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InterCode.C
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InterCode.C
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#include "InterCode.h"
#define TAB_SPACE 8
#define E_PREFIX "_event_"
long LabelClass::labelCount = 0;
std::map <string, InterCode*> LabelClass::label_interCode_map;
void InterCode::print(ostream &os) {
ExprNode** op = (ExprNode**)opnds_;
switch (optype_) {
case EXPR: {
switch (subCode_) {
default:
if (op[0] && op[1] && op[2]) {
prtSpace(os, TAB_SPACE);
os << op[0]->getRefName() << " = " << op[1]->getRefName();
os << " " << OpNode::opInfo[(int )subCode_].name_ << " ";
os << op[2]->getRefName();
}
break;
case OpNode::OpCode::NOT:
case OpNode::OpCode::BITNOT:
case OpNode::OpCode::UMINUS:
if (op[0] && op[1]) {
prtSpace(os, TAB_SPACE);
os << op[0]->getRefName() << " = ";
os << OpNode::opInfo[(int )subCode_].name_;
os << op[1]->getRefName();
}
break;
case OpNode::OpCode::ASSIGN:
prtSpace(os, TAB_SPACE);
os << op[0]->getRefName() << " = " << op[1]->getRefName();
break;
}
break;
}
case GOTO: {
InterCode* goto_lab = (InterCode*) op[0];
prtSpace(os, TAB_SPACE);
os << "goto ";
goto_lab->print(os);
break;
}
case LABEL: {
string *n = (string *)op[1];
if (n && n->length()) {
os << *n << ":";
} else {
os << "L" << (long )op[0] << ":";
}
}
break;
case IFREL: {
assert(op[0] && "Expected Operand 0");
prtSpace(os, TAB_SPACE);
os << "if ";
ExprNode* cond = (ExprNode*) op[0];
InterCode* true_lab = cond->OnTrue();
InterCode* false_lab = cond->OnFalse();
if (op[2] && op[1]) {
os << op[1]->getRefName() << " ";
os << OpNode::opInfo[(int )subCode_].name_;
os << " " << op[2]->getRefName();
} else if (op[1]) {
os << OpNode::opInfo[(int )subCode_].name_ << op[1]->getRefName();
} else {
os << op[0]->getRefName();
}
os << " goto ";
true_lab->print(os);
if (false_lab) {
os << endl;
prtSpace(os, TAB_SPACE);
os << "goto ";
false_lab->print(os);
}
}
break;
case ENTER: {
prtSpace(os, TAB_SPACE);
os << "enter " << ((FunctionEntry*)op[0])->name();
}
break;
case LEAVE: {
prtSpace(os, TAB_SPACE);
os << "leave " << ((FunctionEntry*)op[0])->name();
}
break;
case CALL: {
prtSpace(os, TAB_SPACE);
if (op[1]) {
os << op[1]->getRefName() << " = ";
}
os << "call " << ((InvocationNode*)op[0])->symTabEntry()->name();
}
break;
case RETURN:{
prtSpace(os, TAB_SPACE);
os << "return";
if (op[0]) {
os << " " << op[0]->getRefName();
}
}
break;
case APARAM:{
prtSpace(os, TAB_SPACE);
os << "aparam " << op[0]->getRefName();
}
break;
case FPARAM:{
prtSpace(os, TAB_SPACE);
os << "fparam " << op[0]->getRefName();
}
break;
case PRINT: {
prtSpace(os, TAB_SPACE);
os << "print " << op[0]->getRefName();
}
break;
default:
assert(0 && "Unsupported 3AddrCode");
}
}
string InterCode::getLabel() {
if (optype_ != LABEL) return "";
int id = (long)opnds_[0];
string *name = (string *) opnds_[1];
if (name && name->length()) {
return *name;
} else {
ostringstream os;
os << "L" << id;
return os.str();
}
}
bool InterCode::xchgSubcode() {
switch (subCode_) {
case OpNode::OpCode::EQ:
subCode_ = OpNode::OpCode::NE;
break;
case OpNode::OpCode::NE:
subCode_ = OpNode::OpCode::EQ;
break;
case OpNode::OpCode::GT:
subCode_ = OpNode::OpCode::LE;
break;
case OpNode::OpCode::GE:
subCode_ = OpNode::OpCode::LT;
break;
case OpNode::OpCode::LE:
subCode_ = OpNode::OpCode::GT;
break;
case OpNode::OpCode::LT:
subCode_ = OpNode::OpCode::GE;
break;
default:
return false;
//subCode_ = OpNode::OpCode::INVALID;
//cout<<"Cannot negate the subcode_";
break;
}
return true;
}
void InterCodesClass::printMap() {
map <string, vector<InterCode*>*>::iterator it = labelUsageMap.begin();
for (; it != labelUsageMap.end(); it++) {
cout << "\n##### Label Name : " << (*it).first << "\t References : " << (*it).second->size() << "#####" << endl;
}
}
void InterCodesClass::insertMap(string name, InterCode* ic) {
vector <InterCode*>* tempVector;
if (labelUsageMap.find(name) == labelUsageMap.end()) {
tempVector = new vector<InterCode*>;
if (ic->getOPNType() != InterCode::LABEL)
tempVector->push_back(ic);
}
else
{
tempVector = labelUsageMap.find(name)->second;
if (ic->getOPNType() != InterCode::LABEL)
tempVector->push_back(ic);
}
labelUsageMap.insert (pair<string, vector <InterCode*>*> (name, tempVector));
}
void InterCodesClass::createLabelDUChain()
{
int i;
vector<InterCode*>* dupICodeVector = getICodeVector();
ExprNode* cond;
InterCode* true_lab, *false_lab, *goto_lab, *start_lab;
for ( i = 0; i < (int )dupICodeVector->size(); i++) {
if (dupICodeVector->at(i)->getOPNType() == InterCode::IFREL) {
ExprNode** operands = (ExprNode**)dupICodeVector->at(i)->get3Operands();
cond = operands[0];
true_lab = cond->OnTrue();
insertMap(true_lab->getLabel(), dupICodeVector->at(i));
false_lab = cond->OnFalse();
if(false_lab)
insertMap(true_lab->getLabel(), dupICodeVector->at(i));
}
else if (dupICodeVector->at(i)->getOPNType() == InterCode::GOTO) {
ExprNode** operands = (ExprNode**)dupICodeVector->at(i)->get3Operands();
// cout << "\nLabel Name = " << goto_lab->getLabel();
goto_lab = (InterCode *)operands[0];
insertMap(goto_lab->getLabel(), dupICodeVector->at(i));
}
else if (dupICodeVector->at(i)->getOPNType() == InterCode::LABEL) {
// cout << "\nLabel Name = " << goto_lab->getLabel();
start_lab = dupICodeVector->at(i);
insertMap(start_lab->getLabel(), dupICodeVector->at(i));
}
else if (dupICodeVector->at(i)->getOPNType() == InterCode::CALL) {
ExprNode** operands = (ExprNode**)dupICodeVector->at(i)->get3Operands();
//goto_lab = (ExprNode *)operands[0];
InvocationNode *temp = (InvocationNode *)operands[0];
// cout << "\nLabel Name = " << (InvocationNode *)goto_lab->symTabEntry()->name();
insertMap(temp->symTabEntry()->name(), dupICodeVector->at(i));
}
}
}
/****************************************************************************************************************************
* Input :
*
* if a then goto L1
* else goto L2
* L1:
* .... L1 body ........
* L2:
* .... L2 body ........
*
* Output :
*
* if !a then goto L2
* else goto L1
* L1:
* .... L1.body ........
* L2:
* .... L2 body ........
*
*****************************************************************************************************************************/
void InterCodesClass::ifThenElseOpt(int *isOptimized) {
int i;
vector<InterCode*>* dupICodeVector = getICodeVector();
ExprNode* cond;
InterCode* true_lab, *false_lab, *start_lab;
bool flag = false;
for ( i = 0; i < (int )dupICodeVector->size(); i++) {
if (dupICodeVector->at(i)->getOPNType() == InterCode::IFREL) {
ExprNode** operands = (ExprNode**)dupICodeVector->at(i)->get3Operands();
cond = operands[0];
true_lab = cond->OnTrue();
false_lab = cond->OnFalse();
if(false_lab) {
if (dupICodeVector->at(i+1)->getOPNType() == InterCode::LABEL) {
start_lab = dupICodeVector->at(i+1);
if (true_lab->getLabel() == start_lab->getLabel()) {
if (dupICodeVector->at(i)->xchgSubcode()) {
cond->OnTrue(false_lab);
cond->OnFalse(true_lab);
}
}
else if (false_lab->getLabel() == start_lab->getLabel()) {
if (dupICodeVector->at(i)->xchgSubcode()) {
cond->OnTrue(false_lab);
cond->OnFalse(true_lab);
}
}
}
}
}
}
if(flag)
*isOptimized = 1;
}
void InterCodesClass::removeContLabelGoto(int *isOptimized) {
int i;
vector<InterCode*>* dupICodeVector = getICodeVector();
ExprNode* cond;
InterCode* goto_lab, *false_lab, *start_lab;
bool flag = false;
for ( i = 0; i < (int )dupICodeVector->size(); i++) {
if (dupICodeVector->at(i)->getOPNType() == InterCode::GOTO) {
ExprNode** operands = (ExprNode**)dupICodeVector->at(i)->get3Operands();
goto_lab = (InterCode *)operands[0];
// cout << "\nLabel Name = " << goto_lab->getLabel();
if (dupICodeVector->at(i+1)->getOPNType() == InterCode::LABEL) {
start_lab = dupICodeVector->at(i+1);
if (goto_lab->getLabel() == start_lab->getLabel()) {
dupICodeVector->erase(dupICodeVector->begin() + i);
flag = true;
}
}
}
if (dupICodeVector->at(i)->getOPNType() == InterCode::IFREL) {
ExprNode** operands = (ExprNode**)dupICodeVector->at(i)->get3Operands();
cond = operands[0];
false_lab = cond->OnFalse();
if (false_lab) {
//cout << "\nLabel Name = " << false_lab->getLabel();
if (dupICodeVector->at(i+1)->getOPNType() == InterCode::LABEL) {
start_lab = dupICodeVector->at(i+1);
if (false_lab->getLabel() == start_lab->getLabel()) {
cond->OnFalse(NULL);
flag = true;
}
}
}
}
}
if(flag)
*isOptimized = 1;
}
void BasicBlock::constantFolding (int *isOptimized) {
int result = 0, val_1 = 0, val_2 = 0, i;
double resultf = 0.0, valf_1 = 0.0, valf_2 = 0.0;
vector<InterCode*>* dupICodeVector = getICodeVector();
vector<InterCode*>* tempICodeVector = new vector<InterCode*> ();
bool flag = false;
bool isfloat;
// cout << "\t Inside Folding" << dupICodeVector->size();
for ( i = 0; i < (int )dupICodeVector->size(); i++) {
//cout << "\t " << i;
//tempICodeVector->push_back(dupICodeVector->at(i));
ExprNode** operands = (ExprNode**)dupICodeVector->at(i)->get3Operands();
isfloat = false;
if (operands[0] && operands[1] && operands[2]) {
ExprNode* new1 = operands[1];
ExprNode* new2 = operands[2];
//cout << "\t if part";
// Check if op[1] and op[2] are valuenodes and intercode type is expression
if ((new1->exprNodeType() == ExprNode::ExprNodeType::VALUE_NODE) && (new2->exprNodeType() == ExprNode::ExprNodeType::VALUE_NODE)) {
if ((new1->value()->type()->tag() == Type::TypeTag::INT || new1->value()->type()->tag() == Type::TypeTag::UINT) &&
(new2->value()->type()->tag() == Type::TypeTag::INT || new2->value()->type()->tag() == Type::TypeTag::UINT)) {
isfloat = false;
val_1 = stoi(new1->getRefName());
val_2 = stoi(new2->getRefName());
} else if (new1->value()->type()->tag() == Type::TypeTag::DOUBLE || new2->value()->type()->tag() == Type::TypeTag::DOUBLE) {
isfloat = true;
valf_1 = stof(new1->getRefName());
valf_2 = stof(new2->getRefName());
}
if (dupICodeVector->at(i)->getOPNType() == InterCode::OPNTYPE::EXPR) {
//cout << "DEBUG: " << OpNode::opInfo[(int )dupICodeVector->at(i)->getsubCode()].name_;
switch(dupICodeVector->at(i)->getsubCode()) {
case OpNode::OpCode::PLUS :
if(isfloat) resultf = valf_1 + valf_2;
else result = val_1 + val_2;
flag = true;
break;
case OpNode::OpCode::MINUS :
if(isfloat) resultf = valf_1 - valf_2;
else result = val_1 - val_2;
flag = true;
break;
case OpNode::OpCode::MULT :
if(isfloat) resultf = valf_1 * valf_2;
else result = val_1 * val_2;
flag = true;
break;
case OpNode::OpCode::DIV :
if(isfloat) resultf = valf_1 / valf_2;
else result = val_1 / val_2;
flag = true;
break;
case OpNode::OpCode::MOD :
if(!isfloat) { result = val_1 % val_2; flag = true; }
break;
case OpNode::OpCode::BITOR :
if(!isfloat) { result = val_1 | val_2; flag = true; }
break;
case OpNode::OpCode::BITAND :
if(!isfloat) { result = val_1 & val_2; flag = true; }
break;
case OpNode::OpCode::BITXOR :
if(!isfloat) { result = val_1 ^ val_2; flag = true; }
break;
case OpNode::OpCode::SHL :
if(!isfloat) { result = val_1 << val_2; flag = true; }
break;
case OpNode::OpCode::SHR :
if(!isfloat) { result = val_1 >> val_2; flag = true; }
break;
default :
cout << "\nUnhandled OpCode \n";
break;
}
//cout << result << "\n";
ValueNode *temp;
if (isfloat) {
temp = new ValueNode(new Value(resultf));
temp->coercedType(new Type(Type::DOUBLE));
} else {
temp = new ValueNode(new Value(result, Type::INT));
}
tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::EXPR,
OpNode::OpCode::ASSIGN, operands[0], temp));
} else if (dupICodeVector->at(i)->getOPNType() == InterCode::OPNTYPE::IFREL) {
//bool cond = false;
//switch(dupICodeVector->at(i)->getsubCode()) {
// case OpNode::OpCode::EQ:
// if(!isfloat) cond = (val_1 == val_2);
// else cond = (valf_1 == valf_2);
// break;
// case OpNode::OpCode::NE:
// if(!isfloat) cond = (val_1 != val_2);
// else cond = (valf_1 != valf_2);
// break;
// case OpNode::OpCode::GE:
// if(!isfloat) cond = (val_1 >= val_2);
// else cond = (valf_1 >= valf_2);
// break;
// case OpNode::OpCode::LE:
// if(!isfloat) cond = (val_1 <= val_2);
// else cond = (valf_1 <= valf_2);
// break;
// case OpNode::OpCode::GT:
// if(!isfloat) cond = (val_1 > val_2);
// else cond = (valf_1 > valf_2);
// break;
// case OpNode::OpCode::LT:
// if(!isfloat) cond = (val_1 < val_2);
// else cond = (valf_1 < valf_2);
// break;
// default :
// break;
//}
//If condition is true then directly goto to op[0]
//TODO: please fix the following GOTO
// if (cond) {
// flag = true;
// tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::GOTO,
// OpNode::OpCode::INVALID, operands[0]->OnTrue()));
// } else {
// flag = true;
// if (operands[0]->OnFalse()) {
// tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::GOTO,
// OpNode::OpCode::INVALID, operands[0]->OnFalse()));
// }
// }
tempICodeVector->push_back(dupICodeVector->at(i));
} else {
tempICodeVector->push_back(dupICodeVector->at(i));
}
} else {
tempICodeVector->push_back(dupICodeVector->at(i));
}
} else {
if (dupICodeVector->at(i)->getOPNType() == InterCode::OPNTYPE::EXPR) {
switch(dupICodeVector->at(i)->getsubCode()){
case OpNode::OpCode::BITNOT : {
//special case where third operand is null
ExprNode* new1 = operands[1];
if (new1->exprNodeType() == ExprNode::ExprNodeType::VALUE_NODE) {
if ((new1->value()->type()->tag() == Type::TypeTag::INT || new1->value()->type()->tag() == Type::TypeTag::UINT)) {
flag = true;
int val = stoi(new1->getRefName());
ValueNode *temp = new ValueNode(new Value(~val, Type::INT));
tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::EXPR, OpNode::OpCode::ASSIGN, operands[0], temp));
} else {
tempICodeVector->push_back(dupICodeVector->at(i));
}
} else {
tempICodeVector->push_back(dupICodeVector->at(i));
}
break;
}
case OpNode::OpCode::NOT : {
ExprNode* new1 = operands[1];
if ((new1->exprNodeType() == ExprNode::ExprNodeType::VALUE_NODE) &&
(new1->value()->type()->tag() == Type::TypeTag::BOOL)) {
flag = true;
bool val = false;
if (new1->getRefName().compare("1") == 0)
val = true;
ValueNode *temp = new ValueNode(new Value(!val));
tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::EXPR, OpNode::OpCode::ASSIGN, operands[0], temp));
} else {
tempICodeVector->push_back(dupICodeVector->at(i));
}
break;
}
default: tempICodeVector->push_back(dupICodeVector->at(i));
break;
}
} else {
tempICodeVector->push_back(dupICodeVector->at(i));
}
}
}
setICodeVector(tempICodeVector);
if(flag)
*isOptimized = 1;
}
/***************************************************************************************************************
* 3 Address Code :
*
* a := 6
* __vreg0 := c + a
*
* Code Optimized : Constant Propagation
*
* a := 6
* __vreg0 := c + 6
*
* **************************************************************************************************************/
void BasicBlock::constantPropogation (int *isOptimized) {
//cout <<"\n ENTER " << this->getBlockLabel() << " Size = " << dupICodeVector->size() << "\n";
map <string, ExprNode*> cvar_map;
vector<InterCode*>* dupICodeVector = getICodeVector();
vector<InterCode*>::iterator it = dupICodeVector->begin();
vector<InterCode*>* tempICodeVector = new vector<InterCode*> ();
bool flag = false;
for (; it != dupICodeVector->end(); it++) {
ExprNode** op = (ExprNode**)(*it)->get3Operands();
if (op[0] == NULL)
{
tempICodeVector->push_back(*it);
continue;
}
//Node of type EXPR and op[0] = op[1] , op[2] is NULL
if ((*it)->getOPNType() == InterCode::OPNTYPE::EXPR &&
(*it)->getsubCode() == OpNode::OpCode::ASSIGN && op[1] &&
op[1]->exprNodeType() == ExprNode::ExprNodeType::VALUE_NODE) {
//if variable already exists in map
string str = op[0]->getRefName();
//cout << "\n string: "<< str;
if (cvar_map.find(str) != cvar_map.end()) {
cvar_map.erase(str);
}
cvar_map.insert(pair<string, ExprNode*>(str, (ValueNode *)op[1]));
//cout << "\n line 1 debug: str" << op[1]->getRefName();
}
switch ((*it)->getOPNType()) {
case InterCode::OPNTYPE::EXPR : {
ExprNode** oprnd = (ExprNode**)(*it)->get3Operands();
switch ((*it)->getsubCode()) {
case OpNode::OpCode::PLUS:
case OpNode::OpCode::MINUS:
case OpNode::OpCode::MULT:
case OpNode::OpCode::DIV:
case OpNode::OpCode::MOD:
case OpNode::OpCode::SHL:
case OpNode::OpCode::SHR:
case OpNode::OpCode::AND:
case OpNode::OpCode::OR:
case OpNode::OpCode::EQ:
case OpNode::OpCode::NE:
case OpNode::OpCode::GT:
case OpNode::OpCode::LT:
case OpNode::OpCode::GE:
case OpNode::OpCode::LE:
case OpNode::OpCode::BITOR:
case OpNode::OpCode::BITAND:
case OpNode::OpCode::BITXOR:
{
//iterate over map. check and replace op[0] and op[1] value
if (cvar_map.find(oprnd[1]->getRefName()) != cvar_map.end()) {
oprnd[1] = cvar_map.find(oprnd[1]->getRefName())->second;
flag = true;
}
if (cvar_map.find(oprnd[2]->getRefName()) != cvar_map.end()) {
oprnd[2] = cvar_map.find(oprnd[2]->getRefName())->second;
flag = true;
}
}
break;
case OpNode::OpCode::BITNOT:
case OpNode::OpCode::UMINUS:
case OpNode::OpCode::NOT:
{
//TODO: please fix this magic code
oprnd[1]->type()->name();
if (cvar_map.find(oprnd[1]->getRefName()) != cvar_map.end()) {
oprnd[1] = cvar_map.find(oprnd[1]->getRefName())->second;
flag = true;
}
}
break;
case OpNode::OpCode::ASSIGN:
{
//TODO: please fix this magic code
oprnd[1]->type()->name();
if (cvar_map.find(oprnd[1]->getRefName()) != cvar_map.end()) {
oprnd[1] = cvar_map.find(oprnd[1]->getRefName())->second;
flag = true;
cvar_map.insert(pair<string, ExprNode*>(oprnd[0]->getRefName(), (ValueNode *)op[1]));
}
}
break;
default : break;
}
tempICodeVector->push_back(new InterCode (InterCode::OPNTYPE::EXPR,
(*it)->getsubCode(), oprnd[0], oprnd[1], oprnd[2]));
}
break;
// case InterCode::OPNTYPE::IFREL : {
// ExprNode** oprnd = (ExprNode**)(*it)->get3Operands();
// if (op[0] && op[1] == NULL && op[2] == NULL) {
// if (cvar_map.find(oprnd[0]->getRefName()) != cvar_map.end()) {
// oprnd[0] = cvar_map.find(oprnd[0]->getRefName())->second;
// flag = true;
// }
// } else {
// if (op[1]) {
// if (cvar_map.find(oprnd[1]->getRefName()) != cvar_map.end()) {
// oprnd[1] = cvar_map.find(oprnd[1]->getRefName())->second;
// flag = true;
// }
// }
// if (op[2]) {
// if (cvar_map.find(oprnd[2]->getRefName()) != cvar_map.end()) {
// oprnd[2] = cvar_map.find(oprnd[2]->getRefName())->second;
// flag = true;
// }
// }
// }
// tempICodeVector->push_back(new InterCode (InterCode::OPNTYPE::IFREL,
// (*it)->getsubCode(), oprnd[0], oprnd[1], oprnd[2]));
// }
// break;
default :
tempICodeVector->push_back(*it);
break;
}/*end outer switch*/
}/*end for*/
//cout <<"\n Exit " << this->getBlockLabel() << " Size = " << tempICodeVector->size() << "\n";
setICodeVector(tempICodeVector);
if(flag)
*isOptimized = 1;
}
void BasicBlock::redundantGotoRemoval(int *isOptimized) {
unsigned int i = 0;
vector<InterCode*>* dupICodeVector = getICodeVector();
vector<InterCode*>* tempICodeVector = new vector<InterCode*> ();
InterCode* gotoStart;
bool flag = false;
//cout <<"\n ENTER " << this->getBlockLabel() << " Size = " << dupICodeVector->size() << "\n";
for (i = 0; i < dupICodeVector->size(); i++) {
gotoStart = dupICodeVector->at(i);
while (dupICodeVector->at(i)->getOPNType() == InterCode::OPNTYPE::GOTO) {
i++;
if ( i == dupICodeVector->size())
break;
}
tempICodeVector->push_back(gotoStart);
}/*end for*/
setICodeVector(tempICodeVector);
if (flag)
*isOptimized = 1;
//cout <<"\n Exit " << this->getBlockLabel() << " Size = " << tempICodeVector->size() << "\n";
}
void BasicBlock::zeroRemoval(int *isOptimized) {
int i;
vector<InterCode*>* dupICodeVector = getICodeVector();
vector<InterCode*>* tempICodeVector = new vector<InterCode*> ();
bool flag = false;
for ( i = 0; i < (int )dupICodeVector->size(); i++) {
//tempICodeVector->push_back(dupICodeVector->at(i));
ExprNode** operands = (ExprNode**)dupICodeVector->at(i)->get3Operands();
ExprNode *new1, *new2;
if (operands[0] && operands[1] && operands[2]) {
new1 = operands[1];
new2 = operands[2];
// Check if op[1] is valuenode and op[2] is not value and intercode type is expression
if (dupICodeVector->at(i)->getOPNType() == InterCode::OPNTYPE::EXPR) {
if ((new2->exprNodeType() == ExprNode::ExprNodeType::VALUE_NODE) &&
(new1->exprNodeType() != ExprNode::ExprNodeType::VALUE_NODE)) {
if (((new2->value()->type()->tag() == Type::TypeTag::INT ||
new2->value()->type()->tag() == Type::TypeTag::UINT) && (new2->value()->ival() == 0))
|| ((new2->value()->type()->tag() == Type::TypeTag::DOUBLE) && (new2->value()->dval() == 0.0))) {
switch(dupICodeVector->at(i)->getsubCode()) {
case OpNode::OpCode::PLUS :
case OpNode::OpCode::MINUS :
tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::EXPR,
OpNode::OpCode::ASSIGN, operands[0], new1));
flag = true;
break;
case OpNode::OpCode::MULT :
tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::EXPR,
OpNode::OpCode::ASSIGN, operands[0], new2));
flag = true;
break;
default :
tempICodeVector->push_back(dupICodeVector->at(i));
break;
}
}
else
tempICodeVector->push_back(dupICodeVector->at(i));
}
else if ((new1->exprNodeType() == ExprNode::ExprNodeType::VALUE_NODE) &&
(new2->exprNodeType() != ExprNode::ExprNodeType::VALUE_NODE)) {
if (((new1->value()->type()->tag() == Type::TypeTag::INT ||
new1->value()->type()->tag() == Type::TypeTag::UINT) && (new1->value()->ival() == 0))
|| ((new1->value()->type()->tag() == Type::TypeTag::DOUBLE) && (new1->value()->dval() == 0.0))) {
switch(dupICodeVector->at(i)->getsubCode()) {
case OpNode::OpCode::PLUS :
tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::EXPR,
OpNode::OpCode::ASSIGN, operands[0], new2));
flag = true;
break;
case OpNode::OpCode::MULT :
tempICodeVector->push_back(new InterCode(InterCode::OPNTYPE::EXPR,
OpNode::OpCode::ASSIGN, operands[0], new1));
flag = true;
break;
default :
tempICodeVector->push_back(dupICodeVector->at(i));
break;
}
}
else
tempICodeVector->push_back(dupICodeVector->at(i));
}
else
tempICodeVector->push_back(dupICodeVector->at(i));
}
else
tempICodeVector->push_back(dupICodeVector->at(i));
}
else if ((operands[0]) && (operands[1])) {
/* TODO : Remove self (dead) assignment by not pushing */
if ((dupICodeVector->at(i)->getOPNType() == InterCode::OPNTYPE::EXPR) &&
(operands[0]->exprNodeType() != ExprNode::ExprNodeType::VALUE_NODE) &&
(operands[1]->exprNodeType() != ExprNode::ExprNodeType::VALUE_NODE)) {
if (operands[0]->getRefName() == operands[1]->getRefName()) {
flag = true;
}
else
tempICodeVector->push_back(dupICodeVector->at(i));
}
else
tempICodeVector->push_back(dupICodeVector->at(i));
}
else
tempICodeVector->push_back(dupICodeVector->at(i));
}
setICodeVector(tempICodeVector);
//cout << "\nReturned \n";
if (flag)
*isOptimized = 1;
}
void BasicBlock::print(ostream &os) {
os << endl;
os << blocklabel << ":" << endl;
prtSpace(os, TAB_SPACE);
os << "Prev: (";
vector<string>::iterator iter = PrevBlockLabels.begin();
for ( ; iter != PrevBlockLabels.end(); ++iter) {
os << " " << *iter;
}
os << " )\n\n";
vector <InterCode*>::iterator it = InterCodeVector.begin();
for (; it != InterCodeVector.end(); ++it) {
(*it)->print(os);
os << endl;
}
os << endl;
prtSpace(os, TAB_SPACE);
os << "next: (";
iter = NextBlockLabels.begin();
for ( ; iter != NextBlockLabels.end(); ++iter) {
os << " " << *iter;
}
os << " )\n";
}
void InterCodesClass::addCode (InterCode *code) {
if (code != NULL)
InterCodeVector.push_back(code);
}
void InterCodesClass::addCode (InterCodesClass* code) {
if (code != NULL) {
vector <InterCode*> code_l = code->InterCodeVector;
for (int i = 0; i < (int )code_l.size(); ++i)
InterCodeVector.push_back(code_l.at(i));
}
}
void InterCodesClass::addCode (InterCode::OPNTYPE op, void *a,
void *b, void *c, OpNode::OpCode subopc) {
InterCodeVector.push_back(new InterCode (op, subopc, a, b, c));
}
void InterCodesClass::print (ostream &os) {
vector <InterCode*>::iterator it = InterCodeVector.begin();
for (; it != InterCodeVector.end(); ++it) {
(*it)->print(os);
os << endl;
}
}
BasicBlock* BasicBlocksClass::getBlockWithLabel (string label) {
vector <BasicBlock*>::iterator it = bbVector.begin();
for (; it != bbVector.end(); ++it) {
if (label.compare((*it)->getBlockLabel()) == 0)
return (*it);
}
//if block does not exist,then create block with new label
BasicBlock *newbb = new BasicBlock(label);
bbVector.push_back(newbb);
label_block_map.insert(pair<string, BasicBlock*> (label, newbb));
return newbb;
}
void BasicBlocksContainer::removeBlocks() {
map <string, BasicBlocksClass*>::iterator it = bbContainer.begin();
for (; it != bbContainer.end(); ++it) {
if ((bbUsedContainers.count((*it).first) == 0) && (((*it).first).compare("global") != 0) && (((*it).first).substr(0, 7) != E_PREFIX)) {
bbContainer.erase(it);
}
}
}
BasicBlocksClass* BasicBlocksContainer::insertInContainer (string name) {
if (bbContainer.find(name) == bbContainer.end()) {
BasicBlocksClass* bbCls = new BasicBlocksClass();
bbContainer.insert (pair<string, BasicBlocksClass*> (name, bbCls));
return bbCls;
} else {
return bbContainer.find(name)->second;
}
}
void BasicBlocksContainer::optimize() {
removeBlocks();
if (debugLevel > 0) {
cout << "\n\n===== Uncalled Functions Removal Optimization =======";
//printUsedContainers();
print(cout);
}
map <string, BasicBlocksClass*>::iterator it = bbContainer.begin();
for (; it != bbContainer.end(); ++it) {
(*it).second->blockOptimize();
}
if (debugLevel > 0) {
cout << "\n\n=====Constant propogation and folding optimization=======";
print(cout);
}
for (it = bbContainer.begin() ; it != bbContainer.end(); ++it) {
//no need of live var analysis for global
if ((*it).first.compare("global") != 0)
(*it).second->liveVariableAnalysis();
}
if (debugLevel > 0) {