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StatementAssign.h
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StatementAssign.h
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// -*- mode: C++ -*-
//
// Copyright (c) 2007, 2008, 2010, 2011 The University of Utah
// All rights reserved.
//
// This file is part of `csmith', a random generator of C programs.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#ifndef STATEMENT_ASSIGN_H
#define STATEMENT_ASSIGN_H
///////////////////////////////////////////////////////////////////////////////
#include <ostream>
#include <vector>
#include "Statement.h"
#include "FunctionInvocationBinary.h"
#include "Probabilities.h"
#include "Lhs.h"
class CGContext;
class Expression;
class Variable;
class SafeOpFlags;
class FactMgr;
class Lhs;
template <class Key, class Value>
class ProbabilityTable;
/*
* "Assignment operators." This is sort of a dumb model, but it will do for
* now.
*/
enum eAssignOps
{
eSimpleAssign,
eMulAssign,
eDivAssign,
eRemAssign,
eAddAssign,
eSubAssign,
eLShiftAssign,
eRShiftAssign,
eBitAndAssign,
eBitXorAssign,
eBitOrAssign,
ePreIncr,
ePreDecr,
ePostIncr,
ePostDecr
};
#define MAX_ASSIGN_OP ((eAssignOps) (ePostDecr+1))
/*
*
*/
class StatementAssign : public Statement
{
public:
// Factory method.
static StatementAssign *make_random(CGContext &cg_context, const Type* type=0, const CVQualifiers* qfer=0);
static StatementAssign *make_possible_compound_assign(CGContext &cg_context,
const Lhs &l,
eAssignOps op,
const Expression &e);
StatementAssign(Block* b, const Lhs &l, const Expression &e, eAssignOps op = eSimpleAssign, const SafeOpFlags *flags = NULL);
StatementAssign(Block* b, const Lhs &l, eAssignOps op, const Expression &e,
const Expression *er, const SafeOpFlags *flags,
std::string &tmp_name1, std::string &tmp_name2);
static void InitProbabilityTable();
static bool safe_assign(eAssignOps op);
static bool need_no_rhs(eAssignOps op) { return op==ePreIncr || op==ePreDecr || op==ePostIncr || op==ePostDecr;}
bool is_simple_assign(void) const { return op == eSimpleAssign;}
const Lhs* get_lhs(void) const {return &lhs;};
const Expression* get_rhs(void) const { return rhs;};
const Expression* get_expr(void) const { return &expr;};
static eAssignOps number_to_op(unsigned int value);
// StatementAssign canonize();
static eBinaryOps compound_to_binary_ops(eAssignOps op);
virtual ~StatementAssign(void);
virtual void get_blocks(std::vector<const Block*>& /* blks */) const {};
virtual void get_exprs(std::vector<const Expression*>& exps) const {exps.push_back(&expr); exps.push_back(&lhs);}
virtual bool visit_facts(vector<const Fact*>& inputs, CGContext& cg_context) const;
virtual std::vector<const ExpressionVariable*> get_dereferenced_ptrs(void) const;
virtual bool has_uncertain_call_recursive(void) const;
virtual void Output(std::ostream &out, FactMgr* fm, int indent = 0) const;
void output_op(std::ostream &out) const;
// XXX --- This should go away, once assignments are properly modeled as
// expressions.
virtual void OutputAsExpr(std::ostream &out) const;
void OutputSimple(std::ostream &out) const;
private:
static eAssignOps AssignOpsProbability(const Type* type);
const eAssignOps op;
const Lhs &lhs;
const Expression &expr;
// the real rhs canonized from compound operators, for example rhs for "i += 1" is "i + 1"
const Expression* rhs;
const SafeOpFlags *op_flags;
// used for AssignAdd etc;
std::string tmp_var1;
std::string tmp_var2;
static ProbabilityTable<unsigned int, int> *assignOpsTable_;
StatementAssign(const StatementAssign &sa); // unimplemented
StatementAssign &operator=(const StatementAssign &se); // unimplementable
};
///////////////////////////////////////////////////////////////////////////////
#endif // STATEMENT_ASSIGN_H
// Local Variables:
// c-basic-offset: 4
// tab-width: 4
// End:
// End of file.