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ast.cpp
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ast.cpp
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#include "ast.h"
#include <iostream>
#include <set>
#include "asm.h"
#include <sstream>
template <typename Base, typename T>
inline bool instanceof (const T *)
{
return is_base_of<Base, T>::value;
}
class ContextStack
{
public:
struct ContextStack *prev;
map<string, Type> variables;
};
class VariableInfo
{
public:
VariableInfo(int offset, bool isArray, bool isParameter, Type type)
{
this->offset = offset;
this->isArray = isArray;
this->isParameter = isParameter;
this->type = type;
}
int offset;
bool isArray;
bool isParameter;
Type type;
};
class FunctionInfo
{
public:
Type returnType;
list<Parameter *> parameters;
};
const char *intTemps[] = {"$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", "$t9"};
const char *floatTemps[] = {"$f0",
"$f1",
"$f2",
"$f3",
"$f4",
"$f5",
"$f6",
"$f7",
"$f8",
"$f9",
"$f10",
"$f11",
"$f12",
"$f13",
"$f14",
"$f15",
"$f16",
"$f17",
"$f18",
"$f19",
"$f20",
"$f21",
"$f22",
"$f23",
"$f24",
"$f25",
"$f26",
"$f27",
"$f28",
"$f29",
"$f30",
"$f31"};
#define INT_TEMP_COUNT 10
#define FLOAT_TEMP_COUNT 32
set<string> intTempMap;
set<string> floatTempMap;
set<string> boolTempMap;
ContextStack *context = NULL;
extern Asm assemblyFile;
int globalStackPointer = 0;
map<string, VariableInfo *> codeGenerationVars;
int labelCounter = 0;
map<string, Type> globalVariables = {};
map<string, Type> variables;
map<string, FunctionInfo *> methods;
map<string, Type> resultTypes = {
{"INT,INT", INT},
{"FLOAT32,FLOAT32", FLOAT32},
{"INT,FLOAT32", FLOAT32},
{"FLOAT32,INT", FLOAT32},
{"STRING,STRING", STRING},
{"BOOL,BOOL", BOOL},
};
map<string, Type> typesCompatibles = {
{"INT_ARRAY,INT", INT},
{"FLOAT32_ARRAY,FLOAT32", FLOAT32},
{"STRING_ARRAY,STRING", STRING},
{"BOOL_ARRAY,BOOL", BOOL},
};
Type typeValid[]={INT,FLOAT32};
Type typeValidBool[]={BOOL};
map<string, Type> semanticArithmetic = {
{"+", INT},
{"-", INT},
{"*", INT},
{"/", INT},
{"%", INT},
{"=", INT},
{"+=", INT },
{"-=", INT },
{"%", INT},
{"+", FLOAT32},
{"-", FLOAT32},
{"*", FLOAT32},
{"/", FLOAT32},
{"%", FLOAT32},
{"=", FLOAT32},
{"+=", FLOAT32 },
{"-=", FLOAT32 },
{"%", FLOAT32},
{"&&", BOOL },
{"||", BOOL},
};
string saveState()
{
set<string>::iterator it = floatTempMap.begin();
stringstream ss;
ss << "sw $ra, " << globalStackPointer << "($sp)\n";
globalStackPointer += 4;
return ss.str();
}
string retrieveState(string state)
{
std::string::size_type n = 0;
string s = "sw";
while ((n = state.find(s, n)) != std::string::npos)
{
state.replace(n, s.size(), "lw");
n += 2;
globalStackPointer -= 4;
}
return state;
}
Type functionType;
string continueLabel;
string getIntTemp()
{
for (int i = 0; i < INT_TEMP_COUNT; i++)
{
if (intTempMap.find(intTemps[i]) == intTempMap.end())
{
intTempMap.insert(intTemps[i]);
return string(intTemps[i]);
}
}
cout << "No more int registers!" << endl;
// exit(1);
return "";
}
string getNewLabel(string prefix)
{
stringstream ss;
ss << prefix << labelCounter;
labelCounter++;
return ss.str();
}
Type getLocalVariableType(string id)
{
ContextStack *currContext = context;
while (currContext != NULL)
{
if (currContext->variables[id] != 0)
return currContext->variables[id];
currContext = currContext->prev;
}
if (!context->variables.empty())
return context->variables[id];
return INVALID;
}
string getFloatTemp()
{
for (int i = 0; i < FLOAT_TEMP_COUNT; i++)
{
if (floatTempMap.find(floatTemps[i]) == floatTempMap.end())
{
floatTempMap.insert(floatTemps[i]);
return string(floatTemps[i]);
}
}
cout << "No more float registers!" << endl;
// exit(1);
return "";
}
string getBoolTemp()
{
for (int i = 0; i < INT_TEMP_COUNT; i++)
{
if (boolTempMap.find(intTemps[i]) == boolTempMap.end())
{
boolTempMap.insert(intTemps[i]);
return string(intTemps[i]);
}
}
cout << "No more bool registers!" << endl;
return "";
}
void releaseIntTemp(string temp)
{
intTempMap.erase(temp);
}
void releaseFloatTemp(string temp)
{
floatTempMap.erase(temp);
}
void releaseRegister(string temp)
{
releaseIntTemp(temp);
releaseFloatTemp(temp);
}
bool isArray(Type type)
{
if (type == INT_ARRAY || type == FLOAT32_ARRAY || type == STRING_ARRAY || type == BOOL_ARRAY)
{
return true;
}
return false;
}
string getTypeName(Type type)
{
switch (type)
{
case INT:
return "INT";
case STRING:
return "STRING";
case BOOL:
return "BOOL";
case FLOAT32:
return "FLOAT32";
case INT_ARRAY:
return "INT_ARRAY";
case FLOAT32_ARRAY:
return "FLOAT32_ARRAY";
case BOOL_ARRAY:
return "BOOL_ARRAY";
case STRING_ARRAY:
return "STRING_ARRAY";
case VOID:
return "VOID";
}
cout << "Unknown type" << endl;
exit(0);
}
void pushContext()
{
variables.clear();
ContextStack *c = new ContextStack();
c->variables = variables;
c->prev = context;
context = c;
}
void popContext()
{
if (context != NULL)
{ //////////////if(bool){ context->previous
ContextStack *previous = context->prev; /////////////////while(bool){ context->actual
free(context); /////////////////////statement ------------libero el actual y regreso al anterior
context = previous; //////////////////}
} ///////////////}
}
Type getVariableType(string id)
{
if (!globalVariables.empty())
return globalVariables[id];
return INVALID;
}
bool variableExists(string id)
{
Type value;
if (context != NULL)
{
value = getLocalVariableType(id);
// context->variables[id] != 0
if (value != 0)
return true;
}
return false;
}
bool globalVariableExists(string id)
{
Type value;
if (!globalVariables.empty())
{
value = getVariableType(id);
if (value != 0)
return true;
}
return false;
}
int BlockStatement::evaluateSemantic()
{
// cout << "BlockStatement" << endl;
list<Declaration *>::iterator itd = this->declarations.begin();
while (itd != this->declarations.end())
{
Declaration *dec = *itd;
// cout<<"Tipo: "<<dec->type<<endl;
if (dec != NULL)
{
dec->evaluateSemantic();
}
itd++;
}
list<Statement *>::iterator its = this->statements.begin();
while (its != this->statements.end())
{
Statement *stmt = *its;
if (stmt != NULL)
{
// if (stmt->getKind() == RETURN_STATEMENT)
// {
// //BlockStatement *block = (BlockStatement *)stmt;
// //block->evaluateSemantic();
// cout<<"RETURN STATEMENT"<<endl;
// }
stmt->evaluateSemantic();
}
its++;
}
return 0;
}
int Declaration::evaluateSemantic()
{
if (!variableExists(this->id) && !globalVariableExists(this->id))
{
context->variables[this->id] = this->type;
}
else
{
cout << "variable: " << this->id << " type: " << getTypeName(this->type) << " already exists" << endl;
exit(0);
}
list<InitDeclarator *>::iterator it = this->declarations.begin();
while (it != this->declarations.end())
{
InitDeclarator *declaration = (*it);
if (declaration->initializer != NULL)
{
list<Expr *>::iterator ite = declaration->initializer->expressions.begin();
while (ite != declaration->initializer->expressions.end())
{
Type exprType = (*ite)->getType();
if (Expr *v = dynamic_cast<MethodInvocationExpr *>((*ite)))
{
if (this->type != exprType)
{
cout << "Assignation error: " << getTypeName(this->type) << " != " << getTypeName(exprType) << endl;
exit(0);
}
}
else
{
if (isArray(this->type))
{
// cout<<declaration->type <<" "<<exprType<<endl;
if (declaration->type == exprType)
{
Type resultType = typesCompatibles[getTypeName(this->type) + "," + getTypeName(exprType)];
if (resultType == 0)
{
cout << "Type1: " << getTypeName(this->type) << " and " << getTypeName(exprType) << " are not compatible" << endl;
exit(0);
}
}
else
{
cout << "Type2: " << getTypeName(exprType) << " and " << getTypeName(declaration->type) << " are not compatible" << endl;
exit(0);
}
}
else
{
// cout<<
if (getTypeName(exprType) != getTypeName(this->type))
{
cout << "error: invalid conversion from: " << getTypeName(exprType) << " to " << getTypeName(this->type) << " line: " << this->line << endl;
exit(0);
}
}
}
ite++;
}
}
it++;
}
return 0;
}
int GlobalDeclaration::evaluateSemantic()
{
// cout<<"GlobalDeclaration"<<endl;
if (!globalVariableExists(this->declaration->id))
{
globalVariables[this->declaration->id] = this->declaration->type;
}
else
{
cout << "variable: " << this->declaration->id << " type: " << getTypeName(this->declaration->type) << " already exists" << endl;
exit(0);
}
// cout<<"id: "<<*itList<<endl;
list<InitDeclarator *>::iterator it = this->declaration->declarations.begin();
while (it != this->declaration->declarations.end())
{
InitDeclarator *declaration = (*it);
if (declaration->initializer != NULL)
{
list<Expr *>::iterator ite = declaration->initializer->expressions.begin();
while (ite != declaration->initializer->expressions.end())
{
Type exprType = (*ite)->getType();
if (isArray(this->declaration->type))
{
if (declaration->type == exprType)
{
Type resultType = typesCompatibles[getTypeName(this->declaration->type) + "," + getTypeName(exprType)];
if (resultType == 0)
{
cout << "Type: " << getTypeName(this->declaration->type) << " and " << getTypeName(exprType) << " are not compatible" << endl;
exit(0);
}
}
else
{
cout << "Type: " << getTypeName(exprType) << " and " << getTypeName(declaration->type) << " are not compatible" << endl;
exit(0);
}
}
else
{
if (getTypeName(exprType) != getTypeName(this->declaration->type))
{
cout << "error: invalid conversion from: " << getTypeName(exprType) << " to " << getTypeName(this->declaration->type) << " line: " << this->line << endl;
exit(0);
}
}
ite++;
}
}
it++;
}
return 0;
}
void addMethodDeclaration(string id, int line, Type type, ParameterList params)
{
if (methods[id] != 0)
{
cout << "redefinition of function " << id << " in line: " << line << endl;
exit(0);
}
methods[id] = new FunctionInfo();
methods[id]->returnType = type;
methods[id]->parameters = params;
}
int MethodDefinition::evaluateSemantic()
{
if (this->params.size() > 4)
{
cout << "Method: " << this->id << " can't have more than 4 parameters, line: " << this->line << endl;
exit(0);
}
// cout<<this->type<<endl;
addMethodDeclaration(this->id, this->line, this->type, this->params);
pushContext();
list<Parameter *>::iterator it = this->params.begin();
while (it != this->params.end())
{
(*it)->evaluateSemantic();
it++;
}
if (this->statement != NULL)
{
functionType = this->type;
this->statement->evaluateSemantic();
}
popContext();
return 0;
}
Type IntExpr::getType()
{
return INT;
}
Type FloatExpr::getType()
{
return FLOAT32;
}
Type BoolExpr::getType()
{
return BOOL;
}
Type StringExpr::getType()
{
return STRING;
}
#define IMPLEMENT_BINARY_GET_TYPE(name, op) \
Type name##Expr::getType() \
{ \
string leftType = getTypeName(this->expr1->getType()); \
string rightType = getTypeName(this->expr2->getType()); \
Type resultType = resultTypes[leftType + "," + rightType]; \
if (resultType == 0) \
{ \
cerr << "Error: type1 " << leftType << " can't be converted to type " << rightType << " line: " << this->line << endl; \
exit(0); \
} \
if (semanticArithmetic[op] != this->expr1->getType() && semanticArithmetic[op] != this->expr2->getType()) \
{ \
cerr << "Error: type1 " << leftType << " cannot execute aritmethic: "<< op << " on " << rightType \
<< " line: " << this->line << endl; \
exit(0); \
} \
return resultType; \
}
#define IMPLEMENT_BINARY_BOOLEAN_GET_TYPE(name, condition) \
Type name##Expr::getType() \
{ \
string leftType = getTypeName(this->expr1->getType()); \
string rightType = getTypeName(this->expr2->getType()); \
Type resultType = resultTypes[leftType + "," + rightType]; \
if (resultType == 0) \
{ \
cerr << "Error: type2 " << leftType << " can't be converted to type " << rightType << " line: " << this->line << endl; \
exit(0); \
} \
if (condition == "&&" || condition == "||") \
{ \
if (semanticArithmetic[condition] != this->expr1->getType() && semanticArithmetic[condition] != this->expr2->getType()) \
{ \
cerr << "Error: type2 " << leftType << " cannot execute aritmethic: "<< condition<<" on " << rightType \
<< " line: " << this->line << endl; \
exit(0); \
} \
} \
return BOOL; \
}
Type getUnaryType(Type expressionType, int unaryOperation)
{
switch (unaryOperation)
{
case INCREMENT:
case DECREMENT:
if (expressionType == INT || expressionType == FLOAT32)
return expressionType;
case NOT:
if (expressionType == BOOL)
return BOOL;
}
cerr << "Error: Invalid type" << endl;
exit(0);
return INVALID;
}
int Parameter::evaluateSemantic()
{
if (!variableExists(this->declarator->id))
{
context->variables[declarator->id] = this->type;
}
else
{
cout << "error: redefinition of variable: " << declarator->id << " line: " << this->line << endl;
exit(0);
}
return 0;
}
Type UnaryExpr::getType()
{
Type exprType = this->expr->getType();
return getUnaryType(exprType, this->type);
// return INVALID;
}
Type ArrayExpr::getType()
{
Type resultType = typesCompatibles[getTypeName(this->id->getType()) + "," + getTypeName(this->expr->getType())];
return resultType;
}
Type IdExpr::getType()
{
Type value;
if (context != NULL)
{
value = getLocalVariableType(this->id);
if (value != 0)
return value;
}
value = getVariableType(this->id);
if (value == 0)
{
cout << "error: '" << this->id << "' was not declared in this scope line: " << this->line << endl;
exit(0);
}
return value;
// return INVALID;
}
Type MethodInvocationExpr::getType()
{
FunctionInfo *func = methods[this->id->id];
if (func == NULL)
{
cout << "error: function " << this->id->id << " not found, line: " << this->line << endl;
exit(0);
}
Type funcType = func->returnType;
if (func->parameters.size() > this->args.size())
{
cout << "error: to few arguments to function" << this->id->id << " line: " << this->line << endl;
exit(0);
}
if (func->parameters.size() < this->args.size())
{
cout << "error: to many arguments to function " << this->id->id << " line: " << this->line << endl;
exit(0);
}
list<Parameter *>::iterator paramIt = func->parameters.begin();
list<Expr *>::iterator argsIt = this->args.begin();
while (paramIt != func->parameters.end() && argsIt != this->args.end())
{
string paramType = getTypeName((*paramIt)->type);
string argType = getTypeName((*argsIt)->getType());
// cout<< "Parametro "<<paramType<<endl;
// cout<< "Argumento "<<argType<<endl;
if (paramType != argType)
{
cout << "error: invalid conversion from: " << argType << " to " << paramType << " line: " << this->line << endl;
exit(0);
}
paramIt++;
argsIt++;
}
return funcType;
// return INVALID;
}
Type PostIncrementExpr::getType()
{
Type idType = this->expr->getType();
switch (idType)
{
case INT:
case FLOAT32:
return this->expr->getType();
}
cout << "Cannot increment a variable type: " << getTypeName(idType) << endl;
exit(0);
}
Type PostDecrementExpr::getType()
{
Type idType = this->expr->getType();
switch (idType)
{
case INT:
case FLOAT32:
return this->expr->getType();
}
cout << "Cannot decrement a variable type: " << getTypeName(idType) << endl;
exit(0);
}
int ElseStatement::evaluateSemantic()
{
if (this->conditionalExpr->getType() != BOOL)
{
cout << "Expression for if must be boolean";
exit(0);
}
pushContext();
this->trueStatement->evaluateSemantic();
popContext();
pushContext();
if (this->falseStatement != NULL)
this->falseStatement->evaluateSemantic();
popContext();
return 0;
}
int IfStatement::evaluateSemantic()
{
if (this->conditionalExpr->getType() != BOOL)
{
cout << "Expression for if must be boolean";
exit(0);
}
pushContext();
this->trueStatement->evaluateSemantic();
popContext();
return 0;
}
int ExprStatement::evaluateSemantic()
{
return this->expr->getType();
}
int ReturnStatement::evaluateSemantic()
{
if (this->expr->getType() != functionType)
{
cout << "error: function type: " << getTypeName(functionType) << " cannot return a variable type: " << getTypeName(this->expr->getType()) << " line: " << this->expr->line << endl;
exit(0);
}
return this->expr->getType();
}
int BreakStatement::evaluateSemantic()
{
return 0;
}
int ContinueStatement::evaluateSemantic()
{
return 0;
}
int PrintStatement::evaluateSemantic()
{
if (this->expr->getType() == INVALID)
{
cout << "Error: Print statement must be have a TYPE\n";
exit(0);
}
return this->expr->getType();
}
int ImportDeclaration::evaluateSemantic()
{
return 0;
}
int PackageDeclaration::evaluateSemantic()
{
return 0;
}
int ForStatement::evaluateSemantic()
{
if (this->declarator != NULL)
{
if (!variableExists(this->declarator->id))
{
context->variables[declarator->id] = this->declarator->arrayDeclaration->getType();
}
}
if (this->expressionLeft != NULL)
{
if (this->expressionLeft->getType() != BOOL)
{
cout << "Error: expression in declaration 'for' must be boolean in line: " << this->line << endl;
exit(0);
}
}
if (this->expressionRight != NULL)
{
if (this->expressionRight->getType() != INT && this->expressionRight->getType() != FLOAT32)
{
cout << "Error: expression in declaration 'for' must be int or float32 in line: " << this->line << endl;
exit(0);
}
}
pushContext();
if (this->statement != NULL)
{
this->statement->evaluateSemantic();
}
popContext();
return 0;
}
/////////////////////
string intArithmetic(Code &leftCode, Code &rightCode, Code &code, char op)
{
stringstream ss;
code.place = getIntTemp();
switch (op)
{
case '+':
ss << "add " << code.place << ", " << leftCode.place << ", " << rightCode.place;
break;
case '-':
ss << "sub " << code.place << ", " << leftCode.place << ", " << rightCode.place;
break;
case '*':
ss << "mult " << leftCode.place << ", " << rightCode.place << endl
<< "mflo " << code.place;
break;
case '/':
ss << "div " << leftCode.place << ", " << rightCode.place << endl
<< "mflo " << code.place;
break;
default:
break;
}
return ss.str();
}
string floatArithmetic(Code &leftCode, Code &rightCode, Code &code, char op)
{
stringstream ss;
code.place = getFloatTemp();
switch (op)
{
case '+':
ss << "add.s " << code.place << ", " << leftCode.place << ", " << rightCode.place;
break;
case '-':
ss << "sub.s " << code.place << ", " << leftCode.place << ", " << rightCode.place;
break;
case '*':
ss << "mul.s " << code.place << ", " << leftCode.place << ", " << rightCode.place;
break;
case '/':
ss << "div.s " << code.place << ", " << leftCode.place << ", " << rightCode.place;
break;
default:
break;
}
return ss.str();
}
string MethodDefinition::genCode()
{ /// done
if (this->statement == NULL)
return "";
int stackPointer = 4;
globalStackPointer = 0;
stringstream code;
code << this->id << ": " << endl;
string state = saveState();
code << state << endl;
if (this->params.size() > 0)
{
list<Parameter *>::iterator it = this->params.begin();
for (int i = 0; i < this->params.size(); i++)
{
code << "sw $a" << i << ", " << stackPointer << "($sp)" << endl;
codeGenerationVars[(*it)->declarator->id] = new VariableInfo(stackPointer, false, true, (*it)->type);
if(isArray((*it)->type)){
codeGenerationVars[(*it)->declarator->id] = new VariableInfo(stackPointer, true, true, (*it)->type);
}else{
codeGenerationVars[(*it)->declarator->id] = new VariableInfo(stackPointer, false, true, (*it)->type);
}
stackPointer += 4;
globalStackPointer += 4;
it++;
}
}
code << this->statement->genCode() << endl;
stringstream sp;
int currentStackPointer = globalStackPointer;
sp << endl
<< "addiu $sp, $sp, -" << currentStackPointer << endl;
code << retrieveState(state);
code << "addiu $sp, $sp, " << currentStackPointer << endl;
code << "jr $ra" << endl;
codeGenerationVars.clear();
string result = code.str();
result.insert(id.size() + 2, sp.str());
return result;
}
void IntExpr::genCode(Code &code)
{ // done
string temp = getIntTemp();
code.place = temp;
stringstream ss;
ss << "li " << temp << ", " << this->value << endl;
code.code = ss.str();
code.type = INT;
}
void FloatExpr::genCode(Code &code)
{ // done
string floatTemp = getFloatTemp();
code.place = floatTemp;
stringstream ss;
ss << "li.s " << floatTemp << ", " << this->value << endl;
code.code = ss.str();
code.type = FLOAT32;
}
void StringExpr::genCode(Code &code)
{ // done
string strLabel = getNewLabel("string");
stringstream ss;
ss << strLabel << ": .asciiz" << this->value << "" << endl;
assemblyFile.data += ss.str();
code.code = "";
code.place = strLabel;
code.type = STRING;
}
void IdExpr::genCode(Code &code)
{ // done
if (codeGenerationVars.find(this->id) == codeGenerationVars.end())
{
code.type = globalVariables[this->id];
if (globalVariables[this->id] == INT_ARRAY || globalVariables[this->id] == FLOAT32_ARRAY)
{
string intTemp = getIntTemp();
code.code = "la " + intTemp + ", " + this->id + "\n";
code.place = intTemp;
}
if (globalVariables[this->id] == FLOAT32)
{
string floatTemp = getFloatTemp();
code.place = floatTemp;
code.code = "l.s " + floatTemp + ", " + this->id + "\n";
}
else
{
string intTemp = getIntTemp();
code.place = intTemp;
code.code = "lw " + intTemp + ", " + this->id + "\n";
}
}
else
{
code.type = codeGenerationVars[this->id]->type;
if (codeGenerationVars[this->id]->type == FLOAT32 && !codeGenerationVars[this->id]->isArray)
{
string floatTemp = getFloatTemp();
code.place = floatTemp;
code.code = "l.s " + floatTemp + ", " + to_string(codeGenerationVars[this->id]->offset) + "($sp)\n";
}
else if (codeGenerationVars[this->id]->type == INT && !codeGenerationVars[this->id]->isArray ||
codeGenerationVars[this->id]->type == BOOL && !codeGenerationVars[this->id]->isArray)