
This PR condenses the namespaces in the tint/transform folder. Change-Id: Idf448870ccf90f892b9186f7aab7bb0ac9deda17 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86029 Auto-Submit: Dan Sinclair <dsinclair@chromium.org> Reviewed-by: Ben Clayton <bclayton@google.com> Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
98 lines
3.0 KiB
C++
98 lines
3.0 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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#include "src/tint/transform/unshadow.h"
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#include <memory>
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#include <unordered_map>
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#include <utility>
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#include "src/tint/program_builder.h"
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#include "src/tint/sem/block_statement.h"
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#include "src/tint/sem/function.h"
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#include "src/tint/sem/statement.h"
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#include "src/tint/sem/variable.h"
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TINT_INSTANTIATE_TYPEINFO(tint::transform::Unshadow);
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namespace tint::transform {
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/// The PIMPL state for the Unshadow transform
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struct Unshadow::State {
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/// The clone context
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CloneContext& ctx;
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/// Constructor
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/// @param context the clone context
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explicit State(CloneContext& context) : ctx(context) {}
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/// Performs the transformation
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void Run() {
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auto& sem = ctx.src->Sem();
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// Maps a variable to its new name.
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std::unordered_map<const sem::Variable*, Symbol> renamed_to;
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auto rename = [&](const sem::Variable* var) -> const ast::Variable* {
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auto* decl = var->Declaration();
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auto name = ctx.src->Symbols().NameFor(decl->symbol);
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auto symbol = ctx.dst->Symbols().New(name);
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renamed_to.emplace(var, symbol);
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auto source = ctx.Clone(decl->source);
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auto* type = ctx.Clone(decl->type);
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auto* constructor = ctx.Clone(decl->constructor);
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auto attributes = ctx.Clone(decl->attributes);
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return ctx.dst->create<ast::Variable>(
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source, symbol, decl->declared_storage_class, decl->declared_access,
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type, decl->is_const, decl->is_overridable, constructor, attributes);
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};
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ctx.ReplaceAll([&](const ast::Variable* var) -> const ast::Variable* {
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if (auto* local = sem.Get<sem::LocalVariable>(var)) {
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if (local->Shadows()) {
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return rename(local);
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}
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}
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if (auto* param = sem.Get<sem::Parameter>(var)) {
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if (param->Shadows()) {
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return rename(param);
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}
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}
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return nullptr;
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});
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ctx.ReplaceAll([&](const ast::IdentifierExpression* ident)
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-> const tint::ast::IdentifierExpression* {
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if (auto* user = sem.Get<sem::VariableUser>(ident)) {
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auto it = renamed_to.find(user->Variable());
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if (it != renamed_to.end()) {
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return ctx.dst->Expr(it->second);
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}
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}
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return nullptr;
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});
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ctx.Clone();
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}
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};
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Unshadow::Unshadow() = default;
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Unshadow::~Unshadow() = default;
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void Unshadow::Run(CloneContext& ctx, const DataMap&, DataMap&) const {
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State(ctx).Run();
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}
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} // namespace tint::transform
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