source: src/CodeGen/FixNames.cpp @ db19e1d

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// FixNames.cpp -- Adjustments to typed declarations.
//
// Author           : Richard C. Bilson
// Created On       : Mon May 18 07:44:20 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Thu Dec 14 16:16:51 2023
// Update Count     : 25
//

#include "FixNames.hpp"

#include <memory>                    // for unique_ptr
#include <string>                    // for string, operator!=, operator==

#include "AST/Chain.hpp"
#include "AST/Expr.hpp"
#include "AST/Pass.hpp"
#include "Common/SemanticError.hpp"  // for SemanticError
#include "FixMain.hpp"               // for FixMain
#include "SymTab/Mangler.hpp"        // for Mangler
#include "CompilationState.hpp"

namespace CodeGen {

namespace {

/// Does work with the main function and scopeLevels.
class FixNames final {
        int scopeLevel = 1;

        bool shouldSetScopeLevel( const ast::DeclWithType * dwt ) {
                return !dwt->name.empty() && dwt->linkage.is_mangled
                        && dwt->scopeLevel != scopeLevel;
        }
public:
        const ast::ObjectDecl *postvisit( const ast::ObjectDecl *objectDecl ) {
                if ( shouldSetScopeLevel( objectDecl ) ) {
                        return ast::mutate_field( objectDecl, &ast::ObjectDecl::scopeLevel, scopeLevel );
                }
                return objectDecl;
        }

        const ast::FunctionDecl *postvisit( const ast::FunctionDecl *functionDecl ) {
                if ( isMain( functionDecl ) ) {
                        auto mutDecl = ast::mutate( functionDecl );

                        if ( shouldSetScopeLevel( mutDecl ) ) {
                                mutDecl->scopeLevel = scopeLevel;
                        }

                        int nargs = mutDecl->params.size();
                        if ( 0 != nargs && 2 != nargs && 3 != nargs ) {
                                SemanticError( functionDecl, "Main expected to have 0, 2 or 3 arguments" );
                        }
                        ast::chain_mutate( mutDecl->stmts )->kids.push_back(
                                new ast::ReturnStmt(
                                        mutDecl->location,
                                        ast::ConstantExpr::from_int( mutDecl->location, 0 )
                                )
                        );

                        return mutDecl;
                } else if ( shouldSetScopeLevel( functionDecl ) ) {
                        return ast::mutate_field( functionDecl, &ast::FunctionDecl::scopeLevel, scopeLevel );
                } else {
                        return functionDecl;
                }
        }

        void previsit( const ast::CompoundStmt * ) {
                scopeLevel += 1;
        }

        void postvisit( const ast::CompoundStmt * ) {
                scopeLevel -= 1;
        }
};

} // namespace

void fixNames( ast::TranslationUnit & translationUnit ) {
        ast::Pass<FixNames>::run( translationUnit );
}

} // namespace CodeGen

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //