@Override
public int genLLCode(BasicBlock block) {
Function func = block.getFunc();
HashMap funcSymbolTable = func.getTable();
HashMap globalSymbolTable = func.getGlobalHash();
if (funcSymbolTable.containsKey(id)) {
return (int) funcSymbolTable.get(id);
} else if (globalSymbolTable.containsKey(id)) {
return (int) globalSymbolTable.get(id);
} else {
throw new lowlevel.LowLevelException("Var " + id + " is not defined");
}
}
/**
* This method makes low level code for return statements
*
* @param func
*/
public void genLLCode(Function func) {
BasicBlock currBlock = func.getCurrBlock();
BasicBlock returnBlock = func.getReturnBlock();
if (expression != null) {
expression.genLLCode(func);
Operation setReturn = new Operation(Operation.OperationType.ASSIGN, currBlock);
Operand retSrc = new Operand(Operand.OperandType.REGISTER, expression.getRegisterNum());
Operand retDest = new Operand(Operand.OperandType.MACRO, "RetReg");
setReturn.setSrcOperand(0, retSrc);
setReturn.setDestOperand(0, retDest);
currBlock.appendOper(setReturn);
}
Operation newOper = new Operation(OperationType.JMP, currBlock);
Operand src = new Operand(Operand.OperandType.BLOCK, returnBlock.getBlockNum());
newOper.setSrcOperand(0, src);
currBlock.appendOper(newOper);
}