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85 lines
3.0 KiB
85 lines
3.0 KiB
/** |
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* Copyright 2020 Garrit Franke |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* https://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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use crate::generator::Generator; |
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use crate::parser::node_type::*; |
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use inkwell::context::Context; |
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use inkwell::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::Module<'ctx>, |
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} |
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impl<'ctx> Generator for LLVMGenerator<'ctx> { |
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fn generate(prog: Module) -> 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 { ctx: &ctx, module }; |
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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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Some(Type::Struct(_)) => 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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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, _) => { |
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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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todo!() |
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} |
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}
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