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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>
68 lines
2.1 KiB
C++
68 lines
2.1 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/for_loop_to_loop.h"
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#include "src/ast/break_statement.h"
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#include "src/program_builder.h"
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TINT_INSTANTIATE_TYPEINFO(tint::transform::ForLoopToLoop);
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namespace tint {
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namespace transform {
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ForLoopToLoop::ForLoopToLoop() = default;
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ForLoopToLoop::~ForLoopToLoop() = default;
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void ForLoopToLoop::Run(CloneContext& ctx, const DataMap&, DataMap&) {
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ctx.ReplaceAll(
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[&](const ast::ForLoopStatement* for_loop) -> const ast::Statement* {
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ast::StatementList stmts;
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if (auto* cond = for_loop->condition) {
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// !condition
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auto* not_cond = ctx.dst->create<ast::UnaryOpExpression>(
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ast::UnaryOp::kNot, ctx.Clone(cond));
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// { break; }
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auto* break_body =
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ctx.dst->Block(ctx.dst->create<ast::BreakStatement>());
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// if (!condition) { break; }
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stmts.emplace_back(ctx.dst->If(not_cond, break_body));
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}
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for (auto* stmt : for_loop->body->statements) {
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stmts.emplace_back(ctx.Clone(stmt));
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}
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const ast::BlockStatement* continuing = nullptr;
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if (auto* cont = for_loop->continuing) {
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continuing = ctx.dst->Block(ctx.Clone(cont));
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}
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auto* body = ctx.dst->Block(stmts);
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auto* loop = ctx.dst->create<ast::LoopStatement>(body, continuing);
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if (auto* init = for_loop->initializer) {
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return ctx.dst->Block(ctx.Clone(init), loop);
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}
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return loop;
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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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