public override void Visit(ParamDeclNode node)
{
Console.WriteLine(this.indentation + "Parameter <Identifier: " + node.identifier.name + ">");
indentation = indentation + " ";
Console.WriteLine(this.indentation + "Type: " + node.type.toString());
indentation = indentation.Substring(0, indentation.Length - 3);
}
public void genFunctions(Module module)
{
assembly.addLine(".section text");
foreach (FuncDefNode func in module.funcs)
{
CGFuncDefNode cgfunc = new CGFuncDefNode(func);
assembly.addLine(".global " + func.name);
uint paramofs = 8;
for (int i = 0; i < func.paramList.Count; i++)
{
ParamDeclNode para = func.paramList[i];
CGParamDeclNode cgpara = new CGParamDeclNode(para);
cgpara.addr = paramofs;
paramofs += 4;
}
//for now, the only type we handle are ints, so each local var is 4 bytes on the stack
cgfunc.stacksize = 0;
for (int i = 0; i < func.locals.Count; i++)
{
VarDeclNode local = func.locals[i];
CGVarDeclNode cglocal = new CGVarDeclNode(local);
cgfunc.stacksize += 4;
cglocal.addr = cgfunc.stacksize;
cglocal.type = CGVarDeclNode.VarType.LOCAL;
}
//func prolog
assembly.addLine(func.name + ":");
assembly.addLine("push ebp");
assembly.addLine("mov ebp, esp");
assembly.addLine("sub esp, " + cgfunc.stacksize);
foreach (StatementNode stmt in func.body)
{
genStatement(stmt);
}
//func epilog
assembly.addLine("mov esp, ebp");
assembly.addLine("pop ebp");
assembly.addLine("ret");
}
}
public void makeParamDeclarNode(DeclSpecNode declarspecs, DeclaratorNode declar)
{
ParamDeclNode pdecl = new ParamDeclNode();
pdecl.pType = declarspecs.baseType;
DeclaratorNode dnode = declar;
while (dnode != null)
{
if (dnode is IdentDeclaratorNode)
{
pdecl.name = ((IdentDeclaratorNode)dnode).ident;
}
dnode = dnode.next;
}
symbolTable.addSymbol(pdecl.name, pdecl);
curParamList.paramList.Add(pdecl);
}
public CGParamDeclNode(ParamDeclNode _paramdecl)
{
paramdecl = _paramdecl;
paramdecl.cgnode = this;
}
public override void Visit(ParamDeclNode node)
{
node.type.Accept(this);
node.identifier.Accept(this);
}
public override void Visit(ParamDeclNode node)
{
ParameterDefinition parameterDefinition = MethodBeingVisited.Parameters.Add(node.identifier.name);
parameterDefinition.ParameterType = node.type.Type;
}
public virtual void Visit(ParamDeclNode node)
{
node.type.Accept(this);
node.identifier.Accept(this);
}
