void SymbolTable::closeScope() // be responsible for release Attributes.
{
for (UnitSymtab::iterator i = currentSymtab().begin(); i != currentSymtab().end(); ++i) {
delete i->second;
}
symtabStack_.pop_back();
}
/**
* emitPostCall
*
* Save callee-saved regs
* extend AR for locals
* find static data area
* initialize locals
* fall through to code
* @return index to label in symbol table for caller methods
*/
void emitPostCall(DList instList, SymtabStack symtabStack, int index, int frameSize){
SymTable symtab = currentSymtab(symtabStack);
SymTable symtab_0 = lastSymtab(symtabStack);
char* name = (char*)SymGetFieldByIndex(symtab_0, index,SYM_NAME_FIELD);
char* inst = nssave(2,name,":");
dlinkAppend(instList,dlinkNodeAlloc(inst));
//save $ra
inst = ssave("\tsw $ra,76($sp)");
dlinkAppend(instList,dlinkNodeAlloc(inst));
char regN[5];
char frameStr[10];
int si = 0;
//save s0-s7 regs
for( ; si<8; si++){
sprintf(regN,"$s%d,%d($sp)",si,(si*4)+4);
inst = nssave(2,"\tsw ",regN);
dlinkAppend(instList,dlinkNodeAlloc(inst));
}
inst = ssave("\tmove $fp,$sp");
dlinkAppend(instList,dlinkNodeAlloc(inst));
//allocate room for any local variables
if (frameSize != 0) {
sprintf(frameStr,"%d",frameSize);
inst = nssave(2,"\taddi $sp,$sp,",frameStr);
dlinkAppend(instList,dlinkNodeAlloc(inst));
//store any local variables on the stack(kind of)
int i = 0;
int max = SymMaxIndex(symtab);
int offset = 0;
for(;i<=max;i++)
{
offset = -(int)SymGetFieldByIndex(symtab,i,SYMTAB_OFFSET_FIELD);
SymPutFieldByIndex(symtab,i,SYMTAB_OFFSET_FIELD,(Generic)offset);
}
}
}
bool SymbolTable::enterSymbol(const string & name, Attributes *attr)
{
return currentSymtab().insert(
UnitSymtab::value_type(name, attr) ).second;
}
bool SymbolTable::declaredLocally(const string & name)
{
return currentSymtab().find(name) != currentSymtab().end();
}