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use crate::generator::Generator;
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use crate::parser::node_type::*;
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use inkwell::builder::Builder;
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use inkwell::context::Context;
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use inkwell::module::Module;
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use inkwell::types::*;
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pub struct LLVMGenerator<'ctx> {
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ctx: &'ctx Context,
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module: Module<'ctx>,
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}
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impl<'ctx> Generator for LLVMGenerator<'ctx> {
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fn generate(prog: Program) -> String {
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let ctx = Context::create();
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let module = ctx.create_module("main");
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let mut generator = LLVMGenerator {
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ctx: &ctx,
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module: module,
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};
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for func in prog.func {
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generator.generate_function(func);
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}
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generator.module.print_to_string().to_string()
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}
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}
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impl<'ctx> LLVMGenerator<'ctx> {
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fn convert_to_llvm_args(&mut self, args: Vec<Variable>) -> Vec<BasicTypeEnum<'ctx>> {
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let arg_types: Vec<BasicTypeEnum> = args
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.iter()
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.map(|arg| match arg.ty {
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Some(Type::Int) => self.ctx.i32_type().as_basic_type_enum(),
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Some(Type::Bool) => self.ctx.bool_type().as_basic_type_enum(),
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Some(Type::Any) => todo!(),
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Some(Type::Str) => todo!(),
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Some(Type::Array(_)) => todo!(),
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None => panic!("Function argument has no type"),
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})
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.collect();
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return arg_types;
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}
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fn generate_function(&mut self, func: Function) {
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let arg_types: Vec<BasicTypeEnum> = self.convert_to_llvm_args(func.arguments);
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let func_type = match func.ret_type {
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Some(Type::Int) => self.ctx.i32_type().fn_type(&arg_types, false),
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Some(Type::Bool) => self.ctx.bool_type().fn_type(&arg_types, false),
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None => self.ctx.void_type().fn_type(&arg_types, false),
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_ => todo!(),
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};
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let function = self.module.add_function(&func.name, func_type, None);
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let _basic_block = self.ctx.append_basic_block(function, "entry");
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self.generate_statement(func.body);
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}
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fn generate_statement(&mut self, statement: Statement) {
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match statement {
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Statement::Block(statements, scope) => {
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for s in statements {
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self.generate_statement(s);
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}
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}
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Statement::Exp(expression) => self.generate_expression(expression),
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_ => todo!(),
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};
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}
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fn generate_expression(&mut self, expr: Expression) {
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match expr {
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_ => todo!(),
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}
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}
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}
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