mirror of
https://github.com/encounter/dawn-cmake.git
synced 2025-05-17 04:41:23 +00:00
783b169bf4
Change-Id: I10dd2feeaeb86a1ee7769d2bfd172e49c2805cb3 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/97843 Reviewed-by: Dan Sinclair <dsinclair@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@google.com>
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
// Copyright 2022 The Tint Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "src/tint/transform/while_to_loop.h"
|
|
|
|
#include "src/tint/ast/break_statement.h"
|
|
#include "src/tint/program_builder.h"
|
|
|
|
TINT_INSTANTIATE_TYPEINFO(tint::transform::WhileToLoop);
|
|
|
|
namespace tint::transform {
|
|
|
|
WhileToLoop::WhileToLoop() = default;
|
|
|
|
WhileToLoop::~WhileToLoop() = default;
|
|
|
|
bool WhileToLoop::ShouldRun(const Program* program, const DataMap&) const {
|
|
for (auto* node : program->ASTNodes().Objects()) {
|
|
if (node->Is<ast::WhileStatement>()) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void WhileToLoop::Run(CloneContext& ctx, const DataMap&, DataMap&) const {
|
|
ctx.ReplaceAll([&](const ast::WhileStatement* w) -> const ast::Statement* {
|
|
utils::Vector<const ast::Statement*, 16> stmts;
|
|
auto* cond = w->condition;
|
|
|
|
// !condition
|
|
auto* not_cond =
|
|
ctx.dst->create<ast::UnaryOpExpression>(ast::UnaryOp::kNot, ctx.Clone(cond));
|
|
|
|
// { break; }
|
|
auto* break_body = ctx.dst->Block(ctx.dst->create<ast::BreakStatement>());
|
|
|
|
// if (!condition) { break; }
|
|
stmts.Push(ctx.dst->If(not_cond, break_body));
|
|
|
|
for (auto* stmt : w->body->statements) {
|
|
stmts.Push(ctx.Clone(stmt));
|
|
}
|
|
|
|
const ast::BlockStatement* continuing = nullptr;
|
|
|
|
auto* body = ctx.dst->Block(stmts);
|
|
auto* loop = ctx.dst->create<ast::LoopStatement>(body, continuing);
|
|
|
|
return loop;
|
|
});
|
|
|
|
ctx.Clone();
|
|
}
|
|
|
|
} // namespace tint::transform
|