eliminateSwitch.h

/*
 * Copyright 2020 VMware, Inc.
 * SPDX-FileCopyrightText: 2020 VMware, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef MIDEND_ELIMINATESWITCH_H_
#define MIDEND_ELIMINATESWITCH_H_
 
#include "frontends/p4/typeChecking/typeChecker.h"
#include "ir/ir.h"
 
namespace P4 {

class DoEliminateSwitch final : public Transform {
    MinimalNameGenerator nameGen;
    const TypeMap *typeMap;
    std::vector<const IR::Declaration *> toInsert;
 
 public:
    bool exactNeeded = false;
 
    explicit DoEliminateSwitch(const TypeMap *typeMap) : typeMap(typeMap) {
        setName("DoEliminateSwitch");
        CHECK_NULL(typeMap);
    }
 
    Visitor::profile_t init_apply(const IR::Node *node) override {
        auto rv = Transform::init_apply(node);
        node->apply(nameGen);
 
        return rv;
    }
 
    const IR::Node *postorder(IR::SwitchStatement *statement) override;
    const IR::Node *postorder(IR::P4Control *control) override;
    const IR::Node *postorder(IR::P4Program *program) override;
};
 
class EliminateSwitch final : public PassManager {
 public:
    EliminateSwitch(TypeMap *typeMap, TypeChecking *typeChecking = nullptr) {
        if (!typeChecking) typeChecking = new TypeChecking(nullptr, typeMap);
        passes.push_back(typeChecking);
        passes.push_back(new DoEliminateSwitch(typeMap));
        passes.push_back(new ClearTypeMap(typeMap));
        setName("EliminateSwitch");
    }
};
 
}  // namespace P4
 
#endif /* MIDEND_ELIMINATESWITCH_H_ */