private LLVMValueRef GenerateFunctionCall(FunctionCall call, LLVMBuilderRef builder)
{
LLVMValueRef func = _table.GetFunc(call.Name);
List<LLVMValueRef> args = new List<LLVMValueRef>();
for (int i = 0; i < call.ArgCount; ++i)
{
Expression argNode = call.Args[i];
LLVMValueRef arg = GenerateExpression(argNode, builder);
args.Add(arg);
}
return LLVM.BuildCall(builder, func, args.ToArray(), "");
}
private Expression MakeNode()
{
Expression node;
double dVal;
int iVal;
switch (_tokens.Current.Type)
{
case TokenType.IntLiteral:
{
string cur = _tokens.Current.Text;
if(cur.StartsWith("0x", StringComparison.Ordinal))
{
iVal = Convert.ToInt32(cur, 16);
}
else
{
iVal = Convert.ToInt32(cur);
}
node = new IntegerLiteral(iVal);
_tokens.Advance();
}
break;
case TokenType.OpenParens:
{
_tokens.Advance();
if (_tokens.Current.Type == TokenType.Identifier
&& _tokens.LookAhead().Type == TokenType.CloseParens)
{
string type = _tokens.Current.Text;
_tokens.AdvanceBy(2);
Expression exp = MakeNode();
node = new Cast(type, exp);
}
else
{
node = ParseStatementHelper(MakeNode(), 0);
if (_tokens.Current.Type != TokenType.CloseParens)
{
throw new Exception("Expected closing parens.");
}
_tokens.Advance();
}
}
break;
case TokenType.StringLiteral:
{
node = new StringLiteral(_tokens.Current.Text);
_tokens.Advance();
}
break;
case TokenType.FloatLiteral:
{
dVal = Convert.ToDouble(_tokens.Current.Text);
node = new FloatLiteral(dVal);
_tokens.Advance();
}
break;
case TokenType.Identifier:
{
if (_tokens.LookAhead().Type == TokenType.Identifier)
{
node = new Declaration(_tokens.Current.Text, _tokens.LookAhead().Text);
_tokens.AdvanceBy(2);
}
else if (_tokens.LookAhead().Type == TokenType.OpenParens)
{
string name = _tokens.Current.Text;
_tokens.Advance();
ImmutableList<Expression> args = ParseFunctionArgs();
node = new FunctionCall(name, args);
}
else
{
node = new Identifier(_tokens.Current.Text);
_tokens.Advance();
}
}
break;
default:
{
throw new Exception("Unknown token type in makeNode");
}
}
return node;
}