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8648120bbe
And remove a whole load of const_cast hackery. Semantic nodes may contain internally mutable fields (although only ever modified during resolving), so these are always passed by `const` pointer. While all AST nodes are internally immutable, we have decided that pointers to AST nodes should also be marked `const`, for consistency. There's still a collection of const_cast calls in the Resolver. These will be fixed up in a later change. Bug: tint:745 Change-Id: I046309b8e586772605fc0fe6b2d27f28806d40ef Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/66606 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@chromium.org> Reviewed-by: David Neto <dneto@google.com>
61 lines
1.8 KiB
C++
61 lines
1.8 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/transform/simplify.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/program_builder.h"
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#include "src/sem/block_statement.h"
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#include "src/sem/function.h"
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#include "src/sem/statement.h"
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#include "src/sem/variable.h"
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#include "src/utils/scoped_assignment.h"
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TINT_INSTANTIATE_TYPEINFO(tint::transform::Simplify);
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namespace tint {
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namespace transform {
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Simplify::Simplify() = default;
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Simplify::~Simplify() = default;
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void Simplify::Run(CloneContext& ctx, const DataMap&, DataMap&) {
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ctx.ReplaceAll([&](const ast::Expression* expr) -> const ast::Expression* {
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if (auto* outer = expr->As<ast::UnaryOpExpression>()) {
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if (auto* inner = outer->expr->As<ast::UnaryOpExpression>()) {
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if (outer->op == ast::UnaryOp::kAddressOf &&
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inner->op == ast::UnaryOp::kIndirection) {
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// &(*(expr)) => expr
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return ctx.Clone(inner->expr);
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}
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if (outer->op == ast::UnaryOp::kIndirection &&
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inner->op == ast::UnaryOp::kAddressOf) {
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// *(&(expr)) => expr
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return ctx.Clone(inner->expr);
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}
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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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} // namespace transform
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} // namespace tint
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