splitter.h

/*
Copyright 2025-present Altera Corporation.
 
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.
*/
 
#ifndef IR_SPLITTER_H_
#define IR_SPLITTER_H_
 
#include "ir/ir.h"
#include "ir/visitor.h"
 
namespace P4 {
 
class NameGenerator;
class TypeMap;
 
template <typename Node>
struct SplitResult {
    const Node *before = nullptr;
    const Node *after = nullptr;
    std::vector<const IR::Declaration *> hoistedDeclarations;

    explicit operator bool() const { return after; }
    void clear() {
        before = after = nullptr;
        hoistedDeclarations.clear();
    }
};

SplitResult<IR::Statement> splitStatementBefore(
    const IR::Statement *stat,
    std::function<bool(const IR::Statement *, const P4::Visitor_Context *)> predicate,
    P4::NameGenerator &nameGen, P4::TypeMap *typeMap = nullptr);
 
}  // namespace P4
 
#endif  // IR_SPLITTER_H_