use clap::Parser; use inkwell::{ memory_buffer::MemoryBuffer, passes::PassBuilderOptions, support::is_multithreaded, targets::*, OptimizationLevel, }; use parking_lot::{Mutex, RwLock}; use std::{collections::HashMap, fs, path::Path, sync::Arc}; use nac3core::{ codegen::{ concrete_type::ConcreteTypeStore, irrt::load_irrt, CodeGenLLVMOptions, CodeGenTargetMachineOptions, CodeGenTask, DefaultCodeGenerator, WithCall, WorkerRegistry, }, symbol_resolver::SymbolResolver, toplevel::{ composer::TopLevelComposer, helper::parse_parameter_default_value, type_annotation::*, TopLevelDef, }, typecheck::{ type_inferencer::PrimitiveStore, typedef::{FunSignature, Type, Unifier}, }, }; use nac3parser::{ ast::{Constant, Expr, ExprKind, StmtKind, StrRef}, parser, }; mod basic_symbol_resolver; use basic_symbol_resolver::*; /// Command-line argument parser definition. #[derive(Parser)] #[command(author, version, about, long_about = None)] struct CommandLineArgs { /// The name of the input file. file_name: String, /// The number of threads allocated to processing the source file. If 0 is passed to this /// parameter, all available threads will be used for compilation. #[arg(short = 'T', default_value_t = 1)] threads: u32, /// The level to optimize the LLVM IR. #[arg(short = 'O', default_value_t = 2, value_parser = clap::value_parser!(u32).range(0..=3))] opt_level: u32, /// Whether to emit LLVM IR at the end of every module. /// /// If multithreaded compilation is also enabled, each thread will emit its own module. #[arg(long, default_value_t = false)] emit_llvm: bool, /// The target triple to compile for. #[arg(long)] triple: Option, /// The target CPU to compile for. #[arg(long)] mcpu: Option, /// Additional target features to enable/disable, specified using the `+`/`-` prefixes. #[arg(long)] target_features: Option, } fn handle_typevar_definition( var: &Expr, resolver: &(dyn SymbolResolver + Send + Sync), def_list: &[Arc>], unifier: &mut Unifier, primitives: &PrimitiveStore, ) -> Result { let ExprKind::Call { func, args, .. } = &var.node else { return Err(format!( "expression {:?} cannot be handled as a generic parameter in global scope", var )) }; match &func.node { ExprKind::Name { id, .. } if id == &"TypeVar".into() => { let ExprKind::Constant { value: Constant::Str(ty_name), .. } = &args[0].node else { return Err(format!("Expected string constant for first parameter of `TypeVar`, got {:?}", &args[0].node)) }; let generic_name: StrRef = ty_name.to_string().into(); let constraints = args .iter() .skip(1) .map(|x| -> Result { let ty = parse_ast_to_type_annotation_kinds( resolver, def_list, unifier, primitives, x, Default::default(), None, )?; get_type_from_type_annotation_kinds( def_list, unifier, primitives, &ty, &mut None ) }) .collect::, _>>()?; let loc = func.location; if constraints.len() == 1 { return Err(format!("A single constraint is not allowed (at {})", loc)) } Ok(unifier.get_fresh_var_with_range(&constraints, Some(generic_name), Some(loc)).0) } ExprKind::Name { id, .. } if id == &"ConstGeneric".into() => { if args.len() != 2 { return Err(format!("Expected 2 arguments for `ConstGeneric`, got {}", args.len())) } let ExprKind::Constant { value: Constant::Str(ty_name), .. } = &args[0].node else { return Err(format!( "Expected string constant for first parameter of `ConstGeneric`, got {:?}", &args[0].node )) }; let generic_name: StrRef = ty_name.to_string().into(); let ty = parse_ast_to_type_annotation_kinds( resolver, def_list, unifier, primitives, &args[1], Default::default(), None, )?; let constraint = get_type_from_type_annotation_kinds( def_list, unifier, primitives, &ty, &mut None )?; let loc = func.location; Ok(unifier.get_fresh_const_generic_var(constraint, Some(generic_name), Some(loc)).0) } _ => Err(format!( "expression {:?} cannot be handled as a generic parameter in global scope", var )) } } fn handle_assignment_pattern( targets: &[Expr], value: &Expr, resolver: &(dyn SymbolResolver + Send + Sync), internal_resolver: &ResolverInternal, def_list: &[Arc>], unifier: &mut Unifier, primitives: &PrimitiveStore, ) -> Result<(), String> { if targets.len() == 1 { match &targets[0].node { ExprKind::Name { id, .. } => { if let Ok(var) = handle_typevar_definition( value, resolver, def_list, unifier, primitives, ) { internal_resolver.add_id_type(*id, var); Ok(()) } else if let Ok(val) = parse_parameter_default_value(value, resolver) { internal_resolver.add_module_global(*id, val); Ok(()) } else { Err(format!("fails to evaluate this expression `{:?}` as a constant or generic parameter at {}", targets[0].node, targets[0].location, )) } } ExprKind::List { elts, .. } | ExprKind::Tuple { elts, .. } => { handle_assignment_pattern( elts, value, resolver, internal_resolver, def_list, unifier, primitives, )?; Ok(()) } _ => Err(format!( "assignment to {:?} is not supported at {}", targets[0], targets[0].location )), } } else { match &value.node { ExprKind::List { elts, .. } | ExprKind::Tuple { elts, .. } => { if elts.len() != targets.len() { Err(format!( "number of elements to unpack does not match (expect {}, found {}) at {}", targets.len(), elts.len(), value.location )) } else { for (tar, val) in targets.iter().zip(elts) { handle_assignment_pattern( std::slice::from_ref(tar), val, resolver, internal_resolver, def_list, unifier, primitives, )?; } Ok(()) } } _ => Err(format!( "unpack of this expression is not supported at {}", value.location )), } } } fn main() { let cli = CommandLineArgs::parse(); let CommandLineArgs { file_name, threads, opt_level, emit_llvm, triple, mcpu, target_features, } = cli; Target::initialize_all(&InitializationConfig::default()); let host_target_machine = CodeGenTargetMachineOptions::from_host(); let triple = triple.unwrap_or(host_target_machine.triple.clone()); let mcpu = mcpu .map(|arg| if arg == "native" { host_target_machine.cpu.clone() } else { arg }) .unwrap_or_default(); let target_features = target_features.unwrap_or_default(); let threads = if is_multithreaded() { if threads == 0 { std::thread::available_parallelism() .map(|threads| threads.get() as u32) .unwrap_or(1u32) } else { threads } } else { if threads != 1 { println!("Warning: Number of threads specified in command-line but multithreading is disabled in LLVM at build time! Defaulting to single-threaded compilation") } 1 }; let opt_level = match opt_level { 0 => OptimizationLevel::None, 1 => OptimizationLevel::Less, 2 => OptimizationLevel::Default, // The default behavior for -O where n>3 defaults to O3 for both Clang and GCC _ => OptimizationLevel::Aggressive, }; let program = match fs::read_to_string(file_name.clone()) { Ok(program) => program, Err(err) => { println!("Cannot open input file: {}", err); return; } }; let primitive: PrimitiveStore = TopLevelComposer::make_primitives().0; let (mut composer, builtins_def, builtins_ty) = TopLevelComposer::new(vec![], Default::default()); let internal_resolver: Arc = ResolverInternal { id_to_type: builtins_ty.into(), id_to_def: builtins_def.into(), class_names: Default::default(), module_globals: Default::default(), str_store: Default::default(), }.into(); let resolver = Arc::new(Resolver(internal_resolver.clone())) as Arc; let parser_result = parser::parse_program(&program, file_name.into()).unwrap(); for stmt in parser_result.into_iter() { match &stmt.node { StmtKind::Assign { targets, value, .. } => { let def_list = composer.extract_def_list(); let unifier = &mut composer.unifier; let primitives = &composer.primitives_ty; if let Err(err) = handle_assignment_pattern( targets, value, resolver.as_ref(), internal_resolver.as_ref(), &def_list, unifier, primitives, ) { eprintln!("{}", err); return; } }, // allow (and ignore) "from __future__ import annotations" StmtKind::ImportFrom { module, names, .. } if module == &Some("__future__".into()) && names.len() == 1 && names[0].name == "annotations".into() => (), _ => { let (name, def_id, ty) = composer.register_top_level(stmt, Some(resolver.clone()), "__main__".into(), true).unwrap(); internal_resolver.add_id_def(name, def_id); if let Some(ty) = ty { internal_resolver.add_id_type(name, ty); } } } } let signature = FunSignature { args: vec![], ret: primitive.int32, vars: HashMap::new() }; let mut store = ConcreteTypeStore::new(); let mut cache = HashMap::new(); let signature = store.from_signature(&mut composer.unifier, &primitive, &signature, &mut cache); let signature = store.add_cty(signature); composer.start_analysis(true).unwrap(); let top_level = Arc::new(composer.make_top_level_context()); let instance = { let defs = top_level.definitions.read(); let mut instance = defs[resolver .get_identifier_def("run".into()) .unwrap_or_else(|_| panic!("cannot find run() entry point")) .0] .write(); if let TopLevelDef::Function { instance_to_stmt, instance_to_symbol, .. } = &mut *instance { instance_to_symbol.insert("".to_string(), "run".to_string()); instance_to_stmt[""].clone() } else { unreachable!() } }; let llvm_options = CodeGenLLVMOptions { opt_level, target: CodeGenTargetMachineOptions { triple, cpu: mcpu, features: target_features, reloc_mode: RelocMode::PIC, ..host_target_machine }, }; let task = CodeGenTask { subst: Default::default(), symbol_name: "run".to_string(), body: instance.body, signature, resolver, store, unifier_index: instance.unifier_id, calls: instance.calls, id: 0, }; let membuffers: Arc>>> = Default::default(); let membuffer = membuffers.clone(); let f = Arc::new(WithCall::new(Box::new(move |module| { let buffer = module.write_bitcode_to_memory(); let buffer = buffer.as_slice().into(); membuffer.lock().push(buffer); }))); let threads = (0..threads) .map(|i| Box::new(DefaultCodeGenerator::new(format!("module{}", i), 64))) .collect(); let (registry, handles) = WorkerRegistry::create_workers(threads, top_level, &llvm_options, f); registry.add_task(task); registry.wait_tasks_complete(handles); let buffers = membuffers.lock(); let context = inkwell::context::Context::create(); let main = context .create_module_from_ir(MemoryBuffer::create_from_memory_range(&buffers[0], "main")) .unwrap(); if emit_llvm { main.write_bitcode_to_path(Path::new("main.bc")); } for (idx, buffer) in buffers.iter().skip(1).enumerate() { let other = context .create_module_from_ir(MemoryBuffer::create_from_memory_range(buffer, "main")) .unwrap(); if emit_llvm { other.write_bitcode_to_path(Path::new(&format!("module{}.bc", idx))); } main.link_in_module(other).unwrap(); } let irrt = load_irrt(&context); if emit_llvm { irrt.write_bitcode_to_path(Path::new("irrt.bc")); } main.link_in_module(irrt).unwrap(); let mut function_iter = main.get_first_function(); while let Some(func) = function_iter { if func.count_basic_blocks() > 0 && func.get_name().to_str().unwrap() != "run" { func.set_linkage(inkwell::module::Linkage::Private); } function_iter = func.get_next_function(); } let target_machine = llvm_options.target .create_target_machine(llvm_options.opt_level) .expect("couldn't create target machine"); let pass_options = PassBuilderOptions::create(); pass_options.set_merge_functions(true); let passes = format!("default", opt_level as u32); let result = main.run_passes(passes.as_str(), &target_machine, pass_options); if let Err(err) = result { panic!("Failed to run optimization for module `main`: {}", err.to_string()); } target_machine .write_to_file(&main, FileType::Object, Path::new("module.o")) .expect("couldn't write module to file"); }