forked from M-Labs/nac3
584 lines
27 KiB
Rust
584 lines
27 KiB
Rust
extern crate num_bigint;
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extern crate inkwell;
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extern crate rustpython_parser;
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use std::error::Error;
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use std::fmt;
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use std::path::Path;
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use std::collections::HashMap;
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use num_traits::cast::ToPrimitive;
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use rustpython_parser::ast;
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use inkwell::OptimizationLevel;
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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::targets::*;
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use inkwell::types;
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use inkwell::types::BasicType;
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use inkwell::values;
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use inkwell::{IntPredicate, FloatPredicate};
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use inkwell::basic_block;
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use inkwell::passes;
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#[derive(Debug)]
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enum CompileErrorKind {
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Unsupported(&'static str),
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MissingTypeAnnotation,
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UnknownTypeAnnotation,
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IncompatibleTypes,
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UnboundIdentifier,
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BreakOutsideLoop,
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Internal(&'static str)
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}
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impl fmt::Display for CompileErrorKind {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self {
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CompileErrorKind::Unsupported(feature)
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=> write!(f, "The following Python feature is not supported by NAC3: {}", feature),
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CompileErrorKind::MissingTypeAnnotation
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=> write!(f, "Missing type annotation"),
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CompileErrorKind::UnknownTypeAnnotation
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=> write!(f, "Unknown type annotation"),
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CompileErrorKind::IncompatibleTypes
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=> write!(f, "Incompatible types"),
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CompileErrorKind::UnboundIdentifier
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=> write!(f, "Unbound identifier"),
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CompileErrorKind::BreakOutsideLoop
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=> write!(f, "Break outside loop"),
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CompileErrorKind::Internal(details)
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=> write!(f, "Internal compiler error: {}", details),
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}
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}
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}
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#[derive(Debug)]
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pub struct CompileError {
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location: ast::Location,
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kind: CompileErrorKind,
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}
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impl fmt::Display for CompileError {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "{}, at {}", self.kind, self.location)
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}
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}
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impl Error for CompileError {}
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type CompileResult<T> = Result<T, CompileError>;
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pub struct CodeGen<'ctx> {
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context: &'ctx Context,
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module: Module<'ctx>,
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pass_manager: passes::PassManager<values::FunctionValue<'ctx>>,
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builder: Builder<'ctx>,
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current_source_location: ast::Location,
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namespace: HashMap<String, values::PointerValue<'ctx>>,
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break_bb: Option<basic_block::BasicBlock<'ctx>>,
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}
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impl<'ctx> CodeGen<'ctx> {
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pub fn new(context: &'ctx Context) -> CodeGen<'ctx> {
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let module = context.create_module("kernel");
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let pass_manager = passes::PassManager::create(&module);
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pass_manager.add_instruction_combining_pass();
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pass_manager.add_reassociate_pass();
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pass_manager.add_gvn_pass();
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pass_manager.add_cfg_simplification_pass();
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pass_manager.add_basic_alias_analysis_pass();
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pass_manager.add_promote_memory_to_register_pass();
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pass_manager.add_instruction_combining_pass();
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pass_manager.add_reassociate_pass();
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pass_manager.initialize();
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let i32_type = context.i32_type();
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let fn_type = i32_type.fn_type(&[i32_type.into()], false);
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module.add_function("output", fn_type, None);
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CodeGen {
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context, module, pass_manager,
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builder: context.create_builder(),
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current_source_location: ast::Location::default(),
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namespace: HashMap::new(),
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break_bb: None,
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}
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}
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fn set_source_location(&mut self, location: ast::Location) {
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self.current_source_location = location;
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}
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fn compile_error(&self, kind: CompileErrorKind) -> CompileError {
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CompileError {
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location: self.current_source_location,
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kind
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}
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}
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fn get_basic_type(&self, name: &str) -> CompileResult<types::BasicTypeEnum<'ctx>> {
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match name {
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"bool" => Ok(self.context.bool_type().into()),
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"int32" => Ok(self.context.i32_type().into()),
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"int64" => Ok(self.context.i64_type().into()),
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"float32" => Ok(self.context.f32_type().into()),
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"float64" => Ok(self.context.f64_type().into()),
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_ => Err(self.compile_error(CompileErrorKind::UnknownTypeAnnotation))
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}
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}
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fn compile_function_def(
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&mut self,
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name: &str,
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args: &ast::Parameters,
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body: &ast::Suite,
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decorator_list: &[ast::Expression],
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returns: &Option<ast::Expression>,
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is_async: bool,
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) -> CompileResult<values::FunctionValue<'ctx>> {
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if is_async {
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return Err(self.compile_error(CompileErrorKind::Unsupported("async functions")))
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}
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for decorator in decorator_list.iter() {
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self.set_source_location(decorator.location);
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if let ast::ExpressionType::Identifier { name } = &decorator.node {
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if name != "kernel" && name != "portable" {
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return Err(self.compile_error(CompileErrorKind::Unsupported("custom decorators")))
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}
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} else {
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return Err(self.compile_error(CompileErrorKind::Unsupported("decorator must be an identifier")))
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}
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}
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let args_type = args.args.iter().map(|val| {
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self.set_source_location(val.location);
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if let Some(annotation) = &val.annotation {
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if let ast::ExpressionType::Identifier { name } = &annotation.node {
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Ok(self.get_basic_type(&name)?)
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} else {
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Err(self.compile_error(CompileErrorKind::Unsupported("type annotation must be an identifier")))
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}
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} else {
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Err(self.compile_error(CompileErrorKind::MissingTypeAnnotation))
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}
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}).collect::<CompileResult<Vec<types::BasicTypeEnum>>>()?;
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let return_type = if let Some(returns) = returns {
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self.set_source_location(returns.location);
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if let ast::ExpressionType::Identifier { name } = &returns.node {
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if name == "None" { None } else { Some(self.get_basic_type(name)?) }
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} else {
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return Err(self.compile_error(CompileErrorKind::Unsupported("type annotation must be an identifier")))
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}
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} else {
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None
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};
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let fn_type = match return_type {
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Some(ty) => ty.fn_type(&args_type, false),
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None => self.context.void_type().fn_type(&args_type, false)
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};
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let function = self.module.add_function(name, fn_type, None);
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let basic_block = self.context.append_basic_block(function, "entry");
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self.builder.position_at_end(basic_block);
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for (n, arg) in args.args.iter().enumerate() {
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let param = function.get_nth_param(n as u32).unwrap();
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let alloca = self.builder.build_alloca(param.get_type(), &arg.arg);
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self.builder.build_store(alloca, param);
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self.namespace.insert(arg.arg.clone(), alloca);
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}
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self.compile_suite(body, return_type)?;
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Ok(function)
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}
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fn compile_expression(
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&mut self,
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expression: &ast::Expression
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) -> CompileResult<values::BasicValueEnum<'ctx>> {
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self.set_source_location(expression.location);
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match &expression.node {
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ast::ExpressionType::True => Ok(self.context.bool_type().const_int(1, false).into()),
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ast::ExpressionType::False => Ok(self.context.bool_type().const_int(0, false).into()),
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ast::ExpressionType::Number { value: ast::Number::Integer { value } } => {
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let mut bits = value.bits();
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if value.sign() == num_bigint::Sign::Minus {
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bits += 1;
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}
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match bits {
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0..=32 => Ok(self.context.i32_type().const_int(value.to_i32().unwrap() as _, true).into()),
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33..=64 => Ok(self.context.i64_type().const_int(value.to_i64().unwrap() as _, true).into()),
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_ => Err(self.compile_error(CompileErrorKind::Unsupported("integers larger than 64 bits")))
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}
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},
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ast::ExpressionType::Number { value: ast::Number::Float { value } } => {
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Ok(self.context.f64_type().const_float(*value).into())
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},
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ast::ExpressionType::Identifier { name } => {
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match self.namespace.get(name) {
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Some(value) => Ok(self.builder.build_load(*value, name).into()),
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None => Err(self.compile_error(CompileErrorKind::UnboundIdentifier))
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}
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},
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ast::ExpressionType::Unop { op, a } => {
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let a = self.compile_expression(&a)?;
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match (op, a) {
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(ast::UnaryOperator::Pos, values::BasicValueEnum::IntValue(a))
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=> Ok(a.into()),
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(ast::UnaryOperator::Pos, values::BasicValueEnum::FloatValue(a))
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=> Ok(a.into()),
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(ast::UnaryOperator::Neg, values::BasicValueEnum::IntValue(a))
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=> Ok(self.builder.build_int_neg(a, "tmpneg").into()),
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(ast::UnaryOperator::Neg, values::BasicValueEnum::FloatValue(a))
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=> Ok(self.builder.build_float_neg(a, "tmpneg").into()),
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(ast::UnaryOperator::Inv, values::BasicValueEnum::IntValue(a))
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=> Ok(self.builder.build_not(a, "tmpnot").into()),
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(ast::UnaryOperator::Not, values::BasicValueEnum::IntValue(a)) => {
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// boolean "not"
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if a.get_type().get_bit_width() != 1 {
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Err(self.compile_error(CompileErrorKind::Unsupported("unimplemented unary operation")))
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} else {
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Ok(self.builder.build_not(a, "tmpnot").into())
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}
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},
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_ => Err(self.compile_error(CompileErrorKind::Unsupported("unimplemented unary operation"))),
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}
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},
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ast::ExpressionType::Binop { a, op, b } => {
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let a = self.compile_expression(&a)?;
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let b = self.compile_expression(&b)?;
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if a.get_type() != b.get_type() {
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return Err(self.compile_error(CompileErrorKind::IncompatibleTypes));
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}
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use ast::Operator::*;
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match (op, a, b) {
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(Add, values::BasicValueEnum::IntValue(a), values::BasicValueEnum::IntValue(b))
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=> Ok(self.builder.build_int_add(a, b, "tmpadd").into()),
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(Sub, values::BasicValueEnum::IntValue(a), values::BasicValueEnum::IntValue(b))
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=> Ok(self.builder.build_int_sub(a, b, "tmpsub").into()),
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(Mult, values::BasicValueEnum::IntValue(a), values::BasicValueEnum::IntValue(b))
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=> Ok(self.builder.build_int_mul(a, b, "tmpmul").into()),
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(Add, values::BasicValueEnum::FloatValue(a), values::BasicValueEnum::FloatValue(b))
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=> Ok(self.builder.build_float_add(a, b, "tmpadd").into()),
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(Sub, values::BasicValueEnum::FloatValue(a), values::BasicValueEnum::FloatValue(b))
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=> Ok(self.builder.build_float_sub(a, b, "tmpsub").into()),
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(Mult, values::BasicValueEnum::FloatValue(a), values::BasicValueEnum::FloatValue(b))
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=> Ok(self.builder.build_float_mul(a, b, "tmpmul").into()),
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(Div, values::BasicValueEnum::FloatValue(a), values::BasicValueEnum::FloatValue(b))
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=> Ok(self.builder.build_float_div(a, b, "tmpdiv").into()),
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(FloorDiv, values::BasicValueEnum::IntValue(a), values::BasicValueEnum::IntValue(b))
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=> Ok(self.builder.build_int_signed_div(a, b, "tmpdiv").into()),
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_ => Err(self.compile_error(CompileErrorKind::Unsupported("unimplemented binary operation"))),
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}
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},
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ast::ExpressionType::Compare { vals, ops } => {
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let mut vals = vals.iter();
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let mut ops = ops.iter();
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let mut result = None;
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let mut a = self.compile_expression(vals.next().unwrap())?;
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loop {
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if let Some(op) = ops.next() {
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let b = self.compile_expression(vals.next().unwrap())?;
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if a.get_type() != b.get_type() {
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return Err(self.compile_error(CompileErrorKind::IncompatibleTypes));
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}
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let this_result = match (a, b) {
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(values::BasicValueEnum::IntValue(a), values::BasicValueEnum::IntValue(b)) => {
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match op {
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ast::Comparison::Equal
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=> self.builder.build_int_compare(IntPredicate::EQ, a, b, "tmpeq"),
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ast::Comparison::NotEqual
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=> self.builder.build_int_compare(IntPredicate::NE, a, b, "tmpne"),
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ast::Comparison::Less
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=> self.builder.build_int_compare(IntPredicate::SLT, a, b, "tmpslt"),
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ast::Comparison::LessOrEqual
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=> self.builder.build_int_compare(IntPredicate::SLE, a, b, "tmpsle"),
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ast::Comparison::Greater
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=> self.builder.build_int_compare(IntPredicate::SGT, a, b, "tmpsgt"),
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ast::Comparison::GreaterOrEqual
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=> self.builder.build_int_compare(IntPredicate::SGE, a, b, "tmpsge"),
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_ => return Err(self.compile_error(CompileErrorKind::Unsupported("special comparison"))),
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}
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},
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(values::BasicValueEnum::FloatValue(a), values::BasicValueEnum::FloatValue(b)) => {
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match op {
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ast::Comparison::Equal
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=> self.builder.build_float_compare(FloatPredicate::OEQ, a, b, "tmpoeq"),
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ast::Comparison::NotEqual
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=> self.builder.build_float_compare(FloatPredicate::UNE, a, b, "tmpune"),
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ast::Comparison::Less
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=> self.builder.build_float_compare(FloatPredicate::OLT, a, b, "tmpolt"),
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ast::Comparison::LessOrEqual
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=> self.builder.build_float_compare(FloatPredicate::OLE, a, b, "tmpole"),
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ast::Comparison::Greater
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=> self.builder.build_float_compare(FloatPredicate::OGT, a, b, "tmpogt"),
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ast::Comparison::GreaterOrEqual
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=> self.builder.build_float_compare(FloatPredicate::OGE, a, b, "tmpoge"),
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_ => return Err(self.compile_error(CompileErrorKind::Unsupported("special comparison"))),
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}
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},
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_ => return Err(self.compile_error(CompileErrorKind::Unsupported("comparison of non-numerical types"))),
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};
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match result {
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Some(last) => {
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result = Some(self.builder.build_and(last, this_result, "tmpand"));
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}
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None => {
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result = Some(this_result);
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}
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}
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a = b;
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} else {
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return Ok(result.unwrap().into())
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}
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}
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},
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ast::ExpressionType::Call { function, args, keywords } => {
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if !keywords.is_empty() {
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return Err(self.compile_error(CompileErrorKind::Unsupported("keyword arguments")))
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}
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let args = args.iter().map(|val| self.compile_expression(val))
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.collect::<CompileResult<Vec<values::BasicValueEnum>>>()?;
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self.set_source_location(expression.location);
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if let ast::ExpressionType::Identifier { name } = &function.node {
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match (name.as_str(), args[0]) {
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("int32", values::BasicValueEnum::IntValue(a)) => {
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let nbits = a.get_type().get_bit_width();
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if nbits < 32 {
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Ok(self.builder.build_int_s_extend(a, self.context.i32_type(), "tmpsext").into())
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} else if nbits > 32 {
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Ok(self.builder.build_int_truncate(a, self.context.i32_type(), "tmptrunc").into())
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} else {
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Ok(a.into())
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}
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},
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("int64", values::BasicValueEnum::IntValue(a)) => {
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let nbits = a.get_type().get_bit_width();
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if nbits < 64 {
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Ok(self.builder.build_int_s_extend(a, self.context.i64_type(), "tmpsext").into())
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} else {
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Ok(a.into())
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}
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},
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("int32", values::BasicValueEnum::FloatValue(a)) => {
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Ok(self.builder.build_float_to_signed_int(a, self.context.i32_type(), "tmpfptosi").into())
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},
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("int64", values::BasicValueEnum::FloatValue(a)) => {
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Ok(self.builder.build_float_to_signed_int(a, self.context.i64_type(), "tmpfptosi").into())
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},
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("float32", values::BasicValueEnum::IntValue(a)) => {
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Ok(self.builder.build_signed_int_to_float(a, self.context.f32_type(), "tmpsitofp").into())
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},
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("float64", values::BasicValueEnum::IntValue(a)) => {
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Ok(self.builder.build_signed_int_to_float(a, self.context.f64_type(), "tmpsitofp").into())
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},
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("float32", values::BasicValueEnum::FloatValue(a)) => {
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if a.get_type() == self.context.f64_type() {
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Ok(self.builder.build_float_trunc(a, self.context.f32_type(), "tmptrunc").into())
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} else {
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Ok(a.into())
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}
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},
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("float64", values::BasicValueEnum::FloatValue(a)) => {
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if a.get_type() == self.context.f32_type() {
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Ok(self.builder.build_float_ext(a, self.context.f64_type(), "tmpext").into())
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} else {
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Ok(a.into())
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}
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},
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("output", values::BasicValueEnum::IntValue(a)) => {
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let fn_value = self.module.get_function("output").unwrap();
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Ok(self.builder.build_call(fn_value, &[a.into()], "call")
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.try_as_basic_value().left().unwrap())
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},
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_ => Err(self.compile_error(CompileErrorKind::Unsupported("unrecognized call")))
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}
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} else {
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return Err(self.compile_error(CompileErrorKind::Unsupported("function must be an identifier")))
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}
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},
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_ => return Err(self.compile_error(CompileErrorKind::Unsupported("unimplemented expression"))),
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}
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}
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fn compile_statement(
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&mut self,
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statement: &ast::Statement,
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return_type: Option<types::BasicTypeEnum>
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) -> CompileResult<()> {
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self.set_source_location(statement.location);
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use ast::StatementType::*;
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match &statement.node {
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Assign { targets, value } => {
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let value = self.compile_expression(value)?;
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for target in targets.iter() {
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self.set_source_location(target.location);
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if let ast::ExpressionType::Identifier { name } = &target.node {
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let builder = &self.builder;
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let target = self.namespace.entry(name.clone()).or_insert_with(
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|| builder.build_alloca(value.get_type(), name));
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if target.get_type() != value.get_type().ptr_type(inkwell::AddressSpace::Generic) {
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return Err(self.compile_error(CompileErrorKind::IncompatibleTypes));
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}
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builder.build_store(*target, value);
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} else {
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return Err(self.compile_error(CompileErrorKind::Unsupported("assignment target must be an identifier")))
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}
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}
|
|
},
|
|
Expression { expression } => { self.compile_expression(expression)?; },
|
|
If { test, body, orelse } => {
|
|
let test = self.compile_expression(test)?;
|
|
if test.get_type() != self.context.bool_type().into() {
|
|
return Err(self.compile_error(CompileErrorKind::IncompatibleTypes));
|
|
}
|
|
|
|
let parent = self.builder.get_insert_block().unwrap().get_parent().unwrap();
|
|
let then_bb = self.context.append_basic_block(parent, "then");
|
|
let else_bb = self.context.append_basic_block(parent, "else");
|
|
let cont_bb = self.context.append_basic_block(parent, "ifcont");
|
|
self.builder.build_conditional_branch(test.into_int_value(), then_bb, else_bb);
|
|
|
|
self.builder.position_at_end(then_bb);
|
|
self.compile_suite(body, return_type)?;
|
|
self.builder.build_unconditional_branch(cont_bb);
|
|
|
|
self.builder.position_at_end(else_bb);
|
|
if let Some(orelse) = orelse {
|
|
self.compile_suite(orelse, return_type)?;
|
|
}
|
|
self.builder.build_unconditional_branch(cont_bb);
|
|
self.builder.position_at_end(cont_bb);
|
|
},
|
|
While { test, body, orelse } => {
|
|
let parent = self.builder.get_insert_block().unwrap().get_parent().unwrap();
|
|
let test_bb = self.context.append_basic_block(parent, "test");
|
|
self.builder.build_unconditional_branch(test_bb);
|
|
self.builder.position_at_end(test_bb);
|
|
let test = self.compile_expression(test)?;
|
|
if test.get_type() != self.context.bool_type().into() {
|
|
return Err(self.compile_error(CompileErrorKind::IncompatibleTypes));
|
|
}
|
|
|
|
let then_bb = self.context.append_basic_block(parent, "then");
|
|
let else_bb = self.context.append_basic_block(parent, "else");
|
|
let cont_bb = self.context.append_basic_block(parent, "ifcont");
|
|
self.builder.build_conditional_branch(test.into_int_value(), then_bb, else_bb);
|
|
|
|
self.break_bb = Some(cont_bb);
|
|
|
|
self.builder.position_at_end(then_bb);
|
|
self.compile_suite(body, return_type)?;
|
|
self.builder.build_unconditional_branch(test_bb);
|
|
|
|
self.builder.position_at_end(else_bb);
|
|
if let Some(orelse) = orelse {
|
|
self.compile_suite(orelse, return_type)?;
|
|
}
|
|
self.builder.build_unconditional_branch(cont_bb);
|
|
self.builder.position_at_end(cont_bb);
|
|
|
|
self.break_bb = None;
|
|
},
|
|
Break => {
|
|
if let Some(bb) = self.break_bb {
|
|
self.builder.build_unconditional_branch(bb);
|
|
let parent = self.builder.get_insert_block().unwrap().get_parent().unwrap();
|
|
let unreachable_bb = self.context.append_basic_block(parent, "unreachable");
|
|
self.builder.position_at_end(unreachable_bb);
|
|
} else {
|
|
return Err(self.compile_error(CompileErrorKind::BreakOutsideLoop));
|
|
}
|
|
}
|
|
Return { value: Some(value) } => {
|
|
if let Some(return_type) = return_type {
|
|
let value = self.compile_expression(value)?;
|
|
if value.get_type() != return_type {
|
|
return Err(self.compile_error(CompileErrorKind::IncompatibleTypes));
|
|
}
|
|
self.builder.build_return(Some(&value));
|
|
} else {
|
|
return Err(self.compile_error(CompileErrorKind::IncompatibleTypes));
|
|
}
|
|
},
|
|
Return { value: None } => {
|
|
if !return_type.is_none() {
|
|
return Err(self.compile_error(CompileErrorKind::IncompatibleTypes));
|
|
}
|
|
self.builder.build_return(None);
|
|
},
|
|
Pass => (),
|
|
_ => return Err(self.compile_error(CompileErrorKind::Unsupported("special statement"))),
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn compile_suite(
|
|
&mut self,
|
|
suite: &ast::Suite,
|
|
return_type: Option<types::BasicTypeEnum>
|
|
) -> CompileResult<()> {
|
|
for statement in suite.iter() {
|
|
self.compile_statement(statement, return_type)?;
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
pub fn compile_toplevel(&mut self, statement: &ast::Statement) -> CompileResult<()> {
|
|
self.set_source_location(statement.location);
|
|
if let ast::StatementType::FunctionDef {
|
|
is_async,
|
|
name,
|
|
args,
|
|
body,
|
|
decorator_list,
|
|
returns,
|
|
} = &statement.node {
|
|
let function = self.compile_function_def(name, args, body, decorator_list, returns, *is_async)?;
|
|
self.pass_manager.run_on(&function);
|
|
Ok(())
|
|
} else {
|
|
Err(self.compile_error(CompileErrorKind::Internal("top-level is not a function definition")))
|
|
}
|
|
}
|
|
|
|
pub fn print_ir(&self) {
|
|
self.module.print_to_stderr();
|
|
}
|
|
|
|
pub fn output(&self) {
|
|
//let triple = TargetTriple::create("riscv32-none-linux-gnu");
|
|
let triple = TargetMachine::get_default_triple();
|
|
let target = Target::from_triple(&triple)
|
|
.expect("couldn't create target from target triple");
|
|
|
|
let target_machine = target
|
|
.create_target_machine(
|
|
&triple,
|
|
"",
|
|
"",
|
|
OptimizationLevel::Default,
|
|
RelocMode::Default,
|
|
CodeModel::Default,
|
|
)
|
|
.expect("couldn't create target machine");
|
|
|
|
target_machine
|
|
.write_to_file(&self.module, FileType::Object, Path::new("test.o"))
|
|
.expect("couldn't write module to file");
|
|
}
|
|
}
|