forked from M-Labs/nac3
609 lines
22 KiB
Rust
609 lines
22 KiB
Rust
use crate::{
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symbol_resolver::{StaticValue, SymbolResolver},
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toplevel::{TopLevelContext, TopLevelDef},
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typecheck::{
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type_inferencer::{CodeLocation, PrimitiveStore},
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typedef::{CallId, FuncArg, Type, TypeEnum, Unifier},
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},
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};
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use crossbeam::channel::{unbounded, Receiver, Sender};
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use inkwell::{
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AddressSpace,
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OptimizationLevel,
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attributes::{Attribute, AttributeLoc},
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basic_block::BasicBlock,
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builder::Builder,
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context::Context,
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module::Module,
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passes::{PassManager, PassManagerBuilder},
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types::{AnyType, BasicType, BasicTypeEnum},
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values::{BasicValueEnum, FunctionValue, PhiValue, PointerValue}
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};
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use itertools::Itertools;
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use nac3parser::ast::{Stmt, StrRef, Location};
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use parking_lot::{Condvar, Mutex};
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use std::collections::{HashMap, HashSet};
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use std::sync::{
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atomic::{AtomicBool, Ordering},
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Arc,
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};
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use std::thread;
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pub mod concrete_type;
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pub mod expr;
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mod generator;
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pub mod irrt;
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pub mod stmt;
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#[cfg(test)]
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mod test;
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use concrete_type::{ConcreteType, ConcreteTypeEnum, ConcreteTypeStore};
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pub use generator::{CodeGenerator, DefaultCodeGenerator};
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#[derive(Default)]
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pub struct StaticValueStore {
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pub lookup: HashMap<Vec<(usize, u64)>, usize>,
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pub store: Vec<HashMap<usize, Arc<dyn StaticValue + Send + Sync>>>,
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}
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pub type VarValue<'ctx> = (PointerValue<'ctx>, Option<Arc<dyn StaticValue + Send + Sync>>, i64);
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pub struct CodeGenContext<'ctx, 'a> {
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pub ctx: &'ctx Context,
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pub builder: Builder<'ctx>,
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pub module: Module<'ctx>,
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pub top_level: &'a TopLevelContext,
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pub unifier: Unifier,
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pub resolver: Arc<dyn SymbolResolver + Send + Sync>,
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pub static_value_store: Arc<Mutex<StaticValueStore>>,
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pub var_assignment: HashMap<StrRef, VarValue<'ctx>>,
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pub type_cache: HashMap<Type, BasicTypeEnum<'ctx>>,
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pub primitives: PrimitiveStore,
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pub calls: Arc<HashMap<CodeLocation, CallId>>,
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pub registry: &'a WorkerRegistry,
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// const string cache
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pub const_strings: HashMap<String, BasicValueEnum<'ctx>>,
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// stores the alloca for variables
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pub init_bb: BasicBlock<'ctx>,
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// the first one is the test_bb, and the second one is bb after the loop
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pub loop_target: Option<(BasicBlock<'ctx>, BasicBlock<'ctx>)>,
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// unwind target bb
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pub unwind_target: Option<BasicBlock<'ctx>>,
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// return target bb, just emit ret if no such target
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pub return_target: Option<BasicBlock<'ctx>>,
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pub return_buffer: Option<PointerValue<'ctx>>,
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// outer catch clauses
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pub outer_catch_clauses:
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Option<(Vec<Option<BasicValueEnum<'ctx>>>, BasicBlock<'ctx>, PhiValue<'ctx>)>,
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pub need_sret: bool,
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pub current_loc: Location,
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}
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impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
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pub fn is_terminated(&self) -> bool {
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self.builder.get_insert_block().unwrap().get_terminator().is_some()
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}
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}
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type Fp = Box<dyn Fn(&Module) + Send + Sync>;
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pub struct WithCall {
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fp: Fp,
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}
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impl WithCall {
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pub fn new(fp: Fp) -> WithCall {
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WithCall { fp }
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}
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pub fn run<'ctx>(&self, m: &Module<'ctx>) {
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(self.fp)(m)
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}
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}
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pub struct WorkerRegistry {
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sender: Arc<Sender<Option<CodeGenTask>>>,
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receiver: Arc<Receiver<Option<CodeGenTask>>>,
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panicked: AtomicBool,
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task_count: Mutex<usize>,
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thread_count: usize,
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wait_condvar: Condvar,
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top_level_ctx: Arc<TopLevelContext>,
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static_value_store: Arc<Mutex<StaticValueStore>>,
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}
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impl WorkerRegistry {
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pub fn create_workers<G: CodeGenerator + Send + 'static>(
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generators: Vec<Box<G>>,
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top_level_ctx: Arc<TopLevelContext>,
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f: Arc<WithCall>,
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) -> (Arc<WorkerRegistry>, Vec<thread::JoinHandle<()>>) {
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let (sender, receiver) = unbounded();
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let task_count = Mutex::new(0);
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let wait_condvar = Condvar::new();
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// init: 0 to be empty
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let mut static_value_store: StaticValueStore = Default::default();
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static_value_store.lookup.insert(Default::default(), 0);
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static_value_store.store.push(Default::default());
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let registry = Arc::new(WorkerRegistry {
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sender: Arc::new(sender),
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receiver: Arc::new(receiver),
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thread_count: generators.len(),
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panicked: AtomicBool::new(false),
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static_value_store: Arc::new(Mutex::new(static_value_store)),
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task_count,
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wait_condvar,
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top_level_ctx,
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});
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let mut handles = Vec::new();
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for mut generator in generators.into_iter() {
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let registry = registry.clone();
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let registry2 = registry.clone();
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let f = f.clone();
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let handle = thread::spawn(move || {
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registry.worker_thread(generator.as_mut(), f);
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});
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let handle = thread::spawn(move || {
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if let Err(e) = handle.join() {
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if let Some(e) = e.downcast_ref::<&'static str>() {
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eprintln!("Got an error: {}", e);
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} else {
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eprintln!("Got an unknown error: {:?}", e);
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}
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registry2.panicked.store(true, Ordering::SeqCst);
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registry2.wait_condvar.notify_all();
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}
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});
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handles.push(handle);
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}
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(registry, handles)
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}
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pub fn wait_tasks_complete(&self, handles: Vec<thread::JoinHandle<()>>) {
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{
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let mut count = self.task_count.lock();
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while *count != 0 {
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if self.panicked.load(Ordering::SeqCst) {
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break;
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}
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self.wait_condvar.wait(&mut count);
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}
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}
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for _ in 0..self.thread_count {
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self.sender.send(None).unwrap();
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}
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{
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let mut count = self.task_count.lock();
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while *count != self.thread_count {
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if self.panicked.load(Ordering::SeqCst) {
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break;
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}
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self.wait_condvar.wait(&mut count);
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}
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}
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for handle in handles {
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handle.join().unwrap();
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}
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if self.panicked.load(Ordering::SeqCst) {
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panic!("tasks panicked");
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}
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}
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pub fn add_task(&self, task: CodeGenTask) {
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*self.task_count.lock() += 1;
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self.sender.send(Some(task)).unwrap();
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}
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fn worker_thread<G: CodeGenerator>(&self, generator: &mut G, f: Arc<WithCall>) {
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let context = Context::create();
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let mut builder = context.create_builder();
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let module = context.create_module(generator.get_name());
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let pass_builder = PassManagerBuilder::create();
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pass_builder.set_optimization_level(OptimizationLevel::Default);
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let passes = PassManager::create(&module);
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pass_builder.populate_function_pass_manager(&passes);
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let mut errors = HashSet::new();
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while let Some(task) = self.receiver.recv().unwrap() {
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let tmp_module = context.create_module("tmp");
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match gen_func(&context, generator, self, builder, tmp_module, task) {
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Ok(result) => {
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builder = result.0;
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passes.run_on(&result.2);
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module.link_in_module(result.1).unwrap();
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}
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Err((old_builder, e)) => {
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builder = old_builder;
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errors.insert(e);
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}
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}
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*self.task_count.lock() -= 1;
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self.wait_condvar.notify_all();
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}
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if !errors.is_empty() {
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panic!("Codegen error: {}", errors.into_iter().sorted().join("\n----------\n"));
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}
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let result = module.verify();
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if let Err(err) = result {
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println!("{}", module.print_to_string().to_str().unwrap());
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println!("{}", err);
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panic!()
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}
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f.run(&module);
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let mut lock = self.task_count.lock();
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*lock += 1;
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self.wait_condvar.notify_all();
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}
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}
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pub struct CodeGenTask {
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pub subst: Vec<(Type, ConcreteType)>,
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pub store: ConcreteTypeStore,
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pub symbol_name: String,
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pub signature: ConcreteType,
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pub body: Arc<Vec<Stmt<Option<Type>>>>,
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pub calls: Arc<HashMap<CodeLocation, CallId>>,
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pub unifier_index: usize,
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pub resolver: Arc<dyn SymbolResolver + Send + Sync>,
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pub id: usize,
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}
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fn get_llvm_type<'ctx>(
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ctx: &'ctx Context,
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generator: &mut dyn CodeGenerator,
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unifier: &mut Unifier,
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top_level: &TopLevelContext,
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type_cache: &mut HashMap<Type, BasicTypeEnum<'ctx>>,
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primitives: &PrimitiveStore,
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ty: Type,
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) -> BasicTypeEnum<'ctx> {
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use TypeEnum::*;
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// we assume the type cache should already contain primitive types,
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// and they should be passed by value instead of passing as pointer.
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type_cache.get(&unifier.get_representative(ty)).cloned().unwrap_or_else(|| {
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let ty_enum = unifier.get_ty(ty);
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let result = match &*ty_enum {
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TObj { obj_id, fields, .. } => {
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// check to avoid treating primitives other than Option as classes
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if obj_id.0 <= 10 {
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match (unifier.get_ty(ty).as_ref(), unifier.get_ty(primitives.option).as_ref())
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{
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(
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TypeEnum::TObj { obj_id, params, .. },
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TypeEnum::TObj { obj_id: opt_id, .. },
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) if *obj_id == *opt_id => {
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return get_llvm_type(
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ctx,
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generator,
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unifier,
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top_level,
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type_cache,
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primitives,
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*params.iter().next().unwrap().1,
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)
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.ptr_type(AddressSpace::Generic)
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.into();
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}
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_ => unreachable!("must be option type"),
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}
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}
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// a struct with fields in the order of declaration
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let top_level_defs = top_level.definitions.read();
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let definition = top_level_defs.get(obj_id.0).unwrap();
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let ty = if let TopLevelDef::Class { name, fields: fields_list, .. } =
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&*definition.read()
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{
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let struct_type = ctx.opaque_struct_type(&name.to_string());
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type_cache.insert(unifier.get_representative(ty), struct_type.ptr_type(AddressSpace::Generic).into());
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let fields = fields_list
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.iter()
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.map(|f| {
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get_llvm_type(
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ctx,
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generator,
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unifier,
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top_level,
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type_cache,
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primitives,
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fields[&f.0].0,
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)
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})
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.collect_vec();
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struct_type.set_body(&fields, false);
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struct_type.ptr_type(AddressSpace::Generic).into()
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} else {
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unreachable!()
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};
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return ty;
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}
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TTuple { ty } => {
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// a struct with fields in the order present in the tuple
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let fields = ty
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.iter()
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.map(|ty| get_llvm_type(ctx, generator, unifier, top_level, type_cache, primitives, *ty))
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.collect_vec();
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ctx.struct_type(&fields, false).into()
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}
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TList { ty } => {
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// a struct with an integer and a pointer to an array
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let element_type =
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get_llvm_type(ctx, generator, unifier, top_level, type_cache, primitives, *ty);
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let fields = [
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element_type.ptr_type(AddressSpace::Generic).into(),
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generator.get_size_type(ctx).into(),
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];
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ctx.struct_type(&fields, false).ptr_type(AddressSpace::Generic).into()
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}
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TVirtual { .. } => unimplemented!(),
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_ => unreachable!("{}", ty_enum.get_type_name()),
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};
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type_cache.insert(unifier.get_representative(ty), result);
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result
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})
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}
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fn need_sret<'ctx>(ctx: &'ctx Context, ty: BasicTypeEnum<'ctx>) -> bool {
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fn need_sret_impl<'ctx>(ctx: &'ctx Context, ty: BasicTypeEnum<'ctx>, maybe_large: bool) -> bool {
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match ty {
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BasicTypeEnum::IntType(_) | BasicTypeEnum::PointerType(_) => false,
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BasicTypeEnum::FloatType(_) if maybe_large => false,
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BasicTypeEnum::StructType(ty) if maybe_large && ty.count_fields() <= 2 =>
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ty.get_field_types().iter().any(|ty| need_sret_impl(ctx, *ty, false)),
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_ => true,
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}
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}
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need_sret_impl(ctx, ty, true)
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}
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pub fn gen_func_impl<'ctx, G: CodeGenerator, F: FnOnce(&mut G, &mut CodeGenContext) -> Result<(), String>> (
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context: &'ctx Context,
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generator: &mut G,
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registry: &WorkerRegistry,
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builder: Builder<'ctx>,
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module: Module<'ctx>,
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task: CodeGenTask,
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codegen_function: F
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) -> Result<(Builder<'ctx>, Module<'ctx>, FunctionValue<'ctx>), (Builder<'ctx>, String)> {
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let top_level_ctx = registry.top_level_ctx.clone();
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let static_value_store = registry.static_value_store.clone();
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let (mut unifier, primitives) = {
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let (unifier, primitives) = &top_level_ctx.unifiers.read()[task.unifier_index];
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(Unifier::from_shared_unifier(unifier), *primitives)
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};
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unifier.top_level = Some(top_level_ctx.clone());
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let mut cache = HashMap::new();
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for (a, b) in task.subst.iter() {
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// this should be unification between variables and concrete types
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// and should not cause any problem...
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let b = task.store.to_unifier_type(&mut unifier, &primitives, *b, &mut cache);
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unifier
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.unify(*a, b)
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.or_else(|err| {
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if matches!(&*unifier.get_ty(*a), TypeEnum::TRigidVar { .. }) {
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unifier.replace_rigid_var(*a, b);
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Ok(())
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} else {
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Err(err)
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}
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})
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.unwrap()
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}
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// rebuild primitive store with unique representatives
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let primitives = PrimitiveStore {
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int32: unifier.get_representative(primitives.int32),
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int64: unifier.get_representative(primitives.int64),
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uint32: unifier.get_representative(primitives.uint32),
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uint64: unifier.get_representative(primitives.uint64),
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float: unifier.get_representative(primitives.float),
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bool: unifier.get_representative(primitives.bool),
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none: unifier.get_representative(primitives.none),
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range: unifier.get_representative(primitives.range),
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str: unifier.get_representative(primitives.str),
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exception: unifier.get_representative(primitives.exception),
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option: unifier.get_representative(primitives.option),
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};
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let mut type_cache: HashMap<_, _> = [
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(primitives.int32, context.i32_type().into()),
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(primitives.int64, context.i64_type().into()),
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(primitives.uint32, context.i32_type().into()),
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(primitives.uint64, context.i64_type().into()),
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(primitives.float, context.f64_type().into()),
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(primitives.bool, context.bool_type().into()),
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(primitives.str, {
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let str_type = context.opaque_struct_type("str");
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let fields = [
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context.i8_type().ptr_type(AddressSpace::Generic).into(),
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generator.get_size_type(context).into(),
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];
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str_type.set_body(&fields, false);
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str_type.into()
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}),
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(primitives.range, context.i32_type().array_type(3).ptr_type(AddressSpace::Generic).into()),
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]
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.iter()
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.cloned()
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.collect();
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type_cache.insert(primitives.exception, {
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let exception = context.opaque_struct_type("Exception");
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let int32 = context.i32_type().into();
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let int64 = context.i64_type().into();
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let str_ty = *type_cache.get(&primitives.str).unwrap();
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let fields = [int32, str_ty, int32, int32, str_ty, str_ty, int64, int64, int64];
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exception.set_body(&fields, false);
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exception.ptr_type(AddressSpace::Generic).into()
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});
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// NOTE: special handling of option cannot use this type cache since it contains type var,
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// handled inside get_llvm_type instead
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let (args, ret) = if let ConcreteTypeEnum::TFunc { args, ret, .. } =
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task.store.get(task.signature)
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{
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(
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args.iter()
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.map(|arg| FuncArg {
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name: arg.name,
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ty: task.store.to_unifier_type(&mut unifier, &primitives, arg.ty, &mut cache),
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default_value: arg.default_value.clone(),
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})
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.collect_vec(),
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task.store.to_unifier_type(&mut unifier, &primitives, *ret, &mut cache),
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)
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} else {
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unreachable!()
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};
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let ret_type = if unifier.unioned(ret, primitives.none) {
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None
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} else {
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Some(get_llvm_type(context, generator, &mut unifier, top_level_ctx.as_ref(), &mut type_cache, &primitives, ret))
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};
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let has_sret = ret_type.map_or(false, |ty| need_sret(context, ty));
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let mut params = args
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.iter()
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.map(|arg| {
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get_llvm_type(
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context,
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generator,
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&mut unifier,
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top_level_ctx.as_ref(),
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&mut type_cache,
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&primitives,
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arg.ty,
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)
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.into()
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})
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.collect_vec();
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|
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if has_sret {
|
|
params.insert(0, ret_type.unwrap().ptr_type(AddressSpace::Generic).into());
|
|
}
|
|
|
|
let fn_type = match ret_type {
|
|
Some(ret_type) if !has_sret => ret_type.fn_type(¶ms, false),
|
|
_ => context.void_type().fn_type(¶ms, false)
|
|
};
|
|
|
|
let symbol = &task.symbol_name;
|
|
let fn_val =
|
|
module.get_function(symbol).unwrap_or_else(|| module.add_function(symbol, fn_type, None));
|
|
|
|
if let Some(personality) = &top_level_ctx.personality_symbol {
|
|
let personality = module.get_function(personality).unwrap_or_else(|| {
|
|
let ty = context.i32_type().fn_type(&[], true);
|
|
module.add_function(personality, ty, None)
|
|
});
|
|
fn_val.set_personality_function(personality);
|
|
}
|
|
if has_sret {
|
|
fn_val.add_attribute(AttributeLoc::Param(0),
|
|
context.create_type_attribute(Attribute::get_named_enum_kind_id("sret"),
|
|
ret_type.unwrap().as_any_type_enum()));
|
|
}
|
|
|
|
let init_bb = context.append_basic_block(fn_val, "init");
|
|
builder.position_at_end(init_bb);
|
|
let body_bb = context.append_basic_block(fn_val, "body");
|
|
|
|
let mut var_assignment = HashMap::new();
|
|
let offset = if has_sret { 1 } else { 0 };
|
|
for (n, arg) in args.iter().enumerate() {
|
|
let param = fn_val.get_nth_param((n as u32) + offset).unwrap();
|
|
let alloca = builder.build_alloca(
|
|
get_llvm_type(
|
|
context,
|
|
generator,
|
|
&mut unifier,
|
|
top_level_ctx.as_ref(),
|
|
&mut type_cache,
|
|
&primitives,
|
|
arg.ty,
|
|
),
|
|
&arg.name.to_string(),
|
|
);
|
|
builder.build_store(alloca, param);
|
|
var_assignment.insert(arg.name, (alloca, None, 0));
|
|
}
|
|
|
|
let return_buffer = if has_sret {
|
|
Some(fn_val.get_nth_param(0).unwrap().into_pointer_value())
|
|
} else {
|
|
fn_type.get_return_type().map(|v| builder.build_alloca(v, "$ret"))
|
|
};
|
|
|
|
let static_values = {
|
|
let store = registry.static_value_store.lock();
|
|
store.store[task.id].clone()
|
|
};
|
|
for (k, v) in static_values.into_iter() {
|
|
let (_, static_val, _) = var_assignment.get_mut(&args[k].name).unwrap();
|
|
*static_val = Some(v);
|
|
}
|
|
|
|
builder.build_unconditional_branch(body_bb);
|
|
builder.position_at_end(body_bb);
|
|
|
|
let mut code_gen_context = CodeGenContext {
|
|
ctx: context,
|
|
resolver: task.resolver,
|
|
top_level: top_level_ctx.as_ref(),
|
|
calls: task.calls,
|
|
loop_target: None,
|
|
return_target: None,
|
|
return_buffer,
|
|
unwind_target: None,
|
|
outer_catch_clauses: None,
|
|
const_strings: Default::default(),
|
|
registry,
|
|
var_assignment,
|
|
type_cache,
|
|
primitives,
|
|
init_bb,
|
|
builder,
|
|
module,
|
|
unifier,
|
|
static_value_store,
|
|
need_sret: has_sret,
|
|
current_loc: Default::default(),
|
|
};
|
|
|
|
let result = codegen_function(generator, &mut code_gen_context);
|
|
|
|
// after static analysis, only void functions can have no return at the end.
|
|
if !code_gen_context.is_terminated() {
|
|
code_gen_context.builder.build_return(None);
|
|
}
|
|
|
|
let CodeGenContext { builder, module, .. } = code_gen_context;
|
|
if let Err(e) = result {
|
|
return Err((builder, e));
|
|
}
|
|
|
|
Ok((builder, module, fn_val))
|
|
}
|
|
|
|
pub fn gen_func<'ctx, G: CodeGenerator>(
|
|
context: &'ctx Context,
|
|
generator: &mut G,
|
|
registry: &WorkerRegistry,
|
|
builder: Builder<'ctx>,
|
|
module: Module<'ctx>,
|
|
task: CodeGenTask,
|
|
) -> Result<(Builder<'ctx>, Module<'ctx>, FunctionValue<'ctx>), (Builder<'ctx>, String)> {
|
|
let body = task.body.clone();
|
|
gen_func_impl(context, generator, registry, builder, module, task, |generator, ctx| {
|
|
for stmt in body.iter() {
|
|
generator.gen_stmt(ctx, stmt)?;
|
|
}
|
|
Ok(())
|
|
})
|
|
}
|