dontcareArgs.h

/*
Copyright 2017 VMware, Inc.
 
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 FRONTENDS_P4_DONTCAREARGS_H_
#define FRONTENDS_P4_DONTCAREARGS_H_
 
#include "frontends/common/resolveReferences/resolveReferences.h"
#include "frontends/p4/typeChecking/typeChecker.h"
#include "ir/ir.h"
 
namespace P4 {

class DontcareArgs : public Transform, public ResolutionContext {
    MinimalNameGenerator nameGen;
    TypeMap *typeMap;
    IR::IndexedVector<IR::Declaration> toAdd;
 
 public:
    explicit DontcareArgs(TypeMap *typeMap) : typeMap(typeMap) {
        CHECK_NULL(typeMap);
        setName("DontcareArgs");
    }
    const IR::Node *postorder(IR::MethodCallExpression *expression) override;
    const IR::Node *postorder(IR::Function *function) override {
        if (!toAdd.empty()) {
            IR::IndexedVector<IR::StatOrDecl> body;
            for (auto d : toAdd) body.push_back(d);
            body.append(function->body->components);
            function->body =
                new IR::BlockStatement(function->body->srcInfo, function->body->annotations, body);
            toAdd.clear();
        }
        return function;
    }
    const IR::Node *postorder(IR::P4Action *action) override {
        if (!toAdd.empty()) {
            IR::IndexedVector<IR::StatOrDecl> body;
            for (auto d : toAdd) body.push_back(d);
            body.append(action->body->components);
            action->body =
                new IR::BlockStatement(action->body->srcInfo, action->body->annotations, body);
            toAdd.clear();
        }
        return action;
    }
    const IR::Node *postorder(IR::P4Parser *parser) override {
        if (!toAdd.empty()) {
            toAdd.append(parser->parserLocals);
            parser->parserLocals = toAdd;
            toAdd.clear();
        }
        return parser;
    }
    const IR::Node *postorder(IR::P4Control *control) override {
        if (!toAdd.empty()) {
            toAdd.append(control->controlLocals);
            control->controlLocals = toAdd;
            toAdd.clear();
        }
        return control;
    }
    profile_t init_apply(const IR::Node *node) override;
};
 
class RemoveDontcareArgs : public PassManager {
 public:
    explicit RemoveDontcareArgs(TypeMap *typeMap) {
        passes.push_back(new TypeChecking(nullptr, typeMap));
        passes.push_back(new DontcareArgs(typeMap));
        passes.push_back(new ClearTypeMap(typeMap));
        setName("RemoveDontcareArgs");
    }
};
 
}  // namespace P4
 
#endif /* FRONTENDS_P4_DONTCAREARGS_H_ */