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Variable.cpp
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Variable.cpp
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// -*- mode: C++ -*-
//
// Copyright (c) 2007, 2008, 2009, 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.
//
// This file was derived from a random program generator written by Bryan
// Turner. The attributions in that file was:
//
// Random Program Generator
// Bryan Turner (bryan.turner@pobox.com)
// July, 2005
//
#ifdef WIN32
#pragma warning(disable : 4786) /* Disable annoying warning messages */
#endif
#include "Variable.h"
#include <cassert>
#include "Common.h"
#include "Block.h"
#include "CGContext.h"
#include "CGOptions.h"
#include "Constant.h"
#include "Effect.h"
#include "Function.h"
#include "Type.h"
#include "Fact.h"
#include "FactMgr.h"
#include "FactPointTo.h"
#include "FactUnion.h"
#include "random.h"
#include "util.h"
#include "Lhs.h"
#include "ExpressionVariable.h"
#include "Bookkeeper.h"
#include "Filter.h"
#include "Error.h"
#include "ArrayVariable.h"
#include "StringUtils.h"
using namespace std;
std::vector<const Variable*> Variable::ctrl_vars;
const char Variable::sink_var_name[] = "csmith_sink_";
//////////////////////////////////////////////////////////////////////////////
int find_variable_in_set(const vector<const Variable*>& set, const Variable* v)
{
size_t i;
for (i=0; i<set.size(); i++) {
if (set[i]->match(v)) {
return i;
}
}
return -1;
}
int find_variable_in_set(const vector<Variable*>& set, const Variable* v)
{
size_t i;
for (i=0; i<set.size(); i++) {
if (set[i]->match(v)) {
return i;
}
}
return -1;
}
int find_field_variable_in_set(const vector<const Variable*>& set, const Variable* v)
{
size_t i;
if (v->is_aggregate()) {
for (i=0; i<v->field_vars.size(); i++) {
const Variable* field = v->field_vars[i];
int pos = find_variable_in_set(set, field);
if (pos != -1) return pos;
pos = find_field_variable_in_set(set, field);
if (pos != -1) return pos;
}
}
return -1;
}
bool is_variable_in_set(const vector<const Variable*>& set, const Variable* v)
{
size_t i;
for (i=0; i<set.size(); i++) {
if (set[i] == v) {
return true;
}
}
return false;
}
bool add_variable_to_set(vector<const Variable*>& set, const Variable* v)
{
if (!is_variable_in_set(set, v)) {
set.push_back(v);
return true;
}
return false;
}
bool add_variables_to_set(vector<const Variable*>& set, const vector<const Variable*>& new_set)
{
size_t i;
bool changed = false;
for (i=0; i<new_set.size(); i++) {
if (add_variable_to_set(set, new_set[i])) {
changed = true;
}
}
return changed;
}
// return true if two sets contains same variables
bool equal_variable_sets(const vector<const Variable*>& set1, const vector<const Variable*>& set2)
{
size_t i;
if (set1.size() == set2.size()) {
for (i=0; i<set1.size(); i++) {
if (!is_variable_in_set(set2, set1[i])) {
return false;
}
}
return true;
}
return false;
}
// return true if set1 is subset of set2, or equal
bool sub_variable_sets(const vector<const Variable*>& set1, const vector<const Variable*>& set2)
{
size_t i;
if (set1.size() <= set2.size()) {
for (i=0; i<set1.size(); i++) {
if (!is_variable_in_set(set2, set1[i])) {
return false;
}
}
return true;
}
return false;
}
// combine two variable sets into one, note struct field "s1.f1" and "s1" is combined into "s1"
void combine_variable_sets(const vector<const Variable*>& set1, const vector<const Variable*>& set2, vector<const Variable*>& set_all)
{
size_t i;
set_all = set1;
for (i=0; i<set2.size(); i++) {
const Variable* v = set2[i];
if (find_variable_in_set(set1, v) == -1) {
set_all.push_back(v);
}
}
}
/* replace all the field vars with their parent vars */
void remove_field_vars(vector<const Variable*>& set)
{
size_t i;
size_t len = set.size();
for (i=0; i<len; i++) {
const Variable* v = set[i];
if (v->is_field_var()) {
while (v->field_var_of) {
v = v->field_var_of;
}
set.erase(set.begin() + i);
add_variable_to_set(set, v);
i--;
len = set.size();
}
}
}
const Variable*
Variable::get_container_union(void) const
{
if (type == NULL) return NULL;
const Variable* p = this;
for (; p && p->type->eType != eUnion; p = p->field_var_of)
;
return p;
}
/*
* examples: array[0] "loose matches" array[1]; array[3] "loose matches" array[x].f1...
* union.f1 "loose matches" union.f2.f3
*/
bool
Variable::loose_match(const Variable* v) const
{
const Variable* me = get_collective();
const Variable* you = v->get_collective();
if (me->match(you)) {
return true;
}
// find the union variable(s) that contain me and you
me = me->get_container_union();
you = you->get_container_union();
return you && me && (you == me);
}
/*
* a struct variable "matches" it's field variable
*/
bool
Variable::match(const Variable* v) const
{
if (type && v->type && type->is_aggregate()) {
return (this == v) || has_field_var(v);
}
return this == v;
}
int
Variable::get_seq_num(void) const
{
size_t index = name.find('_');
assert(index != string::npos);
return StringUtils::str2int(name.substr(index+1));
}
/*
* return if this is the field of an array member
*/
bool
Variable::is_array_field(void) const
{
if (field_var_of) {
return field_var_of->is_array_field();
}
return isArray;
}
/*
* return if this is the field of an pre-itemized array member
*/
bool
Variable::is_virtual(void) const
{
if (field_var_of) {
return field_var_of->is_virtual();
}
if (isArray) {
return ((const ArrayVariable*)this)->collective==0;
}
return false;
}
///////////////////////////////////////////////////////////////////////////////
/* check if field variables exists in this struct
************************************************************************/
bool Variable::has_field_var(const Variable* v) const
{
if (type->is_aggregate()) {
const Variable* tmp = v;
while (tmp) {
if (tmp == this) {
return true;
}
tmp = tmp->field_var_of;
}
}
return false;
}
const Variable*
Variable::get_top_container(void) const
{
const Variable* v = this;
for (; v && v->field_var_of; v = v->field_var_of) {
/* Empty */
}
return v;
}
int
Variable::get_field_id(void) const
{
if (field_var_of) {
for (size_t i=0; i<field_var_of->field_vars.size(); i++) {
if (field_var_of->field_vars[i] == this) {
return i;
}
}
}
return -1;
}
///////////////////////////////////////////////////////////////////////////////
/* expand field variables of struct, assigned names, f0, f1, etc, to them
************************************************************************/
void Variable::create_field_vars(const Type *type)
{
assert(type->is_aggregate());
size_t i, j;
assert(type->fields.size() == type->qfers_.size());
j = 0;
if (name == "g_481")
j = 0;
bool is_vol_var = qfer.is_volatile();
bool is_const_var = qfer.is_const();
for (i=0; i<type->fields.size(); i++) {
if (type->is_unamed_padding(i))
continue;
ostringstream ss;
if (isArray) {
Output(ss);
}
else {
ss << name;
}
ss << ".f" << j++;
CVQualifiers quals = type->qfers_[i];
quals.set_const(is_const_var || quals.is_const());
quals.set_volatile(is_vol_var || quals.is_volatile());
bool isBitfield = type->is_bitfield(i);
Variable *var = Variable::CreateVariable(ss.str(), type->fields[i],
quals.get_consts(), quals.get_volatiles(), false, false, false, isBitfield, this);
assert(var->qfer.sanity_check(var->type));
field_vars.push_back(var);
}
}
Variable *
Variable::CreateVariable(const std::string &name, const Type *type,
bool isConst, bool isVolatile,
bool isAuto, bool isStatic,
bool isRegister, bool isBitfield, const Variable* isFieldVarOf)
{
vector<bool> isConsts, isVolatiles;
isConsts.push_back(isConst);
isVolatiles.push_back(isVolatile);
return CreateVariable(name, type, isConsts, isVolatiles, isAuto, isStatic, isRegister, isBitfield, isFieldVarOf);
}
Variable *
Variable::CreateVariable(const std::string &name, const Type *type,
const vector<bool>& isConsts, const vector<bool>& isVolatiles,
bool isAuto, bool isStatic, bool isRegister, bool isBitfield, const Variable* isFieldVarOf)
{
Variable *var = new Variable(name, type, isConsts, isVolatiles,
isAuto, isStatic, isRegister, isBitfield, isFieldVarOf);
assert(type);
if (type->eType == eSimple)
assert(type->simple_type != eVoid);
const Variable* top = isFieldVarOf;
while (top->field_var_of) top = top->field_var_of;
var->init = (top->type->eType == eUnion) ? 0 : Constant::make_random(type);
ERROR_GUARD_AND_DEL1(NULL, var);
if (type->is_aggregate()) {
var->create_field_vars(type);
}
ERROR_GUARD_AND_DEL1(NULL, var);
return var;
}
Variable *
Variable::CreateVariable(const std::string &name, const Type *type, const Expression* init, const CVQualifiers* qfer)
{
assert(type);
if (type->eType == eSimple)
assert(type->simple_type != eVoid);
Variable *var = new Variable(name, type, init, qfer);
if (type->is_aggregate()) {
var->create_field_vars(type);
}
ERROR_GUARD_AND_DEL1(NULL, var);
return var;
}
/*
*
*/
Variable::Variable(const std::string &name, const Type *type,
const vector<bool>& isConsts, const vector<bool>& isVolatiles,
bool isAuto, bool isStatic, bool isRegister, bool isBitfield, const Variable* isFieldVarOf)
: name(name), type(type),
init(0),
isAuto(isAuto), isStatic(isStatic), isRegister(isRegister),
isBitfield_(isBitfield), field_var_of(isFieldVarOf), isArray(false),
qfer(isConsts, isVolatiles)
{
// nothing else to do
}
/*
*
*/
Variable::Variable(const std::string &name, const Type *type, const Expression* init, const CVQualifiers* qfer)
: name(name), type(type),
init(init),
isAuto(false), isStatic(false), isRegister(false), isBitfield_(false), field_var_of(0), isArray(false),
qfer(*qfer)
{
// nothing else to do
}
Variable::Variable(const std::string &name, const Type *type, const Expression* init, const CVQualifiers* qfer, const Variable* isFieldVarOf, bool isArray)
: name(name), type(type),
init(init),
isAuto(false), isStatic(false), isRegister(false), isBitfield_(false),
field_var_of(isFieldVarOf),
isArray(isArray),
qfer(*qfer)
{
// nothing else to do
}
/*
*
*/
Variable::~Variable(void)
{
// delete field vars explicitly because they are not stored in AllVars anymore
vector<Variable *>::iterator i;
for(i = field_vars.begin(); i != field_vars.end(); ++i)
delete (*i);
field_vars.clear();
if (init) {
delete init;
init = NULL;
}
}
// --------------------------------------------------------------
bool
Variable::is_global(void) const
{
if (is_field_var()) {
return field_var_of->is_global();
}
return (name.find("g_") == 0);
}
bool
Variable::is_local(void) const
{
return (name.find("l_") == 0);
}
// -------------------------------------------------------------
bool
Variable::is_visible_local(const Block* blk) const
{
if (blk == 0) {
return is_global();
}
if (is_field_var()) {
return field_var_of->is_visible_local(blk);
}
size_t i;
const Function* func = blk->func;
for (i=0; i<func->param.size(); i++) {
if (func->param[i]->match(this)) {
return true;
}
}
const Block* b = blk;
while (b) {
if (find_variable_in_set(b->local_vars, this) != -1) {
return true;
}
b = b->parent;
}
return false;
}
// --------------------------------------------------------------
bool
Variable::is_argument(void) const
{
// JYTODO: need stronger criteria?
return (name.find("p_") == 0);
}
// --------------------------------------------------------------
bool
Variable::is_tmp_var(void) const
{
// JYTODO: need stronger criteria?
return (name.find("t") == 0);
}
bool
Variable::is_const(void) const
{
return is_const_after_deref(0);
}
bool
Variable::is_volatile(void) const
{
return is_volatile_after_deref(0);
}
bool
Variable::is_const_after_deref(int deref_level) const
{
if (deref_level < 0) {
return false;
}
// check qualifiers
if (qfer.is_const_after_deref(deref_level)) {
return true;
}
if (type) {
// check struct/union type
int i;
const Type* t = type;
for (i=0; i<deref_level; i++) {
t = t->ptr_type;
}
assert(t);
return t->is_const_struct_union();
}
return false;
}
bool
Variable::is_volatile_after_deref(int deref_level) const
{
if (deref_level < 0) {
return false;
}
// check qualifiers
if (qfer.is_volatile_after_deref(deref_level)) {
return true;
}
if (type) {
// check struct/union type
int i;
const Type* t = type;
for (i=0; i<deref_level; i++) {
t = t->ptr_type;
}
assert(t);
return t->is_volatile_struct_union();
}
return false;
}
/*
* return an array deputy annotation for each level of indirection of a pointer based on it's point-to set
* for non-pointers, return an empty set
*/
vector<string>
Variable::deputy_annotation(void) const
{
size_t len;
int pos, i, j;
vector<string> annotations;
const Variable* tmp = this;
bool has_null = false;
bool null_based = false;
if (name == "p_24")
i = 0;
while (tmp && tmp->type->eType == ePointer) {
pos = -1;
string anno;
for (i=0; i<static_cast<int>(FactPointTo::all_ptrs.size()); i++) {
if (FactPointTo::all_ptrs[i] == tmp) {
pos = i;
break;
}
}
if (pos == -1) break;
vector<const Variable*> set = FactPointTo::all_aliases[pos];
// take out tbd in point-to-set for parameters
j = find_variable_in_set(set, FactPointTo::tbd_ptr);
if (set.size() > 1 && j != -1) {
set.erase(set.begin() + j);
}
bool has_array = false;
len = set.size();
for (j=0; j<static_cast<int>(len); j++) {
if (set[j] == FactPointTo::null_ptr) {
// remove null pointer from set
has_null = true;
set.erase(set.begin() + j);
j--;
len--;
}
else if (set[j]->isArray || set[j]->is_array_field()) {
has_array = true;
}
}
/* if "int *** p = 0", we can annotate it as "int * SAFE * SAFE * SAFE p" */
if (len == 0 && has_null) {
null_based = true;
}
if (!has_array) {
anno = (has_null ? "SAFE" : "SAFE NONNULL");
// special handling to satisfy deputy, no "NONNULL" for array of pointers
if (tmp->isArray || tmp->is_array_field()) {
anno = "SAFE";
}
}
tmp = 0;
if (len == 1) {
const Variable* pointee = set[0];
if (pointee->isArray || pointee->is_array_field()) {
ostringstream oss;
oss << "BOUND(&";
pointee->OutputLowerBound(oss);
oss << ", &";
pointee->OutputUpperBound(oss);
oss << ")";
anno = oss.str();
}
//if (pointee->is_array_field()) {
// while (pointee->field_var_of) {
// pointee = pointee->field_var_of;
// }
// assert(pointee->isArray);
//}
//// pointing to an array
//if (pointee->isArray) {
// const ArrayVariable* av = (const ArrayVariable*)pointee;
// ostringstream oss;
// oss << "COUNT(";
// for (j=0; j<av->get_dimension(); j++) {
// if (j > 0) oss << " * ";
// oss << av->get_sizes()[j];
// }
// oss << ")";
// anno = oss.str();
//}
if (pointee->type && pointee->type->eType == ePointer) {
tmp = pointee;
}
}
if (anno == "") {
anno = "BOUND(__auto, __auto)";
}
annotations.insert(annotations.begin(), anno);
}
int prepend = type->get_indirect_level() - annotations.size();
for (i=0; i<prepend; i++) {
if (null_based) {
annotations.insert(annotations.begin(), "SAFE");
} else {
annotations.insert(annotations.begin(), "BOUND(__auto, __auto)");
}
}
return annotations;
}
const Variable*
Variable::get_collective(void) const
{
// special handling for array fields
if (is_array_field()) {
// find top-level parent, which should be an array
const Variable* parent = field_var_of;
for (; parent && !parent->isArray; parent = parent->field_var_of) {
/* Empty. */
}
assert(parent);
// if this is alreay a field of a collective array, return itself
if (parent->get_collective() == parent) return this;
// find the collective for top-level array, and return the corresponding field var
const Variable* coll = parent->get_collective();
size_t index, pos1, pos2;
size_t pos3 = name.find_last_of("]");
assert(pos3 != string::npos);
string field_names = name.substr(pos3);
pos1 = field_names.find(".");
while (pos1 != string::npos) {
pos2 = field_names.find(".", pos1+1);
string s = (pos2 == string::npos) ? field_names.substr(pos1+2) : field_names.substr(pos1+2, pos2-pos1-2);
index = StringUtils::str2int(s);
assert(index < coll->field_vars.size());
coll = coll->field_vars[index];
pos1 = pos2;
}
return coll;
} else {
return this;
}
}
const Variable*
Variable::get_named_var(void) const
{
const Variable* v = this;
while (v->field_var_of) {
v = v->field_var_of;
}
return v->get_collective();
}
const ArrayVariable*
Variable::get_array(string& field) const
{
// special handling for array fields
if (is_array_field()) {
// find top-level parent, which should be an array
const Variable* parent = field_var_of;
for (; parent && !parent->isArray; parent = parent->field_var_of) {
/* Empty. */
}
assert(parent);
size_t bracket = name.find_last_of("]");
if (bracket == string::npos) {
bracket = 0;
}
size_t dot = name.find(".", bracket);
assert(dot != string::npos);
field = name.substr(dot);
return (const ArrayVariable*)parent;
}
return NULL;
}
// --------------------------------------------------------------
void
Variable::OutputDef(std::ostream &out, int indent) const
{
output_tab(out, indent);
// force global variables to be static if necessary
if (CGOptions::force_globals_static() && is_global()) {
out << "static ";
}
output_qualified_type(out);
out << get_actual_name() << " = ";
assert(init);
init->Output(out);
out << ";";
if (is_volatile()) {
string comment = "VOLATILE GLOBAL " + get_actual_name();
output_comment_line(out, comment);
} else {
outputln(out);
}
}
void Variable::OutputDecl(std::ostream &out) const
{
// force global variables to be static if necessary
if (CGOptions::force_globals_static() && is_global()) {
out << "static ";
}
output_qualified_type(out);
out << get_actual_name();
}
std::string
Variable::get_actual_name() const
{
std::string s = name;
if (is_global())
return get_prefixed_name(s);
else
return s;
}
// --------------------------------------------------------------
void
Variable::Output(std::ostream &out) const
{
if (is_volatile() && CGOptions::wrap_volatiles()) {
out << "VOL_RVAL(" << get_actual_name() << ", ";
type->Output(out);
out << ")";
} else {
out << get_actual_name();
}
}
// --------------------------------------------------------------
// This function is a bit of hack, because ---
// &VOL_RVAL(g_4)
// is invalid when VOL_RVAL expands into a function call.
void
Variable::OutputAddrOf(std::ostream &out) const
{
out << "&" << get_actual_name();
}
// --------------------------------------------------------------
void
Variable::OutputForComment(std::ostream &out) const
{
out << get_actual_name();
}
// --------------------------------------------------------------
void
Variable::output_qualified_type(std::ostream &out) const
{
if (type->eType == ePointer && CGOptions::deputy()) {
vector<string> annotations = deputy_annotation();
qfer.output_qualified_type_with_deputy_annotation(type, out, annotations);
}
else {
qfer.output_qualified_type(type, out);
}
}
// --------------------------------------------------------------
void
Variable::OutputUpperBound(std::ostream &out) const
{
if (field_var_of) {
field_var_of->OutputUpperBound(out);
size_t dot = name.find_last_of(".");
assert(dot != string::npos);
string postfix = name.substr(dot, string::npos);
out << postfix;
}
else {
out << get_actual_name();
}
}
// --------------------------------------------------------------
void
Variable::OutputLowerBound(std::ostream &out) const
{
if (field_var_of) {
field_var_of->OutputLowerBound(out);
size_t dot = name.find_last_of(".");
assert(dot != string::npos);
string postfix = name.substr(dot, string::npos);
out << postfix;
}
else {
out << get_actual_name();
}
}
// --------------------------------------------------------------
void
Variable::setup_ctrl_vars(void)
{
char name[2] = "i";
int i;
if (ctrl_vars.empty()) {
CVQualifiers dummy;
dummy.add_qualifiers(false, false);
for (i=0; i<CGOptions::max_array_dimensions(); i++) {
Variable *v = new Variable(name, 0, 0, &dummy);
ctrl_vars.push_back(v);
name[0] = name[0] + 1;
}
}
}
// ------------------------------------------------------------
void
Variable::doFinalization(void)
{
for (size_t i=0; i<ctrl_vars.size(); i++) {
delete ctrl_vars[i];
}
ctrl_vars.clear();
}
// --------------------------------------------------------------
void
MapVariableList(const vector<Variable*> &var, std::ostream &out,
int (*func)(Variable *var, std::ostream *pOut))
{
for_each(var.begin(), var.end(), std::bind2nd(std::ptr_fun(func), &out));
}
// --------------------------------------------------------------
void
OutputArrayCtrlVars(std::ostream &out, size_t dimen, int indent)
{
assert(dimen <= Variable::ctrl_vars.size());
output_tab(out, indent);
out << "int ";
for (size_t i=0; i<dimen; i++) {
out << Variable::ctrl_vars[i]->get_actual_name();
out << ((i==dimen-1) ? "" : ", ");
}
out << ";";
outputln(out);
}
size_t
Variable::GetMaxArrayDimension(const vector<Variable*>& vars)
{
// find the largest dimension of arrays, if there is any
size_t dimen = 0;
// setup control vars if necessary
Variable::setup_ctrl_vars();
for (size_t i=0; i<vars.size(); i++) {
if (vars[i]->isArray) {
ArrayVariable* av = (ArrayVariable*)(vars[i]);
// const Array members were initialzed in ArrayVariable::OutputDef
if (av->get_dimension() > dimen) {
dimen = av->get_dimension();
}
}
}
return dimen;
}
void
OutputArrayInitializers(const vector<Variable*>& vars, std::ostream &out, int indent)
{
size_t i, dimen;
dimen = Variable::GetMaxArrayDimension(vars);
if (dimen) {
OutputArrayCtrlVars(out, dimen, indent);
for (i=0; i<vars.size(); i++) {
if (vars[i]->isArray) {
ArrayVariable* av = (ArrayVariable*)(vars[i]);
if (!av->no_loop_initializer()) {
av->output_init(out, av->init, Variable::ctrl_vars, indent);
}
}
}
}
}
void OutputVolatileAddress(const vector<Variable*> &vars, std::ostream &out, int indent, const string &fp_string)
{
std::vector<Variable*>::const_iterator i;
std::vector<std::string> seen_names;
for(i = vars.begin(); i != vars.end(); ++i) {
(*i)->output_volatile_address(out, indent, fp_string, seen_names);
}
}
// --------------------------------------------------------------
void
OutputVariableList(const vector<Variable*> &vars, std::ostream &out, int indent)
{
size_t i;
// have to use iterator instead of map because we need indent as paramter
for (i=0; i<vars.size(); i++) {
vars[i]->OutputDef(out, indent);
}
if (!vars.empty() && !vars[0]->is_global()) {
OutputArrayInitializers(vars, out, indent);
}
}
void
OutputVariableDeclList(const vector<Variable*> &var, std::ostream &out, std::string prefix, int indent)
{
// have to use iterator instead of map because we need indent as paramter
for (size_t i=0; i<var.size(); i++) {
output_tab(out, indent);
out << prefix;
var[i]->OutputDecl(out);
out << ";";
outputln(out);
}
}
bool
Variable::compatible(const Variable *v) const
{
if (is_volatile() || v->is_volatile())
return false;